uvm_fault: kcov_remote_enter
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syzbot
Nov 29, 2022, 7:08:37 PM11/29/22
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 77e4b1bd8000 Only include stdarg.h, if we call any of va_{..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16dc3bbb880000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=4273e3d879dea05c8b15
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b1729ebc774e/disk-77e4b1bd.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/08857ddb4968/bsd-77e4b1bd.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4255a44a191f/kernel-77e4b1bd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4273e3...@syzkaller.appspotmail.com
uvm_fault(0xffffffff829bde68, 0xffff800021273000, 0, 2) -> e
kernel: page fault trap, code=0
Stopped at kcov_remote_enter+0x112: movq $0,0(%rcx)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*409120 66134 0 0 0 0 syz-executor.4
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: 9
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
*cpu0: uvm_fault(0xffffffff829bde68, 0xffff800021273000, 0, 2) -> e
ddb> trace
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: -6
ddb> show registers
rdi 0x4
rsi 0xffff800000685d00
rbp 0xffff800021784f50
rbx 0
rdx 0xffff80002176ca90
rcx 0xffff800021273000
rax 0xfffffd807035eea0
r8 0
r9 0
r10 0x8a1cabea21770517
r11 0x5ad3c4af4ac15324
r12 0xffff800021703a40
r13 0xffffffff82937ff0 cpu_info_full_primary+0x1ff0
r14 0xffff8000217347f0
r15 0
rip 0xffffffff81de0642 kcov_remote_enter+0x112
cs 0x8
rflags 0x10297 __ALIGN_SIZE+0xf297
rsp 0xffff800021784f30
ss 0
kcov_remote_enter+0x112: movq $0,0(%rcx)
ddb> show proc
PROC (syz-executor.4) pid=409120 stat=onproc
flags process=0 proc=0
pri=83, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800021702540,0xffff80002176cfe0
process=0xffff800029a713b0 user=0xffff800021780000, vmspace=0xfffffd8071102008
estcpu=36, cpticks=2, pctcpu=0.0
user=1, sys=0, intr=1
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
28906 179364 71879 0 3 0x80 nanoslp syz-executor.7
28906 76619 71879 0 3 0x4000080 fsleep syz-executor.7
*66134 409120 11167 0 7 0 syz-executor.4
66134 234614 11167 0 2 0x4000000 syz-executor.4
7283 36079 30992 0 2 0 syz-executor.5
7283 67287 30992 0 3 0x4000080 fsleep syz-executor.5
80774 59262 72811 0 2 0 syz-executor.3
80774 462563 72811 0 3 0x4000080 fsleep syz-executor.3
72811 308637 10386 0 3 0x82 nanoslp syz-executor.3
17723 426795 0 0 3 0x14200 acct acct
93525 370949 10386 0 2 0x2 syz-executor.6
30992 28932 10386 0 3 0x82 nanoslp syz-executor.5
16503 477546 10386 0 3 0x82 piperd syz-executor.0
12547 27656 0 0 3 0x14200 bored sosplice
25073 472188 0 0 3 0x14280 nfsidl nfsio
61068 427882 0 0 3 0x14280 nfsidl nfsio
94819 105401 0 0 3 0x14280 nfsidl nfsio
70691 163970 0 0 3 0x14280 nfsidl nfsio
69523 325480 0 0 3 0x14280 nfsidl nfsio
56840 294040 0 0 3 0x14280 nfsidl nfsio
10123 334622 0 0 3 0x14280 nfsidl nfsio
33363 412238 0 0 3 0x14280 nfsidl nfsio
75880 281561 0 0 3 0x14280 nfsidl nfsio
