uvm_fault: uvm_fault_lower
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syzbot
Dec 16, 2021, 2:02:29 AM12/16/21
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 4023ddd7d2e6 pool_get w/ PR_ZERO is better than following ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1463a925b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=c172bd335801b67e515b
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c172bd...@syzkaller.appspotmail.com
uvm_fault(0xfffffd806ef47e68, 0x0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*219428 30014 32767 0x10 0 1K syz-executor.0
62455 30014 32767 0x10 0x4000000 0 syz-executor.0
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: 10
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffffd806ef47e68, 0x0, 0, 1) -> e
ddb{1}> trace
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: -5
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff8000246a3e50
rbx 0
rdx 0
rcx 0
rax 0xffff8000fffee540
r8 0xffffffff821e656e witness_assert+0x1fe
r9 0x5
r10 0x4dcc940df8027664
r11 0x9762b83e1b793874
r12 0xffff8000246a3f60
r13 0xfffffd8066899850
r14 0
r15 0xffffffff81d65300 uvn_flush+0x990
rip 0xffffffff81a60511 uvm_fault_lower+0xbb1
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000246a3dc0
ss 0
uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
ddb{1}> show proc
PROC (syz-executor.0) pid=219428 stat=onproc
flags process=10<SUGID> proc=0
pri=36, usrpri=59, nice=20
forw=0xffffffffffffffff, list=0xffff8000fffee000,0xffff8000fffef270
process=0xffff8000ffff94d0 user=0xffff80002469f000, vmspace=0xfffffd806ef47e68
estcpu=9, cpticks=2, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*30014 219428 82669 32767 7 0x10 syz-executor.0
30014 148989 82669 32767 3 0x4000090 fsleep syz-executor.0
30014 62455 82669 32767 7 0x4000010 syz-executor.0
82669 93300 88202 32767 3 0x90 nanoslp syz-executor.0
88202 208813 30382 0 3 0x82 wait syz-executor.0
69391 282682 3156 32767 3 0x90 nanoslp syz-executor.1
3156 253269 30382 0 3 0x82 wait syz-executor.1
30429 276064 0 0 3 0x14200 bored sosplice
30382 164205 91524 0 3 0x82 thrsleep syz-fuzzer
30382 364416 91524 0 3 0x4000082 nanoslp syz-fuzzer
30382 273565 91524 0 3 0x4000082 thrsleep syz-fuzzer
30382 236582 91524 0 3 0x4000082 kqread syz-fuzzer
30382 484628 91524 0 3 0x4000082 thrsleep syz-fuzzer
30382 415489 91524 0 3 0x4000082 thrsleep syz-fuzzer
30382 177000 91524 0 3 0x4000082 nanoslp syz-fuzzer
30382 17009 91524 0 3 0x4000082 thrsleep syz-fuzzer
91524 181086 34510 0 3 0x10008a sigsusp ksh
34510 68067 58129 0 3 0x9a kqread sshd
47891 358475 1 0 3 0x100083 ttyin getty
58129 240978 1 0 3 0x88 kqread sshd
57606 214250 31086 73 3 0x100090 kqread syslogd
31086 67097 1 0 3 0x100082 netio syslogd
1346 91193 1 0 3 0x100080 kqread resolvd
83846 12117 40682 77 3 0x100092 kqread dhcpleased
62131 78963 40682 77 3 0x100092 kqread dhcpleased
40682 175656 1 0 3 0x80 kqread dhcpleased
73481 32344 0 0 3 0x14200 bored smr
18308 315820 0 0 2 0x14200 zerothread
69659 418634 0 0 3 0x14200 aiodoned aiodoned
91352 52196 0 0 3 0x14200 syncer update
67646 419620 0 0 3 0x14200 cleaner cleaner
89143 332249 0 0 3 0x14200 reaper reaper
15957 210294 0 0 3 0x14200 pgdaemon pagedaemon
61565 499417 0 0 3 0x14200 bored viomb
59266 192004 0 0 3 0x40014200 acpi0 acpi0
20782 396580 0 0 3 0x40014200 idle1
56154 86664 0 0 3 0x14200 bored softnet
83038 258964 0 0 3 0x14200 bored systqmp
27234 144257 0 0 3 0x14200 bored systq
35829 426347 0 0 3 0x40014200 bored softclock
76432 98549 0 0 3 0x40014200 idle0
1 217074 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 30014 (syz-executor.0) thread 0xffff8000fffee540 (219428)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8286b6c8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801
#6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288
#7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640
#8 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#9 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#10 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10132 6356K 6379K 78643K 11247 0
pcb 13 12K 14K 78643K 17 0
rtable 108 3K 4K 78643K 938 0
ifaddr 39 10K 10K 78643K 96 0
sysctl 2 0K 2K 78643K 6 0
counters 44 34K 34K 78643K 60 0
ioctlops 0 0K 2K 78643K 181 0
