panic: mutex ADDR not held in mtx_leave
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syzbot
Oct 20, 2024, 11:44:34 PM10/20/24
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: e432ca3c48ac try to simplify the locking code around busy ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14041c87980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=121dab8faf86b47e5bce
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2cd4b0c96082/disk-e432ca3c.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a48cad20fda4/bsd-e432ca3c.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f9797235839e/kernel-e432ca3c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+121dab...@syzkaller.appspotmail.com
panic: mutex 0xfffffd806c80af30 not hWeAldRN iInNG m:t xS_PlLe aNve
OTSta rLtOWEiRnEgD O Ns tacSkY SCAtLrL ac7e5. .5.3
6870912 EXIT 0 a
Stopped at savectx+0xae: movl $0,%gs:0x680
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*209821 90829 0 0 0x4000000 0 syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x2cca4ecd790, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu1: mutex 0xfffffd806c80af30 not held in mtx_leave
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x2cca4ecd790, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002cfc06d0
rbx 0
rdx 0xffff8000012b3040
rcx 0xffff800033792038
rax 0x3a
r8 0xffff80002cfc0600
r9 0x1
r10 0x1bf43e4ab65575a3
r11 0xf447ac8bf194df2
r12 0
r13 0
r14 0xffff800033792038
r15 0
rip 0xffffffff826903ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80002cfc0650
ss 0x10
savectx+0xae: movl $0,%gs:0x680
ddb{0}> show proc
PROC (syz-executor) tid=209821 pid=90829 tcnt=3 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800033792ce0,0xffff8000337922d0
process=0xffff800029fe96b0 user=0xffff80002cfbb000, vmspace=0xfffffd806c80ae18
estcpu=33, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
98117 130600 53066 0 2 0 syz-executor
98117 60843 53066 0 3 0x4000080 fsleep syz-executor
98117 40429 53066 0 3 0x4000080 fsleep syz-executor
90829 196062 8884 0 2 0 syz-executor
90829 125898 8884 0 3 0x4000020 syz-executor
*90829 209821 8884 0 7 0x4000000 syz-executor
2364 133621 53572 0 2 0 syz-executor
2364 384533 53572 0 3 0x4000080 fsleep syz-executor
54674 367956 70624 0 2 0 syz-executor
54674 237906 70624 0 3 0x4000080 fsleep syz-executor
70177 149805 62776 60929 2 0x10 syz-executor
70177 193106 62776 60929 3 0x4000090 fsleep syz-executor
70177 402606 62776 60929 3 0x4000090 fsleep syz-executor
70624 264675 80720 0 2 0x482 syz-executor
4660 518759 80720 0 2 0x82 syz-executor
53572 187114 80720 0 2 0x482 syz-executor
62957 223978 80720 0 2 0x482 syz-executor
8884 47770 80720 0 2 0x482 syz-executor
53066 19180 80720 0 3 0x82 nanoslp syz-executor
62776 496925 80720 0 3 0x82 nanoslp syz-executor
68584 239402 80720 0 2 0x2 syz-executor
9746 15123 0 0 3 0x14200 bored sosplice
25015 378144 0 0 3 0x14280 nfsidl nfsio
58667 52585 0 0 3 0x14280 nfsidl nfsio
3509 431688 0 0 3 0x14280 nfsidl nfsio
89004 135326 0 0 3 0x14280 nfsidl nfsio
8872 195237 0 0 3 0x14280 nfsidl nfsio
40522 301919 0 0 3 0x14280 nfsidl nfsio
24293 224268 0 0 3 0x14280 nfsidl nfsio
75457 119006 0 0 3 0x14280 nfsidl nfsio
75726 274809 0 0 3 0x14280 nfsidl nfsio
6413 133455 0 0 3 0x14280 nfsidl nfsio
80646 28899 0 0 3 0x14280 nfsidl nfsio
15471 120540 0 0 3 0x14280 nfsidl nfsio
94707 497443 0 0 3 0x14280 nfsidl nfsio
24018 417865 0 0 3 0x14280 nfsidl nfsio
33095 218655 0 0 3 0x14280 nfsidl nfsio
11196 193742 0 0 3 0x14280 nfsidl nfsio
6632 155726 0 0 3 0x14280 nfsidl nfsio