98328 444411 0 0 3 0x14280 nfsidl nfsio
43044 231772 0 0 3 0x14280 nfsidl nfsio
77897 353836 0 0 3 0x14280 nfsidl nfsio
19813 410633 0 0 3 0x14280 nfsidl nfsio
17042 307074 0 0 3 0x14280 nfsidl nfsio
65454 375392 0 0 3 0x14280 nfsidl nfsio
53229 450254 0 0 3 0x14280 nfsidl nfsio
59671 335952 0 0 3 0x14280 nfsidl nfsio
90439 126308 0 0 3 0x14280 nfsidl nfsio
24382 133348 0 0 3 0x14280 nfsidl nfsio
2646 441692 0 0 3 0x14280 nfsidl nfsio
71879 67751 10386 0 3 0x82 nanoslp syz-executor.7
11167 39493 10386 0 3 0x82 nanoslp syz-executor.4
50570 32440 10386 0 2 0x2 syz-executor.2
82008 242714 10386 0 3 0x82 piperd syz-executor.1
10386 196013 71745 0 3 0x82 wait syz-fuzzer
10386 489622 71745 0 3 0x4000082 nanoslp syz-fuzzer
10386 115581 71745 0 3 0x4000082 wait syz-fuzzer
10386 340112 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 302137 71745 0 3 0x4000082 wait syz-fuzzer
10386 321090 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 45505 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 337899 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 401689 71745 0 3 0x4000082 wait syz-fuzzer
10386 201432 71745 0 3 0x4000082 wait syz-fuzzer
10386 413621 71745 0 3 0x4000082 wait syz-fuzzer
10386 327345 71745 0 3 0x4000082 wait syz-fuzzer
10386 150737 71745 0 3 0x4000082 wait syz-fuzzer
10386 370472 71745 0 3 0x4000082 kqread syz-fuzzer
71745 12932 3709 0 3 0x10008a sigsusp ksh
3709 39197 42987 0 3 0x9a kqread sshd
46969 47670 1 0 3 0x100083 ttyin getty
42987 139503 1 0 3 0x88 kqread sshd
59185 313347 28749 73 2 0x1100090 syslogd
28749 374232 1 0 3 0x100082 netio syslogd
26044 512353 1 0 3 0x100080 kqread resolvd
30936 63118 37031 77 3 0x100092 kqread dhcpleased
14514 29593 37031 77 3 0x100092 kqread dhcpleased
37031 192721 1 0 3 0x80 kqread dhcpleased
67182 229356 0 0 3 0x14200 bored smr
82176 478593 0 0 2 0x14200 zerothread
76675 181699 0 0 3 0x14200 aiodoned aiodoned
48661 190832 0 0 3 0x14200 syncer update
57838 195232 0 0 3 0x14200 cleaner cleaner
86374 202012 0 0 3 0x14200 reaper reaper
82626 53932 0 0 3 0x14200 pgdaemon pagedaemon
14727 72612 0 0 3 0x14200 bored viomb
77582 376253 0 0 3 0x40014200 acpi0 acpi0
86342 332842 0 0 3 0x14200 bored softnet
80932 70621 0 0 3 0x14200 bored softnet
20822 445750 0 0 3 0x14200 bored softnet
22125 268950 0 0 3 0x14200 bored softnet
47330 431063 0 0 3 0x14200 bored systqmp
81706 288172 0 0 3 0x14200 bored systq
20869 23451 0 0 3 0x40014200 bored softclock
99227 120214 0 0 3 0x40014200 idle0
1 173430 0 0 3 0x82 wait 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 10181 6418K 6814K 78643K 12734 0
pcb 13 15K 20K 78643K 637 0
rtable 196 14K 16K 78643K 836 0
ifaddr 67 15K 17K 78643K 190 0
counters 27 17K 17K 78643K 56 0
ioctlops 0 0K 4K 78643K 185 0
iov 0 0K 16K 78643K 148 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1404 88K 88K 78643K 3799 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 8 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 700 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 14 49K 69K 78643K 1987 0
sigio 0 0K 0K 78643K 3 0