iov 0 0K 24K 78643K 1886 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1209 76K 76K 78643K 2321 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 187 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1142 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 7 21K 33K 78643K 14112 0
sigio 0 0K 0K 78643K 1307 0
proc 56 74K 99K 78643K 1342 0
subproc 26 1K 1K 78643K 130 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 21488 0
in_multi 33 2K 2K 78643K 255 0
ether_multi 1 0K 0K 78643K 33 0
mrt 1 0K 0K 78643K 3 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 151 678K 678K 78643K 151 0
exec 0 0K 2K 78643K 2688 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 309 41K 57K 78643K 184500 0
UVM aobj 131 6K 6K 78643K 142 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 876 0
NDP 5 0K 0K 78643K 33 0
temp 76 4195K 4291K 78643K 34920 0
kqueue 12 18K 24K 78643K 570 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 503 0 500 6 5 1 3 0 8 0
rtentry 112 145 0 100 2 0 2 2 0 8 0
unpcb 128 9876 0 9863 58 53 5 7 0 8 4
syncache 296 169 0 169 21 21 0 1 0 8 0
tcpqe 32 25 0 25 10 10 0 1 0 8 0
tcpcb 736 13007 0 13003 222 213 9 21 0 8 8
arp 120 25 0 19 1 0 1 1 0 8 0
ipq 40 18 0 18 8 8 0 1 0 8 0
ipqe 40 542 0 542 8 8 0 1 0 8 0
inpcb 304 18291 0 18284 155 147 8 14 0 8 7
ip6q 72 44 0 44 3 3 0 1 0 8 0
ip6af 40 84 0 84 3 3 0 1 0 8 0
nd6 48 39 0 32 1 0 1 1 0 8 0
kcovpl 48 10 0 8 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 641 0 450 18 6 12 14 0 8 0
art_table 32 642 0 450 2 0 2 2 0 8 0
art_node 16 144 0 103 1 0 1 1 0 8 0
sysvmsgpl 40 30 0 10 1 0 1 1 0 8 0
semapl 112 1140 0 1130 1 0 1 1 0 8 0
shmpl 112 139 0 11 5 1 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 19682 0 18273 89 0 89 89 0 8 0
ffsino 272 19682 0 18273 95 0 95 95 0 8 0
nchpl 144 39669 0 38067 60 0 60 60 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 122064 0 122064 1 0 1 1 0 8 1
percpumem 16 42 0 8 1 0 1 1 0 8 0
scxspl 216 120233 0 120233 35 34 1 8 0 8 1
plimitpl 152 1369 0 1359 1 0 1 1 0 8 0
sigapl 424 14310 0 14277 4 0 4 4 0 8 0
futexpl 64 94661 0 94660 1 0 1 1 0 8 0
knotepl 112 110 0 0 3 1 2 3 0 8 0
kqueuepl 216 2852 0 2835 52 47 5 10 0 8 4
pipepl 336 2867 0 2857 118 117 1 9 0 8 0
fdescpl 496 14295 0 14277 3 0 3 3 0 8 0
filepl 152 80841 0 80739 149 139 10 14 0 8 6
lockfpl 104 1798 0 1796 1 0 1 1 0 8 0
lockfspl 48 678 0 676 1 0 1 1 0 8 0
sessionpl 144 25 0 15 1 0 1 1 0 8 0
pgrppl 48 200 0 190 1 0 1 1 0 8 0
ucredpl 96 8812 0 8800 1 0 1 1 0 8 0
zombiepl 144 14277 0 14276 1 0 1 1 0 8 0
processpl 1064 14310 0 14276 3 0 3 3 0 8 0
procpl 672 41808 0 41765 20 15 5 6 0 8 1
sosppl 168 343 0 343 20 20 0 1 0 8 0
sockpl 480 28874 0 28851 453 442 11 33 0 8 8
mcl64k 65536 29 0 0 4 1 3 3 0 8 0
mcl16k 16384 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 45 0 0 2 0 2 2 0 8 0
mcl9k 9216 17 0 0 2 0 2 2 0 8 0
mcl8k 8192 25 0 0 4 1 3 3 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 12 0 0 1 0 1 1 0 8 0
mcl2k 2048 581 0 0 18 6 12 17 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 1100 0 0 30 0 30 30 0 8 0
bufpl 288 27758 0 21433 453 1 452 453 0 8 0
anonpl 24 4540064 0 4530942 282 216 66 83 0 186 0
amapchunkpl 152 446722 0 446251 81 60 21 33 0 158 0
amappl16 200 63297 0 63069 262 249 13 27 0 8 0
amappl15 192 2139 0 2134 1 0 1 1 0 8 0
amappl14 184 3 0 3 2 2 0 1 0 8 0
amappl13 176 846 0 844 1 0 1 1 0 8 0
amappl12 168 829 0 825 1 0 1 1 0 8 0
amappl11 160 333 0 320 1 0 1 1 0 8 0
amappl10 152 609 0 602 1 0 1 1 0 8 0
amappl9 144 9175 0 9173 1 0 1 1 0 8 0
amappl8 136 1429 0 1289 5 0 5 5 0 8 0
amappl7 128 671 0 663 1 0 1 1 0 8 0
amappl6 120 9025 0 9012 1 0 1 1 0 8 0
amappl5 112 15274 0 15252 1 0 1 1 0 8 0
amappl4 104 1065 0 1035 1 0 1 1 0 8 0
amappl3 96 1951 0 1935 1 0 1 1 0 8 0
amappl2 88 15640 0 15592 14 12 2 2 0 8 0
amappl1 80 245624 0 245194 12 2 10 12 0 8 0
amappl 88 183564 0 183404 7 2 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 141 0 11 3 0 3 3 0 8 0
uaddrrnd 24 14295 0 14277 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 14295 0 14277 1 0 1 1 0 8 0
vmmpekpl 168 106241 0 106222 2 0 2 2 0 8 0
vmmpepl 168 1339802 0 1338184 252 176 76 91 0 357 0
vmsppl 368 14294 0 14277 2 0 2 2 0 8 0
rwobjpl 56 347589 0 340491 128 27 101 104 0 8 0
pdppl 4096 28598 0 28554 68 22 46 50 0 8 2
