uvm_fault: ffs_alloccg (2)
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syzbot
Sep 13, 2025, 6:15:31 AMSep 13
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 597bb1fc1f2a In pfkey_reply() ensure that any error messag..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=154feb62580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=e23b0003def272c61ad9
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a44f34029cc4/disk-597bb1fc.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/5cb21f84a680/bsd-597bb1fc.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db7f40ad67c6/kernel-597bb1fc.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e23b00...@syzkaller.appspotmail.com
uvm_fault(0xffffffff838fce98, 0xffff800029602004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at ffs_alloccg+0x16e: movl 0x4(%r14),%r15d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
455990 37233 0 0 0 1 syz-executor
*314788 39370 0 0x2 0x1 0K syz-executor
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e sys/ufs/ffs/ffs_alloc.c:948
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:-1 [inline]
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 sys/ufs/ffs/ffs_alloc.c:140
ffs2_balloc(fffffd80785bb2a8,ec000,6ff,fffffd80097fb750,1,ffff80002a2e4a48) at ffs2_balloc+0x10cc sys/ufs/ffs/ffs_balloc.c:673
ffs_write(ffff80002a2e4ad0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd805fa16c10,ffff80002a2e4b80,3,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffffd760,fffffd805fa16c10,fffffd80097fb750,ffff80002a2e4c58,ffff80002a2e4c30) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
dofilereadv(ffff8000ffffd760,3,ffff80002a2e4dd8,0,ffff80002a2e4e90) at dofilereadv+0x474 sys/kern/sys_generic.c:268
sys_read(ffff8000ffffd760,ffff80002a2e4f40,ffff80002a2e4e90) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a2e4f40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2e4f40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ffd82986120, count: 4
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
*cpu0: uvm_fault(0xffffffff838fce98, 0xffff800029602004, 0, 1) -> d
ddb{0}> trace
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e sys/ufs/ffs/ffs_alloc.c:948
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:-1 [inline]
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 sys/ufs/ffs/ffs_alloc.c:140
ffs2_balloc(fffffd80785bb2a8,ec000,6ff,fffffd80097fb750,1,ffff80002a2e4a48) at ffs2_balloc+0x10cc sys/ufs/ffs/ffs_balloc.c:673
ffs_write(ffff80002a2e4ad0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd805fa16c10,ffff80002a2e4b80,3,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffffd760,fffffd805fa16c10,fffffd80097fb750,ffff80002a2e4c58,ffff80002a2e4c30) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
dofilereadv(ffff8000ffffd760,3,ffff80002a2e4dd8,0,ffff80002a2e4e90) at dofilereadv+0x474 sys/kern/sys_generic.c:268
sys_read(ffff8000ffffd760,ffff80002a2e4f40,ffff80002a2e4e90) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a2e4f40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2e4f40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ffd82986120, count: -11
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002a2e47b0
rbx 0xfffffd80785bb2a8
rdx 0
rcx 0xffff8000ffffd760
rax 0xffffffff83799ff0 cpu_info_full_primary+0x1ff0
r8 0xffffffffffffffff
r9 0xffff80002a2e4948
r10 0xe846c334477e46dd
r11 0xc2311e1a6f06ec21
r12 0x4000 __ALIGN_SIZE+0x3000
r13 0xfffffd806b6cb128
r14 0xffff800029602000
r15 0
rip 0xffffffff8132fb9e ffs_alloccg+0x16e
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a2e4700
ss 0x10
ffs_alloccg+0x16e: movl 0x4(%r14),%r15d
ddb{0}> show proc
PROC (syz-executor) tid=314788 pid=39370 tcnt=1 stat=onproc
flags process=2<EXEC> proc=1<INKTR>
runpri=50, usrpri=50, slppri=24, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffffd4c8,0xffff8000ffffcfa8
process=0xffff8000ffff2690 user=0xffff80002a2df000, vmspace=0xfffffd806e3b4d68
estcpu=0, cpticks=88, pctcpu=0.26, user=6, sys=78, intr=4
