uvm_fault: pmap_page_remove (7)
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syzbot
Nov 11, 2025, 11:24:30 AM (yesterday) Nov 11
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 05de582f27ae remove the old pkg-config. It's not coming ba..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1379b0b4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=4f31ad0ccb0a35f3f07a
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/01f0991eb730/disk-05de582f.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/9bb9b659708c/bsd-05de582f.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d88972588e3/kernel-05de582f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4f31ad...@syzkaller.appspotmail.com
login: uvm_fault(0xfffffd806c09b5d8, 0x7f87abcfe938, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
159353 79049 60929 0x10 0 0 syz-executor
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: 6
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(0xfffffd806c09b5d8, 0x7f87abcfe938, 0, 2) -> e
ddb{1}> trace
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: -9
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002a3a4c40
rbx 0xfffffd805e7df730
rdx 0
rcx 0x7f8000000000
rax 0
r8 0
r9 0xffff80002a3a4c30
r10 0xb9f1705ee4a321ea
r11 0xd4592a0592f4b030
r12 0
r13 0
r14 0x7abcfe938
r15 0xfffffd8007f5a378
rip 0xffffffff827e277d pmap_page_remove+0x45d
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a3a4bc0
ss 0
pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
ddb{1}> show proc
PROC (syz-executor) tid=192839 pid=11350 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffea020 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff8000fffeb248,0xffff8000fffebcb8
process=0xffff80003c4b0028 user=0xffff80002a39f000, vmspace=0xfffffd806c09b5d8
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18687 182317 12991 0 2 0 syz-executor
18687 245021 12991 0 2 0x4000000 syz-executor
29234 374700 6477 0 2 0 syz-executor
29234 386636 6477 0 3 0x4000080 fsleep syz-executor
27891 87714 54674 0 2 0x2 ifconfig
54674 153330 37107 0 3 0x10008a sigsusp sh
90478 359501 57484 0 3 0x1000080 nanoslp syz-executor
90478 176438 57484 0 3 0x5000080 lockf syz-executor
90478 322718 57484 0 3 0x5000080 fsleep syz-executor
37107 67046 17721 0 3 0x82 wait syz-executor
79049 159353 28632 60929 7 0x10 syz-executor
79049 401666 28632 60929 2 0x4000010 syz-executor
79049 333251 28632 60929 3 0x4000090 fsleep syz-executor
80425 2572 59361 0 3 0x80 nanoslp syz-executor
80425 194767 59361 0 3 0x4000080 sbwait syz-executor
80425 184447 59361 0 3 0x4000080 fsleep syz-executor
706 569 1 0 3 0x100083 ttyin getty
30490 44001 0 0 3 0x14200 acct acct
6991 15683 0 0 3 0x14280 nfsidl nfsio
70686 373119 0 0 3 0x14280 nfsidl nfsio
68853 338175 0 0 3 0x14280 nfsidl nfsio
57102 189015 0 0 3 0x14280 nfsidl nfsio
57484 505739 17721 0 2 0x2 syz-executor
6168 413064 17721 0 3 0x82 nanoslp syz-executor
12991 198589 17721 0 3 0x82 nanoslp syz-executor
19716 236653 52761 0 3 0x100082 sbwait ndp
52761 195569 1 0 3 0x10008a sigsusp sh
59361 377328 17721 0 3 0x82 nanoslp syz-executor
28632 183222 17721 0 3 0x82 nanoslp syz-executor
92505 122607 17721 0 2 0x2 syz-executor
6477 251844 17721 0 3 0x82 nanoslp syz-executor
17721 499348 51222 0 3 0x82 kqread syz-executor
51222 325743 74866 0 3 0x10008a sigsusp ksh
74866 369701 27604 0 3 0x98 kqread sshd-session
27604 355305 4866 0 3 0x92 kqread sshd-session
