uvm_fault: vio_rxeof
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syzbot
Sep 18, 2019, 1:39:08 PM9/18/19
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: dd27a176 Let snmpd's regress test make use of our very own..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16bbd565600000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=6cc72412d8ddcf87f8a1
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+6cc724...@syzkaller.appspotmail.com
uvm_fault(0xfffffd807f00ccf0, 0xa, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xfffffd807f00ccf0, 0xa, 0, 1) -> e
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
end trace frame: 0xffff800020b5b810, count: 0
ddb{0}> trace
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
vio_rx_intr(ffff800000173050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1055
intr_handler(ffff800020b5b870,ffff80000024db00) at intr_handler+0x8f
sys/arch/amd64/amd64/intr.c:529
Xintr_ioapic_edge19_untramp(0,ffffffff811ccda0,0,18041969,a,0) at
Xintr_ioapic_edge19_untramp+0x19f
Xspllower(0,0,9a185cab0aaf5584,1,ffffffff826312a8,fffffd8066d2e638) at
Xspllower+0x19
pool_get() at pool_get+0x15d sys/kern/subr_pool.c:587
uvm_mapent_alloc(fffffd807f00c170,0) at uvm_mapent_alloc+0x2d2
sys/uvm/uvm_map.c:1735
uvm_map_mkentry(fffffd807f00c170,fffffd8066d2e050,fffffd8066d2e050,d16ce083000,68000,0)
at
uvm_map_mkentry+0x75 sys/uvm/uvm_map.c:1640
uvm_mapent_clone(fffffd807f00c170,d16ce083000,68000,0,5,7) at
uvm_mapent_clone+0x9e sys/uvm/uvm_map.c:3707
uvm_mapent_forkcopy(1,fffffd807f00c170,fffffd807f00ccf0,fffffd806b18a8b8,ffff800020b5bca0)
at
uvm_mapent_forkcopy+0x6a sys/uvm/uvm_map.c:3809
uvmspace_fork(ffff800020add500) at uvmspace_fork+0x229
process_new(ffff800020ab0290,ffff800020add500,1) at process_new+0x19a
sys/kern/kern_fork.c:276
fork1() at fork1+0x3ce sys/kern/kern_fork.c:398
syscall(ffff800020b5bf10) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b5bf10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,2,0,2,0,7f7ffffde564) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffde530, count: -15
ddb{0}> show registers
rdi 0xc
rsi 0xc
rbp 0xffff800020b5b7b0
rbx 0xffff800000173000
rdx 0
rcx 0xffffffff824a2ff0 cpu_info_full_primary+0x1ff0
rax 0xffffffff824a2ff0 cpu_info_full_primary+0x1ff0
r8 0x2
r9 0
r10 0xfc6f2abb7c6787c6
r11 0xbb8ab1550c0a7002
r12 0xffff80000001ce00
r13 0xc
r14 0xfffffd8067523d00
r15 0
rip 0xffffffff81dbe4f1 vio_rxeof+0x191
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800020b5b720
ss 0x10
vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}> show proc
PROC (syz-executor.0) pid=359015 stat=onproc
flags process=2<EXEC> proc=0
pri=70, usrpri=70, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab18c8,0xffff800020ab0c80
process=0xffff800020add500 user=0xffff800020b56000,
vmspace=0xfffffd807f00ccf0
estcpu=36, cpticks=0, pctcpu=0.4
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
48486 246156 23014 0 3 0x2 biowait syz-executor.1
* 1066 359015 23014 0 7 0x2 syz-executor.0
23014 275862 71906 0 3 0x82 thrsleep syz-fuzzer
23014 108691 71906 0 3 0x4000082 nanosleep syz-fuzzer
23014 401476 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 209768 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 52186 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 91475 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 227651 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 212146 71906 0 3 0x4000082 kqread syz-fuzzer
23014 241056 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 139681 71906 0 3 0x4000082 nanosleep syz-fuzzer
71906 390786 20499 0 3 0x10008a pause ksh
20499 125581 77556 0 3 0x92 select sshd
23896 31394 1 0 3 0x100083 ttyin getty
77556 238321 1 0 3 0x80 select sshd
77559 57235 87587 74 3 0x100092 bpf pflogd
87587 395682 1 0 3 0x80 netio pflogd
33292 518020 26703 73 3 0x100090 kqread syslogd
26703 109492 1 0 3 0x100082 netio syslogd
37370 334384 1 77 3 0x100090 poll dhclient
68760 17402 1 0 3 0x80 poll dhclient
66011 170513 0 0 3 0x14200 pgzero zerothread
55456 121020 0 0 3 0x14200 aiodoned aiodoned
48989 476882 0 0 3 0x14200 syncer update
21187 203620 0 0 3 0x14200 cleaner cleaner
1275 517315 0 0 3 0x14200 reaper reaper
33604 64476 0 0 3 0x14200 pgdaemon pagedaemon
39265 399416 0 0 3 0x14200 bored crynlk
21674 199384 0 0 3 0x14200 bored crypto
90311 105221 0 0 3 0x40014200 acpi0 acpi0
34424 307899 0 0 7 0x40014200 idle1
23572 460599 0 0 3 0x14200 bored softnet
79114 466994 0 0 3 0x14200 bored systqmp