proc 58 59K 83K 78643K 918 0
subproc 104 6K 6K 78643K 208 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 175 0
in_multi 78 5K 6K 78643K 213 0
ether_multi 1 0K 0K 78643K 4 0
mrt 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 49 228K 228K 78643K 49 0
exec 0 0K 1K 78643K 578 0
pfkey data 0 0K 0K 78643K 3 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 292 325K 326K 78643K 13668 0
UVM aobj 98 3K 3K 78643K 101 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 30 0
NDP 11 0K 1K 78643K 66 0
temp 124 4694K 5718K 78643K 22024 0
kqueue 12 18K 22K 78643K 137 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
rtpcb 120 131 0 128 2 1 1 2 0 8 0
rtentry 112 215 0 130 4 0 4 4 0 8 0
unpcb 144 3158 0 3145 15 11 4 6 0 8 3
syncache 296 13 0 13 4 3 1 1 0 8 1
tcpqe 32 110 0 110 3 2 1 1 0 8 1
tcpcb 776 1981 0 1975 45 37 8 14 0 8 7
arp 88 34 0 18 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 336 3394 0 3385 53 43 10 21 0 8 8
nd6 48 49 0 31 1 0 1 1 0 8 0
pkpcb 40 3 0 3 1 1 0 1 0 8 0
kcovpl 48 16 0 8 1 0 1 1 0 8 0
ppxss 1160 9 0 9 2 2 0 1 0 8 0
pppxif 1352 6 0 6 1 1 0 1 0 8 0
pfosfp 40 67 0 66 1 0 1 1 0 8 0
pfosfpen 112 67 0 66 1 0 1 1 0 8 0
pfanchor 1280 826 0 649 20 0 20 20 0 8 3
art_heap8 4096 3 0 2 2 1 1 2 0 8 0
art_heap4 256 931 0 569 34 11 23 30 0 8 0
art_table 32 934 0 571 4 0 4 4 0 8 0
art_node 16 214 0 140 1 0 1 1 0 8 0
sysvmsgpl 40 62 0 42 1 0 1 1 0 8 0
semupl 112 6 0 6 1 1 0 1 0 8 0
semapl 112 698 0 688 1 0 1 1 0 8 0
shmpl 112 98 0 3 4 1 3 3 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 4120 0 2682 91 0 91 91 0 8 0
ffsino 240 4120 0 2682 85 0 85 85 0 8 0
nchpl 144 8038 0 6407 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 29279 0 29279 2 1 1 2 0 8 1
vcpupl 2048 18 0 0 3 0 3 3 0 8 0
vmpool 536 18 0 0 2 0 2 2 0 8 0
kstatmem 264 68 0 46 2 0 2 2 0 8 0
scxspl 216 19088 0 19088 9 8 1 8 0 8 1
plimitpl 152 204 0 188 1 0 1 1 0 8 0
sigapl 424 2285 0 2222 8 0 8 8 0 8 0
futexpl 64 28407 0 28404 1 0 1 1 0 8 0
knotepl 120 28001 0 27921 15 10 5 8 0 8 2
kqueuepl 184 439 0 431 6 5 1 4 0 8 0
pipepl 288 364 0 336 5 2 3 5 0 8 0
fdescpl 432 2247 0 2222 4 0 4 4 0 8 0
filepl 120 19668 0 19429 27 15 12 15 0 8 4
lockfpl 104 295 0 293 2 1 1 2 0 8 0
lockfspl 48 145 0 143 1 0 1 1 0 8 0
sessionpl 144 31 0 15 1 0 1 1 0 8 0
pgrppl 48 31 0 15 1 0 1 1 0 8 0
ucredpl 104 2138 0 2127 1 0 1 1 0 8 0
zombiepl 144 2222 0 2222 1 0 1 1 0 8 1
processpl 1008 2285 0 2222 10 1 9 9 0 8 0
procpl 672 5028 0 4948 12 3 9 9 0 8 0
sosppl 168 14 0 14 4 4 0 1 0 8 0
sockpl 456 6686 0 6661 146 134 12 34 0 8 8
mcl64k 65536 49 0 49 5 4 1 1 0 8 1
mcl16k 16384 246 0 246 1 0 1 1 0 8 1
mcl12k 12288 38 0 38 5 4 1 1 0 8 1
mcl9k 9216 15 0 15 3 3 0 1 0 8 0
mcl8k 8192 83 0 83 4 3 1 1 0 8 1
mcl4k 4096 210 0 210 1 0 1 1 0 8 1
mcl2k2 2112 7 0 7 4 3 1 1 0 8 1
mcl2k 2048 76105 0 76036 36 26 10 32 0 8 0
mtagpl 96 146 0 123 4 2 2 3 0 8 0
mbufpl 256 142957 0 142684 196 163 33 69 0 8 8
bufpl 288 6554 0 281 449 0 449 449 0 8 0
anonpl 24 443120 0 426829 111 4 107 107 0 188 3
amapchunkpl 152 38287 0 37616 34 4 30 30 0 158 2
