syzbot
panic: kernel diagnostic assertion "pg->wire_count != NUM" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_p (2)
Status:
upstream: reported on 2026/09/23 21:45
Reported-by: syzbot+8aa5f9f38b4e5d3e3884@syzkaller.appspotmail.com
First crash: 52d, last: 1h54m
Sample crash report:
panic: keWrnAeRlN IdNiGa: gSnPosL tNOiTc LaOsWsEReErtD iOoNn "SYpgS-C>wAiLLr e5_ c0o unEXtI !T =0 90
" fStopped at savectx+0xae: movl $0,%gs:0x688
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*505677 11903 32767 0x10 0x4000000 1 syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0xc6cb24fab60, count: 14
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
*cpu0: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1207
ddb{1}> show kasan
No such command
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0xc6cb24fab60, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80003ab9d710
rbx 0
rdx 0
rcx 0xffff80003abaa020
rax 0x31
r8 0xffff80003ab9d640
r9 0
r10 0xf0c53a1f3af1f5a9
r11 0x2551d51b11a30744
r12 0
r13 0
r14 0xffff80003abaa020
r15 0
rip 0xffffffff82f133ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80003ab9d690
ss 0
savectx+0xae: movl $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=505677 pid=11903 tcnt=4 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=17, usrpri=74, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003abab778,0xffff80003abaa560
process=0xffff80003c3c4ea8 user=0xffff80003ab98000, vmspace=0xfffffc8074bbfd68
estcpu=24, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
56110 6603 78871 32767 2 0x10 0 syz-executor
15872 200027 85379 32767 2 0x10 0 syz-executor
11903 471418 63899 32767 2 0x10 0 syz-executor
*11903 505677 63899 32767 7 0x10 0x4000000 syz-executor
11903 501550 63899 32767 2 0x10 0x4000000 syz-executor
11903 117683 63899 32767 2 0x10 0x4000000 syz-executor
71442 457401 7761 0 2 0x2 0 syz-executor
70265 288817 29977 32767 2 0x10 0 syz-executor
70265 417585 29977 32767 3 0x10 0x4000080 lockf syz-executor
70265 123809 29977 32767 3 0x10 0x4000080 lockf syz-executor
24850 48006 7761 0 2 0x2 0 syz-executor
63899 501816 81318 32767 2 0x10 0xc80 syz-executor
81318 491567 7761 0 3 0x2 0x80 wait syz-executor
78871 264330 93367 32767 3 0x10 0x80 nanoslp syz-executor
93367 279156 7761 0 3 0x2 0x80 wait syz-executor
17702 135691 14902 32767 2 0x10 0xc80 syz-executor
14902 51021 7761 0 3 0x2 0x80 wait syz-executor
85379 463886 78507 32767 2 0x10 0 syz-executor
78507 420173 7761 0 3 0x2 0x80 wait syz-executor
29977 78376 45767 32767 3 0x10 0x80 nanoslp syz-executor
46609 483695 48474 32767 3 0x10 0x80 piperd syz-executor
48474 300595 7761 0 3 0x2 0x80 wait syz-executor
45767 461603 7761 0 3 0x2 0x80 wait syz-executor
7761 475441 89704 0 2 0x2 0 syz-executor
89704 381649 44662 0 3 0x100002 0x88 sigsusp ksh
44662 279768 7567 0 3 0x10 0x88 kqread sshd-session
7567 18394 48017 0 3 0x12 0x80 kqread sshd-session
28923 309987 1 0 3 0x100003 0x80 ttyin getty
48017 34213 1 0 3 0 0x88 kqread sshd
22677 448830 55350 73 3 0x1100010 0x80 kqread syslogd
55350 69765 1 0 3 0x100002 0x80 sbwait syslogd-parent
86980 416767 1 0 3 0x100000 0x80 kqread resolvd
58605 29492 53603 77 3 0x100012 0x80 kqread dhcpleased
33183 491882 53603 77 3 0x100012 0x80 kqread dhcpleased
53603 395398 1 0 3 0 0x80 kqread dhcpleased
19497 330939 0 0 3 0x14000 0x200 bored smr
88233 439242 0 0 2 0x14000 0x200 zerothread
38928 148028 0 0 3 0x14000 0x200 aiodoned aiodoned
28816 22805 0 0 3 0x14000 0x200 syncer update
79475 109369 0 0 3 0x14000 0x200 cleaner cleaner
641 432877 0 0 3 0x14000 0x200 reaper reaper
36920 350972 0 0 3 0x14000 0x200 pgdaemon pagedaemon
29507 11897 0 0 3 0x14000 0x200 bored viomb
59040 486782 0 0 3 0x14000 0x40000200 acpi0 acpi0