52941 264621 0 0 3 0x14200 bored systq
45543 26423 0 0 3 0x40014200 bored softclock
73544 74800 0 0 3 0x40014200 idle0
69744 283579 0 0 3 0x14200 bored smr
1 503245 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 48486 (syz-executor.1) thread 0xffff800020ab0c70 (246156)
exclusive rrwlock inode r = 0 (0xfffffd806d91bf88)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ac6f2b8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 1066 (syz-executor.0) thread 0xffff800020ab13d8 (359015)
exclusive rwlock vmmaplk r = 0 (0xfffffd807f00c188)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5339
#3 uvmspace_fork+0x112 sys/uvm/uvm_map.c:4002
#4 process_new+0x19a sys/kern/kern_fork.c:276
#5 fork1+0x3ce sys/kern/kern_fork.c:398
#6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd807f00cd08)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5339
#3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:3993
#4 process_new+0x19a sys/kern/kern_fork.c:276
#5 fork1+0x3ce sys/kern/kern_fork.c:398
#6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#7 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 2 (0xffffffff82623840)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9514 6907K 8135K 78643K 11127 0 0
pcb 13 8K 8K 78643K 57 0 0
rtable 99 3K 3K 78643K 207 0 0
ifaddr 43 11K 11K 78643K 45 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1519 0 0
iov 0 0K 8K 78643K 6 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1245 78K 78K 78643K 1357 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 3 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 0K 78643K 14 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 5 13K 25K 78643K 132 0 0
proc 59 63K 95K 78643K 428 0 0
subproc 32 2K 2K 78643K 34 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 23 0 0
in_multi 33 2K 2K 78643K 33 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 42 185K 185K 78643K 42 0 0
exec 0 0K 1K 78643K 214 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 102 21K 22K 78643K 1301 0 0
UVM aobj 10 2K 2K 78643K 10 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 7 0K 0K 78643K 11 0 0
temp 137 3554K 3621K 78643K 3865 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 6 0 1 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 31 0 29 1 0 1 1 0
8 0
rtentry 112 45 0 4 2 0 2 2 0
8 0
unpcb 120 185 0 175 1 0 1 1 0
8 0
syncache 264 4 0 4 1 1 0 1 0
8 0
tcpqe 32 6029 0 6029 1 1 0 1 0
8 0
tcpcb 544 25 0 21 1 0 1 1 0
8 0
inpcb 280 234 0 227 2 0 2 2 0
8 1
nd6 48 4 0 0 1 0 1 1 0
8 0
pfosfp 40 846 0 423 5 0 5 5 0
8 0
pfosfpen 112 1428 0 714 21 0 21 21 0
8 0
pfstitem 24 22 0 3 1 0 1 1 0
8 0
pfstkey 112 22 0 3 1 0 1 1 0
8 0
pfstate 328 22 0 2 2 0 2 2 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 1 0 0 1 0 1 1 0
8 0
art_heap4 256 213 0 2 14 0 14 14 0
8 0
art_table 32 214 0 2 2 0 2 2 0
8 0
art_node 16 44 0 7 1 0 1 1 0
8 0
semapl 112 12 0 2 1 0 1 1 0
8 0
shmpl 112 8 0 0 1 0 1 1 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1544 0 138 46 0 46 46 0
8 0
ffsino 272 1544 0 138 94 0 94 94 0
8 0
nchpl 144 1906 0 287 61 0 61 61 0
8 0
uvmvnodes 72 1716 0 0 32 0 32 32 0
8 0
vnodes 208 1716 0 0 91 0 91 91 0
8 0
namei 1024 5042 0 5042 3 2 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 5220 0 5219 10 9 1 7 0
8 0
plimitpl 152 18 0 10 1 0 1 1 0
8 0
sigapl 432 332 0 317 3 1 2 3 0
8 0
futexpl 56 1941 0 1941 1 0 1 1 0
8 1
knotepl 112 106 0 87 2 0 2 2 0
8 1
kqueuepl 104 19 0 17 1 0 1 1 0
8 0
pipepl 112 174 0 155 2 1 1 1 0
8 0
fdescpl 488 333 0 317 3 0 3 3 0
8 0
filepl 152 1940 0 1840 7 1 6 6 0
8 2
lockfpl 104 27 0 26 1 0 1 1 0
8 0
lockfspl 48 10 0 9 1 0 1 1 0
8 0
sessionpl 112 18 0 7 1 0 1 1 0
8 0
pgrppl 48 18 0 7 1 0 1 1 0
8 0
ucredpl 96 90 0 81 1 0 1 1 0
8 0
zombiepl 144 317 0 317 3 2 1 1 0
8 1
processpl 896 348 0 317 4 0 4 4 0
8 0
procpl 632 543 0 503 4 0 4 4 0
8 0
sockpl 384 452 0 433 6 1 5 5 0
8 3
mcl64k 65536 2 0 0 1 0 1 1 0
8 0
mcl16k 16384 1 0 0 1 0 1 1 0
8 0
mcl12k 12288 1 0 0 1 0 1 1 0
8 0
mcl8k 8192 2 0 0 1 0 1 1 0
8 0
mcl4k 4096 7 0 0 1 0 1 1 0
8 0
mcl2k2 2112 2 0 0 1 0 1 1 0
8 0
mcl2k 2048 124 0 0 15 0 15 15 0
8 0
mtagpl 80 8 0 0 1 0 1 1 0
8 0
mbufpl 256 181 0 0 11 1 10 10 0
8 0
bufpl 256 6304 0 1315 312 0 312 312 0
8 0
anonpl 16 42224 0 28097 60 2 58 58 0
124 0
amapchunkpl 152 1448 0 1339 8 2 6 7 0
158 0
amappl16 192 1305 0 528 40 0 40 40 0
8 0
amappl15 184 4 0 3 1 0 1 1 0
8 0
amappl14 176 84 0 82 2 1 1 1 0
8 0
amappl12 160 14 0 12 2 1 1 1 0
8 0
amappl11 152 58 0 43 1 0 1 1 0
8 0
amappl10 144 57 0 51 1 0 1 1 0
