panic: amap_wipeout: corrupt amap (2)
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syzbot
Dec 18, 2025, 10:24:28 PM (5 hours ago) Dec 18
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3f23c8878a83 Consolidate backing swap clusters & get rid o..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16e58984580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=e6dc4c1c2feae6efc26f
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0598b60a2e46/disk-3f23c887.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/e2decb4e5b40/bsd-3f23c887.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6960025e1f50/kernel-3f23c887.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e6dc4c...@syzkaller.appspotmail.com
panic: amap_wipeout: corrupt amap
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
304853 67231 0 0 0 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, 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: amap_wipeout: corrupt amap
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, count: -9
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002efc1ff0
rbx 0xffff8000299dee07
rdx 0
rcx 0xffff80003c44e7f8
rax 0xffff8000299ddff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x40a38bf5281e09b5
r11 0xf377509939cc729a
r12 0xffff8000299dec08
r13 0
r14 0
r15 0x1
rip 0xffffffff8174fac5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002efc1fe0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=42612 pid=97899 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=0xffff80003c44e7f8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c44e2c8,0xffff80003c414800
process=0xffff8000fffe5370 user=0xffff80002efbd000, vmspace=0xfffffd800f37f7d0
estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
67231 304853 11980 0 7 0 syz-executor
67231 488495 11980 0 2 0x4000000 syz-executor
7760 94813 13971 0 2 0 syz-executor
47582 197044 24728 0 2 0 syz-executor
47582 267556 24728 0 3 0x4000080 fsleep syz-executor
75899 93137 89458 60928 2 0x10 syz-executor
75899 409348 89458 60928 3 0x4000090 fsleep syz-executor
70214 354978 45698 0 2 0 syz-executor
70214 57370 45698 0 3 0x4000080 fsleep syz-executor
70214 343475 45698 0 2 0x4000000 syz-executor
45698 398083 69613 0 3 0x82 nanoslp syz-executor
35195 159868 1 0 3 0x100083 ttyin getty
40861 139446 0 0 3 0x14280 nfsidl nfsio
90638 380281 0 0 3 0x14280 nfsidl nfsio
9207 504802 0 0 3 0x14280 nfsidl nfsio
1297 162324 0 0 3 0x14280 nfsidl nfsio
81611 399016 0 0 3 0x14280 nfsidl nfsio
47191 263463 0 0 3 0x14280 nfsidl nfsio
2483 246036 0 0 3 0x14280 nfsidl nfsio
95281 483523 0 0 3 0x14280 nfsidl nfsio
19700 289101 0 0 3 0x14280 nfsidl nfsio
15383 113100 0 0 3 0x14280 nfsidl nfsio
18897 186100 0 0 3 0x14280 nfsidl nfsio
35411 496030 0 0 3 0x14280 nfsidl nfsio
69137 143707 0 0 3 0x14280 nfsidl nfsio
89586 261122 0 0 3 0x14280 nfsidl nfsio
47520 170494 0 0 3 0x14280 nfsidl nfsio
18805 222540 0 0 3 0x14280 nfsidl nfsio
77609 65183 0 0 3 0x14280 nfsidl nfsio
39171 10087 0 0 3 0x14280 nfsidl nfsio
77304 158387 0 0 3 0x14280 nfsidl nfsio
33046 511462 0 0 3 0x14280 nfsidl nfsio
13971 52763 69613 0 3 0x82 nanoslp syz-executor
4320 459665 69613 0 3 0x82 nanoslp syz-executor
24728 433050 69613 0 3 0x82 nanoslp syz-executor
11980 516357 69613 0 3 0x82 nanoslp syz-executor
92619 465116 69613 0 3 0x82 wait syz-executor
36581 390416 69613 0 3 0x82 wait syz-executor
89458 370030 69613 0 3 0x82 nanoslp syz-executor
69613 121953 76271 0 2 0x2 syz-executor