pvpl 32 7313393 0 7300666 497 384 113 143 0 265 3
pmappl 248 14294 0 14277 2 0 2 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 1135 0 369 23 0 23 23 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
uvm_fault(fffffd806ef47e68,8022bfd7000,0,2) at uvm_fault+0x193 sys/uvm/uvm_fault.c:624
upageflttrap(ffff80002467ecd0,8022bfd7000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002467ecd0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x801f8c1b9d0, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
uvm_fault(fffffd806ef47e68,8022bfd7000,0,2) at uvm_fault+0x193 sys/uvm/uvm_fault.c:624
upageflttrap(ffff80002467ecd0,8022bfd7000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002467ecd0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x801f8c1b9d0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: 10
ddb{1}> trace
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: -5
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 4023ddd7d2e6 pool_get w/ PR_ZERO is better than following ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1463a925b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=c172bd335801b67e515b
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c172bd...@syzkaller.appspotmail.com
uvm_fault(0xfffffd806ef47e68, 0x0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*219428 30014 32767 0x10 0 1K syz-executor.0
62455 30014 32767 0x10 0x4000000 0 syz-executor.0
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: 10
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffffd806ef47e68, 0x0, 0, 1) -> e
ddb{1}> trace
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: -5
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff8000246a3e50
rbx 0
rdx 0
rcx 0
rax 0xffff8000fffee540
r8 0xffffffff821e656e witness_assert+0x1fe
r9 0x5
r10 0x4dcc940df8027664
r11 0x9762b83e1b793874
r12 0xffff8000246a3f60
r13 0xfffffd8066899850
r14 0
r15 0xffffffff81d65300 uvn_flush+0x990
rip 0xffffffff81a60511 uvm_fault_lower+0xbb1
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000246a3dc0
ss 0
uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
ddb{1}> show proc
PROC (syz-executor.0) pid=219428 stat=onproc
flags process=10<SUGID> proc=0
pri=36, usrpri=59, nice=20
forw=0xffffffffffffffff, list=0xffff8000fffee000,0xffff8000fffef270
process=0xffff8000ffff94d0 user=0xffff80002469f000, vmspace=0xfffffd806ef47e68
estcpu=9, cpticks=2, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*30014 219428 82669 32767 7 0x10 syz-executor.0
30014 148989 82669 32767 3 0x4000090 fsleep syz-executor.0
30014 62455 82669 32767 7 0x4000010 syz-executor.0
82669 93300 88202 32767 3 0x90 nanoslp syz-executor.0
88202 208813 30382 0 3 0x82 wait syz-executor.0
69391 282682 3156 32767 3 0x90 nanoslp syz-executor.1
3156 253269 30382 0 3 0x82 wait syz-executor.1
30429 276064 0 0 3 0x14200 bored sosplice
30382 164205 91524 0 3 0x82 thrsleep syz-fuzzer
30382 364416 91524 0 3 0x4000082 nanoslp syz-fuzzer
30382 273565 91524 0 3 0x4000082 thrsleep syz-fuzzer
30382 236582 91524 0 3 0x4000082 kqread syz-fuzzer
30382 484628 91524 0 3 0x4000082 thrsleep syz-fuzzer
30382 415489 91524 0 3 0x4000082 thrsleep syz-fuzzer
30382 177000 91524 0 3 0x4000082 nanoslp syz-fuzzer
30382 17009 91524 0 3 0x4000082 thrsleep syz-fuzzer
91524 181086 34510 0 3 0x10008a sigsusp ksh
34510 68067 58129 0 3 0x9a kqread sshd
47891 358475 1 0 3 0x100083 ttyin getty
58129 240978 1 0 3 0x88 kqread sshd
57606 214250 31086 73 3 0x100090 kqread syslogd
31086 67097 1 0 3 0x100082 netio syslogd
1346 91193 1 0 3 0x100080 kqread resolvd
83846 12117 40682 77 3 0x100092 kqread dhcpleased
62131 78963 40682 77 3 0x100092 kqread dhcpleased
40682 175656 1 0 3 0x80 kqread dhcpleased
73481 32344 0 0 3 0x14200 bored smr
18308 315820 0 0 2 0x14200 zerothread
69659 418634 0 0 3 0x14200 aiodoned aiodoned
91352 52196 0 0 3 0x14200 syncer update
67646 419620 0 0 3 0x14200 cleaner cleaner
89143 332249 0 0 3 0x14200 reaper reaper
15957 210294 0 0 3 0x14200 pgdaemon pagedaemon
61565 499417 0 0 3 0x14200 bored viomb
59266 192004 0 0 3 0x40014200 acpi0 acpi0
20782 396580 0 0 3 0x40014200 idle1
56154 86664 0 0 3 0x14200 bored softnet
83038 258964 0 0 3 0x14200 bored systqmp
27234 144257 0 0 3 0x14200 bored systq