4866 440904 1 0 3 0x88 kqread sshd
87491 372943 37352 74 3 0x1100092 bpf pflogd
37352 309525 1 0 3 0x80 sbwait pflogd
33756 248244 21537 73 3 0x1100090 kqread syslogd
21537 190971 1 0 3 0x100082 sbwait syslogd
46150 408692 1 0 3 0x100080 kqread resolvd
35584 475553 65844 77 2 0x100012 dhcpleased
40797 127078 65844 77 3 0x100092 kqread dhcpleased
65844 347004 1 0 3 0x80 kqread dhcpleased
13028 15250 0 0 3 0x14200 bored smr
16326 446091 0 0 2 0x14200 zerothread
48110 310819 0 0 3 0x14200 aiodoned aiodoned
68934 58940 0 0 3 0x14200 syncer update
36782 299314 0 0 3 0x14200 cleaner cleaner
39045 193029 0 0 3 0x14200 reaper reaper
56674 248007 0 0 3 0x14200 pgdaemon pagedaemon
53319 99174 0 0 3 0x14200 bored viomb
95043 287115 0 0 3 0x40014200 acpi0 acpi0
31483 497730 0 0 3 0x40014200 idle1
3343 313276 0 0 3 0x14200 bored softnet1
94189 63619 0 0 3 0x14200 bored softnet0
83174 401385 0 0 3 0x14200 bored systqmp
28721 328371 0 0 3 0x14200 bored systq
92583 369431 0 0 3 0x14200 tmoslp softclockmp
82708 365223 0 0 3 0x40014200 tmoslp softclock
41283 487988 0 0 3 0x40014200 idle0
1 417090 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c09ac10)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_page_remove+0xca rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_page_remove+0xca pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#2 pmap_page_remove+0xca sys/arch/amd64/amd64/pmap.c:1974
#3 uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
#4 amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
#5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
#6 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
#7 exit1+0x6fc sys/kern/kern_exit.c:260
#8 sys_exit+0x1a sys/kern/kern_exit.c:-1
#9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
#10 Xsyscall+0x128
Process 92505 (syz-executor) thread 0xffff8000ffffcd00 (122607)
exclusive rwlock vmmaplk r = 0 (0xfffffd806c218118)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741
#4 process_new+0x577 sys/kern/kern_fork.c:281
#5 fork1+0x3f6 sys/kern/kern_fork.c:-1
#6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd800b027e58)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732
#4 process_new+0x577 sys/kern/kern_fork.c:281
#5 fork1+0x3f6 sys/kern/kern_fork.c:-1
#6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10235 11123K 11819K 166960K 13874 0
pcb 17 16K 21K 166960K 618 0
rtable 227 13K 14K 166960K 971 0
pf 39 18K 67487K 166960K 285 0
ifaddr 38 7K 8K 166960K 166 0
ifgroup 58 2K 3K 166960K 302 0
sysctl 4 1K 9K 166960K 90 0
counters 68 36K 38K 166960K 456 0
ioctlops 0 0K 5K 166960K 2083 0
iov 0 0K 24K 166960K 123 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1492 94K 94K 166960K 3739 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 10K 166960K 35 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 170 0
dirhash 12 2K 2K 166960K 42 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 20 73K 240K 166960K 2057 0
sigio 0 0K 0K 166960K 47 0
proc 80 131K 180K 166960K 851 0
subproc 81 5K 5K 166960K 109 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 524 0
in_multi 72 5K 7K 166960K 224 0
ether_multi 1 0K 0K 166960K 22 0
mrt 1 0K 0K 166960K 24 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 247 1102K 1102K 166960K 247 0
exec 0 0K 1K 166960K 577 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 249 171K 185K 166960K 20489 0