8 0
amappl9 136 618 0 612 1 0 1 1 0
8 0
amappl8 128 176 0 151 2 1 1 2 0
8 0
amappl7 120 77 0 74 1 0 1 1 0
8 0
amappl6 112 75 0 64 1 0 1 1 0
8 0
amappl5 104 131 0 117 1 0 1 1 0
8 0
amappl4 96 586 0 554 1 0 1 1 0
8 0
amappl3 88 166 0 160 1 0 1 1 0
8 0
amappl2 80 1717 0 1653 4 2 2 3 0
8 0
amappl1 72 17234 0 16809 26 16 10 20 0
8 0
amappl 80 791 0 754 1 0 1 1 0
84 0
dma4096 4096 1 0 1 1 1 0 1 0
8 0
dma256 256 6 0 6 1 1 0 1 0
8 0
dma64 64 259 0 259 1 1 0 1 0
8 0
dma32 32 7 0 7 1 1 0 1 0
8 0
dma16 16 17 0 17 1 1 0 1 0
8 0
aobjpl 64 9 0 0 1 0 1 1 0
8 0
uaddrrnd 24 333 0 317 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 333 0 317 1 0 1 1 0
8 0
vmmpekpl 168 6400 0 6370 2 0 2 2 0
8 0
vmmpepl 168 47223 0 45415 140 30 110 111 0 357
27
vmsppl 368 332 0 317 2 0 2 2 0
8 0
pdppl 4096 673 0 634 7 1 6 6 0
8 1
pvpl 32 149794 0 132615 165 24 141 141 0
265 0
pmappl 232 332 0 317 2 1 1 2 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 471 0 7 14 0 14 14 0
8 0
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: dd27a176 Let snmpd's regress test make use of our very own..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16bbd565600000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=6cc72412d8ddcf87f8a1
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+6cc724...@syzkaller.appspotmail.com
uvm_fault(0xfffffd807f00ccf0, 0xa, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xfffffd807f00ccf0, 0xa, 0, 1) -> e
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
end trace frame: 0xffff800020b5b810, count: 0
ddb{0}> trace
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
vio_rx_intr(ffff800000173050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1055
intr_handler(ffff800020b5b870,ffff80000024db00) at intr_handler+0x8f
sys/arch/amd64/amd64/intr.c:529
Xintr_ioapic_edge19_untramp(0,ffffffff811ccda0,0,18041969,a,0) at
Xintr_ioapic_edge19_untramp+0x19f
Xspllower(0,0,9a185cab0aaf5584,1,ffffffff826312a8,fffffd8066d2e638) at
Xspllower+0x19
pool_get() at pool_get+0x15d sys/kern/subr_pool.c:587
uvm_mapent_alloc(fffffd807f00c170,0) at uvm_mapent_alloc+0x2d2
sys/uvm/uvm_map.c:1735
uvm_map_mkentry(fffffd807f00c170,fffffd8066d2e050,fffffd8066d2e050,d16ce083000,68000,0)
at
uvm_map_mkentry+0x75 sys/uvm/uvm_map.c:1640
uvm_mapent_clone(fffffd807f00c170,d16ce083000,68000,0,5,7) at
uvm_mapent_clone+0x9e sys/uvm/uvm_map.c:3707
uvm_mapent_forkcopy(1,fffffd807f00c170,fffffd807f00ccf0,fffffd806b18a8b8,ffff800020b5bca0)
at
uvm_mapent_forkcopy+0x6a sys/uvm/uvm_map.c:3809
uvmspace_fork(ffff800020add500) at uvmspace_fork+0x229
process_new(ffff800020ab0290,ffff800020add500,1) at process_new+0x19a
sys/kern/kern_fork.c:276
fork1() at fork1+0x3ce sys/kern/kern_fork.c:398
syscall(ffff800020b5bf10) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b5bf10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,2,0,2,0,7f7ffffde564) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffde530, count: -15
ddb{0}> show registers
rdi 0xc
rsi 0xc
rbp 0xffff800020b5b7b0
rbx 0xffff800000173000
rdx 0
rcx 0xffffffff824a2ff0 cpu_info_full_primary+0x1ff0
rax 0xffffffff824a2ff0 cpu_info_full_primary+0x1ff0
r8 0x2
r9 0
r10 0xfc6f2abb7c6787c6
r11 0xbb8ab1550c0a7002
r12 0xffff80000001ce00
r13 0xc
r14 0xfffffd8067523d00
r15 0
rip 0xffffffff81dbe4f1 vio_rxeof+0x191
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800020b5b720
ss 0x10
vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}> show proc
PROC (syz-executor.0) pid=359015 stat=onproc
flags process=2<EXEC> proc=0
pri=70, usrpri=70, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab18c8,0xffff800020ab0c80
process=0xffff800020add500 user=0xffff800020b56000,
vmspace=0xfffffd807f00ccf0
estcpu=36, cpticks=0, pctcpu=0.4
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
48486 246156 23014 0 3 0x2 biowait syz-executor.1
* 1066 359015 23014 0 7 0x2 syz-executor.0
23014 275862 71906 0 3 0x82 thrsleep syz-fuzzer
23014 108691 71906 0 3 0x4000082 nanosleep syz-fuzzer
23014 401476 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 209768 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 52186 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 91475 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 227651 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 212146 71906 0 3 0x4000082 kqread syz-fuzzer
23014 241056 71906 0 3 0x4000082 thrsleep syz-fuzzer
23014 139681 71906 0 3 0x4000082 nanosleep syz-fuzzer
71906 390786 20499 0 3 0x10008a pause ksh
20499 125581 77556 0 3 0x92 select sshd