35829 426347 0 0 3 0x40014200 bored softclock
76432 98549 0 0 3 0x40014200 idle0
1 217074 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 30014 (syz-executor.0) thread 0xffff8000fffee540 (219428)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8286b6c8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801
#6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288
#7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640
#8 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#9 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#10 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10132 6356K 6379K 78643K 11247 0
pcb 13 12K 14K 78643K 17 0
rtable 108 3K 4K 78643K 938 0
ifaddr 39 10K 10K 78643K 96 0
sysctl 2 0K 2K 78643K 6 0
counters 44 34K 34K 78643K 60 0
ioctlops 0 0K 2K 78643K 181 0
iov 0 0K 24K 78643K 1886 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1209 76K 76K 78643K 2321 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 187 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1142 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 7 21K 33K 78643K 14112 0
sigio 0 0K 0K 78643K 1307 0
proc 56 74K 99K 78643K 1342 0
subproc 26 1K 1K 78643K 130 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 21488 0
in_multi 33 2K 2K 78643K 255 0
ether_multi 1 0K 0K 78643K 33 0
mrt 1 0K 0K 78643K 3 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 151 678K 678K 78643K 151 0
exec 0 0K 2K 78643K 2688 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 309 41K 57K 78643K 184500 0
UVM aobj 131 6K 6K 78643K 142 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 876 0
NDP 5 0K 0K 78643K 33 0
temp 76 4195K 4291K 78643K 34920 0
kqueue 12 18K 24K 78643K 570 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 503 0 500 6 5 1 3 0 8 0
rtentry 112 145 0 100 2 0 2 2 0 8 0
unpcb 128 9876 0 9863 58 53 5 7 0 8 4
syncache 296 169 0 169 21 21 0 1 0 8 0
tcpqe 32 25 0 25 10 10 0 1 0 8 0
tcpcb 736 13007 0 13003 222 213 9 21 0 8 8
arp 120 25 0 19 1 0 1 1 0 8 0
ipq 40 18 0 18 8 8 0 1 0 8 0
ipqe 40 542 0 542 8 8 0 1 0 8 0
inpcb 304 18291 0 18284 155 147 8 14 0 8 7
ip6q 72 44 0 44 3 3 0 1 0 8 0
ip6af 40 84 0 84 3 3 0 1 0 8 0
nd6 48 39 0 32 1 0 1 1 0 8 0
kcovpl 48 10 0 8 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 641 0 450 18 6 12 14 0 8 0
art_table 32 642 0 450 2 0 2 2 0 8 0
art_node 16 144 0 103 1 0 1 1 0 8 0
sysvmsgpl 40 30 0 10 1 0 1 1 0 8 0
semapl 112 1140 0 1130 1 0 1 1 0 8 0
shmpl 112 139 0 11 5 1 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 19682 0 18273 89 0 89 89 0 8 0
ffsino 272 19682 0 18273 95 0 95 95 0 8 0
nchpl 144 39669 0 38067 60 0 60 60 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 122064 0 122064 1 0 1 1 0 8 1
percpumem 16 42 0 8 1 0 1 1 0 8 0
scxspl 216 120233 0 120233 35 34 1 8 0 8 1
plimitpl 152 1369 0 1359 1 0 1 1 0 8 0
sigapl 424 14310 0 14277 4 0 4 4 0 8 0
futexpl 64 94661 0 94660 1 0 1 1 0 8 0
knotepl 112 110 0 0 3 1 2 3 0 8 0
kqueuepl 216 2852 0 2835 52 47 5 10 0 8 4
pipepl 336 2867 0 2857 118 117 1 9 0 8 0
fdescpl 496 14295 0 14277 3 0 3 3 0 8 0
filepl 152 80841 0 80739 149 139 10 14 0 8 6
lockfpl 104 1798 0 1796 1 0 1 1 0 8 0
lockfspl 48 678 0 676 1 0 1 1 0 8 0
sessionpl 144 25 0 15 1 0 1 1 0 8 0
pgrppl 48 200 0 190 1 0 1 1 0 8 0
ucredpl 96 8812 0 8800 1 0 1 1 0 8 0
zombiepl 144 14277 0 14276 1 0 1 1 0 8 0
processpl 1064 14310 0 14276 3 0 3 3 0 8 0
procpl 672 41808 0 41765 20 15 5 6 0 8 1
sosppl 168 343 0 343 20 20 0 1 0 8 0
sockpl 480 28874 0 28851 453 442 11 33 0 8 8
mcl64k 65536 29 0 0 4 1 3 3 0 8 0
mcl16k 16384 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 45 0 0 2 0 2 2 0 8 0
mcl9k 9216 17 0 0 2 0 2 2 0 8 0
mcl8k 8192 25 0 0 4 1 3 3 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 12 0 0 1 0 1 1 0 8 0
mcl2k 2048 581 0 0 18 6 12 17 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 1100 0 0 30 0 30 30 0 8 0
bufpl 288 27758 0 21433 453 1 452 453 0 8 0
anonpl 24 4540064 0 4530942 282 216 66 83 0 186 0
amapchunkpl 152 446722 0 446251 81 60 21 33 0 158 0
amappl16 200 63297 0 63069 262 249 13 27 0 8 0
amappl15 192 2139 0 2134 1 0 1 1 0 8 0
amappl14 184 3 0 3 2 2 0 1 0 8 0
amappl13 176 846 0 844 1 0 1 1 0 8 0
amappl12 168 829 0 825 1 0 1 1 0 8 0
amappl11 160 333 0 320 1 0 1 1 0 8 0