UVM aobj 226 29K 29K 166960K 231 0
pinsyscall 46 92K 106K 166960K 3283 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 224 0
NDP 12 0K 2K 166960K 113 0
temp 81 8660K 8916K 166960K 90415 0
kqueue 14 22K 30K 166960K 422 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 244 0 240 2 1 1 2 0 8 0
rtentry 176 283 0 202 6 0 6 6 0 8 0
unpcb 144 1637 0 1618 18 16 2 6 0 8 1
syncache 336 8 0 8 3 2 1 1 0 8 1
tcpqe 32 4 0 4 2 1 1 1 0 8 1
tcpcb 736 826 0 821 21 19 2 7 0 8 1
arp 136 37 0 23 1 0 1 1 0 8 0
inpcb 328 2428 0 2419 31 29 2 15 0 8 0
nd6 152 35 0 19 1 0 1 1 0 8 0
pkpcb 40 13 0 13 6 6 0 1 0 8 0
kcovpl 48 12 0 3 1 0 1 1 0 8 0
mppekey 1024 2 0 2 2 2 0 1 0 8 0
ppxss 1192 165 0 165 2 1 1 1 0 8 1
pppxif 1504 16 0 16 4 3 1 1 0 8 1
pfstscr 40 2 0 1 1 0 1 1 0 8 0
pffrag 232 34 0 22 2 1 1 2 0 482 0
pffrnode 88 20 0 9 1 0 1 1 0 8 0
pffrent 40 126 0 113 1 0 1 1 0 8 0
pfosfp 40 1429 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1429 0 714 21 0 21 21 0 8 0
pfrktable 1344 4 0 4 1 1 0 1 0 8 0
pfanchor 1288 2 0 2 1 1 0 1 0 8 0
pftag 88 2 0 2 1 1 0 1 0 8 0
pfstitem 24 147 0 68 1 0 1 1 0 8 0
pfstkey 128 154 0 75 3 0 3 3 0 8 0
pfstate 384 147 0 72 8 0 8 8 0 8 0
pfrule 1344 25 0 20 2 1 1 2 0 8 0
rttmr 136 4 0 4 4 4 0 1 0 8 0
art_heap8 4096 8 0 2 7 1 6 7 0 8 0
art_heap4 256 901 0 560 38 12 26 32 0 8 2
art_table 40 909 0 562 6 1 5 6 0 8 0
art_node 32 278 0 211 2 1 1 2 0 8 0
sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 162 0 152 1 0 1 1 0 8 0
shmpl 112 215 0 3 7 0 7 7 0 8 0
dirhash 1024 37 0 20 3 0 3 3 0 8 0
dino2pl 256 5594 0 4083 96 0 96 96 0 8 0
ffsino 296 5594 0 4083 117 0 117 117 0 8 0
nchpl 144 8413 0 6702 64 0 64 64 0 8 0
rtmask 32 21 0 21 6 6 0 1 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 30154 0 30153 3 2 1 2 0 8 0
percpumem 16 243 0 194 1 0 1 1 0 8 0
vcpupl 3968 13 0 2 2 0 2 2 0 8 0
vmpool 840 13 0 2 2 0 2 2 0 8 0
pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0
kstatmem 264 186 0 158 4 1 3 3 0 8 0
acpiwqpl 32 2 0 2 1 0 1 1 1 8 1
scsiplug 72 9 0 9 4 4 0 1 0 8 0
scxspl 216 51388 0 51388 13 11 2 8 1 8 2
plimitpl 152 591 0 570 2 1 1 2 0 8 0
sigapl 424 2390 0 2334 9 0 9 9 0 8 0
knotepl 120 737 0 0 22 0 22 22 0 8 0
kqueuepl 224 868 0 858 12 10 2 5 0 8 1
pipepl 344 430 0 400 15 11 4 9 0 8 1
fdescpl 528 2330 0 2296 3 0 3 3 0 8 0
filepl 160 17744 0 17516 38 25 13 21 0 8 1
lockfpl 104 908 0 904 2 1 1 2 0 8 0
lockfspl 48 367 0 364 1 0 1 1 0 8 0
sessionpl 144 35 0 26 1 0 1 1 0 8 0
pgrppl 48 114 0 96 1 0 1 1 0 8 0
ucredpl 104 3472 0 3458 1 0 1 1 0 8 0
zombiepl 144 2778 0 2777 1 0 1 1 0 8 0
processpl 1232 2390 0 2334 6 0 6 6 0 8 0
procpl 664 5706 0 5642 9 1 8 8 0 8 0
sosppl 176 14 0 14 3 2 1 1 0 8 1
sockpl 752 4384 0 4352 49 43 6 20 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 14 0 14 14 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 58 0 0 6 1 5 5 0 8 0
mtagpl 96 7 0 0 1 0 1 1 0 8 0
mbufpl 256 1449 0 0 91 0 91 91 0 8 0
bufpl 280 19944 0 13807 439 0 439 439 0 8 0
anonpl 32 12327 0 0 100 0 100 100 0 246 0
amapchunkpl 152 71321 0 70812 62 29 33 36 0 158 8
amappl16 200 7619 0 7589 59 43 16 26 0 8 7
amappl15 192 5 0 4 1 0 1 1 0 8 0
amappl14 184 6 0 6 1 1 0 1 0 8 0
amappl13 176 463 0 460 1 0 1 1 0 8 0
amappl12 168 2732 0 2687 3 0 3 3 0 8 0
amappl11 160 4 0 4 2 2 0 1 0 8 0
amappl10 152 53 0 38 1 0 1 1 0 8 0
amappl9 144 353 0 353 1 1 0 1 0 8 0
amappl8 136 33 0 30 1 0 1 1 0 8 0
amappl7 128 94 0 91 1 0 1 1 0 8 0
amappl6 120 329 0 311 1 0 1 1 0 8 0