76271 417119 81779 0 3 0x10008a sigsusp ksh
81779 144026 28925 0 3 0x98 kqread sshd-session
28925 181798 11278 0 3 0x92 kqread sshd-session
11278 463211 1 0 3 0x88 kqread sshd
72850 413435 431 74 3 0x1100092 bpf pflogd
431 116086 1 0 3 0x80 sbwait pflogd
62261 338050 18701 73 3 0x1100090 kqread syslogd
18701 227836 1 0 3 0x100082 sbwait syslogd
95681 277389 1 0 3 0x100080 kqread resolvd
42436 470317 6362 77 3 0x100092 kqread dhcpleased
92225 302273 6362 77 3 0x100092 kqread dhcpleased
6362 297181 1 0 3 0x80 kqread dhcpleased
79974 197312 0 0 3 0x14200 bored smr
93904 484847 0 0 2 0x14200 zerothread
95687 194142 0 0 3 0x14200 aiodoned aiodoned
21816 61891 0 0 3 0x14200 syncer update
83103 498913 0 0 3 0x14200 cleaner cleaner
19361 94310 0 0 3 0x14200 reaper reaper
93888 395633 0 0 3 0x14200 pgdaemon pagedaemon
23010 402911 0 0 3 0x14200 bored viomb
22080 496486 0 0 3 0x40014200 acpi0 acpi0
10389 170019 0 0 3 0x40014200 idle1
4507 193709 0 0 3 0x14200 bored softnet1
90613 265511 0 0 3 0x14200 bored softnet0
13891 170275 0 0 3 0x14200 bored systqmp
59745 441880 0 0 3 0x14200 bored systq
81186 505259 0 0 3 0x14200 tmoslp softclockmp
28072 29305 0 0 3 0x40014200 tmoslp softclock
37446 371282 0 0 3 0x40014200 idle0
1 510856 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 67231 (syz-executor) thread 0xffff80002a261240 (488495)
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10207 11032K 11549K 166960K 13310 0
pcb 17 13K 14K 166960K 180 0
rtable 210 13K 13K 166960K 536 0
pf 34 17K 21K 166960K 109 0
ifaddr 38 6K 7K 166960K 89 0
ifgroup 55 2K 2K 166960K 125 0
sysctl 4 1K 9K 166960K 54 0
counters 70 37K 37K 166960K 154 0
ioctlops 0 0K 4K 166960K 1717 0
iov 0 0K 24K 166960K 52 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1524 96K 96K 166960K 2344 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 6K 166960K 15 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 23 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 106K 166960K 1003 0
sigio 0 0K 0K 166960K 19 0
proc 73 115K 163K 166960K 678 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 96 0
in_multi 77 5K 7K 166960K 157 0
ether_multi 1 0K 0K 166960K 8 0
mrt 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 103 466K 466K 166960K 103 0
exec 0 0K 1K 166960K 605 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 239 167K 191K 166960K 10585 0
UVM aobj 15 6K 6K 166960K 16 0
pinsyscall 42 84K 106K 166960K 2181 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 44 0
NDP 12 0K 2K 166960K 60 0
temp 60 8675K 8755K 166960K 39153 0
kqueue 13 20K 30K 166960K 167 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 82 0 79 1 0 1 1 0 8 0
rtentry 176 158 0 76 6 1 5 6 0 8 0
unpcb 144 525 0 506 4 2 2 3 0 8 1
syncache 336 6 0 6 2 2 0 1 0 8 0
tcpqe 32 2 0 2 1 1 0 1 0 8 0
tcpcb 736 296 0 290 7 5 2 4 0 8 1
arp 136 26 0 12 1 0 1 1 0 8 0
inpcb 328 906 0 897 15 8 7 7 0 8 6
nd6 152 32 0 12 1 0 1 1 0 8 0
pkpcb 40 4 0 4 2 1 1 1 0 8 1
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1192 35 0 35 1 0 1 1 0 8 1
pppxif 1504 4 0 4 2 1 1 1 0 8 1
pffrag 232 7 0 1 1 0 1 1 0 482 0
pffrnode 88 6 0 1 1 0 1 1 0 8 0
pffrent 40 19 0 13 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
pfstitem 24 59 0 20 1 0 1 1 0 8 0
pfstkey 128 59 0 20 2 0 2 2 0 8 0
pfstate 448 59 0 20 6 0 6 6 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 649 0 281 30 5 25 29 0 8 1
art_table 40 651 0 281 5 0 5 5 0 8 0
