assert "anon->an_lock == amap->am_lock" failed in uvm_fault.c
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syzbot
Mar 11, 2026, 1:09:32 PM (4 days ago) Mar 11
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 177cf78f1bc3 RFC5321 specifies max-rcpt to be >= 100 as a ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12d63016580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=9900933c9453de1fc3b0
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8587b7aca98d/disk-177cf78f.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/84da0ccb597a/bsd-177cf78f.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/be6130e79e1e/kernel-177cf78f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+990093...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "anon->an_lock == amap->am_lock" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_fault.c", line 968
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*255966 15375 0 0 0 1 syz-executor
289146 43202 0 0x2 0x1 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: 7
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: kernel diagnostic assertion "anon->an_lock == amap->am_lock" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_fault.c", line 968
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000373b7740
rbx 0xffff8000299bee07
rdx 0
rcx 0xffff8000fffef4d8
rax 0xffff8000299bdff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xbb963d7d7e13a4ee
r11 0xb12942e43da8441b
r12 0xffff8000299bec08
r13 0
r14 0
r15 0x1
rip 0xffffffff81e6e4e5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff8000373b7730
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=255966 pid=15375 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=78, usrpri=79, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffee7e0,0xffff8000fffee2c0
process=0xffff80003c3f5d00 user=0xffff8000373b2000, vmspace=0xfffffd80780d7d70
estcpu=29, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
98631 360797 93625 0 2 0 syz-executor
93968 144515 43202 0 2 0 syz-executor
93968 176763 43202 0 2 0x4000000 syz-executor
93968 153313 43202 0 2 0x4000000 syz-executor
*15375 255966 41629 0 7 0 syz-executor
15375 19644 41629 0 3 0x4000080 fsleep syz-executor
25737 441024 91443 0 2 0 syz-executor
25737 45558 91443 0 3 0x4000080 fsleep syz-executor
81912 363024 80757 0 2 0 syz-executor
81912 11464 80757 0 2 0x4000000 syz-executor
75337 363043 87502 0 2 0 syz-executor
75337 203320 87502 0 3 0x4000080 fsleep syz-executor
75337 287307 87502 0 2 0x4000000 syz-executor
32727 470592 85605 0 2 0 syz-executor
32727 320604 85605 0 3 0x4000080 fsleep syz-executor
32727 400356 85605 0 3 0x4000080 fsleep syz-executor
91085 388233 0 0 3 0x14200 acct acct
56917 53133 95351 0 3 0x3000 suspend syz-executor
56917 29187 95351 0 2 0x4081000 syz-executor
93625 367509 83429 0 2 0xc82 syz-executor
80757 300800 83429 0 2 0xc82 syz-executor
43202 289146 83429 0 7 0x3 syz-executor
87502 408829 83429 0 2 0xc82 syz-executor
95351 355271 83429 0 3 0x82 wait syz-executor
85605 427267 83429 0 2 0xc82 syz-executor
91443 78173 83429 0 2 0xc82 syz-executor
41629 254117 83429 0 2 0xc82 syz-executor
83429 375302 57182 0 3 0x82 kqread syz-executor
57182 152594 116 0 3 0x10008a sigsusp ksh
116 117822 38063 0 3 0x98 kqread sshd-session
38063 181363 48570 0 3 0x92 kqread sshd-session
47688 70549 1 0 3 0x100083 ttyin getty
48570 101427 1 0 3 0x88 kqread sshd
51596 190646 98764 74 3 0x1100092 bpf pflogd
98764 127995 1 0 3 0x80 sbwait pflogd
60368 463708 83605 73 3 0x1100090 kqread syslogd
83605 113160 1 0 3 0x100082 sbwait syslogd
28776 265963 1 0 3 0x100080 kqread resolvd
30016 426061 63414 77 3 0x100092 kqread dhcpleased