amappl5 112 87 0 76 1 0 1 1 0 8 0
amappl4 104 466 0 435 1 0 1 1 0 8 0
amappl3 96 12475 0 12380 4 1 3 3 0 8 0
amappl2 88 2471 0 2389 3 0 3 3 0 8 1
amappl1 80 18103 0 17477 15 0 15 15 0 8 1
amappl 88 19332 0 19168 5 0 5 5 0 92 0
uvmvnodes 80 172 0 0 4 0 4 4 0 8 0
dma16384 16384 1 0 1 1 1 0 1 0 8 0
dma4096 4096 2 0 2 2 2 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 255 0 255 3 3 0 1 0 8 0
dma64 64 8 0 8 2 2 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 230 0 5 5 0 5 5 0 8 0
uaddrrnd 24 2330 0 2296 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2330 0 2296 1 0 1 1 0 8 0
vmmpekpl 168 20380 0 20331 3 0 3 3 0 8 0
vmmpepl 168 151706 0 149722 129 26 103 110 0 357 4
vmsppl 488 2329 0 2295 5 0 5 5 0 8 0
rwobjpl 80 41079 0 39689 43 8 35 36 0 8 0
pdppl 4096 4694 0 4605 141 51 90 90 0 8 1
pvpl 32 20678 0 0 166 0 166 166 0 265 0
pmappl 256 2342 0 2297 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 437 0 95 10 0 10 10 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff837d2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x70ab66fbc4f0, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff837d2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x70ab66fbc4f0, count: -3
ddb{0}> machine ddbcpu 1
Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: 6
ddb{1}> trace
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: -9
---
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:
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If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 05de582f27ae remove the old pkg-config. It's not coming ba..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1379b0b4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=4f31ad0ccb0a35f3f07a
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/01f0991eb730/disk-05de582f.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/9bb9b659708c/bsd-05de582f.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7d88972588e3/kernel-05de582f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4f31ad...@syzkaller.appspotmail.com
login: uvm_fault(0xfffffd806c09b5d8, 0x7f87abcfe938, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
159353 79049 60929 0x10 0 0 syz-executor
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: 6
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(0xfffffd806c09b5d8, 0x7f87abcfe938, 0, 2) -> e
ddb{1}> trace
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: -9
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002a3a4c40
rbx 0xfffffd805e7df730
rdx 0
rcx 0x7f8000000000
rax 0
r8 0
r9 0xffff80002a3a4c30
r10 0xb9f1705ee4a321ea
r11 0xd4592a0592f4b030
r12 0
r13 0
r14 0x7abcfe938
r15 0xfffffd8007f5a378
rip 0xffffffff827e277d pmap_page_remove+0x45d
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a3a4bc0
ss 0
pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
ddb{1}> show proc
PROC (syz-executor) tid=192839 pid=11350 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffea020 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff8000fffeb248,0xffff8000fffebcb8
process=0xffff80003c4b0028 user=0xffff80002a39f000, vmspace=0xfffffd806c09b5d8
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18687 182317 12991 0 2 0 syz-executor
18687 245021 12991 0 2 0x4000000 syz-executor
29234 374700 6477 0 2 0 syz-executor
29234 386636 6477 0 3 0x4000080 fsleep syz-executor
27891 87714 54674 0 2 0x2 ifconfig