amappl16 200 5005 0 4470 34 2 32 32 0 8 3
amappl15 192 5 0 5 1 1 0 1 0 8 0
amappl14 184 175 0 163 2 1 1 2 0 8 0
amappl13 176 3 0 2 1 0 1 1 0 8 0
amappl12 168 492 0 490 1 0 1 1 0 8 0
amappl11 160 48 0 37 1 0 1 1 0 8 0
amappl10 152 36 0 28 1 0 1 1 0 8 0
amappl9 144 946 0 945 1 0 1 1 0 8 0
amappl8 136 164 0 106 2 0 2 2 0 8 0
amappl7 128 52 0 38 1 0 1 1 0 8 0
amappl6 120 340 0 325 2 1 1 2 0 8 0
amappl5 112 101 0 93 1 0 1 1 0 8 0
amappl4 104 788 0 763 2 1 1 2 0 8 0
amappl3 96 5727 0 5678 2 0 2 2 0 8 0
amappl2 88 2765 0 2699 3 1 2 3 0 8 0
amappl1 80 51862 0 51201 21 5 16 21 0 8 0
amappl 88 13288 0 13115 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 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 100 0 3 2 0 2 2 0 8 0
uaddrrnd 24 2265 0 2222 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2265 0 2222 1 0 1 1 0 8 0
vmmpekpl 168 19598 0 19542 3 0 3 3 0 8 0
vmmpepl 168 210264 0 207839 157 32 125 141 0 357 6
vmsppl 272 2264 0 2222 5 1 4 4 0 8 0
rwobjpl 24 61251 0 53636 47 0 47 47 0 8 0
pdppl 4096 4536 0 4462 208 126 82 82 0 8 8
pvpl 32 939392 0 918039 263 75 188 255 0 265 4
pmappl 216 2264 0 2222 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1186 0 383 24 0 24 24 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: -6
ddb> machine ddbcpu 1
No such command
ddb> trace
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: -6
---
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.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 77e4b1bd8000 Only include stdarg.h, if we call any of va_{..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16dc3bbb880000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=4273e3d879dea05c8b15
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b1729ebc774e/disk-77e4b1bd.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/08857ddb4968/bsd-77e4b1bd.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4255a44a191f/kernel-77e4b1bd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4273e3...@syzkaller.appspotmail.com
uvm_fault(0xffffffff829bde68, 0xffff800021273000, 0, 2) -> e
kernel: page fault trap, code=0
Stopped at kcov_remote_enter+0x112: movq $0,0(%rcx)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*409120 66134 0 0 0 0 syz-executor.4
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: 9
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
*cpu0: uvm_fault(0xffffffff829bde68, 0xffff800021273000, 0, 2) -> e
ddb> trace
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: -6
ddb> show registers
rdi 0x4
rsi 0xffff800000685d00
rbp 0xffff800021784f50
rbx 0
rdx 0xffff80002176ca90
rcx 0xffff800021273000
rax 0xfffffd807035eea0
r8 0
r9 0
r10 0x8a1cabea21770517
r11 0x5ad3c4af4ac15324
r12 0xffff800021703a40
r13 0xffffffff82937ff0 cpu_info_full_primary+0x1ff0
r14 0xffff8000217347f0
r15 0
rip 0xffffffff81de0642 kcov_remote_enter+0x112
cs 0x8
rflags 0x10297 __ALIGN_SIZE+0xf297
rsp 0xffff800021784f30
ss 0
kcov_remote_enter+0x112: movq $0,0(%rcx)
ddb> show proc
PROC (syz-executor.4) pid=409120 stat=onproc
flags process=0 proc=0