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
37233 455990 17102 0 7 0 syz-executor
37233 191751 17102 0 3 0x4000080 fsleep syz-executor
97511 112274 52878 0 3 0x80 nanoslp syz-executor
97511 387192 52878 0 3 0x4000080 sbwait syz-executor
97511 400724 52878 0 3 0x4000080 fsleep syz-executor
97511 389310 52878 0 3 0x4000080 fsleep syz-executor
18626 190913 94382 0 3 0x80 fsleep syz-executor
18626 78294 94382 0 3 0x4000080 sbwait syz-executor
18030 200544 50262 0 3 0x80 fsleep syz-executor
18030 499657 50262 0 3 0x4000080 fifow syz-executor
50187 137938 70316 0 3 0x90 fsleep syz-executor
50187 129673 70316 0 3 0x4000090 kqsel syz-executor
45447 173091 52049 0 3 0x80 fsleep syz-executor
45447 385746 52049 0 3 0x4000080 kqpoll syz-executor
43208 514008 42115 0 3 0x80 fsleep syz-executor
43208 507316 42115 0 3 0x4000080 pipewr syz-executor
54199 436187 47561 0 3 0x80 fsleep syz-executor
54199 112497 47561 0 3 0x4000080 fsleep syz-executor
54199 93991 47561 0 3 0x4000080 sbwait syz-executor
54199 191431 47561 0 3 0x4000080 sbwait syz-executor
99646 144767 0 0 3 0x14200 acct acct
52334 44648 1 0 3 0x80 nanoslp init
90569 251899 0 0 3 0x14200 bored sosplice
42115 255596 39370 0 2 0xc82 syz-executor
70316 467958 39370 0 2 0xc82 syz-executor
50262 244697 39370 0 3 0x82 nanoslp syz-executor
52049 436482 39370 0 2 0xc82 syz-executor
17102 205681 39370 0 2 0xc82 syz-executor
94382 9559 39370 0 3 0x82 nanoslp syz-executor
52878 428131 39370 0 2 0xc82 syz-executor
47561 295824 39370 0 2 0xc82 syz-executor
*39370 314788 93898 0 7 0x3 syz-executor
93898 37785 44823 0 3 0x10008a sigsusp ksh
44823 44805 99407 0 3 0x98 kqread sshd-session
99407 11568 90310 0 3 0x92 kqread sshd-session
90310 13607 1 0 3 0x88 kqread sshd
8693 397902 91232 74 3 0x1100092 bpf pflogd
91232 137998 1 0 3 0x80 sbwait pflogd
50453 344484 5356 73 3 0x1100090 kqread syslogd
5356 165935 1 0 3 0x100082 sbwait syslogd
25948 198133 1 0 3 0x100080 kqread resolvd
84059 10087 32144 77 3 0x100092 kqread dhcpleased
98907 475204 32144 77 3 0x100092 kqread dhcpleased
32144 158607 1 0 3 0x80 kqread dhcpleased
94215 217107 0 0 3 0x14200 bored smr
38959 401876 0 0 3 0x14200 pgzero zerothread
99450 109208 0 0 3 0x14200 aiodoned aiodoned
97175 13304 0 0 3 0x14200 syncer update
42335 5795 0 0 3 0x14200 cleaner cleaner
91784 513391 0 0 3 0x14200 reaper reaper
61304 440360 0 0 3 0x14200 pgdaemon pagedaemon
82145 203451 0 0 3 0x14200 bored viomb
3649 337116 0 0 3 0x40014200 acpi0 acpi0
31314 1173 0 0 3 0x40014200 idle1
98918 391081 0 0 3 0x14200 bored softnet1
95327 55648 0 0 3 0x14200 bored softnet0
27160 83452 0 0 3 0x14200 bored systqmp
45968 243770 0 0 3 0x14200 bored systq
84 384030 0 0 3 0x14200 tmoslp softclockmp
47975 396586 0 0 3 0x40014200 tmoslp softclock
322 3769 0 0 3 0x40014200 idle0
1 424991 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 37233 (syz-executor) thread 0xffff80003c41bcb0 (455990)
exclusive rwlock uobjlk r = 0 (0xfffffd806b9e9c10)
#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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:655
#3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#4 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd8066bd6ab8)
#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:1902
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
#7 recall_trap+0x8
Process 18626 (syz-executor) thread 0xffff8000fffe82b8 (78294)
exclusive rwlock sbufrcv r = 0 (0xffff8000014986e8)
#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 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 soreceive+0x27d sys/kern/uipc_socket.c:870
#4 recvit+0x40b sys/kern/uipc_syscalls.c:1078
#5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
#7 Xsyscall+0x128
Process 39370 (syz-executor) thread 0xffff8000ffffd760 (314788)
exclusive rrwlock inode r = 0 (0xfffffd80785bb348)
#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+0xa3 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vget+0x2a2 sys/kern/vfs_subr.c:693