art_node 32 156 0 85 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 19 0 9 1 0 1 1 0 8 0
shmpl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 26 0 9 3 0 3 3 0 8 0
dino2pl 256 3068 0 1559 95 0 95 95 0 8 0
ffsino 296 3068 0 1559 117 0 117 117 0 8 0
nchpl 144 4388 0 2685 64 0 64 64 0 8 0
rtmask 32 7 0 7 3 2 1 1 0 8 1
vnodes 216 3872 0 0 216 0 216 216 0 8 0
namei 1024 14735 0 14734 3 2 1 2 0 8 0
percpumem 16 92 0 42 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 80 0 52 4 1 3 3 0 8 1
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 2 0 2 2 2 0 1 0 8 0
scxspl 216 21322 0 21322 10 6 4 8 1 8 4
plimitpl 152 293 0 275 1 0 1 1 0 8 0
sigapl 424 1322 0 1254 9 1 8 8 0 8 0
knotepl 120 554 0 0 17 0 17 17 0 8 0
kqueuepl 224 313 0 304 4 2 2 3 0 8 1
pipepl 344 180 0 153 3 0 3 3 0 8 0
fdescpl 528 1286 0 1255 3 0 3 3 0 8 0
filepl 160 6917 0 6696 18 5 13 15 0 8 2
lockfpl 104 692 0 690 3 1 2 2 0 8 1
lockfspl 48 271 0 269 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 108 0 91 1 0 1 1 0 8 0
ucredpl 104 794 0 780 1 0 1 1 0 8 0
zombiepl 144 1257 0 1254 2 1 1 1 0 8 0
processpl 1232 1322 0 1254 7 1 6 6 0 8 0
procpl 664 2642 0 2569 9 1 8 8 0 8 0
sosppl 176 8 0 8 2 1 1 1 0 8 1
sockpl 752 1539 0 1508 19 9 10 11 0 8 6
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 132 0 0 17 0 17 17 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 31 0 0 4 0 4 4 0 8 0
mtagpl 96 38 0 0 1 0 1 1 0 8 0
mbufpl 256 320 0 0 20 0 20 20 0 8 0
bufpl 280 9951 0 3815 439 0 439 439 0 8 0
anonpl 32 9902 0 0 80 0 80 80 0 246 0
anonpl: pool(0xffffffff83a06d98:anonpl): page inconsistency: page 0x0; at page head addr 0xfffffd806cacef90 (p 0xfffffd806cace000)
amapchunkpl 152 35733 0 35264 46 13 33 33 0 158 9
amappl16 200 4024 0 3986 35 23 12 17 0 8 4
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 8 0 8 1 1 0 1 0 8 0
amappl13 176 448 0 447 1 0 1 1 0 8 0
amappl12 168 1660 0 1619 3 0 3 3 0 8 0
amappl11 160 35 0 35 1 1 0 1 0 8 0
amappl10 152 55 0 40 1 0 1 1 0 8 0
amappl9 144 253 0 253 1 1 0 1 0 8 0
amappl8 136 28 0 25 1 0 1 1 0 8 0
amappl7 128 83 0 82 1 0 1 1 0 8 0
amappl6 120 316 0 302 1 0 1 1 0 8 0
amappl5 112 78 0 67 1 0 1 1 0 8 0
amappl4 104 430 0 399 1 0 1 1 0 8 0
amappl3 96 6957 0 6857 6 2 4 4 0 8 1
amappl2 88 556 0 497 2 0 2 2 0 8 0
amappl1 80 12937 0 12344 16 2 14 15 0 8 0
amappl 88 9674 0 9514 5 0 5 5 0 92 0
uvmvnodes 80 131 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 128 254 0 254 2 2 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 15 0 1 1 0 1 1 0 8 0
uaddrrnd 24 1287 0 1256 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1287 0 1256 1 0 1 1 0 8 0
vmmpekpl 168 11412 0 11371 3 0 3 3 0 8 0
vmmpepl 168 86264 0 84332 112 16 96 100 0 357 1
vmsppl 488 1286 0 1255 7 2 5 5 0 8 0
rwobjpl 80 24559 0 23492 30 2 28 28 0 8 1
pdppl 4096 2587 0 2514 109 35 74 85 0 8 1
pvpl 32 19030 0 0 154 0 154 154 0 265 0
pmappl 256 1289 0 1256 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 307 0 51 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8389eff0) 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: 0x77ee170f6d00, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff8389eff0) 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: 0x77ee170f6d00, count: -3
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(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, count: 6
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, count: -9
---
This report is generated by a bot. It may contain errors.