23896 31394 1 0 3 0x100083 ttyin getty
77556 238321 1 0 3 0x80 select sshd
77559 57235 87587 74 3 0x100092 bpf pflogd
87587 395682 1 0 3 0x80 netio pflogd
33292 518020 26703 73 3 0x100090 kqread syslogd
26703 109492 1 0 3 0x100082 netio syslogd
37370 334384 1 77 3 0x100090 poll dhclient
68760 17402 1 0 3 0x80 poll dhclient
66011 170513 0 0 3 0x14200 pgzero zerothread
55456 121020 0 0 3 0x14200 aiodoned aiodoned
48989 476882 0 0 3 0x14200 syncer update
21187 203620 0 0 3 0x14200 cleaner cleaner
1275 517315 0 0 3 0x14200 reaper reaper
33604 64476 0 0 3 0x14200 pgdaemon pagedaemon
39265 399416 0 0 3 0x14200 bored crynlk
21674 199384 0 0 3 0x14200 bored crypto
90311 105221 0 0 3 0x40014200 acpi0 acpi0
34424 307899 0 0 7 0x40014200 idle1
23572 460599 0 0 3 0x14200 bored softnet
79114 466994 0 0 3 0x14200 bored systqmp
52941 264621 0 0 3 0x14200 bored systq
45543 26423 0 0 3 0x40014200 bored softclock
73544 74800 0 0 3 0x40014200 idle0
69744 283579 0 0 3 0x14200 bored smr
1 503245 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 48486 (syz-executor.1) thread 0xffff800020ab0c70 (246156)
exclusive rrwlock inode r = 0 (0xfffffd806d91bf88)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323
#8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ac6f2b8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 1066 (syz-executor.0) thread 0xffff800020ab13d8 (359015)
exclusive rwlock vmmaplk r = 0 (0xfffffd807f00c188)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5339
#3 uvmspace_fork+0x112 sys/uvm/uvm_map.c:4002
#4 process_new+0x19a sys/kern/kern_fork.c:276
#5 fork1+0x3ce sys/kern/kern_fork.c:398
#6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd807f00cd08)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5339
#3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:3993
#4 process_new+0x19a sys/kern/kern_fork.c:276
#5 fork1+0x3ce sys/kern/kern_fork.c:398
#6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#7 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 2 (0xffffffff82623840)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9514 6907K 8135K 78643K 11127 0 0
pcb 13 8K 8K 78643K 57 0 0
rtable 99 3K 3K 78643K 207 0 0
ifaddr 43 11K 11K 78643K 45 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1519 0 0
iov 0 0K 8K 78643K 6 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1245 78K 78K 78643K 1357 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 3 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 0K 78643K 14 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 5 13K 25K 78643K 132 0 0
proc 59 63K 95K 78643K 428 0 0
subproc 32 2K 2K 78643K 34 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 23 0 0
in_multi 33 2K 2K 78643K 33 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 42 185K 185K 78643K 42 0 0
exec 0 0K 1K 78643K 214 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 102 21K 22K 78643K 1301 0 0
UVM aobj 10 2K 2K 78643K 10 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 7 0K 0K 78643K 11 0 0
temp 137 3554K 3621K 78643K 3865 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 6 0 1 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 31 0 29 1 0 1 1 0
8 0
rtentry 112 45 0 4 2 0 2 2 0
8 0
unpcb 120 185 0 175 1 0 1 1 0
8 0
syncache 264 4 0 4 1 1 0 1 0
8 0
tcpqe 32 6029 0 6029 1 1 0 1 0
8 0
tcpcb 544 25 0 21 1 0 1 1 0
8 0
inpcb 280 234 0 227 2 0 2 2 0
8 1
nd6 48 4 0 0 1 0 1 1 0
8 0
pfosfp 40 846 0 423 5 0 5 5 0
8 0
pfosfpen 112 1428 0 714 21 0 21 21 0
8 0
pfstitem 24 22 0 3 1 0 1 1 0
8 0
pfstkey 112 22 0 3 1 0 1 1 0
8 0
pfstate 328 22 0 2 2 0 2 2 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 1 0 0 1 0 1 1 0
8 0
art_heap4 256 213 0 2 14 0 14 14 0
8 0
art_table 32 214 0 2 2 0 2 2 0
8 0
art_node 16 44 0 7 1 0 1 1 0
8 0
semapl 112 12 0 2 1 0 1 1 0
8 0
shmpl 112 8 0 0 1 0 1 1 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1544 0 138 46 0 46 46 0
8 0
ffsino 272 1544 0 138 94 0 94 94 0
8 0
nchpl 144 1906 0 287 61 0 61 61 0
8 0
uvmvnodes 72 1716 0 0 32 0 32 32 0
8 0
vnodes 208 1716 0 0 91 0 91 91 0
8 0
namei 1024 5042 0 5042 3 2 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 5220 0 5219 10 9 1 7 0
8 0
plimitpl 152 18 0 10 1 0 1 1 0
8 0
sigapl 432 332 0 317 3 1 2 3 0
8 0
futexpl 56 1941 0 1941 1 0 1 1 0
8 1
knotepl 112 106 0 87 2 0 2 2 0
8 1
kqueuepl 104 19 0 17 1 0 1 1 0
8 0
pipepl 112 174 0 155 2 1 1 1 0
8 0
fdescpl 488 333 0 317 3 0 3 3 0
8 0
filepl 152 1940 0 1840 7 1 6 6 0
8 2
lockfpl 104 27 0 26 1 0 1 1 0
8 0