pri=83, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800021702540,0xffff80002176cfe0
process=0xffff800029a713b0 user=0xffff800021780000, vmspace=0xfffffd8071102008
estcpu=36, cpticks=2, pctcpu=0.0
user=1, sys=0, intr=1
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
28906 179364 71879 0 3 0x80 nanoslp syz-executor.7
28906 76619 71879 0 3 0x4000080 fsleep syz-executor.7
*66134 409120 11167 0 7 0 syz-executor.4
66134 234614 11167 0 2 0x4000000 syz-executor.4
7283 36079 30992 0 2 0 syz-executor.5
7283 67287 30992 0 3 0x4000080 fsleep syz-executor.5
80774 59262 72811 0 2 0 syz-executor.3
80774 462563 72811 0 3 0x4000080 fsleep syz-executor.3
72811 308637 10386 0 3 0x82 nanoslp syz-executor.3
17723 426795 0 0 3 0x14200 acct acct
93525 370949 10386 0 2 0x2 syz-executor.6
30992 28932 10386 0 3 0x82 nanoslp syz-executor.5
16503 477546 10386 0 3 0x82 piperd syz-executor.0
12547 27656 0 0 3 0x14200 bored sosplice
25073 472188 0 0 3 0x14280 nfsidl nfsio
61068 427882 0 0 3 0x14280 nfsidl nfsio
94819 105401 0 0 3 0x14280 nfsidl nfsio
70691 163970 0 0 3 0x14280 nfsidl nfsio
69523 325480 0 0 3 0x14280 nfsidl nfsio
56840 294040 0 0 3 0x14280 nfsidl nfsio
10123 334622 0 0 3 0x14280 nfsidl nfsio
33363 412238 0 0 3 0x14280 nfsidl nfsio
75880 281561 0 0 3 0x14280 nfsidl nfsio
98328 444411 0 0 3 0x14280 nfsidl nfsio
43044 231772 0 0 3 0x14280 nfsidl nfsio
77897 353836 0 0 3 0x14280 nfsidl nfsio
19813 410633 0 0 3 0x14280 nfsidl nfsio
17042 307074 0 0 3 0x14280 nfsidl nfsio
65454 375392 0 0 3 0x14280 nfsidl nfsio
53229 450254 0 0 3 0x14280 nfsidl nfsio
59671 335952 0 0 3 0x14280 nfsidl nfsio
90439 126308 0 0 3 0x14280 nfsidl nfsio
24382 133348 0 0 3 0x14280 nfsidl nfsio
2646 441692 0 0 3 0x14280 nfsidl nfsio
71879 67751 10386 0 3 0x82 nanoslp syz-executor.7
11167 39493 10386 0 3 0x82 nanoslp syz-executor.4
50570 32440 10386 0 2 0x2 syz-executor.2
82008 242714 10386 0 3 0x82 piperd syz-executor.1
10386 196013 71745 0 3 0x82 wait syz-fuzzer
10386 489622 71745 0 3 0x4000082 nanoslp syz-fuzzer
10386 115581 71745 0 3 0x4000082 wait syz-fuzzer
10386 340112 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 302137 71745 0 3 0x4000082 wait syz-fuzzer
10386 321090 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 45505 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 337899 71745 0 3 0x4000082 thrsleep syz-fuzzer
10386 401689 71745 0 3 0x4000082 wait syz-fuzzer
10386 201432 71745 0 3 0x4000082 wait syz-fuzzer
10386 413621 71745 0 3 0x4000082 wait syz-fuzzer
10386 327345 71745 0 3 0x4000082 wait syz-fuzzer
10386 150737 71745 0 3 0x4000082 wait syz-fuzzer
10386 370472 71745 0 3 0x4000082 kqread syz-fuzzer
71745 12932 3709 0 3 0x10008a sigsusp ksh
3709 39197 42987 0 3 0x9a kqread sshd
46969 47670 1 0 3 0x100083 ttyin getty
42987 139503 1 0 3 0x88 kqread sshd
59185 313347 28749 73 2 0x1100090 syslogd
28749 374232 1 0 3 0x100082 netio syslogd
26044 512353 1 0 3 0x100080 kqread resolvd
30936 63118 37031 77 3 0x100092 kqread dhcpleased
14514 29593 37031 77 3 0x100092 kqread dhcpleased