97843 310672 0 0 3 0x14280 nfsidl nfsio
98087 254678 0 0 3 0x14280 nfsidl nfsio
73741 213380 0 0 3 0x14280 nfsidl nfsio
80720 157090 11524 0 2 0x82 syz-executor
11524 211835 80018 0 3 0x10008a sigsusp ksh
80018 288214 83956 0 3 0x98 kqread sshd-session
83956 498838 53135 0 3 0x92 kqread sshd-session
33169 152314 1 0 3 0x100083 ttyin getty
53135 454757 1 0 3 0x88 kqread sshd
38498 266390 26991 74 3 0x1100092 bpf pflogd
26991 335774 1 0 3 0x80 sbwait pflogd
36823 1249 42576 73 3 0x1100090 kqread syslogd
42576 121401 1 0 3 0x100082 sbwait syslogd
850 337012 1 0 3 0x100080 kqread resolvd
36614 499432 95793 77 3 0x100092 kqread dhcpleased
30575 230705 95793 77 3 0x100092 kqread dhcpleased
95793 248332 1 0 3 0x80 kqread dhcpleased
76798 94772 0 0 3 0x14200 bored smr
69317 362599 0 0 2 0x14200 zerothread
81955 347317 0 0 3 0x14200 aiodoned aiodoned
66408 243775 0 0 3 0x14200 syncer update
73568 202074 0 0 3 0x14200 cleaner cleaner
5400 444531 0 0 3 0x14200 reaper reaper
77587 127259 0 0 3 0x14200 pgdaemon pagedaemon
85142 428273 0 0 3 0x14200 bored viomb
19337 85940 0 0 3 0x40014200 acpi0 acpi0
35243 52673 0 0 3 0x40014200 idle1
7899 116777 0 0 3 0x14200 bored softnet3
58680 383010 0 0 3 0x14200 bored softnet2
56635 496963 0 0 3 0x14200 bored softnet1
22888 346961 0 0 3 0x14200 bored softnet0
25290 83393 0 0 3 0x14200 bored systqmp
76958 256403 0 0 3 0x14200 bored systq
14036 213768 0 0 3 0x14200 tmoslp softclockmp
58724 485579 0 0 3 0x40014200 tmoslp softclock
30784 35923 0 0 3 0x40014200 idle0
1 488823 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8069dcf4f0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_page_remove+0xcd rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_page_remove+0xcd pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#3 pmap_page_remove+0xcd sys/arch/amd64/amd64/pmap.c:1974
#4 uvm_map_clean+0x630 sys/uvm/uvm_map.c:4534
#5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#6 Xsyscall+0x128
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff834f86a0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 uvm_map_clean+0x602 sys/uvm/uvm_map.c:4528
#4 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#4 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#5 Xsyscall+0x128
CPU 1:
exclusive mutex &map->flags_lock r = 0 (0xfffffd806c80af70)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 vm_map_lock_ln+0x6b sys/uvm/uvm_map.c:5244
#4 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779
#5 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
#5 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710
#6 uvm_fault+0x112 sys/uvm/uvm_fault.c:600
#7 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
#8 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
#9 alltraps_kern_meltdown+0x7b
#10 _copyin+0x57
#11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#12 Xsyscall+0x128
Process 90829 (syz-executor) thread 0xffff800033792038 (209821)
Process 68584 (syz-executor) thread 0xffff80002a06ccc0 (239402)
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10196 11113K 11308K 166960K 11764 0
pcb 17 12K 12K 166960K 119 0
rtable 209 7K 8K 166960K 1193 0
pf 36 18K 25K 166960K 141 0
ifaddr 40 7K 8K 166960K 159 0
ifgroup 55 2K 2K 166960K 193 0
sysctl 4 1K 2K 166960K 6 0
counters 64 36K 36K 166960K 136 0
ioctlops 0 0K 4K 166960K 1569 0
iov 0 0K 16K 166960K 24 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1363 86K 86K 166960K 2100 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 7 0
VM map 2 1K 1K 166960K 2 0