lockfspl 48 10 0 9 1 0 1 1 0
8 0
sessionpl 112 18 0 7 1 0 1 1 0
8 0
pgrppl 48 18 0 7 1 0 1 1 0
8 0
ucredpl 96 90 0 81 1 0 1 1 0
8 0
zombiepl 144 317 0 317 3 2 1 1 0
8 1
processpl 896 348 0 317 4 0 4 4 0
8 0
procpl 632 543 0 503 4 0 4 4 0
8 0
sockpl 384 452 0 433 6 1 5 5 0
8 3
mcl64k 65536 2 0 0 1 0 1 1 0
8 0
mcl16k 16384 1 0 0 1 0 1 1 0
8 0
mcl12k 12288 1 0 0 1 0 1 1 0
8 0
mcl8k 8192 2 0 0 1 0 1 1 0
8 0
mcl4k 4096 7 0 0 1 0 1 1 0
8 0
mcl2k2 2112 2 0 0 1 0 1 1 0
8 0
mcl2k 2048 124 0 0 15 0 15 15 0
8 0
mtagpl 80 8 0 0 1 0 1 1 0
8 0
mbufpl 256 181 0 0 11 1 10 10 0
8 0
bufpl 256 6304 0 1315 312 0 312 312 0
8 0
anonpl 16 42224 0 28097 60 2 58 58 0
124 0
amapchunkpl 152 1448 0 1339 8 2 6 7 0
158 0
amappl16 192 1305 0 528 40 0 40 40 0
8 0
amappl15 184 4 0 3 1 0 1 1 0
8 0
amappl14 176 84 0 82 2 1 1 1 0
8 0
amappl12 160 14 0 12 2 1 1 1 0
8 0
amappl11 152 58 0 43 1 0 1 1 0
8 0
amappl10 144 57 0 51 1 0 1 1 0
8 0
amappl9 136 618 0 612 1 0 1 1 0
8 0
amappl8 128 176 0 151 2 1 1 2 0
8 0
amappl7 120 77 0 74 1 0 1 1 0
8 0
amappl6 112 75 0 64 1 0 1 1 0
8 0
amappl5 104 131 0 117 1 0 1 1 0
8 0
amappl4 96 586 0 554 1 0 1 1 0
8 0
amappl3 88 166 0 160 1 0 1 1 0
8 0
amappl2 80 1717 0 1653 4 2 2 3 0
8 0
amappl1 72 17234 0 16809 26 16 10 20 0
8 0
amappl 80 791 0 754 1 0 1 1 0
84 0
dma4096 4096 1 0 1 1 1 0 1 0
8 0
dma256 256 6 0 6 1 1 0 1 0
8 0
dma64 64 259 0 259 1 1 0 1 0
8 0
dma32 32 7 0 7 1 1 0 1 0
8 0
dma16 16 17 0 17 1 1 0 1 0
8 0
aobjpl 64 9 0 0 1 0 1 1 0
8 0
uaddrrnd 24 333 0 317 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 333 0 317 1 0 1 1 0
8 0
vmmpekpl 168 6400 0 6370 2 0 2 2 0
8 0
vmmpepl 168 47223 0 45415 140 30 110 111 0 357
27
vmsppl 368 332 0 317 2 0 2 2 0
8 0
pdppl 4096 673 0 634 7 1 6 6 0
8 1
pvpl 32 149794 0 132615 165 24 141 141 0
265 0
pmappl 232 332 0 317 2 1 1 2 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 471 0 7 14 0 14 14 0
8 0
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Oct 13, 2019, 6:20:08 AM10/13/19
to syzkaller-o...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: 1701c8fa renable POOL_DEBUG
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1740fa30e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+6cc724...@syzkaller.appspotmail.com
uvm_fault(0xffffffff826443a0, 0xa, 0, 1) -> e
sys/arch/amd64/amd64/intr.c:529
Xintr_ioapic_edge19_untramp(0,ffffffff81fd3940,0,18041969,a,0) at
Xintr_ioapic_edge19_untramp+0x19f
Xspllower(0,0,3c16da030c49ff3f,0,ffffffff8263fc40,caa8914000) at
Xspllower+0x19
pool_put(ffffffff8263fc40,fffffd806ccbed70) at pool_put+0x201
sys/kern/subr_pool.c:815
pmap_do_remove(fffffd807f00a0e8,caa88f3000,caa8914000,0) at
pmap_do_remove+0x61b sys/arch/amd64/amd64/pmap.c:1798
uvm_map_teardown(fffffd807f00b730) at uvm_map_teardown+0x195
uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:206 [inline]
uvm_map_teardown(fffffd807f00b730) at uvm_map_teardown+0x195
sys/uvm/uvm_map.c:2715
uvmspace_free(fffffd807f00b730) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3588
uvm_exit(ffff800020adc380) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297
reaper(ffff800020a5fb30) at reaper+0x189 sys/kern/kern_exit.c:442
end trace frame: 0x0, count: -11
rbx 0xffff800000173000
rdx 0
rcx 0xffff8000001a4000
rax 0xc
r8 0x2
r9 0
r10 0xa74d26d842d72d24
r11 0x39a7edcf6a9add45
r12 0xffff80000001ce00
r13 0xc
r14 0xfffffd807dc21d00
r15 0
rip 0xffffffff81398251 vio_rxeof+0x191
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020a11638,0xffff800020a5f3d8
process=0xffff800020a4a708 user=0xffff800020a58000,
vmspace=0xffffffff826443a0
estcpu=1, cpticks=7, pctcpu=0.2
user=0, sys=0, intr=1
67851 70341 47142 0 3 0x82 kqread syz-execprog
67851 216455 47142 0 3 0x4000082 nanosleep syz-execprog
67851 53393 47142 0 3 0x4000082 thrsleep syz-execprog
67851 187303 47142 0 3 0x4000082 thrsleep syz-execprog
67851 286927 47142 0 3 0x4000082 thrsleep syz-execprog
67851 354430 47142 0 3 0x4000082 thrsleep syz-execprog
67851 249194 47142 0 3 0x4000082 thrsleep syz-execprog
67851 209481 47142 0 3 0x4000082 thrsleep syz-execprog
67851 94862 47142 0 3 0x4000082 thrsleep syz-execprog
47142 261045 453 0 3 0x10008a pause ksh
453 318790 41950 0 3 0x92 select sshd
35528 323571 1 0 3 0x100083 ttyin getty
41950 209241 1 0 3 0x80 select sshd
71354 261824 95205 74 3 0x100092 bpf pflogd
95205 414815 1 0 3 0x80 netio pflogd
26626 58912 76978 73 3 0x100090 kqread syslogd
76978 160333 1 0 3 0x100082 netio syslogd
77709 507683 1 77 3 0x100090 poll dhclient
46502 115226 1 0 3 0x80 poll dhclient