3598 395228 63414 77 3 0x100092 kqread dhcpleased
63414 290701 1 0 3 0x80 kqread dhcpleased
21587 338372 0 0 3 0x14200 bored smr
45684 134164 0 0 2 0x14200 zerothread
86191 320333 0 0 3 0x14200 aiodoned aiodoned
62668 453497 0 0 3 0x14200 syncer update
22273 350843 0 0 3 0x14200 cleaner cleaner
58328 435092 0 0 3 0x14200 reaper reaper
25645 18665 0 0 3 0x14200 pgdaemon pagedaemon
85882 108872 0 0 3 0x14200 bored viomb
14146 105765 0 0 3 0x40014200 acpi0 acpi0
22507 403212 0 0 3 0x40014200 idle1
99523 244586 0 0 3 0x14200 bored softnet1
61220 231936 0 0 3 0x14200 bored softnet0
26658 329997 0 0 3 0x14200 bored systqmp
60529 349220 0 0 3 0x14200 bored systq
48026 294799 0 0 3 0x14200 tmoslp softclockmp
15916 429940 0 0 3 0x40014200 tmoslp softclock
26553 332751 0 0 3 0x40014200 idle0
1 194660 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 15375 (syz-executor) thread 0xffff8000fffef4d8 (255966)
shared rwlock amaplk r = 0 (0xfffffd806f46c458)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#6 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd80780d7e70)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
Process 56917 (syz-executor) thread 0xffff8000333b0a88 (29187)
exclusive rrwlock inode r = 0 (0xfffffd806bae0b30)
#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 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:570
#5 vn_write+0x18f sys/kern/vfs_vnops.c:405
#6 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#7 sys_write+0xa2 sys/kern/sys_generic.c:300
#8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11063 12089K 12303K 166960K 12415 0
pcb 17 12K 12K 166960K 42 0
rtable 252 8K 8K 166960K 400 0
pf 34 17K 81K 166960K 58 0
ifaddr 43 7K 7K 166960K 54 0
ifgroup 55 2K 2K 166960K 71 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 88 0
ioctlops 0 0K 4K 166960K 1521 0
iov 0 0K 16K 166960K 9 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1387 87K 88K 166960K 1621 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 6 0K 0K 166960K 7 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 89K 166960K 266 0
sigio 0 0K 0K 166960K 1 0
proc 72 115K 147K 166960K 564 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 29 0
in_multi 99 7K 7K 166960K 110 0
ether_multi 1 0K 0K 166960K 1 0
mrt 1 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 67 307K 307K 166960K 67 0
exec 0 0K 1K 166960K 412 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 233 167K 181K 166960K 4416 0
UVM aobj 9 6K 6K 166960K 10 0
pinsyscall 43 86K 102K 166960K 1433 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 13 0
NDP 12 0K 2K 166960K 34 0
temp 36 9070K 9138K 166960K 12858 0
kqueue 13 20K 28K 166960K 49 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 48 0 43 1 0 1 1 0 8 0
rtentry 176 114 0 4 6 1 5 6 0 8 0
unpcb 144 129 0 112 2 1 1 2 0 8 0
syncache 336 3 0 3 1 1 0 1 0 8 0
tcpcb 736 40 0 36 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 169 0 161 2 0 2 2 0 8 0
nd6 152 25 0 1 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 7 0 7 2 1 1 1 0 8 1
pppxif 1504 2 0 2 1 1 0 1 0 8 0
pffrag 232 6 0 1 1 0 1 1 0 482 0
pffrnode 88 5 0 1 1 0 1 1 0 8 0
pffrent 40 7 0 2 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 1 0 1 1 1 0 1 0 8 0
pfstitem 24 27 0 0 1 0 1 1 0 8 0
pfstkey 128 27 0 0 1 0 1 1 0 8 0
pfstate 448 27 0 0 3 0 3 3 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 256 459 0 6 29 0 29 29 0 8 0
art_table 40 460 0 6 5 0 5 5 0 8 0
art_node 32 114 0 14 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0
semapl 112 5 0 1 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 1906 0 441 93 0 93 93 0 8 0
ffsino 296 1906 0 441 114 0 114 114 0 8 0
nchpl 144 2271 0 577 64 0 64 64 0 8 0