amappl10 152 609 0 602 1 0 1 1 0 8 0
amappl9 144 9175 0 9173 1 0 1 1 0 8 0
amappl8 136 1429 0 1289 5 0 5 5 0 8 0
amappl7 128 671 0 663 1 0 1 1 0 8 0
amappl6 120 9025 0 9012 1 0 1 1 0 8 0
amappl5 112 15274 0 15252 1 0 1 1 0 8 0
amappl4 104 1065 0 1035 1 0 1 1 0 8 0
amappl3 96 1951 0 1935 1 0 1 1 0 8 0
amappl2 88 15640 0 15592 14 12 2 2 0 8 0
amappl1 80 245624 0 245194 12 2 10 12 0 8 0
amappl 88 183564 0 183404 7 2 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 141 0 11 3 0 3 3 0 8 0
uaddrrnd 24 14295 0 14277 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 14295 0 14277 1 0 1 1 0 8 0
vmmpekpl 168 106241 0 106222 2 0 2 2 0 8 0
vmmpepl 168 1339802 0 1338184 252 176 76 91 0 357 0
vmsppl 368 14294 0 14277 2 0 2 2 0 8 0
rwobjpl 56 347589 0 340491 128 27 101 104 0 8 0
pdppl 4096 28598 0 28554 68 22 46 50 0 8 2
pvpl 32 7313393 0 7300666 497 384 113 143 0 265 3
pmappl 248 14294 0 14277 2 0 2 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 1135 0 369 23 0 23 23 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
uvm_fault(fffffd806ef47e68,8022bfd7000,0,2) at uvm_fault+0x193 sys/uvm/uvm_fault.c:624
upageflttrap(ffff80002467ecd0,8022bfd7000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002467ecd0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x801f8c1b9d0, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
uvm_fault(fffffd806ef47e68,8022bfd7000,0,2) at uvm_fault+0x193 sys/uvm/uvm_fault.c:624
upageflttrap(ffff80002467ecd0,8022bfd7000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002467ecd0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x801f8c1b9d0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: 10
ddb{1}> trace
uvm_fault_lower(ffff8000246a3f60,ffff8000246a3f98,ffff8000246a3ee0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd806ef47e68,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff8000246a40d0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff8000246a40d0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7ffffd1b90, count: -5
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Dec 16, 2021, 2:34:19 AM12/16/21
to syzkaller-o...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 4023ddd7d2e6 pool_get w/ PR_ZERO is better than following ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1253d1d5b00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150b8233b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c172bd...@syzkaller.appspotmail.com
login: uvm_fault(0xfffffd8008586cf0, 0x0, 0, 1) -> e
220797 42737 0 0 0x4000000 0 syz-executor1794
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
ddb{1}> trace
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
rbx 0
rdx 0x8b
rcx 0x8
rax 0x1
r12 0xffff800021226a80
r13 0xfffffd806ce2ee28
flags process=0 proc=4000000<THREAD>
pri=36, usrpri=60, nice=20
forw=0xffffffffffffffff, list=0xffff800021193268,0xffff800021192018
process=0xffff8000ffff14d8 user=0xffff800021221000, vmspace=0xfffffd8008586cf0
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
*42737 106416 10376 0 7 0x4000000 syz-executor1794
42737 220797 10376 0 7 0x4000000 syz-executor1794
10376 487437 22010 0 3 0x80 nanoslp syz-executor1794
4299 179263 22010 0 3 0 biowait syz-executor1794
22010 454061 7364 0 3 0x82 nanoslp syz-executor1794
7364 118175 12124 0 3 0x10008a sigsusp ksh
12124 180097 71517 0 3 0x9a kqread sshd
25827 162815 1 0 3 0x100083 ttyin getty
71517 120902 1 0 3 0x88 kqread sshd
81290 442237 89405 73 3 0x100090 kqread syslogd
89405 452524 1 0 3 0x100082 netio syslogd
84552 420772 1 0 3 0x100080 kqread resolvd
51577 181722 94030 77 3 0x100092 kqread dhcpleased
42850 505917 94030 77 3 0x100092 kqread dhcpleased
94030 223341 1 0 3 0x80 kqread dhcpleased
53352 508219 0 0 3 0x14200 bored smr
39814 161099 0 0 3 0x14200 pgzero zerothread
80651 408767 0 0 3 0x14200 aiodoned aiodoned
70713 418418 0 0 3 0x14200 syncer update
77735 478406 0 0 3 0x14200 cleaner cleaner
42854 347986 0 0 3 0x14200 reaper reaper
33906 138368 0 0 3 0x14200 pgdaemon pagedaemon
35717 19040 0 0 3 0x14200 bored viomb
44437 18484 0 0 3 0x40014200 acpi0 acpi0
56691 227144 0 0 3 0x40014200 idle1
72879 315427 0 0 3 0x14200 bored softnet
71717 411143 0 0 3 0x14200 bored systqmp
30984 523136 0 0 3 0x14200 bored systq