67359 77086 0 0 3 0x14000 0x40000200 idle1
82647 56696 0 0 3 0x14000 0x200 bored softnet1
63211 63995 0 0 3 0x14000 0x200 bored softnet0
25278 447420 0 0 3 0x14000 0x200 smrbar systqmp
22545 405985 0 0 3 0x14000 0x200 bored systq
52230 38445 0 0 3 0x14000 0x200 tmoslp softclockmp
43994 395790 0 0 3 0x14000 0x40000200 tmoslp softclock
66891 2662 0 0 3 0x14000 0x40000200 idle0
1 452859 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &iopl->mtx r = 0 (0xffff8000000a4088)
#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+0x4c3 sys/kern/kern_lock.c:487
#2 scsi_xsh_add+0x69 sys/scsi/scsi_base.c:502
#3 sdstrategy+0x20b sys/scsi/sd.c:565
#4 spec_strategy+0x42 sys/kern/spec_vnops.c:448
#5 VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
#6 ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
#7 VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
#8 bwrite+0x30a sys/kern/vfs_bio.c:616
#9 VOP_BWRITE+0x60 sys/kern/vfs_vops.c:648
#10 ufs_direnter+0x7ac sys/ufs/ufs/ufs_lookup.c:833
#11 ufs_makeinode+0x51b sys/ufs/ufs/ufs_vnops.c:1796
#12 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
#13 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
#14 vn_open+0x4e7 sys/kern/vfs_vnops.c:118
#15 doopenat+0x36c sys/kern/vfs_syscalls.c:1163
#16 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#17 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#17 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:804
#18 Xsyscall+0x128
Process 11903 (syz-executor) thread 0xffff80003abaa020 (505677)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3f7c0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3 biowait+0xc6 sys/kern/vfs_bio.c:1110
#4 bwrite+0x359 sys/kern/vfs_bio.c:625
#5 ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111
#6 ufs_makeinode+0x4b0 sys/ufs/ufs/ufs_vnops.c:1792
#7 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
#8 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
#9 vn_open+0x4e7 sys/kern/vfs_vnops.c:118
#10 doopenat+0x36c sys/kern/vfs_syscalls.c:1163
#11 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:804
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffc806cbbd208)
#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+0x42c sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:156
#5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1760
#8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
#9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
#10 vn_open+0x4e7 sys/kern/vfs_vnops.c:118
#11 doopenat+0x36c sys/kern/vfs_syscalls.c:1163
#12 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:804
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffc806cbbdb48)
#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+0x42c sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x10e sys/kern/vfs_lookup.c:431
#6 namei+0x5ea sys/kern/vfs_lookup.c:250
#7 vn_open+0x218 sys/kern/vfs_vnops.c:109
#8 doopenat+0x36c sys/kern/vfs_syscalls.c:1163
#9 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:804
#11 Xsyscall+0x128
exclusive mutex &iopl->mtx r = 0 (0xffff8000000a4088)
#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+0x4c3 sys/kern/kern_lock.c:487
#2 scsi_xsh_add+0x69 sys/scsi/scsi_base.c:502
#3 sdstrategy+0x20b sys/scsi/sd.c:565
#4 spec_strategy+0x42 sys/kern/spec_vnops.c:448
#5 VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
#6 ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1
#7 VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636
#8 bwrite+0x30a sys/kern/vfs_bio.c:616
#9 VOP_BWRITE+0x60 sys/kern/vfs_vops.c:648
#10 ufs_direnter+0x7ac sys/ufs/ufs/ufs_lookup.c:833
#11 ufs_makeinode+0x51b sys/ufs/ufs/ufs_vnops.c:1796
#12 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