sem 14 5K 6K 166960K 29 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1690 195K 286K 166960K 12468 0
file desc 15 53K 97K 166960K 2746 0
sigio 0 0K 0K 166960K 11 0
proc 72 91K 128K 166960K 1264 0
subproc 104 6K 6K 166960K 417 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 77 0
in_multi 85 6K 7K 166960K 392 0
ether_multi 1 0K 0K 166960K 8 0
mrt 0 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 91 413K 413K 166960K 91 0
exec 0 0K 1K 166960K 702 0
pfkey data 0 0K 0K 166960K 3 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 224 72K 90K 166960K 23334 0
UVM aobj 11 2K 4K 166960K 13 0
pinsyscall 40 80K 116K 166960K 4444 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 29 0
NDP 12 0K 2K 166960K 112 0
temp 43 6815K 6884K 166960K 37642 0
kqueue 13 20K 26K 166960K 94 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 161 0 158 1 0 1 1 0 8 0
rtentry 112 394 0 301 4 0 4 4 0 8 0
unpcb 144 295 0 278 1 0 1 1 0 8 0
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpcb 808 150 0 146 1 0 1 1 0 8 0
arp 120 70 0 51 1 0 1 1 0 8 0
inpcb 336 646 0 638 3 1 2 2 0 8 1
nd6 136 103 0 82 2 1 1 2 0 8 0
pkpcb 40 8 0 8 2 2 0 1 0 8 0
kcovpl 48 32 0 24 1 0 1 1 0 8 0
ppxss 1168 4 0 4 2 1 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 14 0 12 1 0 1 1 0 482 0
pffrnode 88 12 0 10 1 0 1 1 0 8 0
pffrent 40 26 0 24 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
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pfstitem 24 126 0 68 1 0 1 1 0 8 0
pfstkey 128 128 0 70 3 0 3 3 0 8 0
pfstate 376 127 0 69 7 0 7 7 0 8 0
pfrule 1344 24 0 18 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 1581 0 1202 32 3 29 31 0 8 1
art_table 32 1583 0 1202 4 0 4 4 0 8 0
art_node 16 392 0 310 1 0 1 1 0 8 0
sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 23 0 11 1 0 1 1 0 8 0
shmpl 112 10 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 4360 0 2815 97 0 97 97 0 8 0
ffsino 272 4360 0 2815 104 0 104 104 0 8 0
nchpl 144 6966 0 5256 64 0 64 64 0 8 0
uvmvnodes 80 5003 0 0 103 0 103 103 0 8 0
vnodes 216 5003 0 0 278 0 278 278 0 8 0
namei 1024 19390 0 19390 6 5 1 2 0 8 1
percpumem 16 82 0 36 1 0 1 1 0 8 0
kstatmem 264 96 0 72 2 0 2 2 0 8 0
scxspl 216 31483 0 31483 10 9 1 8 1 8 1
plimitpl 152 133 0 113 1 0 1 1 0 8 0
sigapl 424 3019 0 2949 11 2 9 9 0 8 0
futexpl 64 8122 0 8116 4 3 1 1 0 8 0
knotepl 120 357 0 0 10 0 10 10 0 8 0
kqueuepl 216 126 0 116 1 0 1 1 0 8 0
pipepl 320 205 0 178 3 0 3 3 0 8 0
fdescpl 496 2979 0 2950 9 4 5 6 0 8 0
filepl 152 6632 0 6383 11 0 11 11 0 8 1
lockfpl 104 201 0 198 1 0 1 1 0 8 0
lockfspl 48 87 0 84 1 0 1 1 0 8 0
sessionpl 144 47 0 38 1 0 1 1 0 8 0
pgrppl 48 83 0 66 1 0 1 1 0 8 0
ucredpl 104 666 0 650 1 0 1 1 0 8 0
zombiepl 144 2951 0 2949 3 2 1 1 0 8 0
processpl 1160 3019 0 2949 7 1 6 6 0 8 0
procpl 648 5345 0 5267 8 0 8 8 0 8 0
srpgc 96 2 0 2 1 0 1 1 0 8 1
sockpl 664 1115 0 1088 4 1 3 4 0 8 0
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 16 0 0 2 0 2 2 0 8 0
mcl9k 9216 14 0 0 1 0 1 1 0 8 0
mcl8k 8192 22 0 0 3 0 3 3 0 8 0
mcl4k 4096 144 0 0 18 0 18 18 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 23 0 0 3 0 3 3 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 301 0 0 17 0 17 17 0 8 0
bufpl 280 8777 0 2603 442 0 442 442 0 8 0
anonpl 24 360442 0 355783 54 6 48 51 0 185 14
amapchunkpl 152 75735 0 75271 37 9 28 32 0 158 6
amappl16 200 6342 0 6251 36 28 8 14 0 8 1
amappl15 192 11 0 11 1 1 0 1 0 8 0
amappl14 184 167 0 155 1 0 1 1 0 8 0
amappl13 176 16 0 14 1 0 1 1 0 8 0
amappl12 168 4007 0 3978 4 2 2 3 0 8 0
amappl11 160 55 0 41 1 0 1 1 0 8 0