#6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:688
#7 ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
#7 ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
#8 dofilereadv+0x474 sys/kern/sys_generic.c:268
#9 sys_read+0xa2 sys/kern/sys_generic.c:172
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
#11 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838f9630)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 ktrgenio+0x228 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
#1 ktrgenio+0x228 sys/kern/kern_ktrace.c:264
#2 dofilereadv+0x474 sys/kern/sys_generic.c:268
#3 sys_read+0xa2 sys/kern/sys_generic.c:172
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
#5 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10205 11093K 11498K 166960K 12620 0
pcb 18 14K 15K 166960K 231 0
rtable 214 8K 9K 166960K 388 0
pf 34 17K 18K 166960K 114 0
ifaddr 40 7K 8K 166960K 81 0
ifgroup 51 2K 2K 166960K 138 0
sysctl 3 1K 9K 166960K 12 0
counters 66 36K 37K 166960K 154 0
ioctlops 0 0K 4K 166960K 1585 0
iov 1 4K 24K 166960K 62 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1366 86K 86K 166960K 2197 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 34 0
dirhash 12 2K 2K 166960K 36 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 1012 0
sigio 0 0K 0K 166960K 16 0
proc 63 99K 180K 166960K 624 0
subproc 72 4K 4K 166960K 73 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 234 0
in_multi 88 6K 7K 166960K 135 0
ether_multi 1 0K 0K 166960K 5 0
mrt 0 0K 0K 166960K 2 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 492 0
fusefs mount 1 32K 32K 166960K 1 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 242 164K 187K 166960K 10899 0
UVM aobj 20 2K 2K 166960K 22 0
pinsyscall 42 84K 103K 166960K 2139 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 73 0
NDP 11 0K 2K 166960K 56 0
temp 72 8654K 8895K 166960K 54297 0
kqueue 13 20K 30K 166960K 158 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 26 0 0 1 0 1 1 0 8 0
rtpcb 120 100 0 96 1 0 1 1 0 8 0
rtentry 176 130 0 39 5 0 5 5 0 8 0
unpcb 144 661 0 633 8 6 2 4 0 8 0
syncache 336 9 0 9 4 4 0 1 0 8 0
tcpqe 32 2 0 2 2 2 0 1 0 8 0
tcpcb 736 450 0 442 16 12 4 7 0 8 3
arp 136 21 0 9 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 3 0 3 1 1 0 1 0 8 0
inpcb 328 1317 0 1304 26 16 10 10 0 8 8
nd6 144 20 0 3 1 0 1 1 0 8 0
pkpcb 40 11 0 11 5 5 0 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 33 0 33 3 2 1 1 0 8 1
pppxif 1504 3 0 3 2 1 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 7 0 2 1 0 1 1 0 482 0
pffrnode 88 7 0 2 1 0 1 1 0 8 0
pffrent 40 15 0 10 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 57 0 25 1 0 1 1 0 8 0
pfstkey 128 57 0 23 2 0 2 2 0 8 0
pfstate 384 55 0 24 5 0 5 5 0 8 0
pfrule 1344 22 0 17 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 500 0 82 30 0 30 30 0 8 2
art_table 40 501 0 82 5 0 5 5 0 8 0
art_node 32 128 0 49 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 28 0 18 1 0 1 1 0 8 0
shmpl 112 19 0 2 1 0 1 1 0 8 0
dirhash 1024 33 0 16 3 0 3 3 0 8 0
dino2pl 256 3363 0 1859 96 0 96 96 0 8 0
ffsino 296 3363 0 1859 118 1 117 118 0 8 0
nchpl 144 4726 0 3033 63 0 63 63 0 8 0
rtmask 32 6 0 6 3 3 0 1 0 8 0
uvmvnodes 80 3859 0 0 79 0 79 79 0 8 0
vnodes 216 3859 0 0 215 0 215 215 0 8 0
namei 1024 17266 0 17266 5 4 1 2 0 8 1
percpumem 16 92 0 44 1 0 1 1 0 8 0
kstatmem 264 82 0 58 4 2 2 3 0 8 0
scsiplug 72 7 0 7 3 2 1 1 0 8 1
scxspl 216 19659 0 19659 11 10 1 8 1 8 1
plimitpl 152 232 0 216 1 0 1 1 0 8 0
sigapl 424 1331 0 1281 7 1 6 7 0 8 0
knotepl 120 579 0 0 18 0 18 18 0 8 0
kqueuepl 224 287 0 275 3 1 2 2 0 8 1
pipepl 344 226 0 197 6 3 3 6 0 8 0
fdescpl 528 1304 0 1272 3 0 3 3 0 8 0
filepl 160 9129 0 8892 31 15 16 16 0 8 5
lockfpl 104 619 0 616 2 1 1 2 0 8 0
lockfspl 48 193 0 190 1 0 1 1 0 8 0
sessionpl 144 30 0 22 1 0 1 1 0 8 0
pgrppl 48 47 0 31 1 0 1 1 0 8 0
ucredpl 104 1924 0 1910 1 0 1 1 0 8 0
zombiepl 144 1415 0 1415 1 0 1 1 0 8 1
processpl 1232 1331 0 1281 6 1 5 5 0 8 0