16618 347024 0 0 3 0x14200 pgzero zerothread
56318 464074 0 0 3 0x14200 aiodoned aiodoned
99800 514299 0 0 3 0x14200 syncer update
14790 94592 0 0 3 0x14200 cleaner cleaner
*83251 470658 0 0 7 0x14200 reaper
50987 414940 0 0 3 0x14200 pgdaemon pagedaemon
75110 229737 0 0 3 0x14200 bored crynlk
43078 149564 0 0 3 0x14200 bored crypto
47844 284505 0 0 3 0x40014200 acpi0 acpi0
73120 119822 0 0 7 0x40014200 idle1
28863 279607 0 0 3 0x14200 bored softnet
95028 499044 0 0 3 0x14200 bored systqmp
61238 93651 0 0 3 0x14200 bored systq
27132 510899 0 0 3 0x40014200 bored softclock
78203 415270 0 0 3 0x40014200 idle0
58850 65363 0 0 3 0x14200 bored smr
1 53041 0 0 3 0x82 wait init
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff826329b0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 intr_handler+0x5e sys/arch/amd64/amd64/intr.c:525
#2 Xintr_ioapic_edge19_untramp+0x19f
#3 Xspllower+0x19
#4 pool_put+0x201 sys/kern/subr_pool.c:815
#5 pmap_do_remove+0x61b sys/arch/amd64/amd64/pmap.c:1798
#6 uvm_map_teardown+0x195 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:206
[inline]
#6 uvm_map_teardown+0x195 sys/uvm/uvm_map.c:2715
#7 uvmspace_free+0x86 sys/uvm/uvm_map.c:3588
#8 uvm_exit+0x29 sys/uvm/uvm_glue.c:297
#9 reaper+0x189 sys/kern/kern_exit.c:442
#10 proc_trampoline+0x1c
pcb 13 8K 8K 78643K 13 0 0
rtable 77 2K 2K 78643K 165 0 0
ifaddr 32 9K 9K 78643K 36 0 0
proc 59 63K 83K 78643K 384 0 0
exec 0 0K 1K 78643K 199 0 0
UVM aobj 2 2K 2K 78643K 2 0 0
temp 48 3542K 3606K 78643K 3342 0 0
8 0
rtentry 112 34 0 4 1 0 1 1 0
8 0
unpcb 120 29 0 19 1 0 1 1 0
8 0
syncache 264 5 0 5 2 1 1 1 0
8 1
tcpcb 544 8 0 5 1 0 1 1 0
8 0
inpcb 280 37 0 31 1 0 1 1 0
8 0
nd6 48 2 0 0 1 0 1 1 0
8 0
8 0
pfstkey 112 11 0 2 1 0 1 1 0
8 0
pfstate 328 11 0 2 1 0 1 1 0
8 0
8 0
art_table 32 169 0 2 2 0 2 2 0
8 0
art_node 16 33 0 6 1 0 1 1 0
8 0
ffsino 272 1425 0 23 94 0 94 94 0
8 0
nchpl 144 1667 0 56 60 0 60 60 0
8 0
uvmvnodes 72 1435 0 0 27 0 27 27 0
8 0
vnodes 208 1435 0 0 76 0 76 76 0
8 0
namei 1024 4154 0 4154 2 1 1 1 0
8 7
plimitpl 152 15 0 8 1 0 1 1 0
8 0
sigapl 432 229 0 216 2 0 2 2 0
8 0
knotepl 112 39 0 28 1 0 1 1 0
8 0
kqueuepl 104 2 0 0 1 0 1 1 0
8 0
pipepl 112 154 0 141 2 1 1 1 0
8 0
fdescpl 488 230 0 216 3 0 3 3 0
8 0
filepl 152 1127 0 1069 3 0 3 3 0
8 0
lockfpl 104 5 0 4 1 0 1 1 0
8 0
lockfspl 48 3 0 2 1 0 1 1 0
8 0
sessionpl 112 19 0 9 1 0 1 1 0
8 0
pgrppl 48 19 0 9 1 0 1 1 0
8 0
ucredpl 96 52 0 43 1 0 1 1 0
8 0
zombiepl 144 216 0 215 2 1 1 1 0
8 0
processpl 896 245 0 215 4 0 4 4 0
8 0
procpl 632 253 0 215 4 0 4 4 0
8 0
sockpl 384 83 0 65 2 0 2 2 0
8 0
mcl4k 4096 2 0 0 1 0 1 1 0
8 0
mcl2k 2048 76 0 0 10 0 10 10 0
8 0
mtagpl 80 1 0 0 1 0 1 1 0
8 0
mbufpl 256 114 0 0 6 0 6 6 0
8 0
bufpl 256 5889 0 1315 286 0 286 286 0
8 0
anonpl 16 22264 0 20636 15 2 13 13 0
124 6
amapchunkpl 152 768 0 702 5 0 5 5 0
158 1
amappl16 192 149 0 115 2 0 2 2 0
8 0
amappl14 176 27 0 23 2 1 1 1 0
8 0
amappl13 168 5 0 3 1 0 1 1 0
8 0
amappl12 160 11 0 9 2 1 1 1 0
8 0
amappl11 152 52 0 37 1 0 1 1 0
8 0
amappl10 144 16 0 13 1 0 1 1 0
8 0
amappl9 136 463 0 457 1 0 1 1 0
8 0
amappl8 128 128 0 118 1 0 1 1 0
8 0
amappl7 120 37 0 33 1 0 1 1 0
8 0
amappl6 112 77 0 67 1 0 1 1 0
8 0
amappl5 104 133 0 119 1 0 1 1 0
8 0
amappl4 96 499 0 470 1 0 1 1 0
8 0
amappl3 88 117 0 110 1 0 1 1 0
8 0
amappl2 80 967 0 904 4 1 3 3 0
8 1
amappl1 72 15185 0 14769 26 8 18 20 0
8 8
amappl 80 481 0 452 1 0 1 1 0
8 0
dma64 64 6 0 6 1 1 0 1 0
8 0
8 0
uaddrrnd 24 230 0 216 1 0 1 1 0
8 0
vmmpekpl 168 6436 0 6414 2 0 2 2 0
8 0
vmmpepl 168 32771 0 31813 95 15 80 80 0 357
38
vmsppl 368 229 0 215 2 0 2 2 0
8 0
pdppl 4096 467 0 430 6 0 6 6 0
8 1
pvpl 32 112771 0 108707 120 5 115 115 0 265
81
pmappl 232 229 0 215 1 0 1 1 0
8 0
8 0
ddb{0}>
HEAD commit: 1701c8fa renable POOL_DEBUG
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1740fa30e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=6cc72412d8ddcf87f8a1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=134196d7600000
dashboard link: https://syzkaller.appspot.com/bug?extid=6cc72412d8ddcf87f8a1
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+6cc724...@syzkaller.appspotmail.com
kernel: page fault trap, code=0
Stopped at vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xffffffff826443a0, 0xa, 0, 1) -> e
Stopped at vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
end trace frame: 0xffff800020a5d210, count: 0
ddb{0}> trace
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
vio_rx_intr(ffff800000173050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1055