37031 192721 1 0 3 0x80 kqread dhcpleased
67182 229356 0 0 3 0x14200 bored smr
82176 478593 0 0 2 0x14200 zerothread
76675 181699 0 0 3 0x14200 aiodoned aiodoned
48661 190832 0 0 3 0x14200 syncer update
57838 195232 0 0 3 0x14200 cleaner cleaner
86374 202012 0 0 3 0x14200 reaper reaper
82626 53932 0 0 3 0x14200 pgdaemon pagedaemon
14727 72612 0 0 3 0x14200 bored viomb
77582 376253 0 0 3 0x40014200 acpi0 acpi0
86342 332842 0 0 3 0x14200 bored softnet
80932 70621 0 0 3 0x14200 bored softnet
20822 445750 0 0 3 0x14200 bored softnet
22125 268950 0 0 3 0x14200 bored softnet
47330 431063 0 0 3 0x14200 bored systqmp
81706 288172 0 0 3 0x14200 bored systq
20869 23451 0 0 3 0x40014200 bored softclock
99227 120214 0 0 3 0x40014200 idle0
1 173430 0 0 3 0x82 wait 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 10181 6418K 6814K 78643K 12734 0
pcb 13 15K 20K 78643K 637 0
rtable 196 14K 16K 78643K 836 0
ifaddr 67 15K 17K 78643K 190 0
counters 27 17K 17K 78643K 56 0
ioctlops 0 0K 4K 78643K 185 0
iov 0 0K 16K 78643K 148 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1404 88K 88K 78643K 3799 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 8 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 700 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 14 49K 69K 78643K 1987 0
sigio 0 0K 0K 78643K 3 0
proc 58 59K 83K 78643K 918 0
subproc 104 6K 6K 78643K 208 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 175 0
in_multi 78 5K 6K 78643K 213 0
ether_multi 1 0K 0K 78643K 4 0
mrt 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 49 228K 228K 78643K 49 0
exec 0 0K 1K 78643K 578 0
pfkey data 0 0K 0K 78643K 3 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 292 325K 326K 78643K 13668 0
UVM aobj 98 3K 3K 78643K 101 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 30 0
NDP 11 0K 1K 78643K 66 0
temp 124 4694K 5718K 78643K 22024 0
kqueue 12 18K 22K 78643K 137 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
rtpcb 120 131 0 128 2 1 1 2 0 8 0
rtentry 112 215 0 130 4 0 4 4 0 8 0
unpcb 144 3158 0 3145 15 11 4 6 0 8 3
syncache 296 13 0 13 4 3 1 1 0 8 1
tcpqe 32 110 0 110 3 2 1 1 0 8 1
tcpcb 776 1981 0 1975 45 37 8 14 0 8 7
arp 88 34 0 18 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 336 3394 0 3385 53 43 10 21 0 8 8
nd6 48 49 0 31 1 0 1 1 0 8 0
pkpcb 40 3 0 3 1 1 0 1 0 8 0
kcovpl 48 16 0 8 1 0 1 1 0 8 0
ppxss 1160 9 0 9 2 2 0 1 0 8 0
pppxif 1352 6 0 6 1 1 0 1 0 8 0
pfosfp 40 67 0 66 1 0 1 1 0 8 0
pfosfpen 112 67 0 66 1 0 1 1 0 8 0
pfanchor 1280 826 0 649 20 0 20 20 0 8 3
art_heap8 4096 3 0 2 2 1 1 2 0 8 0
art_heap4 256 931 0 569 34 11 23 30 0 8 0
art_table 32 934 0 571 4 0 4 4 0 8 0
art_node 16 214 0 140 1 0 1 1 0 8 0
sysvmsgpl 40 62 0 42 1 0 1 1 0 8 0
semupl 112 6 0 6 1 1 0 1 0 8 0
semapl 112 698 0 688 1 0 1 1 0 8 0
shmpl 112 98 0 3 4 1 3 3 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 4120 0 2682 91 0 91 91 0 8 0
ffsino 240 4120 0 2682 85 0 85 85 0 8 0
nchpl 144 8038 0 6407 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 29279 0 29279 2 1 1 2 0 8 1
vcpupl 2048 18 0 0 3 0 3 3 0 8 0