amappl10 152 23 0 23 1 1 0 1 0 8 0
amappl9 144 163 0 163 1 1 0 1 0 8 0
amappl8 136 21 0 18 1 0 1 1 0 8 0
amappl7 128 156 0 144 1 0 1 1 0 8 0
amappl6 120 408 0 406 1 0 1 1 0 8 0
amappl5 112 246 0 235 1 0 1 1 0 8 0
amappl4 104 403 0 384 1 0 1 1 0 8 0
amappl3 96 16565 0 16460 5 1 4 4 0 8 0
amappl2 88 1020 0 953 2 0 2 2 0 8 0
amappl1 80 16994 0 16431 18 4 14 16 0 8 0
amappl 88 22755 0 22594 5 0 5 5 0 92 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 2 0 2 2 2 0 1 0 8 0
dma2048 2048 1 0 1 1 0 1 1 0 8 1
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma512 512 1 0 1 1 0 1 1 0 8 1
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 19 0 18 1 0 1 1 0 8 0
aobjpl 72 12 0 2 1 0 1 1 0 8 0
uaddrrnd 24 2979 0 2950 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2979 0 2950 1 0 1 1 0 8 0
vmmpekpl 168 15092 0 15042 3 0 3 3 0 8 0
vmmpepl 168 172447 0 170616 119 31 88 93 0 357 3
vmsppl 448 2978 0 2950 6 2 4 5 0 8 0
rwobjpl 56 46465 0 40464 91 5 86 86 0 8 0
pdppl 4096 5965 0 5900 157 86 71 87 0 8 6
pvpl 32 29020 0 0 236 2 234 234 0 265 0
pmappl 248 2978 0 2950 5 2 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 469 0 103 11 0 11 11 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x2cca4ecd790, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc
db_search_symbol(ffffffff827c7250,0,ffff80002cfb96a0) at db_search_symbol+0x52 sys/ddb/db_sym.c:106
db_stack_trace_print(ffff80002cfb9770,1,100,ffffffff830310f8,ffffffff827c7870) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147
db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243
panic(ffffffff830777cb) at panic+0x1d0 sys/kern/subr_prf.c:229
mtx_leave(fffffd806c80af30) at mtx_leave+0x17c sys/kern/kern_lock.c:335
msleep(fffffd806c80ae48,fffffd806c80af30,4,ffffffff832017c0,0) at msleep+0x125 sys/kern/kern_synch.c:249
vm_map_lock_ln(fffffd806c80ae18,ffffffff8303c0ac,6f3) at vm_map_lock_ln+0xd4 sys/uvm/uvm_map.c:5250
uvmfault_lookup(ffff80002cfb9b50,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710
uvm_fault(fffffd806c80ae18,20830000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600
end trace frame: 0xffff80002cfb9c90, count: 0
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc
db_search_symbol(ffffffff827c7250,0,ffff80002cfb96a0) at db_search_symbol+0x52 sys/ddb/db_sym.c:106
db_stack_trace_print(ffff80002cfb9770,1,100,ffffffff830310f8,ffffffff827c7870) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147
db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243
panic(ffffffff830777cb) at panic+0x1d0 sys/kern/subr_prf.c:229
mtx_leave(fffffd806c80af30) at mtx_leave+0x17c sys/kern/kern_lock.c:335
msleep(fffffd806c80ae48,fffffd806c80af30,4,ffffffff832017c0,0) at msleep+0x125 sys/kern/kern_synch.c:249
vm_map_lock_ln(fffffd806c80ae18,ffffffff8303c0ac,6f3) at vm_map_lock_ln+0xd4 sys/uvm/uvm_map.c:5250
uvmfault_lookup(ffff80002cfb9b50,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710
uvm_fault(fffffd806c80ae18,20830000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600
kpageflttrap(ffff80002cfb9cf0,20830000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002cfb9cf0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x57
syscall(ffff80002cfba140) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002cfba140) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2cd3fa9f680, count: -20
---
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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: e432ca3c48ac try to simplify the locking code around busy ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14041c87980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=121dab8faf86b47e5bce