intr_handler(ffff800020a5d270,ffff80000024db00) at intr_handler+0x8f
vio_rxeof(ffff800000173000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018
vio_rx_intr(ffff800000173050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1055
sys/arch/amd64/amd64/intr.c:529
Xintr_ioapic_edge19_untramp(0,ffffffff81fd3940,0,18041969,a,0) at
Xintr_ioapic_edge19_untramp+0x19f
Xspllower(0,0,3c16da030c49ff3f,0,ffffffff8263fc40,caa8914000) at
Xspllower+0x19
pool_put(ffffffff8263fc40,fffffd806ccbed70) at pool_put+0x201
sys/kern/subr_pool.c:815
pmap_do_remove(fffffd807f00a0e8,caa88f3000,caa8914000,0) at
pmap_do_remove+0x61b sys/arch/amd64/amd64/pmap.c:1798
uvm_map_teardown(fffffd807f00b730) at uvm_map_teardown+0x195
uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:206 [inline]
uvm_map_teardown(fffffd807f00b730) at uvm_map_teardown+0x195
sys/uvm/uvm_map.c:2715
uvmspace_free(fffffd807f00b730) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3588
uvm_exit(ffff800020adc380) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297
reaper(ffff800020a5fb30) at reaper+0x189 sys/kern/kern_exit.c:442
end trace frame: 0x0, count: -11
ddb{0}> show registers
rdi 0xc
rsi 0xc
rbp 0xffff800020a5d1b0
rdi 0xc
rsi 0xc
rbx 0xffff800000173000
rdx 0
rcx 0xffff8000001a4000
rax 0xc
r8 0x2
r9 0
r10 0xa74d26d842d72d24
r11 0x39a7edcf6a9add45
r12 0xffff80000001ce00
r13 0xc
r14 0xfffffd807dc21d00
r15 0
rip 0xffffffff81398251 vio_rxeof+0x191
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800020a5d120
rflags 0x10246 __ALIGN_SIZE+0xf246
ss 0x10
vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}> show proc
PROC (reaper) pid=470658 stat=onproc
vio_rxeof+0x191: movzwl 0xa(%r15),%eax
ddb{0}> show proc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020a11638,0xffff800020a5f3d8
process=0xffff800020a4a708 user=0xffff800020a58000,
vmspace=0xffffffff826443a0
estcpu=1, cpticks=7, pctcpu=0.2
user=0, sys=0, intr=1
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
89076 293633 67851 0 3 0x82 nanosleep syz-executor.0
PID TID PPID UID S FLAGS WAIT COMMAND
67851 70341 47142 0 3 0x82 kqread syz-execprog
67851 216455 47142 0 3 0x4000082 nanosleep syz-execprog
67851 53393 47142 0 3 0x4000082 thrsleep syz-execprog
67851 187303 47142 0 3 0x4000082 thrsleep syz-execprog
67851 286927 47142 0 3 0x4000082 thrsleep syz-execprog
67851 354430 47142 0 3 0x4000082 thrsleep syz-execprog
67851 249194 47142 0 3 0x4000082 thrsleep syz-execprog
67851 209481 47142 0 3 0x4000082 thrsleep syz-execprog
67851 94862 47142 0 3 0x4000082 thrsleep syz-execprog
47142 261045 453 0 3 0x10008a pause ksh
453 318790 41950 0 3 0x92 select sshd
35528 323571 1 0 3 0x100083 ttyin getty
41950 209241 1 0 3 0x80 select sshd
71354 261824 95205 74 3 0x100092 bpf pflogd
95205 414815 1 0 3 0x80 netio pflogd
26626 58912 76978 73 3 0x100090 kqread syslogd
76978 160333 1 0 3 0x100082 netio syslogd
77709 507683 1 77 3 0x100090 poll dhclient
46502 115226 1 0 3 0x80 poll dhclient
16618 347024 0 0 3 0x14200 pgzero zerothread
56318 464074 0 0 3 0x14200 aiodoned aiodoned
99800 514299 0 0 3 0x14200 syncer update
14790 94592 0 0 3 0x14200 cleaner cleaner
*83251 470658 0 0 7 0x14200 reaper
50987 414940 0 0 3 0x14200 pgdaemon pagedaemon
75110 229737 0 0 3 0x14200 bored crynlk
43078 149564 0 0 3 0x14200 bored crypto
47844 284505 0 0 3 0x40014200 acpi0 acpi0
73120 119822 0 0 7 0x40014200 idle1
28863 279607 0 0 3 0x14200 bored softnet
95028 499044 0 0 3 0x14200 bored systqmp
61238 93651 0 0 3 0x14200 bored systq
27132 510899 0 0 3 0x40014200 bored softclock
78203 415270 0 0 3 0x40014200 idle0
58850 65363 0 0 3 0x14200 bored smr
1 53041 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 83251 (reaper) thread 0xffff800020a5fb30 (470658)
ddb{0}> show all locks
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff826329b0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 intr_handler+0x5e sys/arch/amd64/amd64/intr.c:525
#2 Xintr_ioapic_edge19_untramp+0x19f
#3 Xspllower+0x19
#4 pool_put+0x201 sys/kern/subr_pool.c:815
#5 pmap_do_remove+0x61b sys/arch/amd64/amd64/pmap.c:1798
#6 uvm_map_teardown+0x195 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:206
[inline]
#6 uvm_map_teardown+0x195 sys/uvm/uvm_map.c:2715
#7 uvmspace_free+0x86 sys/uvm/uvm_map.c:3588
#8 uvm_exit+0x29 sys/uvm/uvm_glue.c:297
#9 reaper+0x189 sys/kern/kern_exit.c:442
#10 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9457 6385K 6385K 78643K 10544 0 0
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