procpl 664 2781 0 2719 6 0 6 6 0 8 0
sosppl 168 8 0 8 2 2 0 1 0 8 0
sockpl 752 2111 0 2066 36 23 13 14 0 8 8
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 113 0 0 14 0 14 14 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 55 0 0 7 0 7 7 0 8 1
mtagpl 96 8 0 0 1 0 1 1 0 8 0
mbufpl 256 1220 0 0 77 0 77 77 0 8 0
bufpl 280 8117 0 1974 439 0 439 439 0 8 0
anonpl 32 7767 0 0 63 0 63 63 0 246 0
amapchunkpl 152 37285 0 36783 53 26 27 30 0 158 7
amappl16 200 4282 0 4244 38 24 14 16 0 8 8
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 129 0 118 1 0 1 1 0 8 0
amappl13 176 7 0 7 1 1 0 1 0 8 0
amappl12 168 1963 0 1932 3 1 2 2 0 8 0
amappl11 160 49 0 35 1 0 1 1 0 8 0
amappl10 152 6 0 6 1 1 0 1 0 8 0
amappl9 144 248 0 247 2 1 1 1 0 8 0
amappl8 136 23 0 20 1 0 1 1 0 8 0
amappl7 128 114 0 103 1 0 1 1 0 8 0
amappl6 120 186 0 182 1 0 1 1 0 8 0
amappl5 112 133 0 122 1 0 1 1 0 8 0
amappl4 104 329 0 309 1 0 1 1 0 8 0
amappl3 96 6285 0 6187 4 1 3 3 0 8 0
amappl2 88 1580 0 1500 2 0 2 2 0 8 0
amappl1 80 13242 0 12666 15 1 14 15 0 8 0
amappl 88 10016 0 9846 5 0 5 5 0 92 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 21 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1304 0 1272 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1304 0 1272 1 0 1 1 0 8 0
vmmpekpl 168 11961 0 11923 2 0 2 2 0 8 0
vmmpepl 168 87857 0 85843 122 24 98 100 0 357 5
vmsppl 488 1303 0 1272 7 3 4 5 0 8 0
rwobjpl 80 28891 0 24109 103 3 100 100 0 8 2
pdppl 4096 2616 0 2544 113 41 72 86 0 8 0
pvpl 32 15169 0 0 124 1 123 123 0 265 0
pmappl 256 1303 0 1272 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 376 0 63 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e sys/ufs/ffs/ffs_alloc.c:948
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:-1 [inline]
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 sys/ufs/ffs/ffs_alloc.c:140
ffs2_balloc(fffffd80785bb2a8,ec000,6ff,fffffd80097fb750,1,ffff80002a2e4a48) at ffs2_balloc+0x10cc sys/ufs/ffs/ffs_balloc.c:673
ffs_write(ffff80002a2e4ad0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd805fa16c10,ffff80002a2e4b80,3,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffffd760,fffffd805fa16c10,fffffd80097fb750,ffff80002a2e4c58,ffff80002a2e4c30) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
dofilereadv(ffff8000ffffd760,3,ffff80002a2e4dd8,0,ffff80002a2e4e90) at dofilereadv+0x474 sys/kern/sys_generic.c:268
sys_read(ffff8000ffffd760,ffff80002a2e4f40,ffff80002a2e4e90) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a2e4f40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2e4f40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ffd82986120, count: -11
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299edff0) 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(ffffffff838f9428) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838f9428) at __mp_lock+0x199 sys/kern/kern_lock.c:165
uvm_fault(fffffd8066bd69b8,2f31eb9c000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656
upageflttrap(ffff80003a3f9fa0,2f31eb9c000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003a3f9fa0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7244db57acb0, count: 7
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) 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(ffffffff838f9428) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838f9428) at __mp_lock+0x199 sys/kern/kern_lock.c:165
uvm_fault(fffffd8066bd69b8,2f31eb9c000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656
upageflttrap(ffff80003a3f9fa0,2f31eb9c000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003a3f9fa0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7244db57acb0, count: -8
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
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If you want to overwrite report's subsystems, reply with:
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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: 597bb1fc1f2a In pfkey_reply() ensure that any error messag..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=154feb62580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=e23b0003def272c61ad9
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a44f34029cc4/disk-597bb1fc.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/5cb21f84a680/bsd-597bb1fc.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db7f40ad67c6/kernel-597bb1fc.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e23b00...@syzkaller.appspotmail.com
uvm_fault(0xffffffff838fce98, 0xffff800029602004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at ffs_alloccg+0x16e: movl 0x4(%r14),%r15d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
455990 37233 0 0 0 1 syz-executor
*314788 39370 0 0x2 0x1 0K syz-executor
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e sys/ufs/ffs/ffs_alloc.c:948
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:-1 [inline]
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 sys/ufs/ffs/ffs_alloc.c:140
ffs2_balloc(fffffd80785bb2a8,ec000,6ff,fffffd80097fb750,1,ffff80002a2e4a48) at ffs2_balloc+0x10cc sys/ufs/ffs/ffs_balloc.c:673
ffs_write(ffff80002a2e4ad0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd805fa16c10,ffff80002a2e4b80,3,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffffd760,fffffd805fa16c10,fffffd80097fb750,ffff80002a2e4c58,ffff80002a2e4c30) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
dofilereadv(ffff8000ffffd760,3,ffff80002a2e4dd8,0,ffff80002a2e4e90) at dofilereadv+0x474 sys/kern/sys_generic.c:268
sys_read(ffff8000ffffd760,ffff80002a2e4f40,ffff80002a2e4e90) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a2e4f40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2e4f40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ffd82986120, count: 4
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
*cpu0: uvm_fault(0xffffffff838fce98, 0xffff800029602004, 0, 1) -> d
ddb{0}> trace
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e sys/ufs/ffs/ffs_alloc.c:948
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:-1 [inline]
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 sys/ufs/ffs/ffs_alloc.c:140
ffs2_balloc(fffffd80785bb2a8,ec000,6ff,fffffd80097fb750,1,ffff80002a2e4a48) at ffs2_balloc+0x10cc sys/ufs/ffs/ffs_balloc.c:673
ffs_write(ffff80002a2e4ad0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd805fa16c10,ffff80002a2e4b80,3,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffffd760,fffffd805fa16c10,fffffd80097fb750,ffff80002a2e4c58,ffff80002a2e4c30) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
dofilereadv(ffff8000ffffd760,3,ffff80002a2e4dd8,0,ffff80002a2e4e90) at dofilereadv+0x474 sys/kern/sys_generic.c:268
sys_read(ffff8000ffffd760,ffff80002a2e4f40,ffff80002a2e4e90) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a2e4f40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2e4f40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ffd82986120, count: -11
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002a2e47b0
rbx 0xfffffd80785bb2a8
rdx 0
rcx 0xffff8000ffffd760
rax 0xffffffff83799ff0 cpu_info_full_primary+0x1ff0
r8 0xffffffffffffffff
r9 0xffff80002a2e4948
r10 0xe846c334477e46dd
r11 0xc2311e1a6f06ec21
r12 0x4000 __ALIGN_SIZE+0x3000
r13 0xfffffd806b6cb128
r14 0xffff800029602000
r15 0
rip 0xffffffff8132fb9e ffs_alloccg+0x16e
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a2e4700
ss 0x10
ffs_alloccg+0x16e: movl 0x4(%r14),%r15d
ddb{0}> show proc
PROC (syz-executor) tid=314788 pid=39370 tcnt=1 stat=onproc
flags process=2<EXEC> proc=1<INKTR>
runpri=50, usrpri=50, slppri=24, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffffd4c8,0xffff8000ffffcfa8
process=0xffff8000ffff2690 user=0xffff80002a2df000, vmspace=0xfffffd806e3b4d68
estcpu=0, cpticks=88, pctcpu=0.26, user=6, sys=78, intr=4
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
37233 455990 17102 0 7 0 syz-executor
37233 191751 17102 0 3 0x4000080 fsleep syz-executor
97511 112274 52878 0 3 0x80 nanoslp syz-executor