54674 153330 37107 0 3 0x10008a sigsusp sh
90478 359501 57484 0 3 0x1000080 nanoslp syz-executor
90478 176438 57484 0 3 0x5000080 lockf syz-executor
90478 322718 57484 0 3 0x5000080 fsleep syz-executor
37107 67046 17721 0 3 0x82 wait syz-executor
79049 159353 28632 60929 7 0x10 syz-executor
79049 401666 28632 60929 2 0x4000010 syz-executor
79049 333251 28632 60929 3 0x4000090 fsleep syz-executor
80425 2572 59361 0 3 0x80 nanoslp syz-executor
80425 194767 59361 0 3 0x4000080 sbwait syz-executor
80425 184447 59361 0 3 0x4000080 fsleep syz-executor
706 569 1 0 3 0x100083 ttyin getty
30490 44001 0 0 3 0x14200 acct acct
6991 15683 0 0 3 0x14280 nfsidl nfsio
70686 373119 0 0 3 0x14280 nfsidl nfsio
68853 338175 0 0 3 0x14280 nfsidl nfsio
57102 189015 0 0 3 0x14280 nfsidl nfsio
57484 505739 17721 0 2 0x2 syz-executor
6168 413064 17721 0 3 0x82 nanoslp syz-executor
12991 198589 17721 0 3 0x82 nanoslp syz-executor
19716 236653 52761 0 3 0x100082 sbwait ndp
52761 195569 1 0 3 0x10008a sigsusp sh
59361 377328 17721 0 3 0x82 nanoslp syz-executor
28632 183222 17721 0 3 0x82 nanoslp syz-executor
92505 122607 17721 0 2 0x2 syz-executor
6477 251844 17721 0 3 0x82 nanoslp syz-executor
17721 499348 51222 0 3 0x82 kqread syz-executor
51222 325743 74866 0 3 0x10008a sigsusp ksh
74866 369701 27604 0 3 0x98 kqread sshd-session
27604 355305 4866 0 3 0x92 kqread sshd-session
4866 440904 1 0 3 0x88 kqread sshd
87491 372943 37352 74 3 0x1100092 bpf pflogd
37352 309525 1 0 3 0x80 sbwait pflogd
33756 248244 21537 73 3 0x1100090 kqread syslogd
21537 190971 1 0 3 0x100082 sbwait syslogd
46150 408692 1 0 3 0x100080 kqread resolvd
35584 475553 65844 77 2 0x100012 dhcpleased
40797 127078 65844 77 3 0x100092 kqread dhcpleased
65844 347004 1 0 3 0x80 kqread dhcpleased
13028 15250 0 0 3 0x14200 bored smr
16326 446091 0 0 2 0x14200 zerothread
48110 310819 0 0 3 0x14200 aiodoned aiodoned
68934 58940 0 0 3 0x14200 syncer update
36782 299314 0 0 3 0x14200 cleaner cleaner
39045 193029 0 0 3 0x14200 reaper reaper
56674 248007 0 0 3 0x14200 pgdaemon pagedaemon
53319 99174 0 0 3 0x14200 bored viomb
95043 287115 0 0 3 0x40014200 acpi0 acpi0
31483 497730 0 0 3 0x40014200 idle1
3343 313276 0 0 3 0x14200 bored softnet1
94189 63619 0 0 3 0x14200 bored softnet0
83174 401385 0 0 3 0x14200 bored systqmp
28721 328371 0 0 3 0x14200 bored systq
92583 369431 0 0 3 0x14200 tmoslp softclockmp
82708 365223 0 0 3 0x40014200 tmoslp softclock
41283 487988 0 0 3 0x40014200 idle0
1 417090 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c09ac10)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_page_remove+0xca rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_page_remove+0xca pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#2 pmap_page_remove+0xca sys/arch/amd64/amd64/pmap.c:1974
#3 uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
#4 amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
#5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
#6 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
#7 exit1+0x6fc sys/kern/kern_exit.c:260
#8 sys_exit+0x1a sys/kern/kern_exit.c:-1
#9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
#10 Xsyscall+0x128
Process 92505 (syz-executor) thread 0xffff8000ffffcd00 (122607)
exclusive rwlock vmmaplk r = 0 (0xfffffd806c218118)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741
#4 process_new+0x577 sys/kern/kern_fork.c:281
#5 fork1+0x3f6 sys/kern/kern_fork.c:-1