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syzbot engineers can be reached at syzk...@googlegroups.com.
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If the report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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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
syzbot found the following issue on:
HEAD commit: 3f23c8878a83 Consolidate backing swap clusters & get rid o..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16e58984580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=e6dc4c1c2feae6efc26f
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0598b60a2e46/disk-3f23c887.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/e2decb4e5b40/bsd-3f23c887.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6960025e1f50/kernel-3f23c887.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e6dc4c...@syzkaller.appspotmail.com
panic: amap_wipeout: corrupt amap
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
304853 67231 0 0 0 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, 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: amap_wipeout: corrupt amap
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, count: -9
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002efc1ff0
rbx 0xffff8000299dee07
rdx 0
rcx 0xffff80003c44e7f8
rax 0xffff8000299ddff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x40a38bf5281e09b5
r11 0xf377509939cc729a
r12 0xffff8000299dec08
r13 0
r14 0
r15 0x1
rip 0xffffffff8174fac5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002efc1fe0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=42612 pid=97899 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=0xffff80003c44e7f8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c44e2c8,0xffff80003c414800
process=0xffff8000fffe5370 user=0xffff80002efbd000, vmspace=0xfffffd800f37f7d0
estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
67231 304853 11980 0 7 0 syz-executor
67231 488495 11980 0 2 0x4000000 syz-executor
7760 94813 13971 0 2 0 syz-executor
47582 197044 24728 0 2 0 syz-executor
47582 267556 24728 0 3 0x4000080 fsleep syz-executor
75899 93137 89458 60928 2 0x10 syz-executor
75899 409348 89458 60928 3 0x4000090 fsleep syz-executor
70214 354978 45698 0 2 0 syz-executor
70214 57370 45698 0 3 0x4000080 fsleep syz-executor
70214 343475 45698 0 2 0x4000000 syz-executor
45698 398083 69613 0 3 0x82 nanoslp syz-executor
35195 159868 1 0 3 0x100083 ttyin getty
40861 139446 0 0 3 0x14280 nfsidl nfsio
90638 380281 0 0 3 0x14280 nfsidl nfsio
9207 504802 0 0 3 0x14280 nfsidl nfsio
1297 162324 0 0 3 0x14280 nfsidl nfsio
81611 399016 0 0 3 0x14280 nfsidl nfsio
47191 263463 0 0 3 0x14280 nfsidl nfsio
2483 246036 0 0 3 0x14280 nfsidl nfsio
95281 483523 0 0 3 0x14280 nfsidl nfsio
19700 289101 0 0 3 0x14280 nfsidl nfsio
15383 113100 0 0 3 0x14280 nfsidl nfsio
18897 186100 0 0 3 0x14280 nfsidl nfsio
35411 496030 0 0 3 0x14280 nfsidl nfsio
69137 143707 0 0 3 0x14280 nfsidl nfsio
89586 261122 0 0 3 0x14280 nfsidl nfsio
47520 170494 0 0 3 0x14280 nfsidl nfsio
18805 222540 0 0 3 0x14280 nfsidl nfsio
77609 65183 0 0 3 0x14280 nfsidl nfsio
39171 10087 0 0 3 0x14280 nfsidl nfsio
77304 158387 0 0 3 0x14280 nfsidl nfsio
33046 511462 0 0 3 0x14280 nfsidl nfsio
13971 52763 69613 0 3 0x82 nanoslp syz-executor
4320 459665 69613 0 3 0x82 nanoslp syz-executor
24728 433050 69613 0 3 0x82 nanoslp syz-executor
11980 516357 69613 0 3 0x82 nanoslp syz-executor
92619 465116 69613 0 3 0x82 wait syz-executor
36581 390416 69613 0 3 0x82 wait syz-executor