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2cd4b0c96082/disk-e432ca3c.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/a48cad20fda4/bsd-e432ca3c.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f9797235839e/kernel-e432ca3c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+121dab...@syzkaller.appspotmail.com
panic: mutex 0xfffffd806c80af30 not hWeAldRN iInNG m:t xS_PlLe aNve
OTSta rLtOWEiRnEgD O Ns tacSkY SCAtLrL ac7e5. .5.3
6870912 EXIT 0 a
Stopped at savectx+0xae: movl $0,%gs:0x680
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*209821 90829 0 0 0x4000000 0 syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x2cca4ecd790, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu1: mutex 0xfffffd806c80af30 not held in mtx_leave
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x2cca4ecd790, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002cfc06d0
rbx 0
rdx 0xffff8000012b3040
rcx 0xffff800033792038
rax 0x3a
r8 0xffff80002cfc0600
r9 0x1
r10 0x1bf43e4ab65575a3
r11 0xf447ac8bf194df2
r12 0
r13 0
r14 0xffff800033792038
r15 0
rip 0xffffffff826903ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80002cfc0650
ss 0x10
savectx+0xae: movl $0,%gs:0x680
ddb{0}> show proc
PROC (syz-executor) tid=209821 pid=90829 tcnt=3 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800033792ce0,0xffff8000337922d0
process=0xffff800029fe96b0 user=0xffff80002cfbb000, vmspace=0xfffffd806c80ae18
estcpu=33, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
98117 130600 53066 0 2 0 syz-executor
98117 60843 53066 0 3 0x4000080 fsleep syz-executor
98117 40429 53066 0 3 0x4000080 fsleep syz-executor
90829 196062 8884 0 2 0 syz-executor
90829 125898 8884 0 3 0x4000020 syz-executor
*90829 209821 8884 0 7 0x4000000 syz-executor
2364 133621 53572 0 2 0 syz-executor
2364 384533 53572 0 3 0x4000080 fsleep syz-executor
54674 367956 70624 0 2 0 syz-executor
54674 237906 70624 0 3 0x4000080 fsleep syz-executor
70177 149805 62776 60929 2 0x10 syz-executor
70177 193106 62776 60929 3 0x4000090 fsleep syz-executor
70177 402606 62776 60929 3 0x4000090 fsleep syz-executor
70624 264675 80720 0 2 0x482 syz-executor
4660 518759 80720 0 2 0x82 syz-executor
53572 187114 80720 0 2 0x482 syz-executor
62957 223978 80720 0 2 0x482 syz-executor
8884 47770 80720 0 2 0x482 syz-executor
53066 19180 80720 0 3 0x82 nanoslp syz-executor
62776 496925 80720 0 3 0x82 nanoslp syz-executor
68584 239402 80720 0 2 0x2 syz-executor
9746 15123 0 0 3 0x14200 bored sosplice
25015 378144 0 0 3 0x14280 nfsidl nfsio
58667 52585 0 0 3 0x14280 nfsidl nfsio
3509 431688 0 0 3 0x14280 nfsidl nfsio
89004 135326 0 0 3 0x14280 nfsidl nfsio
8872 195237 0 0 3 0x14280 nfsidl nfsio
40522 301919 0 0 3 0x14280 nfsidl nfsio
24293 224268 0 0 3 0x14280 nfsidl nfsio
75457 119006 0 0 3 0x14280 nfsidl nfsio
75726 274809 0 0 3 0x14280 nfsidl nfsio
6413 133455 0 0 3 0x14280 nfsidl nfsio
80646 28899 0 0 3 0x14280 nfsidl nfsio
15471 120540 0 0 3 0x14280 nfsidl nfsio
94707 497443 0 0 3 0x14280 nfsidl nfsio
24018 417865 0 0 3 0x14280 nfsidl nfsio
33095 218655 0 0 3 0x14280 nfsidl nfsio
11196 193742 0 0 3 0x14280 nfsidl nfsio
6632 155726 0 0 3 0x14280 nfsidl nfsio
97843 310672 0 0 3 0x14280 nfsidl nfsio
98087 254678 0 0 3 0x14280 nfsidl nfsio
73741 213380 0 0 3 0x14280 nfsidl nfsio
80720 157090 11524 0 2 0x82 syz-executor
11524 211835 80018 0 3 0x10008a sigsusp ksh
80018 288214 83956 0 3 0x98 kqread sshd-session