vmpool 536 18 0 0 2 0 2 2 0 8 0
kstatmem 264 68 0 46 2 0 2 2 0 8 0
scxspl 216 19088 0 19088 9 8 1 8 0 8 1
plimitpl 152 204 0 188 1 0 1 1 0 8 0
sigapl 424 2285 0 2222 8 0 8 8 0 8 0
futexpl 64 28407 0 28404 1 0 1 1 0 8 0
knotepl 120 28001 0 27921 15 10 5 8 0 8 2
kqueuepl 184 439 0 431 6 5 1 4 0 8 0
pipepl 288 364 0 336 5 2 3 5 0 8 0
fdescpl 432 2247 0 2222 4 0 4 4 0 8 0
filepl 120 19668 0 19429 27 15 12 15 0 8 4
lockfpl 104 295 0 293 2 1 1 2 0 8 0
lockfspl 48 145 0 143 1 0 1 1 0 8 0
sessionpl 144 31 0 15 1 0 1 1 0 8 0
pgrppl 48 31 0 15 1 0 1 1 0 8 0
ucredpl 104 2138 0 2127 1 0 1 1 0 8 0
zombiepl 144 2222 0 2222 1 0 1 1 0 8 1
processpl 1008 2285 0 2222 10 1 9 9 0 8 0
procpl 672 5028 0 4948 12 3 9 9 0 8 0
sosppl 168 14 0 14 4 4 0 1 0 8 0
sockpl 456 6686 0 6661 146 134 12 34 0 8 8
mcl64k 65536 49 0 49 5 4 1 1 0 8 1
mcl16k 16384 246 0 246 1 0 1 1 0 8 1
mcl12k 12288 38 0 38 5 4 1 1 0 8 1
mcl9k 9216 15 0 15 3 3 0 1 0 8 0
mcl8k 8192 83 0 83 4 3 1 1 0 8 1
mcl4k 4096 210 0 210 1 0 1 1 0 8 1
mcl2k2 2112 7 0 7 4 3 1 1 0 8 1
mcl2k 2048 76105 0 76036 36 26 10 32 0 8 0
mtagpl 96 146 0 123 4 2 2 3 0 8 0
mbufpl 256 142957 0 142684 196 163 33 69 0 8 8
bufpl 288 6554 0 281 449 0 449 449 0 8 0
anonpl 24 443120 0 426829 111 4 107 107 0 188 3
amapchunkpl 152 38287 0 37616 34 4 30 30 0 158 2
amappl16 200 5005 0 4470 34 2 32 32 0 8 3
amappl15 192 5 0 5 1 1 0 1 0 8 0
amappl14 184 175 0 163 2 1 1 2 0 8 0
amappl13 176 3 0 2 1 0 1 1 0 8 0
amappl12 168 492 0 490 1 0 1 1 0 8 0
amappl11 160 48 0 37 1 0 1 1 0 8 0
amappl10 152 36 0 28 1 0 1 1 0 8 0
amappl9 144 946 0 945 1 0 1 1 0 8 0
amappl8 136 164 0 106 2 0 2 2 0 8 0
amappl7 128 52 0 38 1 0 1 1 0 8 0
amappl6 120 340 0 325 2 1 1 2 0 8 0
amappl5 112 101 0 93 1 0 1 1 0 8 0
amappl4 104 788 0 763 2 1 1 2 0 8 0
amappl3 96 5727 0 5678 2 0 2 2 0 8 0
amappl2 88 2765 0 2699 3 1 2 3 0 8 0
amappl1 80 51862 0 51201 21 5 16 21 0 8 0
amappl 88 13288 0 13115 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 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 100 0 3 2 0 2 2 0 8 0
uaddrrnd 24 2265 0 2222 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2265 0 2222 1 0 1 1 0 8 0
vmmpekpl 168 19598 0 19542 3 0 3 3 0 8 0
vmmpepl 168 210264 0 207839 157 32 125 141 0 357 6
vmsppl 272 2264 0 2222 5 1 4 4 0 8 0
rwobjpl 24 61251 0 53636 47 0 47 47 0 8 0
pdppl 4096 4536 0 4462 208 126 82 82 0 8 8
pvpl 32 939392 0 918039 263 75 188 255 0 265 4
pmappl 216 2264 0 2222 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1186 0 383 24 0 24 24 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: -6
ddb> machine ddbcpu 1
No such command
ddb> trace
kcov_remote_enter(0,ffff8000217347f0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff800021703b00) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff800021703b00,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd4500, count: -6
---
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syzbot
Jun 25, 2023, 4:12:46 PM6/25/23
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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