vnodes 216 2137 0 0 119 0 119 119 0 8 0
namei 1024 7390 0 7390 2 1 1 1 0 8 1
percpumem 16 59 0 9 1 0 1 1 0 8 0
vcpupl 3968 3 0 1 1 0 1 1 0 8 0
vmpool 848 3 0 1 1 0 1 1 0 8 0
kstatmem 264 36 0 10 3 1 2 3 0 8 0
scxspl 216 9755 0 9755 10 2 8 8 1 8 8
plimitpl 152 51 0 32 1 0 1 1 0 8 0
sigapl 424 589 0 540 7 1 6 7 0 8 0
knotepl 120 305 0 0 10 0 10 10 0 8 0
kqueuepl 224 64 0 55 1 0 1 1 0 8 0
pipepl 344 135 0 108 3 0 3 3 0 8 0
fdescpl 528 571 0 539 3 0 3 3 0 8 0
filepl 160 2654 0 2438 17 6 11 17 0 8 0
lockfpl 104 65 0 61 1 0 1 1 0 8 0
lockfspl 48 30 0 26 1 0 1 1 0 8 0
sessionpl 144 22 0 13 1 0 1 1 0 8 0
pgrppl 48 32 0 15 1 0 1 1 0 8 0
ucredpl 104 389 0 376 1 0 1 1 0 8 0
zombiepl 144 541 0 540 1 0 1 1 0 8 0
processpl 1232 589 0 540 5 0 5 5 0 8 0
procpl 664 827 0 768 6 0 6 6 0 8 0
sockpl 752 358 0 328 8 3 5 7 0 8 2
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 24 0 0 3 0 3 3 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 180 0 0 12 0 12 12 0 8 0
bufpl 280 3676 0 105 256 0 256 256 0 8 0
anonpl 32 6428 0 0 52 0 52 52 0 246 0
anonpl: pool(0xffffffff8395e858:anonpl): page inconsistency: page 0x0; at page head addr 0xfffffd806c3a5f90 (p 0xfffffd806c3a5000)
amapchunkpl 152 12858 0 12332 31 4 27 31 0 158 0
amappl16 200 2377 0 2212 11 2 9 9 0 8 0
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 439 0 438 1 0 1 1 0 8 0
amappl13 176 120 0 108 1 0 1 1 0 8 0
amappl12 168 822 0 792 2 0 2 2 0 8 0
amappl11 160 62 0 61 1 0 1 1 0 8 0
amappl10 152 68 0 54 1 0 1 1 0 8 0
amappl9 144 262 0 262 1 1 0 1 0 8 0
amappl8 136 147 0 145 1 0 1 1 0 8 0
amappl7 128 125 0 123 1 0 1 1 0 8 0
amappl6 120 266 0 254 1 0 1 1 0 8 0
amappl5 112 89 0 79 1 0 1 1 0 8 0
amappl4 104 475 0 435 2 0 2 2 0 8 0
amappl3 96 2096 0 2010 4 1 3 3 0 8 0
amappl2 88 642 0 574 2 0 2 2 0 8 0
amappl1 80 9779 0 9184 14 0 14 14 0 8 0
amappl 88 3666 0 3505 5 0 5 5 0 92 0
uvmvnodes 80 103 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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 571 0 539 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 571 0 539 1 0 1 1 0 8 0
vmmpekpl 168 6401 0 6368 2 0 2 2 0 8 0
vmmpepl 168 44416 0 42331 93 1 92 92 0 357 0
vmsppl 488 570 0 539 5 1 4 5 0 8 0
rwobjpl 80 15603 0 14439 25 1 24 24 0 8 0
pdppl 4096 1155 0 1082 102 28 74 83 0 8 1
pvpl 32 14426 0 0 118 1 117 117 0 265 0
pmappl 256 573 0 540 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 275 0 33 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff838a4ff0) 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
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 sys/kern/kern_lock.c:173
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209
syscall(ffff80002a35e080) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80002a35e080) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76827b28da10, count: 8
ddb{0}> trace
x86_ipi_db(ffffffff838a4ff0) 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
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 sys/kern/kern_lock.c:173
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209
syscall(ffff80002a35e080) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80002a35e080) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76827b28da10, count: -7
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: 7
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: -8
---
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#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: 177cf78f1bc3 RFC5321 specifies max-rcpt to be >= 100 as a ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12d63016580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=9900933c9453de1fc3b0