83956 498838 53135 0 3 0x92 kqread sshd-session
33169 152314 1 0 3 0x100083 ttyin getty
53135 454757 1 0 3 0x88 kqread sshd
38498 266390 26991 74 3 0x1100092 bpf pflogd
26991 335774 1 0 3 0x80 sbwait pflogd
36823 1249 42576 73 3 0x1100090 kqread syslogd
42576 121401 1 0 3 0x100082 sbwait syslogd
850 337012 1 0 3 0x100080 kqread resolvd
36614 499432 95793 77 3 0x100092 kqread dhcpleased
30575 230705 95793 77 3 0x100092 kqread dhcpleased
95793 248332 1 0 3 0x80 kqread dhcpleased
76798 94772 0 0 3 0x14200 bored smr
69317 362599 0 0 2 0x14200 zerothread
81955 347317 0 0 3 0x14200 aiodoned aiodoned
66408 243775 0 0 3 0x14200 syncer update
73568 202074 0 0 3 0x14200 cleaner cleaner
5400 444531 0 0 3 0x14200 reaper reaper
77587 127259 0 0 3 0x14200 pgdaemon pagedaemon
85142 428273 0 0 3 0x14200 bored viomb
19337 85940 0 0 3 0x40014200 acpi0 acpi0
35243 52673 0 0 3 0x40014200 idle1
7899 116777 0 0 3 0x14200 bored softnet3
58680 383010 0 0 3 0x14200 bored softnet2
56635 496963 0 0 3 0x14200 bored softnet1
22888 346961 0 0 3 0x14200 bored softnet0
25290 83393 0 0 3 0x14200 bored systqmp
76958 256403 0 0 3 0x14200 bored systq
14036 213768 0 0 3 0x14200 tmoslp softclockmp
58724 485579 0 0 3 0x40014200 tmoslp softclock
30784 35923 0 0 3 0x40014200 idle0
1 488823 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8069dcf4f0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_page_remove+0xcd rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_page_remove+0xcd pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#3 pmap_page_remove+0xcd sys/arch/amd64/amd64/pmap.c:1974
#4 uvm_map_clean+0x630 sys/uvm/uvm_map.c:4534
#5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#6 Xsyscall+0x128
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff834f86a0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 uvm_map_clean+0x602 sys/uvm/uvm_map.c:4528
#4 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#4 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#5 Xsyscall+0x128
CPU 1:
exclusive mutex &map->flags_lock r = 0 (0xfffffd806c80af70)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 vm_map_lock_ln+0x6b sys/uvm/uvm_map.c:5244
#4 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779
#5 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
#5 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710
#6 uvm_fault+0x112 sys/uvm/uvm_fault.c:600
#7 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
#8 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
#9 alltraps_kern_meltdown+0x7b
#10 _copyin+0x57
#11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#12 Xsyscall+0x128
Process 90829 (syz-executor) thread 0xffff800033792038 (209821)
Process 68584 (syz-executor) thread 0xffff80002a06ccc0 (239402)
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10196 11113K 11308K 166960K 11764 0
pcb 17 12K 12K 166960K 119 0
rtable 209 7K 8K 166960K 1193 0
pf 36 18K 25K 166960K 141 0
ifaddr 40 7K 8K 166960K 159 0
ifgroup 55 2K 2K 166960K 193 0
sysctl 4 1K 2K 166960K 6 0
counters 64 36K 36K 166960K 136 0
ioctlops 0 0K 4K 166960K 1569 0
iov 0 0K 16K 166960K 24 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1363 86K 86K 166960K 2100 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 7 0
VM map 2 1K 1K 166960K 2 0
sem 14 5K 6K 166960K 29 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1690 195K 286K 166960K 12468 0
file desc 15 53K 97K 166960K 2746 0
sigio 0 0K 0K 166960K 11 0
proc 72 91K 128K 166960K 1264 0
subproc 104 6K 6K 166960K 417 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 77 0