89458 370030 69613 0 3 0x82 nanoslp syz-executor
69613 121953 76271 0 2 0x2 syz-executor
76271 417119 81779 0 3 0x10008a sigsusp ksh
81779 144026 28925 0 3 0x98 kqread sshd-session
28925 181798 11278 0 3 0x92 kqread sshd-session
11278 463211 1 0 3 0x88 kqread sshd
72850 413435 431 74 3 0x1100092 bpf pflogd
431 116086 1 0 3 0x80 sbwait pflogd
62261 338050 18701 73 3 0x1100090 kqread syslogd
18701 227836 1 0 3 0x100082 sbwait syslogd
95681 277389 1 0 3 0x100080 kqread resolvd
42436 470317 6362 77 3 0x100092 kqread dhcpleased
92225 302273 6362 77 3 0x100092 kqread dhcpleased
6362 297181 1 0 3 0x80 kqread dhcpleased
79974 197312 0 0 3 0x14200 bored smr
93904 484847 0 0 2 0x14200 zerothread
95687 194142 0 0 3 0x14200 aiodoned aiodoned
21816 61891 0 0 3 0x14200 syncer update
83103 498913 0 0 3 0x14200 cleaner cleaner
19361 94310 0 0 3 0x14200 reaper reaper
93888 395633 0 0 3 0x14200 pgdaemon pagedaemon
23010 402911 0 0 3 0x14200 bored viomb
22080 496486 0 0 3 0x40014200 acpi0 acpi0
10389 170019 0 0 3 0x40014200 idle1
4507 193709 0 0 3 0x14200 bored softnet1
90613 265511 0 0 3 0x14200 bored softnet0
13891 170275 0 0 3 0x14200 bored systqmp
59745 441880 0 0 3 0x14200 bored systq
81186 505259 0 0 3 0x14200 tmoslp softclockmp
28072 29305 0 0 3 0x40014200 tmoslp softclock
37446 371282 0 0 3 0x40014200 idle0
1 510856 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 67231 (syz-executor) thread 0xffff80002a261240 (488495)
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10207 11032K 11549K 166960K 13310 0
pcb 17 13K 14K 166960K 180 0
rtable 210 13K 13K 166960K 536 0
pf 34 17K 21K 166960K 109 0
ifaddr 38 6K 7K 166960K 89 0
ifgroup 55 2K 2K 166960K 125 0
sysctl 4 1K 9K 166960K 54 0
counters 70 37K 37K 166960K 154 0
ioctlops 0 0K 4K 166960K 1717 0
iov 0 0K 24K 166960K 52 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1524 96K 96K 166960K 2344 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 6K 166960K 15 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 23 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 106K 166960K 1003 0
sigio 0 0K 0K 166960K 19 0
proc 73 115K 163K 166960K 678 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 96 0
in_multi 77 5K 7K 166960K 157 0
ether_multi 1 0K 0K 166960K 8 0
mrt 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 103 466K 466K 166960K 103 0
exec 0 0K 1K 166960K 605 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 239 167K 191K 166960K 10585 0
UVM aobj 15 6K 6K 166960K 16 0
pinsyscall 42 84K 106K 166960K 2181 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 44 0
NDP 12 0K 2K 166960K 60 0
temp 60 8675K 8755K 166960K 39153 0
kqueue 13 20K 30K 166960K 167 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 82 0 79 1 0 1 1 0 8 0
rtentry 176 158 0 76 6 1 5 6 0 8 0
unpcb 144 525 0 506 4 2 2 3 0 8 1
syncache 336 6 0 6 2 2 0 1 0 8 0
tcpqe 32 2 0 2 1 1 0 1 0 8 0
tcpcb 736 296 0 290 7 5 2 4 0 8 1
arp 136 26 0 12 1 0 1 1 0 8 0
inpcb 328 906 0 897 15 8 7 7 0 8 6
nd6 152 32 0 12 1 0 1 1 0 8 0
pkpcb 40 4 0 4 2 1 1 1 0 8 1
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1192 35 0 35 1 0 1 1 0 8 1
pppxif 1504 4 0 4 2 1 1 1 0 8 1
pffrag 232 7 0 1 1 0 1 1 0 482 0
pffrnode 88 6 0 1 1 0 1 1 0 8 0
pffrent 40 19 0 13 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
pfstitem 24 59 0 20 1 0 1 1 0 8 0
pfstkey 128 59 0 20 2 0 2 2 0 8 0
pfstate 448 59 0 20 6 0 6 6 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 649 0 281 30 5 25 29 0 8 1
art_table 40 651 0 281 5 0 5 5 0 8 0
art_node 32 156 0 85 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 19 0 9 1 0 1 1 0 8 0