#6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd800b027e58)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732
#4 process_new+0x577 sys/kern/kern_fork.c:281
#5 fork1+0x3f6 sys/kern/kern_fork.c:-1
#6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10235 11123K 11819K 166960K 13874 0
pcb 17 16K 21K 166960K 618 0
rtable 227 13K 14K 166960K 971 0
pf 39 18K 67487K 166960K 285 0
ifaddr 38 7K 8K 166960K 166 0
ifgroup 58 2K 3K 166960K 302 0
sysctl 4 1K 9K 166960K 90 0
counters 68 36K 38K 166960K 456 0
ioctlops 0 0K 5K 166960K 2083 0
iov 0 0K 24K 166960K 123 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1492 94K 94K 166960K 3739 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 10K 166960K 35 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 170 0
dirhash 12 2K 2K 166960K 42 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 20 73K 240K 166960K 2057 0
sigio 0 0K 0K 166960K 47 0
proc 80 131K 180K 166960K 851 0
subproc 81 5K 5K 166960K 109 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 524 0
in_multi 72 5K 7K 166960K 224 0
ether_multi 1 0K 0K 166960K 22 0
mrt 1 0K 0K 166960K 24 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 247 1102K 1102K 166960K 247 0
exec 0 0K 1K 166960K 577 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 249 171K 185K 166960K 20489 0
UVM aobj 226 29K 29K 166960K 231 0
pinsyscall 46 92K 106K 166960K 3283 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 224 0
NDP 12 0K 2K 166960K 113 0
temp 81 8660K 8916K 166960K 90415 0
kqueue 14 22K 30K 166960K 422 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 244 0 240 2 1 1 2 0 8 0
rtentry 176 283 0 202 6 0 6 6 0 8 0
unpcb 144 1637 0 1618 18 16 2 6 0 8 1
syncache 336 8 0 8 3 2 1 1 0 8 1
tcpqe 32 4 0 4 2 1 1 1 0 8 1
tcpcb 736 826 0 821 21 19 2 7 0 8 1
arp 136 37 0 23 1 0 1 1 0 8 0
inpcb 328 2428 0 2419 31 29 2 15 0 8 0
nd6 152 35 0 19 1 0 1 1 0 8 0
pkpcb 40 13 0 13 6 6 0 1 0 8 0
kcovpl 48 12 0 3 1 0 1 1 0 8 0
mppekey 1024 2 0 2 2 2 0 1 0 8 0
ppxss 1192 165 0 165 2 1 1 1 0 8 1
pppxif 1504 16 0 16 4 3 1 1 0 8 1
pfstscr 40 2 0 1 1 0 1 1 0 8 0
pffrag 232 34 0 22 2 1 1 2 0 482 0
pffrnode 88 20 0 9 1 0 1 1 0 8 0
pffrent 40 126 0 113 1 0 1 1 0 8 0
pfosfp 40 1429 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1429 0 714 21 0 21 21 0 8 0
pfrktable 1344 4 0 4 1 1 0 1 0 8 0
pfanchor 1288 2 0 2 1 1 0 1 0 8 0
pftag 88 2 0 2 1 1 0 1 0 8 0
pfstitem 24 147 0 68 1 0 1 1 0 8 0
pfstkey 128 154 0 75 3 0 3 3 0 8 0
pfstate 384 147 0 72 8 0 8 8 0 8 0
pfrule 1344 25 0 20 2 1 1 2 0 8 0
rttmr 136 4 0 4 4 4 0 1 0 8 0
art_heap8 4096 8 0 2 7 1 6 7 0 8 0
art_heap4 256 901 0 560 38 12 26 32 0 8 2
art_table 40 909 0 562 6 1 5 6 0 8 0
art_node 32 278 0 211 2 1 1 2 0 8 0
sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 162 0 152 1 0 1 1 0 8 0
shmpl 112 215 0 3 7 0 7 7 0 8 0
dirhash 1024 37 0 20 3 0 3 3 0 8 0
dino2pl 256 5594 0 4083 96 0 96 96 0 8 0
ffsino 296 5594 0 4083 117 0 117 117 0 8 0
nchpl 144 8413 0 6702 64 0 64 64 0 8 0
rtmask 32 21 0 21 6 6 0 1 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 30154 0 30153 3 2 1 2 0 8 0
percpumem 16 243 0 194 1 0 1 1 0 8 0
vcpupl 3968 13 0 2 2 0 2 2 0 8 0
vmpool 840 13 0 2 2 0 2 2 0 8 0
pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0
kstatmem 264 186 0 158 4 1 3 3 0 8 0
acpiwqpl 32 2 0 2 1 0 1 1 1 8 1
scsiplug 72 9 0 9 4 4 0 1 0 8 0
scxspl 216 51388 0 51388 13 11 2 8 1 8 2