in_multi 85 6K 7K 166960K 392 0
ether_multi 1 0K 0K 166960K 8 0
mrt 0 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 91 413K 413K 166960K 91 0
exec 0 0K 1K 166960K 702 0
pfkey data 0 0K 0K 166960K 3 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 224 72K 90K 166960K 23334 0
UVM aobj 11 2K 4K 166960K 13 0
pinsyscall 40 80K 116K 166960K 4444 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 29 0
NDP 12 0K 2K 166960K 112 0
temp 43 6815K 6884K 166960K 37642 0
kqueue 13 20K 26K 166960K 94 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 161 0 158 1 0 1 1 0 8 0
rtentry 112 394 0 301 4 0 4 4 0 8 0
unpcb 144 295 0 278 1 0 1 1 0 8 0
syncache 336 4 0 4 2 1 1 1 0 8 1
tcpcb 808 150 0 146 1 0 1 1 0 8 0
arp 120 70 0 51 1 0 1 1 0 8 0
inpcb 336 646 0 638 3 1 2 2 0 8 1
nd6 136 103 0 82 2 1 1 2 0 8 0
pkpcb 40 8 0 8 2 2 0 1 0 8 0
kcovpl 48 32 0 24 1 0 1 1 0 8 0
ppxss 1168 4 0 4 2 1 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 14 0 12 1 0 1 1 0 482 0
pffrnode 88 12 0 10 1 0 1 1 0 8 0
pffrent 40 26 0 24 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
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pfstitem 24 126 0 68 1 0 1 1 0 8 0
pfstkey 128 128 0 70 3 0 3 3 0 8 0
pfstate 376 127 0 69 7 0 7 7 0 8 0
pfrule 1344 24 0 18 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 1581 0 1202 32 3 29 31 0 8 1
art_table 32 1583 0 1202 4 0 4 4 0 8 0
art_node 16 392 0 310 1 0 1 1 0 8 0
sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 23 0 11 1 0 1 1 0 8 0
shmpl 112 10 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 4360 0 2815 97 0 97 97 0 8 0
ffsino 272 4360 0 2815 104 0 104 104 0 8 0
nchpl 144 6966 0 5256 64 0 64 64 0 8 0
uvmvnodes 80 5003 0 0 103 0 103 103 0 8 0
vnodes 216 5003 0 0 278 0 278 278 0 8 0
namei 1024 19390 0 19390 6 5 1 2 0 8 1
percpumem 16 82 0 36 1 0 1 1 0 8 0
kstatmem 264 96 0 72 2 0 2 2 0 8 0
scxspl 216 31483 0 31483 10 9 1 8 1 8 1
plimitpl 152 133 0 113 1 0 1 1 0 8 0
sigapl 424 3019 0 2949 11 2 9 9 0 8 0
futexpl 64 8122 0 8116 4 3 1 1 0 8 0
knotepl 120 357 0 0 10 0 10 10 0 8 0
kqueuepl 216 126 0 116 1 0 1 1 0 8 0
pipepl 320 205 0 178 3 0 3 3 0 8 0
fdescpl 496 2979 0 2950 9 4 5 6 0 8 0
filepl 152 6632 0 6383 11 0 11 11 0 8 1
lockfpl 104 201 0 198 1 0 1 1 0 8 0
lockfspl 48 87 0 84 1 0 1 1 0 8 0
sessionpl 144 47 0 38 1 0 1 1 0 8 0
pgrppl 48 83 0 66 1 0 1 1 0 8 0
ucredpl 104 666 0 650 1 0 1 1 0 8 0
zombiepl 144 2951 0 2949 3 2 1 1 0 8 0
processpl 1160 3019 0 2949 7 1 6 6 0 8 0
procpl 648 5345 0 5267 8 0 8 8 0 8 0
srpgc 96 2 0 2 1 0 1 1 0 8 1
sockpl 664 1115 0 1088 4 1 3 4 0 8 0
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 16 0 0 2 0 2 2 0 8 0
mcl9k 9216 14 0 0 1 0 1 1 0 8 0
mcl8k 8192 22 0 0 3 0 3 3 0 8 0
mcl4k 4096 144 0 0 18 0 18 18 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 23 0 0 3 0 3 3 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 301 0 0 17 0 17 17 0 8 0
bufpl 280 8777 0 2603 442 0 442 442 0 8 0
anonpl 24 360442 0 355783 54 6 48 51 0 185 14
amapchunkpl 152 75735 0 75271 37 9 28 32 0 158 6
amappl16 200 6342 0 6251 36 28 8 14 0 8 1
amappl15 192 11 0 11 1 1 0 1 0 8 0
amappl14 184 167 0 155 1 0 1 1 0 8 0
amappl13 176 16 0 14 1 0 1 1 0 8 0
amappl12 168 4007 0 3978 4 2 2 3 0 8 0
amappl11 160 55 0 41 1 0 1 1 0 8 0
amappl10 152 23 0 23 1 1 0 1 0 8 0
amappl9 144 163 0 163 1 1 0 1 0 8 0
amappl8 136 21 0 18 1 0 1 1 0 8 0
amappl7 128 156 0 144 1 0 1 1 0 8 0
amappl6 120 408 0 406 1 0 1 1 0 8 0
amappl5 112 246 0 235 1 0 1 1 0 8 0
amappl4 104 403 0 384 1 0 1 1 0 8 0
amappl3 96 16565 0 16460 5 1 4 4 0 8 0