42838 96102 0 0 3 0x40014200 bored softclock
2289 283963 0 0 3 0x40014200 idle0
1 67459 0 0 3 0x82 wait init
exclusive rwlock amaplk r = 0 (0xfffffd806cf430c0)
#2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#4 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd8008586d08)
#2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676
#3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#5 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#6 recall_trap+0x8
Process 4299 (syz-executor1794) thread 0xffff8000ffff6d30 (179263)
exclusive rrwlock inode r = 0 (0xfffffd806d769b48)
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
#9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3065
#10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d769d68)
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413
#6 namei+0x55a sys/kern/vfs_lookup.c:245
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3050
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
pcb 13 8K 8K 78643K 13 0
rtable 62 2K 2K 78643K 108 0
ifaddr 24 7K 7K 78643K 24 0
counters 40 33K 33K 78643K 40 0
ioctlops 0 0K 2K 78643K 25 0
proc 55 74K 75K 78643K 222 0
ether_multi 1 0K 0K 78643K 1 0
exec 0 0K 2K 78643K 312 0
UVM aobj 3 2K 2K 78643K 3 0
temp 18 4181K 4245K 78643K 2072 0
kqueue 11 16K 16K 78643K 20 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 128 33 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 2 1 1 1 0 8 1
tcpcb 736 8 0 5 1 0 1 1 0 8 0
arp 120 2 0 0 1 0 1 1 0 8 0
inpcb 304 25 0 19 1 0 1 1 0 8 0
art_table 32 97 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
ffsino 272 1759 0 372 93 0 93 93 0 8 0
nchpl 144 2284 0 740 59 1 58 58 0 8 0
uvmvnodes 80 1768 0 0 37 0 37 37 0 8 0
vnodes 224 1768 0 0 104 0 104 104 0 8 0
namei 1024 5793 0 5792 2 1 1 1 0 8 0
percpumem 16 32 0 0 1 0 1 1 0 8 0
scxspl 216 5250 0 5249 11 10 1 8 0 8 0
plimitpl 152 15 0 9 1 0 1 1 0 8 0
sigapl 424 404 0 374 4 0 4 4 0 8 0
futexpl 64 550 0 550 1 0 1 1 0 8 1
knotepl 112 36 0 0 2 0 2 2 0 8 0
kqueuepl 216 16 0 9 1 0 1 1 0 8 0
pipepl 336 62 0 59 2 1 1 1 0 8 0
fdescpl 496 390 0 374 3 0 3 3 0 8 0
filepl 152 1823 0 1769 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 17 0 9 1 0 1 1 0 8 0
pgrppl 48 17 0 9 1 0 1 1 0 8 0
ucredpl 96 589 0 579 1 0 1 1 0 8 0
zombiepl 144 374 0 374 2 1 1 1 0 8 1
processpl 1064 404 0 374 3 0 3 3 0 8 0
procpl 672 749 0 717 3 0 3 3 0 8 0
sockpl 480 75 0 53 3 0 3 3 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 89 0 0 10 0 10 10 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 148 0 0 8 0 8 8 0 8 0
bufpl 288 2111 0 87 145 0 145 145 0 8 0
anonpl 24 62216 0 59835 19 3 16 16 0 186 1
amapchunkpl 152 7666 0 7495 9 1 8 8 0 158 1
amappl16 200 203 0 201 2 1 1 1 0 8 0
amappl15 192 58 0 54 1 0 1 1 0 8 0
amappl13 176 16 0 15 2 1 1 1 0 8 0
amappl12 168 11 0 11 2 2 0 1 0 8 0
amappl11 160 63 0 51 1 0 1 1 0 8 0
amappl10 152 7 0 7 1 1 0 1 0 8 0
amappl9 144 225 0 223 1 0 1 1 0 8 0
amappl8 136 252 0 247 1 0 1 1 0 8 0
amappl7 128 29 0 28 1 0 1 1 0 8 0
amappl6 120 35 0 31 1 0 1 1 0 8 0
amappl5 112 209 0 195 1 0 1 1 0 8 0
amappl4 104 649 0 627 1 0 1 1 0 8 0
amappl3 96 319 0 305 1 0 1 1 0 8 0
amappl2 88 271 0 238 1 0 1 1 0 8 0
amappl1 80 9462 0 9091 12 3 9 9 0 8 0
amappl 88 3536 0 3459 3 0 3 3 0 92 0
uaddrrnd 24 390 0 374 1 0 1 1 0 8 0
vmmpekpl 168 6778 0 6763 1 0 1 1 0 8 0
vmmpepl 168 32711 0 31823 46 4 42 42 0 357 3
vmsppl 368 389 0 374 2 0 2 2 0 8 0
rwobjpl 56 11381 0 9084 34 1 33 33 0 8 0
pdppl 4096 788 0 748 66 24 42 46 0 8 2
pvpl 32 150680 0 146397 43 5 38 38 0 265 3
pmappl 248 389 0 374 2 0 2 2 0 8 0
Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f
upageflttrap(ffff80002122c080,cf2b0c900f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002122c080) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end trace frame: 0x0, count: 4
Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f
upageflttrap(ffff80002122c080,cf2b0c900f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002122c080) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end trace frame: 0x0, count: -11
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
ddb{1}> trace
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
ddb{1}>
HEAD commit: 4023ddd7d2e6 pool_get w/ PR_ZERO is better than following ..