97511 387192 52878 0 3 0x4000080 sbwait syz-executor
97511 400724 52878 0 3 0x4000080 fsleep syz-executor
97511 389310 52878 0 3 0x4000080 fsleep syz-executor
18626 190913 94382 0 3 0x80 fsleep syz-executor
18626 78294 94382 0 3 0x4000080 sbwait syz-executor
18030 200544 50262 0 3 0x80 fsleep syz-executor
18030 499657 50262 0 3 0x4000080 fifow syz-executor
50187 137938 70316 0 3 0x90 fsleep syz-executor
50187 129673 70316 0 3 0x4000090 kqsel syz-executor
45447 173091 52049 0 3 0x80 fsleep syz-executor
45447 385746 52049 0 3 0x4000080 kqpoll syz-executor
43208 514008 42115 0 3 0x80 fsleep syz-executor
43208 507316 42115 0 3 0x4000080 pipewr syz-executor
54199 436187 47561 0 3 0x80 fsleep syz-executor
54199 112497 47561 0 3 0x4000080 fsleep syz-executor
54199 93991 47561 0 3 0x4000080 sbwait syz-executor
54199 191431 47561 0 3 0x4000080 sbwait syz-executor
99646 144767 0 0 3 0x14200 acct acct
52334 44648 1 0 3 0x80 nanoslp init
90569 251899 0 0 3 0x14200 bored sosplice
42115 255596 39370 0 2 0xc82 syz-executor
70316 467958 39370 0 2 0xc82 syz-executor
50262 244697 39370 0 3 0x82 nanoslp syz-executor
52049 436482 39370 0 2 0xc82 syz-executor
17102 205681 39370 0 2 0xc82 syz-executor
94382 9559 39370 0 3 0x82 nanoslp syz-executor
52878 428131 39370 0 2 0xc82 syz-executor
47561 295824 39370 0 2 0xc82 syz-executor
*39370 314788 93898 0 7 0x3 syz-executor
93898 37785 44823 0 3 0x10008a sigsusp ksh
44823 44805 99407 0 3 0x98 kqread sshd-session
99407 11568 90310 0 3 0x92 kqread sshd-session
90310 13607 1 0 3 0x88 kqread sshd
8693 397902 91232 74 3 0x1100092 bpf pflogd
91232 137998 1 0 3 0x80 sbwait pflogd
50453 344484 5356 73 3 0x1100090 kqread syslogd
5356 165935 1 0 3 0x100082 sbwait syslogd
25948 198133 1 0 3 0x100080 kqread resolvd
84059 10087 32144 77 3 0x100092 kqread dhcpleased
98907 475204 32144 77 3 0x100092 kqread dhcpleased
32144 158607 1 0 3 0x80 kqread dhcpleased
94215 217107 0 0 3 0x14200 bored smr
38959 401876 0 0 3 0x14200 pgzero zerothread
99450 109208 0 0 3 0x14200 aiodoned aiodoned
97175 13304 0 0 3 0x14200 syncer update
42335 5795 0 0 3 0x14200 cleaner cleaner
91784 513391 0 0 3 0x14200 reaper reaper
61304 440360 0 0 3 0x14200 pgdaemon pagedaemon
82145 203451 0 0 3 0x14200 bored viomb
3649 337116 0 0 3 0x40014200 acpi0 acpi0
31314 1173 0 0 3 0x40014200 idle1
98918 391081 0 0 3 0x14200 bored softnet1
95327 55648 0 0 3 0x14200 bored softnet0
27160 83452 0 0 3 0x14200 bored systqmp
45968 243770 0 0 3 0x14200 bored systq
84 384030 0 0 3 0x14200 tmoslp softclockmp
47975 396586 0 0 3 0x40014200 tmoslp softclock
322 3769 0 0 3 0x40014200 idle0
1 424991 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 37233 (syz-executor) thread 0xffff80003c41bcb0 (455990)
exclusive rwlock uobjlk r = 0 (0xfffffd806b9e9c10)
#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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:655
#3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#4 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd8066bd6ab8)
#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:1902
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
#7 recall_trap+0x8
Process 18626 (syz-executor) thread 0xffff8000fffe82b8 (78294)
exclusive rwlock sbufrcv r = 0 (0xffff8000014986e8)
#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 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 soreceive+0x27d sys/kern/uipc_socket.c:870
#4 recvit+0x40b sys/kern/uipc_syscalls.c:1078
#5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
#7 Xsyscall+0x128
Process 39370 (syz-executor) thread 0xffff8000ffffd760 (314788)
exclusive rrwlock inode r = 0 (0xfffffd80785bb348)
#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+0xa3 sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vget+0x2a2 sys/kern/vfs_subr.c:693
#6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:688
#7 ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
#7 ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