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8587b7aca98d/disk-177cf78f.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/84da0ccb597a/bsd-177cf78f.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/be6130e79e1e/kernel-177cf78f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+990093...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "anon->an_lock == amap->am_lock" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_fault.c", line 968
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*255966 15375 0 0 0 1 syz-executor
289146 43202 0 0x2 0x1 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: 7
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: kernel diagnostic assertion "anon->an_lock == amap->am_lock" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_fault.c", line 968
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000373b7740
rbx 0xffff8000299bee07
rdx 0
rcx 0xffff8000fffef4d8
rax 0xffff8000299bdff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xbb963d7d7e13a4ee
r11 0xb12942e43da8441b
r12 0xffff8000299bec08
r13 0
r14 0
r15 0x1
rip 0xffffffff81e6e4e5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff8000373b7730
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=255966 pid=15375 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=78, usrpri=79, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffee7e0,0xffff8000fffee2c0
process=0xffff80003c3f5d00 user=0xffff8000373b2000, vmspace=0xfffffd80780d7d70
estcpu=29, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
98631 360797 93625 0 2 0 syz-executor
93968 144515 43202 0 2 0 syz-executor
93968 176763 43202 0 2 0x4000000 syz-executor
93968 153313 43202 0 2 0x4000000 syz-executor
*15375 255966 41629 0 7 0 syz-executor
15375 19644 41629 0 3 0x4000080 fsleep syz-executor
25737 441024 91443 0 2 0 syz-executor
25737 45558 91443 0 3 0x4000080 fsleep syz-executor
81912 363024 80757 0 2 0 syz-executor
81912 11464 80757 0 2 0x4000000 syz-executor
75337 363043 87502 0 2 0 syz-executor
75337 203320 87502 0 3 0x4000080 fsleep syz-executor
75337 287307 87502 0 2 0x4000000 syz-executor
32727 470592 85605 0 2 0 syz-executor
32727 320604 85605 0 3 0x4000080 fsleep syz-executor
32727 400356 85605 0 3 0x4000080 fsleep syz-executor
91085 388233 0 0 3 0x14200 acct acct
56917 53133 95351 0 3 0x3000 suspend syz-executor
56917 29187 95351 0 2 0x4081000 syz-executor
93625 367509 83429 0 2 0xc82 syz-executor
80757 300800 83429 0 2 0xc82 syz-executor
43202 289146 83429 0 7 0x3 syz-executor
87502 408829 83429 0 2 0xc82 syz-executor
95351 355271 83429 0 3 0x82 wait syz-executor
85605 427267 83429 0 2 0xc82 syz-executor
91443 78173 83429 0 2 0xc82 syz-executor
41629 254117 83429 0 2 0xc82 syz-executor
83429 375302 57182 0 3 0x82 kqread syz-executor
57182 152594 116 0 3 0x10008a sigsusp ksh
116 117822 38063 0 3 0x98 kqread sshd-session
38063 181363 48570 0 3 0x92 kqread sshd-session
47688 70549 1 0 3 0x100083 ttyin getty
48570 101427 1 0 3 0x88 kqread sshd
51596 190646 98764 74 3 0x1100092 bpf pflogd
98764 127995 1 0 3 0x80 sbwait pflogd
60368 463708 83605 73 3 0x1100090 kqread syslogd
83605 113160 1 0 3 0x100082 sbwait syslogd
28776 265963 1 0 3 0x100080 kqread resolvd
30016 426061 63414 77 3 0x100092 kqread dhcpleased
3598 395228 63414 77 3 0x100092 kqread dhcpleased
63414 290701 1 0 3 0x80 kqread dhcpleased
21587 338372 0 0 3 0x14200 bored smr
45684 134164 0 0 2 0x14200 zerothread
86191 320333 0 0 3 0x14200 aiodoned aiodoned
62668 453497 0 0 3 0x14200 syncer update
22273 350843 0 0 3 0x14200 cleaner cleaner
58328 435092 0 0 3 0x14200 reaper reaper
25645 18665 0 0 3 0x14200 pgdaemon pagedaemon
85882 108872 0 0 3 0x14200 bored viomb
14146 105765 0 0 3 0x40014200 acpi0 acpi0