amappl2 88 1020 0 953 2 0 2 2 0 8 0
amappl1 80 16994 0 16431 18 4 14 16 0 8 0
amappl 88 22755 0 22594 5 0 5 5 0 92 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 2 0 2 2 2 0 1 0 8 0
dma2048 2048 1 0 1 1 0 1 1 0 8 1
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma512 512 1 0 1 1 0 1 1 0 8 1
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 19 0 18 1 0 1 1 0 8 0
aobjpl 72 12 0 2 1 0 1 1 0 8 0
uaddrrnd 24 2979 0 2950 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2979 0 2950 1 0 1 1 0 8 0
vmmpekpl 168 15092 0 15042 3 0 3 3 0 8 0
vmmpepl 168 172447 0 170616 119 31 88 93 0 357 3
vmsppl 448 2978 0 2950 6 2 4 5 0 8 0
rwobjpl 56 46465 0 40464 91 5 86 86 0 8 0
pdppl 4096 5965 0 5900 157 86 71 87 0 8 6
pvpl 32 29020 0 0 236 2 234 234 0 265 0
pmappl 248 2978 0 2950 5 2 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 469 0 103 11 0 11 11 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x2cca4ecd790, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc
db_search_symbol(ffffffff827c7250,0,ffff80002cfb96a0) at db_search_symbol+0x52 sys/ddb/db_sym.c:106
db_stack_trace_print(ffff80002cfb9770,1,100,ffffffff830310f8,ffffffff827c7870) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147
db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243
panic(ffffffff830777cb) at panic+0x1d0 sys/kern/subr_prf.c:229
mtx_leave(fffffd806c80af30) at mtx_leave+0x17c sys/kern/kern_lock.c:335
msleep(fffffd806c80ae48,fffffd806c80af30,4,ffffffff832017c0,0) at msleep+0x125 sys/kern/kern_synch.c:249
vm_map_lock_ln(fffffd806c80ae18,ffffffff8303c0ac,6f3) at vm_map_lock_ln+0xd4 sys/uvm/uvm_map.c:5250
uvmfault_lookup(ffff80002cfb9b50,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710
uvm_fault(fffffd806c80ae18,20830000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600
end trace frame: 0xffff80002cfb9c90, count: 0
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc
db_search_symbol(ffffffff827c7250,0,ffff80002cfb96a0) at db_search_symbol+0x52 sys/ddb/db_sym.c:106
db_stack_trace_print(ffff80002cfb9770,1,100,ffffffff830310f8,ffffffff827c7870) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147
db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243
panic(ffffffff830777cb) at panic+0x1d0 sys/kern/subr_prf.c:229
mtx_leave(fffffd806c80af30) at mtx_leave+0x17c sys/kern/kern_lock.c:335
msleep(fffffd806c80ae48,fffffd806c80af30,4,ffffffff832017c0,0) at msleep+0x125 sys/kern/kern_synch.c:249
vm_map_lock_ln(fffffd806c80ae18,ffffffff8303c0ac,6f3) at vm_map_lock_ln+0xd4 sys/uvm/uvm_map.c:5250
uvmfault_lookup(ffff80002cfb9b50,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
uvm_fault_check(ffff80002cfb9b50,ffff80002cfb9b88,ffff80002cfb9bb0) at uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710
uvm_fault(fffffd806c80ae18,20830000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600
kpageflttrap(ffff80002cfb9cf0,20830000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002cfb9cf0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x57
syscall(ffff80002cfba140) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002cfba140) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2cd3fa9f680, count: -20
---
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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:
#syz set subsystems: new-subsystem
(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
Dec 10, 2024, 6:28:12 AM12/10/24
to syzkaller-o...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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