#8 dofilereadv+0x474 sys/kern/sys_generic.c:268
#9 sys_read+0xa2 sys/kern/sys_generic.c:172
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
#11 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838f9630)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 ktrgenio+0x228 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
#1 ktrgenio+0x228 sys/kern/kern_ktrace.c:264
#2 dofilereadv+0x474 sys/kern/sys_generic.c:268
#3 sys_read+0xa2 sys/kern/sys_generic.c:172
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
#5 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10205 11093K 11498K 166960K 12620 0
pcb 18 14K 15K 166960K 231 0
rtable 214 8K 9K 166960K 388 0
pf 34 17K 18K 166960K 114 0
ifaddr 40 7K 8K 166960K 81 0
ifgroup 51 2K 2K 166960K 138 0
sysctl 3 1K 9K 166960K 12 0
counters 66 36K 37K 166960K 154 0
ioctlops 0 0K 4K 166960K 1585 0
iov 1 4K 24K 166960K 62 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1366 86K 86K 166960K 2197 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 34 0
dirhash 12 2K 2K 166960K 36 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 1012 0
sigio 0 0K 0K 166960K 16 0
proc 63 99K 180K 166960K 624 0
subproc 72 4K 4K 166960K 73 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 234 0
in_multi 88 6K 7K 166960K 135 0
ether_multi 1 0K 0K 166960K 5 0
mrt 0 0K 0K 166960K 2 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 492 0
fusefs mount 1 32K 32K 166960K 1 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 242 164K 187K 166960K 10899 0
UVM aobj 20 2K 2K 166960K 22 0
pinsyscall 42 84K 103K 166960K 2139 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 73 0
NDP 11 0K 2K 166960K 56 0
temp 72 8654K 8895K 166960K 54297 0
kqueue 13 20K 30K 166960K 158 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 26 0 0 1 0 1 1 0 8 0
rtpcb 120 100 0 96 1 0 1 1 0 8 0
rtentry 176 130 0 39 5 0 5 5 0 8 0
unpcb 144 661 0 633 8 6 2 4 0 8 0
syncache 336 9 0 9 4 4 0 1 0 8 0
tcpqe 32 2 0 2 2 2 0 1 0 8 0
tcpcb 736 450 0 442 16 12 4 7 0 8 3
arp 136 21 0 9 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 3 0 3 1 1 0 1 0 8 0
inpcb 328 1317 0 1304 26 16 10 10 0 8 8
nd6 144 20 0 3 1 0 1 1 0 8 0
pkpcb 40 11 0 11 5 5 0 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 33 0 33 3 2 1 1 0 8 1
pppxif 1504 3 0 3 2 1 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 7 0 2 1 0 1 1 0 482 0
pffrnode 88 7 0 2 1 0 1 1 0 8 0
pffrent 40 15 0 10 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 57 0 25 1 0 1 1 0 8 0
pfstkey 128 57 0 23 2 0 2 2 0 8 0
pfstate 384 55 0 24 5 0 5 5 0 8 0
pfrule 1344 22 0 17 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 500 0 82 30 0 30 30 0 8 2
art_table 40 501 0 82 5 0 5 5 0 8 0
art_node 32 128 0 49 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 28 0 18 1 0 1 1 0 8 0
shmpl 112 19 0 2 1 0 1 1 0 8 0
dirhash 1024 33 0 16 3 0 3 3 0 8 0
dino2pl 256 3363 0 1859 96 0 96 96 0 8 0
ffsino 296 3363 0 1859 118 1 117 118 0 8 0
nchpl 144 4726 0 3033 63 0 63 63 0 8 0
rtmask 32 6 0 6 3 3 0 1 0 8 0
uvmvnodes 80 3859 0 0 79 0 79 79 0 8 0
vnodes 216 3859 0 0 215 0 215 215 0 8 0
namei 1024 17266 0 17266 5 4 1 2 0 8 1
percpumem 16 92 0 44 1 0 1 1 0 8 0
kstatmem 264 82 0 58 4 2 2 3 0 8 0
scsiplug 72 7 0 7 3 2 1 1 0 8 1
scxspl 216 19659 0 19659 11 10 1 8 1 8 1
plimitpl 152 232 0 216 1 0 1 1 0 8 0
sigapl 424 1331 0 1281 7 1 6 7 0 8 0
knotepl 120 579 0 0 18 0 18 18 0 8 0
kqueuepl 224 287 0 275 3 1 2 2 0 8 1
pipepl 344 226 0 197 6 3 3 6 0 8 0
fdescpl 528 1304 0 1272 3 0 3 3 0 8 0
filepl 160 9129 0 8892 31 15 16 16 0 8 5
lockfpl 104 619 0 616 2 1 1 2 0 8 0
lockfspl 48 193 0 190 1 0 1 1 0 8 0
sessionpl 144 30 0 22 1 0 1 1 0 8 0
pgrppl 48 47 0 31 1 0 1 1 0 8 0
ucredpl 104 1924 0 1910 1 0 1 1 0 8 0
zombiepl 144 1415 0 1415 1 0 1 1 0 8 1
processpl 1232 1331 0 1281 6 1 5 5 0 8 0
procpl 664 2781 0 2719 6 0 6 6 0 8 0
sosppl 168 8 0 8 2 2 0 1 0 8 0
sockpl 752 2111 0 2066 36 23 13 14 0 8 8
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 113 0 0 14 0 14 14 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 55 0 0 7 0 7 7 0 8 1