git tree: openbsd
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=c172bd335801b67e515b
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=166e0a33b00000
dashboard link: https://syzkaller.appspot.com/bug?extid=c172bd335801b67e515b
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150b8233b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c172bd...@syzkaller.appspotmail.com
kernel: page fault trap, code=0
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*106416 42737 0 0 0x4000000 1K syz-executor1794
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
TID PID UID PRFLAGS PFLAGS CPU COMMAND
220797 42737 0 0 0x4000000 0 syz-executor1794
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xcf2c95d32f0, count: 10
end of kernel
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffffd8008586cf0, 0x0, 0, 1) -> e
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
ddb{1}> trace
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xcf2c95d32f0, count: -5
end of kernel
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800021226970
rdi 0
rsi 0
rbx 0
rdx 0x8b
rcx 0x8
rax 0x1
r8 0xffffffff821e656e witness_assert+0x1fe
r9 0x5
r10 0
r11 0x2a91698ae871a98c
r9 0x5
r10 0
r12 0xffff800021226a80
r13 0xfffffd806ce2ee28
r14 0
r15 0xffffffff81d65300 uvn_flush+0x990
rip 0xffffffff81a60511 uvm_fault_lower+0xbb1
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000212268e0
r15 0xffffffff81d65300 uvn_flush+0x990
rip 0xffffffff81a60511 uvm_fault_lower+0xbb1
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
ss 0
uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
ddb{1}> show proc
PROC (syz-executor1794) pid=106416 stat=onproc
uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
ddb{1}> show proc
flags process=0 proc=4000000<THREAD>
pri=36, usrpri=60, nice=20
forw=0xffffffffffffffff, list=0xffff800021193268,0xffff800021192018
process=0xffff8000ffff14d8 user=0xffff800021221000, vmspace=0xfffffd8008586cf0
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
42737 470227 10376 0 2 0 syz-executor1794
PID TID PPID UID S FLAGS WAIT COMMAND
*42737 106416 10376 0 7 0x4000000 syz-executor1794
42737 220797 10376 0 7 0x4000000 syz-executor1794
10376 487437 22010 0 3 0x80 nanoslp syz-executor1794
4299 179263 22010 0 3 0 biowait syz-executor1794
22010 454061 7364 0 3 0x82 nanoslp syz-executor1794
7364 118175 12124 0 3 0x10008a sigsusp ksh
12124 180097 71517 0 3 0x9a kqread sshd
25827 162815 1 0 3 0x100083 ttyin getty
71517 120902 1 0 3 0x88 kqread sshd
81290 442237 89405 73 3 0x100090 kqread syslogd
89405 452524 1 0 3 0x100082 netio syslogd
84552 420772 1 0 3 0x100080 kqread resolvd
51577 181722 94030 77 3 0x100092 kqread dhcpleased
42850 505917 94030 77 3 0x100092 kqread dhcpleased
94030 223341 1 0 3 0x80 kqread dhcpleased
53352 508219 0 0 3 0x14200 bored smr
39814 161099 0 0 3 0x14200 pgzero zerothread
80651 408767 0 0 3 0x14200 aiodoned aiodoned
70713 418418 0 0 3 0x14200 syncer update
77735 478406 0 0 3 0x14200 cleaner cleaner
42854 347986 0 0 3 0x14200 reaper reaper
33906 138368 0 0 3 0x14200 pgdaemon pagedaemon
35717 19040 0 0 3 0x14200 bored viomb
44437 18484 0 0 3 0x40014200 acpi0 acpi0
56691 227144 0 0 3 0x40014200 idle1
72879 315427 0 0 3 0x14200 bored softnet
71717 411143 0 0 3 0x14200 bored systqmp
30984 523136 0 0 3 0x14200 bored systq
42838 96102 0 0 3 0x40014200 bored softclock
2289 283963 0 0 3 0x40014200 idle0
1 67459 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 42737 (syz-executor1794) thread 0xffff8000211922a8 (106416)
ddb{1}> show all locks
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8286b6c8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801
#6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288
#7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640
#8 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#9 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#10 recall_trap+0x8
Process 42737 (syz-executor1794) thread 0xffff800021192008 (220797)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801
#6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288
#7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640
#8 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#9 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#10 recall_trap+0x8
exclusive rwlock amaplk r = 0 (0xfffffd806cf430c0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 uvm_fault_check+0x3d2 sys/uvm/uvm_fault.c:776
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#4 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd8008586d08)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 uvmfault_lookup+0xe9 sys/uvm/uvm_fault.c:1745
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676
#3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#5 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
#6 recall_trap+0x8
Process 4299 (syz-executor1794) thread 0xffff8000ffff6d30 (179263)
exclusive rrwlock inode r = 0 (0xfffffd806d769b48)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
#9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3065
#10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d769d68)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413
#6 namei+0x55a sys/kern/vfs_lookup.c:245
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3050