plimitpl 152 591 0 570 2 1 1 2 0 8 0
sigapl 424 2390 0 2334 9 0 9 9 0 8 0
knotepl 120 737 0 0 22 0 22 22 0 8 0
kqueuepl 224 868 0 858 12 10 2 5 0 8 1
pipepl 344 430 0 400 15 11 4 9 0 8 1
fdescpl 528 2330 0 2296 3 0 3 3 0 8 0
filepl 160 17744 0 17516 38 25 13 21 0 8 1
lockfpl 104 908 0 904 2 1 1 2 0 8 0
lockfspl 48 367 0 364 1 0 1 1 0 8 0
sessionpl 144 35 0 26 1 0 1 1 0 8 0
pgrppl 48 114 0 96 1 0 1 1 0 8 0
ucredpl 104 3472 0 3458 1 0 1 1 0 8 0
zombiepl 144 2778 0 2777 1 0 1 1 0 8 0
processpl 1232 2390 0 2334 6 0 6 6 0 8 0
procpl 664 5706 0 5642 9 1 8 8 0 8 0
sosppl 176 14 0 14 3 2 1 1 0 8 1
sockpl 752 4384 0 4352 49 43 6 20 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 14 0 14 14 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 58 0 0 6 1 5 5 0 8 0
mtagpl 96 7 0 0 1 0 1 1 0 8 0
mbufpl 256 1449 0 0 91 0 91 91 0 8 0
bufpl 280 19944 0 13807 439 0 439 439 0 8 0
anonpl 32 12327 0 0 100 0 100 100 0 246 0
amapchunkpl 152 71321 0 70812 62 29 33 36 0 158 8
amappl16 200 7619 0 7589 59 43 16 26 0 8 7
amappl15 192 5 0 4 1 0 1 1 0 8 0
amappl14 184 6 0 6 1 1 0 1 0 8 0
amappl13 176 463 0 460 1 0 1 1 0 8 0
amappl12 168 2732 0 2687 3 0 3 3 0 8 0
amappl11 160 4 0 4 2 2 0 1 0 8 0
amappl10 152 53 0 38 1 0 1 1 0 8 0
amappl9 144 353 0 353 1 1 0 1 0 8 0
amappl8 136 33 0 30 1 0 1 1 0 8 0
amappl7 128 94 0 91 1 0 1 1 0 8 0
amappl6 120 329 0 311 1 0 1 1 0 8 0
amappl5 112 87 0 76 1 0 1 1 0 8 0
amappl4 104 466 0 435 1 0 1 1 0 8 0
amappl3 96 12475 0 12380 4 1 3 3 0 8 0
amappl2 88 2471 0 2389 3 0 3 3 0 8 1
amappl1 80 18103 0 17477 15 0 15 15 0 8 1
amappl 88 19332 0 19168 5 0 5 5 0 92 0
uvmvnodes 80 172 0 0 4 0 4 4 0 8 0
dma16384 16384 1 0 1 1 1 0 1 0 8 0
dma4096 4096 2 0 2 2 2 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 255 0 255 3 3 0 1 0 8 0
dma64 64 8 0 8 2 2 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 230 0 5 5 0 5 5 0 8 0
uaddrrnd 24 2330 0 2296 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2330 0 2296 1 0 1 1 0 8 0
vmmpekpl 168 20380 0 20331 3 0 3 3 0 8 0
vmmpepl 168 151706 0 149722 129 26 103 110 0 357 4
vmsppl 488 2329 0 2295 5 0 5 5 0 8 0
rwobjpl 80 41079 0 39689 43 8 35 36 0 8 0
pdppl 4096 4694 0 4605 141 51 90 90 0 8 1
pvpl 32 20678 0 0 166 0 166 166 0 265 0
pmappl 256 2342 0 2297 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 437 0 95 10 0 10 10 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff837d2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x70ab66fbc4f0, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff837d2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x70ab66fbc4f0, count: -3
ddb{0}> machine ddbcpu 1
Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: 6
ddb{1}> trace
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8007f5a310) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd807e09b448,0) at uvm_anfree_list+0xd6 sys/uvm/uvm_anon.c:112
amap_wipeout(fffffd806bf341b8) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a3a4d40,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806c09b5d8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff8000fffea020,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffea020,ffff80002a3a4f10,ffff80002a3a4e60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3a4f10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3a4f10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77c4b1188d70, count: -9
---
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