22507 403212 0 0 3 0x40014200 idle1
99523 244586 0 0 3 0x14200 bored softnet1
61220 231936 0 0 3 0x14200 bored softnet0
26658 329997 0 0 3 0x14200 bored systqmp
60529 349220 0 0 3 0x14200 bored systq
48026 294799 0 0 3 0x14200 tmoslp softclockmp
15916 429940 0 0 3 0x40014200 tmoslp softclock
26553 332751 0 0 3 0x40014200 idle0
1 194660 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 15375 (syz-executor) thread 0xffff8000fffef4d8 (255966)
shared rwlock amaplk r = 0 (0xfffffd806f46c458)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#6 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd80780d7e70)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
Process 56917 (syz-executor) thread 0xffff8000333b0a88 (29187)
exclusive rrwlock inode r = 0 (0xfffffd806bae0b30)
#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 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:570
#5 vn_write+0x18f sys/kern/vfs_vnops.c:405
#6 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#7 sys_write+0xa2 sys/kern/sys_generic.c:300
#8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11063 12089K 12303K 166960K 12415 0
pcb 17 12K 12K 166960K 42 0
rtable 252 8K 8K 166960K 400 0
pf 34 17K 81K 166960K 58 0
ifaddr 43 7K 7K 166960K 54 0
ifgroup 55 2K 2K 166960K 71 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 88 0
ioctlops 0 0K 4K 166960K 1521 0
iov 0 0K 16K 166960K 9 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1387 87K 88K 166960K 1621 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 6 0K 0K 166960K 7 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 89K 166960K 266 0
sigio 0 0K 0K 166960K 1 0
proc 72 115K 147K 166960K 564 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 29 0
in_multi 99 7K 7K 166960K 110 0
ether_multi 1 0K 0K 166960K 1 0
mrt 1 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 67 307K 307K 166960K 67 0
exec 0 0K 1K 166960K 412 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 233 167K 181K 166960K 4416 0
UVM aobj 9 6K 6K 166960K 10 0
pinsyscall 43 86K 102K 166960K 1433 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 13 0
NDP 12 0K 2K 166960K 34 0
temp 36 9070K 9138K 166960K 12858 0
kqueue 13 20K 28K 166960K 49 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 48 0 43 1 0 1 1 0 8 0
rtentry 176 114 0 4 6 1 5 6 0 8 0
unpcb 144 129 0 112 2 1 1 2 0 8 0
syncache 336 3 0 3 1 1 0 1 0 8 0
tcpcb 736 40 0 36 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 169 0 161 2 0 2 2 0 8 0
nd6 152 25 0 1 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 7 0 7 2 1 1 1 0 8 1
pppxif 1504 2 0 2 1 1 0 1 0 8 0
pffrag 232 6 0 1 1 0 1 1 0 482 0
pffrnode 88 5 0 1 1 0 1 1 0 8 0
pffrent 40 7 0 2 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 1 0 1 1 1 0 1 0 8 0
pfstitem 24 27 0 0 1 0 1 1 0 8 0
pfstkey 128 27 0 0 1 0 1 1 0 8 0
pfstate 448 27 0 0 3 0 3 3 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 256 459 0 6 29 0 29 29 0 8 0
art_table 40 460 0 6 5 0 5 5 0 8 0
art_node 32 114 0 14 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0
semapl 112 5 0 1 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 1906 0 441 93 0 93 93 0 8 0
ffsino 296 1906 0 441 114 0 114 114 0 8 0
nchpl 144 2271 0 577 64 0 64 64 0 8 0
vnodes 216 2137 0 0 119 0 119 119 0 8 0
namei 1024 7390 0 7390 2 1 1 1 0 8 1
percpumem 16 59 0 9 1 0 1 1 0 8 0
vcpupl 3968 3 0 1 1 0 1 1 0 8 0
vmpool 848 3 0 1 1 0 1 1 0 8 0
kstatmem 264 36 0 10 3 1 2 3 0 8 0
scxspl 216 9755 0 9755 10 2 8 8 1 8 8
plimitpl 152 51 0 32 1 0 1 1 0 8 0
sigapl 424 589 0 540 7 1 6 7 0 8 0
knotepl 120 305 0 0 10 0 10 10 0 8 0
kqueuepl 224 64 0 55 1 0 1 1 0 8 0
pipepl 344 135 0 108 3 0 3 3 0 8 0
fdescpl 528 571 0 539 3 0 3 3 0 8 0
filepl 160 2654 0 2438 17 6 11 17 0 8 0