pcb 13 8K 8K 78643K 13 0 0
rtable 77 2K 2K 78643K 165 0 0
ifaddr 32 9K 9K 78643K 36 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1468 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1181 74K 74K 78643K 1186 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 1K 78643K 2 0 0
UFS mount 5 36K 36K 78643K 5 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 2 0K 0K 78643K 2 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 2 4K 12K 78643K 21 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
proc 59 63K 83K 78643K 384 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
in_multi 22 1K 1K 78643K 22 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 18 79K 79K 78643K 18 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
exec 0 0K 1K 78643K 199 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 74 12K 12K 78643K 961 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM aobj 2 2K 2K 78643K 2 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 7 0K 0K 78643K 7 0 0
crypto data 1 1K 1K 78643K 1 0 0
temp 48 3542K 3606K 78643K 3342 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 4 0 1 1 0 1 1 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 17 0 15 1 0 1 1 0
plcache 128 20 0 0 1 0 1 1 0
8 0
8 0
rtentry 112 34 0 4 1 0 1 1 0
8 0
unpcb 120 29 0 19 1 0 1 1 0
8 0
syncache 264 5 0 5 2 1 1 1 0
8 1
tcpcb 544 8 0 5 1 0 1 1 0
8 0
inpcb 280 37 0 31 1 0 1 1 0
8 0
nd6 48 2 0 0 1 0 1 1 0
8 0
pfosfp 40 846 0 423 5 0 5 5 0
8 0
pfosfpen 112 1428 0 714 21 0 21 21 0
8 0
pfstitem 24 11 0 2 1 0 1 1 0
8 0
pfosfpen 112 1428 0 714 21 0 21 21 0
8 0
8 0
pfstkey 112 11 0 2 1 0 1 1 0
8 0
pfstate 328 11 0 2 1 0 1 1 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 1 0 0 1 0 1 1 0
8 0
art_heap4 256 168 0 2 11 0 11 11 0
8 0
art_heap8 4096 1 0 0 1 0 1 1 0
8 0
8 0
art_table 32 169 0 2 2 0 2 2 0
8 0
art_node 16 33 0 6 1 0 1 1 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1425 0 23 46 0 46 46 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
8 0
ffsino 272 1425 0 23 94 0 94 94 0
8 0
nchpl 144 1667 0 56 60 0 60 60 0
8 0
uvmvnodes 72 1435 0 0 27 0 27 27 0
8 0
vnodes 208 1435 0 0 76 0 76 76 0
8 0
namei 1024 4154 0 4154 2 1 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 4248 0 4248 9 2 7 7 0
percpumem 16 30 0 0 1 0 1 1 0
8 0
8 7
plimitpl 152 15 0 8 1 0 1 1 0
8 0
sigapl 432 229 0 216 2 0 2 2 0
8 0
knotepl 112 39 0 28 1 0 1 1 0
8 0
kqueuepl 104 2 0 0 1 0 1 1 0
8 0
pipepl 112 154 0 141 2 1 1 1 0
8 0
fdescpl 488 230 0 216 3 0 3 3 0
8 0
filepl 152 1127 0 1069 3 0 3 3 0
8 0
lockfpl 104 5 0 4 1 0 1 1 0
8 0
lockfspl 48 3 0 2 1 0 1 1 0
8 0
sessionpl 112 19 0 9 1 0 1 1 0
8 0
pgrppl 48 19 0 9 1 0 1 1 0
8 0
ucredpl 96 52 0 43 1 0 1 1 0
8 0
zombiepl 144 216 0 215 2 1 1 1 0
8 0
processpl 896 245 0 215 4 0 4 4 0
8 0
procpl 632 253 0 215 4 0 4 4 0
8 0
sockpl 384 83 0 65 2 0 2 2 0
8 0
mcl4k 4096 2 0 0 1 0 1 1 0
8 0
mcl2k 2048 76 0 0 10 0 10 10 0
8 0
mtagpl 80 1 0 0 1 0 1 1 0
8 0
mbufpl 256 114 0 0 6 0 6 6 0
8 0
bufpl 256 5889 0 1315 286 0 286 286 0
8 0
anonpl 16 22264 0 20636 15 2 13 13 0
124 6
amapchunkpl 152 768 0 702 5 0 5 5 0
158 1
amappl16 192 149 0 115 2 0 2 2 0
8 0
amappl14 176 27 0 23 2 1 1 1 0
8 0
amappl13 168 5 0 3 1 0 1 1 0
8 0
amappl12 160 11 0 9 2 1 1 1 0
8 0
amappl11 152 52 0 37 1 0 1 1 0
8 0
amappl10 144 16 0 13 1 0 1 1 0
8 0
amappl9 136 463 0 457 1 0 1 1 0
8 0
amappl8 128 128 0 118 1 0 1 1 0
8 0
amappl7 120 37 0 33 1 0 1 1 0
8 0
amappl6 112 77 0 67 1 0 1 1 0
8 0
amappl5 104 133 0 119 1 0 1 1 0
8 0
amappl4 96 499 0 470 1 0 1 1 0
8 0
amappl3 88 117 0 110 1 0 1 1 0
8 0
amappl2 80 967 0 904 4 1 3 3 0
8 1
amappl1 72 15185 0 14769 26 8 18 20 0
8 8
amappl 80 481 0 452 1 0 1 1 0
84 0
dma4096 4096 1 0 1 1 1 0 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
dma4096 4096 1 0 1 1 1 0 1 0
8 0
dma256 256 6 0 6 1 1 0 1 0
8 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 17 0 17 1 1 0 1 0
8 0
aobjpl 64 1 0 0 1 0 1 1 0
8 0
dma16 16 17 0 17 1 1 0 1 0
8 0
8 0
uaddrrnd 24 230 0 216 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 230 0 216 1 0 1 1 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
8 0
vmmpekpl 168 6436 0 6414 2 0 2 2 0
8 0
vmmpepl 168 32771 0 31813 95 15 80 80 0 357
38
vmsppl 368 229 0 215 2 0 2 2 0
8 0
pdppl 4096 467 0 430 6 0 6 6 0
8 1
pvpl 32 112771 0 108707 120 5 115 115 0 265
81
pmappl 232 229 0 215 1 0 1 1 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 427 0 4 13 0 13 13 0
8 0
8 0
ddb{0}>
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