#13 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
#14 vn_open+0x4e7 sys/kern/vfs_vnops.c:118
#15 doopenat+0x36c sys/kern/vfs_syscalls.c:1163
#16 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#17 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#17 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:804
#18 Xsyscall+0x128
Process 25278 (systqmp) thread 0xffff800045ffea60 (447420)
shared rwlock systqmp r = 0 (0xffffffff83929548)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x11a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11069 12017K 12034K 166960K 12203 0
pcb 17 12K 12K 166960K 17 0
rtable 185 5K 7K 166960K 716 0
pf 27 16K 16K 166960K 55 0
ifaddr 35 6K 7K 166960K 94 0
ifgroup 42 1K 2K 166960K 98 0
sysctl 3 1K 9K 166960K 9 0
counters 66 36K 37K 166960K 94 0
ioctlops 0 0K 4K 166960K 49 0
iov 0 0K 4K 166960K 6 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1289 81K 81K 166960K 1592 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 8 0
VM map 2 1K 1K 166960K 2 0
sem 10 1K 1K 166960K 10 0
dirhash 12 2K 2K 166960K 21 0
ACPI 1692 195K 286K 166960K 12472 0
file desc 20 73K 121K 166960K 477 0
sigio 0 0K 0K 166960K 7 0
proc 58 99K 147K 166960K 846 0
subproc 62 3K 4K 166960K 233 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 23 0
in_multi 77 5K 6K 166960K 235 0
ether_multi 1 0K 0K 166960K 2 0
mrt 0 0K 0K 166960K 9 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 211 943K 943K 166960K 211 0
exec 0 0K 1K 166960K 612 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 207 135K 165K 166960K 5215 0
UVM aobj 10 2K 2K 166960K 11 0
pinsyscall 41 82K 111K 166960K 1893 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 4 0
NDP 11 0K 2K 166960K 63 0
temp 33 9126K 9146K 166960K 5345 0
kqueue 13 20K 26K 166960K 46 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 103 0 99 2 0 2 2 0 8 1
rtentry 176 246 0 157 6 0 6 6 0 8 1
unpcb 144 188 0 173 4 0 4 4 0 8 3
syncache 336 8 0 8 1 0 1 1 0 8 1
tcpcb 736 157 0 153 7 0 7 7 0 8 6
arp 136 42 0 28 1 0 1 1 0 8 0
ipq 40 4 0 4 1 0 1 1 0 8 1
ipqe 40 8 0 8 1 0 1 1 0 8 1
inpcb 328 420 0 413 12 3 9 12 0 8 8
nd6 152 63 0 45 1 0 1 1 0 8 0
kcovpl 48 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 256 998 0 587 30 0 30 30 0 8 1
art_table 40 999 0 587 5 0 5 5 0 8 0
art_node 32 246 0 157 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0
semupl 112 2 0 2 1 0 1 1 0 8 1
semapl 72 8 0 0 1 0 1 1 0 8 0
shmpl 120 8 0 1 1 0 1 1 0 8 0
dirhash 1024 23 0 6 3 0 3 3 0 8 0
dino2pl 256 1830 0 317 95 0 95 95 0 8 0
ffsino 296 1830 0 317 117 0 117 117 0 8 0
nchpl 144 2185 0 434 65 0 65 65 0 8 0
vnodes 216 2072 0 0 116 0 116 116 0 8 0
namei 1024 9083 0 9083 3 1 2 2 0 8 2
percpumem 16 63 0 14 1 0 1 1 0 8 0
kstatmem 264 49 0 28 2 0 2 2 0 8 0
scxspl 216 7339 0 7339 5 2 3 3 1 8 3
plimitpl 152 228 0 205 2 0 2 2 0 8 0
sigapl 424 732 0 683 7 0 7 7 0 8 0
knotepl 120 313 0 0 10 0 10 10 0 8 0
kqueuepl 224 67 0 58 1 0 1 1 0 8 0
pipepl 344 192 0 165 3 0 3 3 0 8 0
fdescpl 528 716 0 684 4 1 3 3 0 8 0
filepl 160 3179 0 2982 15 0 15 15 0 8 4
lockfpl 104 48 0 42 1 0 1 1 0 8 0
lockfspl 48 22 0 18 1 0 1 1 0 8 0
sessionpl 144 52 0 38 1 0 1 1 0 8 0
pgrppl 48 80 0 58 1 0 1 1 0 8 0
ucredpl 104 593 0 576 1 0 1 1 0 8 0
zombiepl 144 684 0 683 1 0 1 1 0 8 0
processpl 1240 732 0 683 5 0 5 5 0 8 0
procpl 664 951 0 897 6 0 6 6 0 8 0
sosppl 176 1 0 1 1 0 1 1 0 8 1
sockpl 752 711 0 685 18 7 11 16 0 8 8
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 121 0 0 16 0 16 16 0 8 0
mcl2k 2048 18 0 0 3 0 3 3 0 8 0
mextrefs 64 17 0 0 1 0 1 1 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 906 0 0 57 0 57 57 0 8 0
bufpl 272 5141 0 85 338 0 338 338 0 8 0
anonpl 32 7558 0 0 61 0 61 61 0 247 0
amapchunkpl 152 15185 0 14487 28 0 28 28 0 158 0