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10105 6348K 6379K 78643K 11195 0
Type InUse MemUse HighUse Limit Requests Type Lim
pcb 13 8K 8K 78643K 13 0
rtable 62 2K 2K 78643K 108 0
ifaddr 24 7K 7K 78643K 24 0
counters 40 33K 33K 78643K 40 0
ioctlops 0 0K 2K 78643K 25 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1182 74K 74K 78643K 1187 0
log 0 0K 0K 78643K 5 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
UFS mount 5 36K 36K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 1 0K 5K 78643K 526 0
ACPI 1697 195K 286K 78643K 12598 0
proc 55 74K 75K 78643K 222 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 11 0K 0K 78643K 11 0
NFS daemon 1 16K 16K 78643K 1 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
MSDOSFS mount 1 16K 16K 78643K 1 0
exec 0 0K 2K 78643K 312 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 96 4K 5K 78643K 3933 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 3 0K 0K 78643K 3 0
crypto data 1 1K 1K 78643K 1 0
temp 18 4181K 4245K 78643K 2072 0
kqueue 11 16K 16K 78643K 20 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 17 0 14 1 0 1 1 0 8 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 128 33 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 2 1 1 1 0 8 1
tcpcb 736 8 0 5 1 0 1 1 0 8 0
arp 120 2 0 0 1 0 1 1 0 8 0
inpcb 304 25 0 19 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 96 0 0 6 0 6 6 0 8 0
art_table 32 97 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1759 0 372 87 0 87 87 0 8 0
ffsino 272 1759 0 372 93 0 93 93 0 8 0
nchpl 144 2284 0 740 59 1 58 58 0 8 0
uvmvnodes 80 1768 0 0 37 0 37 37 0 8 0
vnodes 224 1768 0 0 104 0 104 104 0 8 0
namei 1024 5793 0 5792 2 1 1 1 0 8 0
percpumem 16 32 0 0 1 0 1 1 0 8 0
scxspl 216 5250 0 5249 11 10 1 8 0 8 0
plimitpl 152 15 0 9 1 0 1 1 0 8 0
sigapl 424 404 0 374 4 0 4 4 0 8 0
futexpl 64 550 0 550 1 0 1 1 0 8 1
knotepl 112 36 0 0 2 0 2 2 0 8 0
kqueuepl 216 16 0 9 1 0 1 1 0 8 0
pipepl 336 62 0 59 2 1 1 1 0 8 0
fdescpl 496 390 0 374 3 0 3 3 0 8 0
filepl 152 1823 0 1769 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 17 0 9 1 0 1 1 0 8 0
pgrppl 48 17 0 9 1 0 1 1 0 8 0
ucredpl 96 589 0 579 1 0 1 1 0 8 0
zombiepl 144 374 0 374 2 1 1 1 0 8 1
processpl 1064 404 0 374 3 0 3 3 0 8 0
procpl 672 749 0 717 3 0 3 3 0 8 0
sockpl 480 75 0 53 3 0 3 3 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 89 0 0 10 0 10 10 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 148 0 0 8 0 8 8 0 8 0
bufpl 288 2111 0 87 145 0 145 145 0 8 0
anonpl 24 62216 0 59835 19 3 16 16 0 186 1
amapchunkpl 152 7666 0 7495 9 1 8 8 0 158 1
amappl16 200 203 0 201 2 1 1 1 0 8 0
amappl15 192 58 0 54 1 0 1 1 0 8 0
amappl13 176 16 0 15 2 1 1 1 0 8 0
amappl12 168 11 0 11 2 2 0 1 0 8 0
amappl11 160 63 0 51 1 0 1 1 0 8 0
amappl10 152 7 0 7 1 1 0 1 0 8 0
amappl9 144 225 0 223 1 0 1 1 0 8 0
amappl8 136 252 0 247 1 0 1 1 0 8 0
amappl7 128 29 0 28 1 0 1 1 0 8 0
amappl6 120 35 0 31 1 0 1 1 0 8 0
amappl5 112 209 0 195 1 0 1 1 0 8 0
amappl4 104 649 0 627 1 0 1 1 0 8 0
amappl3 96 319 0 305 1 0 1 1 0 8 0
amappl2 88 271 0 238 1 0 1 1 0 8 0
amappl1 80 9462 0 9091 12 3 9 9 0 8 0
amappl 88 3536 0 3459 3 0 3 3 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 2 0 0 1 0 1 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
uaddrrnd 24 390 0 374 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 390 0 374 1 0 1 1 0 8 0
vmmpekpl 168 6778 0 6763 1 0 1 1 0 8 0
vmmpepl 168 32711 0 31823 46 4 42 42 0 357 3
vmsppl 368 389 0 374 2 0 2 2 0 8 0
rwobjpl 56 11381 0 9084 34 1 33 33 0 8 0
pdppl 4096 788 0 748 66 24 42 46 0 8 2
pvpl 32 150680 0 146397 43 5 38 38 0 265 3
pmappl 248 389 0 374 2 0 2 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 431 0 28 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
intr_handler(ffff80002122bd10,ffff80000006a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
uvm_fault(fffffd8008586cf0,cf2b0c90000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
upageflttrap(ffff80002122c080,cf2b0c900f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002122c080) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end trace frame: 0x0, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
intr_handler(ffff80002122bd10,ffff80000006a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532
x86_ipi_db(ffffffff82783ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
uvm_fault(fffffd8008586cf0,cf2b0c90000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639
__mp_lock(ffffffff8286b4c0) at __mp_lock+0x122 sys/kern/kern_lock.c:147
upageflttrap(ffff80002122c080,cf2b0c900f8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002122c080) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end trace frame: 0x0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xcf2c95d32f0, count: 10
end of kernel
ddb{1}> trace
uvm_fault_lower(ffff800021226a80,ffff800021226ab8,ffff800021226a00,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325
uvm_fault(fffffd8008586cf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640
upageflttrap(ffff800021226bf0,20000000) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800021226bf0) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xcf2c95d32f0, count: -5
end of kernel
ddb{1}>
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