mtagpl 96 8 0 0 1 0 1 1 0 8 0
mbufpl 256 1220 0 0 77 0 77 77 0 8 0
bufpl 280 8117 0 1974 439 0 439 439 0 8 0
anonpl 32 7767 0 0 63 0 63 63 0 246 0
amapchunkpl 152 37285 0 36783 53 26 27 30 0 158 7
amappl16 200 4282 0 4244 38 24 14 16 0 8 8
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 129 0 118 1 0 1 1 0 8 0
amappl13 176 7 0 7 1 1 0 1 0 8 0
amappl12 168 1963 0 1932 3 1 2 2 0 8 0
amappl11 160 49 0 35 1 0 1 1 0 8 0
amappl10 152 6 0 6 1 1 0 1 0 8 0
amappl9 144 248 0 247 2 1 1 1 0 8 0
amappl8 136 23 0 20 1 0 1 1 0 8 0
amappl7 128 114 0 103 1 0 1 1 0 8 0
amappl6 120 186 0 182 1 0 1 1 0 8 0
amappl5 112 133 0 122 1 0 1 1 0 8 0
amappl4 104 329 0 309 1 0 1 1 0 8 0
amappl3 96 6285 0 6187 4 1 3 3 0 8 0
amappl2 88 1580 0 1500 2 0 2 2 0 8 0
amappl1 80 13242 0 12666 15 1 14 15 0 8 0
amappl 88 10016 0 9846 5 0 5 5 0 92 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 21 0 2 1 0 1 1 0 8 0
uaddrrnd 24 1304 0 1272 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1304 0 1272 1 0 1 1 0 8 0
vmmpekpl 168 11961 0 11923 2 0 2 2 0 8 0
vmmpepl 168 87857 0 85843 122 24 98 100 0 357 5
vmsppl 488 1303 0 1272 7 3 4 5 0 8 0
rwobjpl 80 28891 0 24109 103 3 100 100 0 8 2
pdppl 4096 2616 0 2544 113 41 72 86 0 8 0
pvpl 32 15169 0 0 124 1 123 123 0 265 0
pmappl 256 1303 0 1272 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 376 0 63 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline]
ffs_alloccg(fffffd80785bb2a8,4,7ab28,4000) at ffs_alloccg+0x16e sys/ufs/ffs/ffs_alloc.c:948
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 ffs_hashalloc sys/ufs/ffs/ffs_alloc.c:-1 [inline]
ffs_alloc(fffffd80785bb2a8,3b,7ab28,4000,fffffd80097fb750,ffff80002a2e4948) at ffs_alloc+0x314 sys/ufs/ffs/ffs_alloc.c:140
ffs2_balloc(fffffd80785bb2a8,ec000,6ff,fffffd80097fb750,1,ffff80002a2e4a48) at ffs2_balloc+0x10cc sys/ufs/ffs/ffs_balloc.c:673
ffs_write(ffff80002a2e4ad0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd805fa16c10,ffff80002a2e4b80,3,fffffd80097fb750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000ffffd760,fffffd805fa16c10,fffffd80097fb750,ffff80002a2e4c58,ffff80002a2e4c30) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 ktrwrite2 sys/kern/kern_ktrace.c:653 [inline]
ktrgenio(ffff8000ffffd760,3,0,ffff800000b38800,cac) at ktrgenio+0x2b3 sys/kern/kern_ktrace.c:264
dofilereadv(ffff8000ffffd760,3,ffff80002a2e4dd8,0,ffff80002a2e4e90) at dofilereadv+0x474 sys/kern/sys_generic.c:268
sys_read(ffff8000ffffd760,ffff80002a2e4f40,ffff80002a2e4e90) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a2e4f40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2e4f40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6ffd82986120, count: -11
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299edff0) 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(ffffffff838f9428) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838f9428) at __mp_lock+0x199 sys/kern/kern_lock.c:165
uvm_fault(fffffd8066bd69b8,2f31eb9c000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656
upageflttrap(ffff80003a3f9fa0,2f31eb9c000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003a3f9fa0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7244db57acb0, count: 7
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) 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(ffffffff838f9428) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838f9428) at __mp_lock+0x199 sys/kern/kern_lock.c:165
uvm_fault(fffffd8066bd69b8,2f31eb9c000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656
upageflttrap(ffff80003a3f9fa0,2f31eb9c000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003a3f9fa0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7244db57acb0, count: -8
---
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syzbot
Dec 12, 2025, 7:14:22 AM (5 days ago) Dec 12
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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