Hello,
syzbot found the following crash on:
HEAD commit: c43b2f19 Correct several issues in the current TLSv1.3 ser..
git tree: openbsd
console output:
https://syzkaller.appspot.com/x/log.txt?x=15f79369e00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link:
https://syzkaller.appspot.com/bug?extid=63868e0cc599fc473ef0
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by:
syzbot+63868e...@syzkaller.appspotmail.com
panic: amap_wipeout: corrupt amap
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*280790 80392 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821e0bad) at panic+0x15c sys/kern/subr_prf.c:207
amap_wipeout(fffffd805615aa38) at amap_wipeout+0x208 sys/uvm/uvm_amap.c:447
uvm_unmap_detach(ffff80001d33c630,1) at uvm_unmap_detach+0x163 sys/uvm/uvm_map.c:1582
uvm_map_teardown(fffffd806bc0a550) at uvm_map_teardown+0x22c sys/uvm/uvm_map.c:2757
uvmspace_free(fffffd806bc0a550) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3611
uvm_exit(ffff80001d39e380) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297
reaper(ffff80001d2f25f0) at reaper+0x15c sys/kern/kern_exit.c:443
end trace frame: 0x0, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
amap_wipeout: corrupt amap
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821e0bad) at panic+0x15c sys/kern/subr_prf.c:207
amap_wipeout(fffffd805615aa38) at amap_wipeout+0x208 sys/uvm/uvm_amap.c:447
uvm_unmap_detach(ffff80001d33c630,1) at uvm_unmap_detach+0x163 sys/uvm/uvm_map.c:1582
uvm_map_teardown(fffffd806bc0a550) at uvm_map_teardown+0x22c sys/uvm/uvm_map.c:2757
uvmspace_free(fffffd806bc0a550) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3611
uvm_exit(ffff80001d39e380) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297
reaper(ffff80001d2f25f0) at reaper+0x15c sys/kern/kern_exit.c:443
end trace frame: 0x0, count: -8
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80001d33c4b0
rbx 0xffff80001d33c560
rdx 0x2
rcx 0
rax 0
r8 0xffff80001d33c470
r9 0x1
r10 0
r11 0x6a4a4d753f761bbf
r12 0x3000000008
r13 0xffff80001d33c4c0
r14 0x100
r15 0x1
rip 0xffffffff8156f0e8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80001d33c4a0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (reaper) pid=280790 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff80001d2f2380,0xffff80001d2f2d50
process=0xffff8000ffffc008 user=0xffff80001d337000, vmspace=0xffffffff8258bdb8
estcpu=1, cpticks=4, pctcpu=0.0
user=0, sys=4, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18095 128361 0 0 3 0x14200 bored sosplice
98793 391112 1 0 2 0x82 syz-executor.1
72856 314210 1 0 2 0x82 syz-executor.0
69312 97707 24102 0 3 0x10008a pause ksh
24102 38468 12369 0 2 0x12 sshd
24415 432291 1 0 3 0x100083 ttyin getty
12369 333991 1 0 3 0x80 select sshd
11845 125140 81803 73 3 0x100090 kqread syslogd
81803 54513 1 0 3 0x100082 netio syslogd
23124 80834 1 77 3 0x100090 poll dhclient
68165 270934 1 0 3 0x80 poll dhclient
8562 481680 0 0 2 0x14200 zerothread
59647 39090 0 0 3 0x14200 aiodoned aiodoned
86604 427597 0 0 3 0x14200 syncer update
46033 35515 0 0 3 0x14200 cleaner cleaner
*80392 280790 0 0 7 0x14200 reaper
45855 438267 0 0 3 0x14200 pgdaemon pagedaemon
20233 52397 0 0 3 0x14200 bored crynlk
44421 439652 0 0 3 0x14200 bored crypto
4095 385254 0 0 3 0x40014200 acpi0 acpi0
56888 259556 0 0 2 0x14200 softnet
80267 458187 0 0 3 0x14200 bored systqmp
8450 222704 0 0 3 0x14200 bored systq
12787 442614 0 0 3 0x40014200 bored softclock
90082 40911 0 0 3 0x40014200 idle0
44951 77271 0 0 3 0x14200 bored smr
1 353684 0 0 2 0x82 init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9481 6343K 6859K 78643K 10963 0
pcb 13 8K 8K 78643K 57 0
rtable 105 3K 3K 78643K 242 0
ifaddr 61 13K 13K 78643K 85 0
counters 19 16K 16K 78643K 19 0
ioctlops 0 0K 2K 78643K 21 0
iov 0 0K 12K 78643K 18 0
mount 1 1K 1K 78643K 1 0