shmpl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 26 0 9 3 0 3 3 0 8 0
dino2pl 256 3068 0 1559 95 0 95 95 0 8 0
ffsino 296 3068 0 1559 117 0 117 117 0 8 0
nchpl 144 4388 0 2685 64 0 64 64 0 8 0
rtmask 32 7 0 7 3 2 1 1 0 8 1
vnodes 216 3872 0 0 216 0 216 216 0 8 0
namei 1024 14735 0 14734 3 2 1 2 0 8 0
percpumem 16 92 0 42 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 80 0 52 4 1 3 3 0 8 1
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 2 0 2 2 2 0 1 0 8 0
scxspl 216 21322 0 21322 10 6 4 8 1 8 4
plimitpl 152 293 0 275 1 0 1 1 0 8 0
sigapl 424 1322 0 1254 9 1 8 8 0 8 0
knotepl 120 554 0 0 17 0 17 17 0 8 0
kqueuepl 224 313 0 304 4 2 2 3 0 8 1
pipepl 344 180 0 153 3 0 3 3 0 8 0
fdescpl 528 1286 0 1255 3 0 3 3 0 8 0
filepl 160 6917 0 6696 18 5 13 15 0 8 2
lockfpl 104 692 0 690 3 1 2 2 0 8 1
lockfspl 48 271 0 269 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 108 0 91 1 0 1 1 0 8 0
ucredpl 104 794 0 780 1 0 1 1 0 8 0
zombiepl 144 1257 0 1254 2 1 1 1 0 8 0
processpl 1232 1322 0 1254 7 1 6 6 0 8 0
procpl 664 2642 0 2569 9 1 8 8 0 8 0
sosppl 176 8 0 8 2 1 1 1 0 8 1
sockpl 752 1539 0 1508 19 9 10 11 0 8 6
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 0 0 1 0 1 1 0 8 0
mcl4k 4096 132 0 0 17 0 17 17 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 31 0 0 4 0 4 4 0 8 0
mtagpl 96 38 0 0 1 0 1 1 0 8 0
mbufpl 256 320 0 0 20 0 20 20 0 8 0
bufpl 280 9951 0 3815 439 0 439 439 0 8 0
anonpl 32 9902 0 0 80 0 80 80 0 246 0
anonpl: pool(0xffffffff83a06d98:anonpl): page inconsistency: page 0x0; at page head addr 0xfffffd806cacef90 (p 0xfffffd806cace000)
amapchunkpl 152 35733 0 35264 46 13 33 33 0 158 9
amappl16 200 4024 0 3986 35 23 12 17 0 8 4
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 8 0 8 1 1 0 1 0 8 0
amappl13 176 448 0 447 1 0 1 1 0 8 0
amappl12 168 1660 0 1619 3 0 3 3 0 8 0
amappl11 160 35 0 35 1 1 0 1 0 8 0
amappl10 152 55 0 40 1 0 1 1 0 8 0
amappl9 144 253 0 253 1 1 0 1 0 8 0
amappl8 136 28 0 25 1 0 1 1 0 8 0
amappl7 128 83 0 82 1 0 1 1 0 8 0
amappl6 120 316 0 302 1 0 1 1 0 8 0
amappl5 112 78 0 67 1 0 1 1 0 8 0
amappl4 104 430 0 399 1 0 1 1 0 8 0
amappl3 96 6957 0 6857 6 2 4 4 0 8 1
amappl2 88 556 0 497 2 0 2 2 0 8 0
amappl1 80 12937 0 12344 16 2 14 15 0 8 0
amappl 88 9674 0 9514 5 0 5 5 0 92 0
uvmvnodes 80 131 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 128 254 0 254 2 2 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 15 0 1 1 0 1 1 0 8 0
uaddrrnd 24 1287 0 1256 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1287 0 1256 1 0 1 1 0 8 0
vmmpekpl 168 11412 0 11371 3 0 3 3 0 8 0
vmmpepl 168 86264 0 84332 112 16 96 100 0 357 1
vmsppl 488 1286 0 1255 7 2 5 5 0 8 0
rwobjpl 80 24559 0 23492 30 2 28 28 0 8 1
pdppl 4096 2587 0 2514 109 35 74 85 0 8 1
pvpl 32 19030 0 0 154 0 154 154 0 265 0
pmappl 256 1289 0 1256 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 307 0 51 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8389eff0) 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: 0x77ee170f6d00, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff8389eff0) 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: 0x77ee170f6d00, count: -3
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(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, count: 6
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198
amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470
uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525
exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7da1b3572b40, count: -9
---
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