lockfpl 104 65 0 61 1 0 1 1 0 8 0
lockfspl 48 30 0 26 1 0 1 1 0 8 0
sessionpl 144 22 0 13 1 0 1 1 0 8 0
pgrppl 48 32 0 15 1 0 1 1 0 8 0
ucredpl 104 389 0 376 1 0 1 1 0 8 0
zombiepl 144 541 0 540 1 0 1 1 0 8 0
processpl 1232 589 0 540 5 0 5 5 0 8 0
procpl 664 827 0 768 6 0 6 6 0 8 0
sockpl 752 358 0 328 8 3 5 7 0 8 2
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 24 0 0 3 0 3 3 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 180 0 0 12 0 12 12 0 8 0
bufpl 280 3676 0 105 256 0 256 256 0 8 0
anonpl 32 6428 0 0 52 0 52 52 0 246 0
anonpl: pool(0xffffffff8395e858:anonpl): page inconsistency: page 0x0; at page head addr 0xfffffd806c3a5f90 (p 0xfffffd806c3a5000)
amapchunkpl 152 12858 0 12332 31 4 27 31 0 158 0
amappl16 200 2377 0 2212 11 2 9 9 0 8 0
amappl15 192 4 0 4 1 1 0 1 0 8 0
amappl14 184 439 0 438 1 0 1 1 0 8 0
amappl13 176 120 0 108 1 0 1 1 0 8 0
amappl12 168 822 0 792 2 0 2 2 0 8 0
amappl11 160 62 0 61 1 0 1 1 0 8 0
amappl10 152 68 0 54 1 0 1 1 0 8 0
amappl9 144 262 0 262 1 1 0 1 0 8 0
amappl8 136 147 0 145 1 0 1 1 0 8 0
amappl7 128 125 0 123 1 0 1 1 0 8 0
amappl6 120 266 0 254 1 0 1 1 0 8 0
amappl5 112 89 0 79 1 0 1 1 0 8 0
amappl4 104 475 0 435 2 0 2 2 0 8 0
amappl3 96 2096 0 2010 4 1 3 3 0 8 0
amappl2 88 642 0 574 2 0 2 2 0 8 0
amappl1 80 9779 0 9184 14 0 14 14 0 8 0
amappl 88 3666 0 3505 5 0 5 5 0 92 0
uvmvnodes 80 103 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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 571 0 539 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 571 0 539 1 0 1 1 0 8 0
vmmpekpl 168 6401 0 6368 2 0 2 2 0 8 0
vmmpepl 168 44416 0 42331 93 1 92 92 0 357 0
vmsppl 488 570 0 539 5 1 4 5 0 8 0
rwobjpl 80 15603 0 14439 25 1 24 24 0 8 0
pdppl 4096 1155 0 1082 102 28 74 83 0 8 1
pvpl 32 14426 0 0 118 1 117 117 0 265 0
pmappl 256 573 0 540 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 275 0 33 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff838a4ff0) 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
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 sys/kern/kern_lock.c:173
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209
syscall(ffff80002a35e080) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80002a35e080) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76827b28da10, count: 8
ddb{0}> trace
x86_ipi_db(ffffffff838a4ff0) 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
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83aae480) at __mp_lock+0x192 sys/kern/kern_lock.c:173
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff8000fffef240,5b,0,ffff80002a35dfd0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209
syscall(ffff80002a35e080) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80002a35e080) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76827b28da10, count: -7
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: 7
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83443430) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff83482b80,ffffffff833dcb8e,3c8,ffffffff833bee5b) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_fault_upper_lookup(ffff8000373b79c0,ffff8000373b79f8,ffff8000373b78c0,ffff8000373b7940) at uvm_fault_upper_lookup+0x3cd sys/uvm/uvm_fault.c:937
uvm_fault(fffffd80780d7d70,7c213fbe000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff8000373b7b60,7c213fbeef8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000373b7b60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74ec04791170, count: -8
---
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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
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