amappl16 200 1508 0 1493 4 1 3 4 0 8 1
amappl15 192 6 0 6 2 2 0 1 0 8 0
amappl14 184 548 0 547 1 0 1 1 0 8 0
amappl13 176 143 0 133 1 0 1 1 0 8 0
amappl12 168 1003 0 971 2 0 2 2 0 8 0
amappl11 160 35 0 35 1 1 0 1 0 8 0
amappl10 152 62 0 54 1 0 1 1 0 8 0
amappl9 144 276 0 276 1 1 0 1 0 8 0
amappl8 136 137 0 136 1 0 1 1 0 8 0
amappl7 128 160 0 150 1 0 1 1 0 8 0
amappl6 120 185 0 184 1 0 1 1 0 8 0
amappl5 112 181 0 175 1 0 1 1 0 8 0
amappl4 104 299 0 285 1 0 1 1 0 8 0
amappl3 96 2878 0 2766 4 0 4 4 0 8 0
amappl2 88 502 0 452 2 0 2 2 0 8 0
amappl1 80 12170 0 11614 13 0 13 13 0 8 0
amappl 88 4312 0 4165 5 0 5 5 0 92 0
uvmvnodes 80 104 0 0 3 0 3 3 0 8 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 10 0 1 1 0 1 1 0 8 0
uaddrrnd 24 716 0 683 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 716 0 683 1 0 1 1 0 8 0
vmmpekpl 168 7178 0 7128 3 0 3 3 0 8 0
vmmpepl 168 53734 0 51920 92 0 92 92 0 357 8
vmsppl 488 715 0 683 6 0 6 6 0 8 0
rwobjpl 80 17726 0 16822 22 1 21 22 0 8 0
pdppl 4096 1440 0 1366 118 36 82 96 0 8 8
pvpl 32 27581 0 0 224 1 223 223 0 265 0
pmappl 256 715 0 683 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 680 0 39 19 0 19 19 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff839edff0) 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:677
comcnputc(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline]
comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1274
cnputc(66) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(66) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x2a25 sys/kern/subr_prf.c:-1
db_printf(ffffffff834d1791) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff834f8c96) at panic+0x103 sys/kern/subr_prf.c:217
__assert(ffffffff83536089,ffffffff8348aba2,4b7,ffffffff8348abd7) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffffc80093d75d8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffffc806cdec9b0,e3403ebc000,e3403ebd000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffffc806cdec9b0,fffffc806cef62b0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
end trace frame: 0xffff80002a2f36f0, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff839edff0) 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
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:677
comcnputc(800,66) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline]
comcnputc(800,66) at comcnputc+0x250 sys/dev/ic/com.c:1274
cnputc(66) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(66) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x2a25 sys/kern/subr_prf.c:-1
db_printf(ffffffff834d1791) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff834f8c96) at panic+0x103 sys/kern/subr_prf.c:217
__assert(ffffffff83536089,ffffffff8348aba2,4b7,ffffffff8348abd7) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffffc80093d75d8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffffc806cdec9b0,e3403ebc000,e3403ebd000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffffc806cdec9b0,fffffc806cef62b0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_map_teardown(fffffc806cdec9b0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffc806cdec9b0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
exit1(ffff80003abaafb0,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260
sys_exit(ffff80003abaafb0,ffff80002a2f3880,ffff80002a2f37d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a2f3880) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2f3880) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ee2f11f9b00, count: -19
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0xc6cb24fab60, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0xc6cb24fab60, count: -1
Struck through repros no longer work on HEAD.