vnodes 1221 77K 77K 78643K 1346 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 76 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1794 195K 288K 78643K 12646 0
file desc 3 8K 25K 78643K 216 0
sigio 0 0K 0K 78643K 24 0
proc 48 38K 63K 78643K 378 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 12 0
in_multi 46 2K 2K 78643K 66 0
ether_multi 1 0K 0K 78643K 8 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 203 0
pfkey data 0 0K 1K 78643K 2 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 92 20K 23K 78643K 1394 0
UVM aobj 6 2K 2K 78643K 6 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 50 0
NDP 9 0K 0K 78643K 16 0
temp 106 3010K 3074K 78643K 10613 0
kqueue 2 2K 32K 78643K 79 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
rtpcb 80 37 0 35 1 0 1 1 0 8 0
rtentry 112 50 0 6 2 0 2 2 0 8 0
unpcb 120 112 0 104 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpqe 32 107 0 107 1 1 0 1 0 8 0
tcpcb 544 173 0 169 2 0 2 2 0 8 1
inpcb 280 341 0 334 4 1 3 3 0 8 2
nd6 48 4 0 0 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 220 0 3 14 0 14 14 0 8 0
art_table 32 222 0 3 2 0 2 2 0 8 0
art_node 16 49 0 10 1 0 1 1 0 8 0
sysvmsgpl 40 28 0 13 1 0 1 1 0 8 0
semupl 112 4 0 4 2 1 1 1 0 8 1
semapl 112 74 0 64 1 0 1 1 0 8 0
shmpl 112 4 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1684 0 285 46 0 46 46 0 8 0
ffsino 240 1684 0 285 83 0 83 83 0 8 0
nchpl 144 2240 0 631 60 0 60 60 0 8 0
uvmvnodes 72 1818 0 0 34 0 34 34 0 8 0
vnodes 208 1818 0 0 96 0 96 96 0 8 0
namei 1024 5879 0 5879 1 0 1 1 0 8 1
scxspl 192 6215 0 6215 1 0 1 1 0 8 1
plimitpl 152 34 0 27 1 0 1 1 0 8 0
sigapl 432 387 0 376 2 0 2 2 0 8 0
futexpl 56 4970 0 4970 1 0 1 1 0 8 1
knotepl 112 187 0 182 2 0 2 2 0 8 1
kqueuepl 104 169 0 168 1 0 1 1 0 8 0
pipelkpl 16 123 0 113 1 0 1 1 0 8 0
pipepl 120 246 0 233 1 0 1 1 0 8 0
fdescpl 432 388 0 376 2 0 2 2 0 8 0
filepl 120 2657 0 2574 5 0 5 5 0 8 2
lockfpl 104 59 0 58 1 0 1 1 0 8 0
lockfspl 48 20 0 19 1 0 1 1 0 8 0
sessionpl 112 17 0 7 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 278 0 271 1 0 1 1 0 8 0
zombiepl 144 376 0 375 1 0 1 1 0 8 0
processpl 896 403 0 375 4 0 4 4 0 8 0
procpl 624 701 0 673 5 1 4 4 0 8 0
sosppl 128 2 0 2 1 0 1 1 0 8 1
sockpl 400 494 0 477 5 0 5 5 0 8 3
mcl64k 65536 6 0 6 2 1 1 1 0 8 1
mcl16k 16384 2 0 2 2 1 1 1 0 8 1
mcl12k 12288 6 0 6 2 1 1 1 0 8 1
mcl9k 9216 3 0 3 2 1 1 1 0 8 1
mcl8k 8192 8 0 8 2 1 1 1 0 8 1
mcl4k 4096 29 0 29 2 1 1 1 0 8 1
mcl2k 2048 64655 0 64609 16 9 7 15 0 8 0
mtagpl 80 12 0 2 2 1 1 1 0 8 0
mbufpl 256 103554 0 103442 11 3 8 9 0 8 0
bufpl 280 6760 0 1327 389 0 389 389 0 8 0
anonpl 16 51696 0 43949 80 1 79 79 0 107 14
amapchunkpl 152 1967 0 1867 13 6 7 13 0 158 1
amappl16 192 1900 0 1525 55 9 46 55 0 8 8
amappl15 184 50 0 46 1 0 1 1 0 8 0
amappl14 176 117 0 115 1 0 1 1 0 8 0
amappl13 168 1 0 0 1 0 1 1 0 8 0
amappl12 160 101 0 100 2 1 1 1 0 8 0
amappl11 152 45 0 34 1 0 1 1 0 8 0
amappl10 144 21 0 18 1 0 1 1 0 8 0
amappl9 136 557 0 554 1 0 1 1 0 8 0
amappl8 128 115 0 95 1 0 1 1 0 8 0
amappl7 120 92 0 81 1 0 1 1 0 8 0
amappl6 112 54 0 48 1 0 1 1 0 8 0
amappl5 104 230 0 220 1 0 1 1 0 8 0
amappl4 96 604 0 579 1 0 1 1 0 8 0
amappl3 88 213 0 205 1 0 1 1 0 8 0
amappl2 80 2307 0 2249 3 1 2 3 0 8 0
amappl1 72 16755 0 16352 26 16 10 20 0 8 0
amappl 80 922 0 887 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 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 64 5 0 0 1 0 1 1 0 8 0
uaddrrnd 24 388 0 376 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 388 0 376 1 0 1 1 0 8 0
vmmpekpl 168 6679 0 6651 2 0 2 2 0 8 0
vmmpepl 168 53836 0 52516 117 21 96 109 0 357 13
vmsppl 272 387 0 375 2 1 1 2 0 8 0
pdppl 4096 782 0 750 6 1 5 6 0 8 0
pvpl 32 164666 0 161721 186 0 186 186 0 265 148
pmappl 200 387 0 375 1 0 1 1 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 160 0 21 5 0 5 5 0 8 0
---
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