KASAN: invalid memory access in uvm_map_lookup_entry
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syzbot
Jul 14, 2026, 8:58:33 AM (7 days ago) Jul 14
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 85db861bb080 kasan: debug free-quarantine for M_PINSYSCALL
git tree: https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan
console output: https://syzkaller.appspot.com/x/log.txt?x=17ae7346580000
kernel config: https://syzkaller.appspot.com/x/.config?x=85e25e37d09e1b88
dashboard link: https://syzkaller.appspot.com/bug?extid=782ca1885a1f559feb27
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/87595791d0f2/disk-85db861b.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/1331da1397a6/bsd-85db861b.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4039558e70dc/kernel-85db861b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+782ca1...@syzkaller.appspotmail.com
panic: Caught invalid memory access at ffff8000018c9c10 size 36 op 1
Stopped at db_enter+0x17: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 91171 80614 0 0x10 0x4000000 0 syz-executor
474944 85809 0 0 0x4000000 1 syz-executor
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff84632841) at panic+0x270 sys/kern/subr_prf.c:198
kasan_memcpy(ffff8000018c9c10,ffff8000299c8460,24) at kasan_memcpy+0x1ec
sysctl_sysvipc(ffff8000299c8b28,1,200000000180,ffff8000299c8b00) at sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
kern_sysctl_dirs(33,ffff8000299c8b28,1,200000000180,ffff8000299c8b00,0,1,1ffff000053390dc) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
kern_sysctl(ffff8000299c8b24,2,200000000180,ffff8000299c8b00,0,fffa,ffff8000299c8d80) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
sys_sysctl(ffff800029922fa0,ffff8000299c8d80,ffff8000299c8ce0) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
syscall(ffff8000299c8d80) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000299c8d80) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e47ec15e60, count: 6
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: Caught invalid memory access at ffff8000018c9c10 size 36 op 1
ddb{0}> show kasan
KASAN: invalid write of 36 bytes at 0xffff8000018c9c10 from pc 0xffffffff83b24217
KASAN: first bad byte at 0xffff8000018c9c14 (+4); shadow 0x04: partial granule (out-of-bounds)
KASAN: 0xffff8000018c9c14 is 4 bytes inside the 16-byte malloc slot [0xffff8000018c9c10..0xffff8000018c9c20)
KASAN: allocated at:
#0 malloc+0xda0 sys/kern/kern_malloc.c:446
#1 sysctl_sysvipc+0x377 sys/kern/kern_sysctl.c:-1
#2 kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
#3 kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
#4 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
KASAN: pc: sysctl_sysvipc+0x397
KASAN: call trace:
#0 kasan_memcpy+0x1ca kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline]
#0 kasan_memcpy+0x1ca sys/kern/subr_kasan.c:1025
#1 sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
#2 kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
#3 kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
#4 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
KASAN: shadow of 0xffff8000018c9b00..0xffff8000018c9d80 (1 cell = 8 bytes):
0xffff8000018c9b00: fc 08 fc 08 fc 08 fc 08 fc 08 fc 08 04 fb fc 08
0xffff8000018c9b80: fc 08 fc 08 fc 08 fc 08 fc 08 fc 08 fc 08 06 fb
>0xffff8000018c9c00: fc 08[04]fb 08 08 08 08 08 08 08 08 08 08 08 08
0xffff8000018c9c80: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
0xffff8000018c9d00: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff84632841) at panic+0x270 sys/kern/subr_prf.c:198
kasan_memcpy(ffff8000018c9c10,ffff8000299c8460,24) at kasan_memcpy+0x1ec
sysctl_sysvipc(ffff8000299c8b28,1,200000000180,ffff8000299c8b00) at sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
kern_sysctl_dirs(33,ffff8000299c8b28,1,200000000180,ffff8000299c8b00,0,1,1ffff000053390dc) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
kern_sysctl(ffff8000299c8b24,2,200000000180,ffff8000299c8b00,0,fffa,ffff8000299c8d80) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
sys_sysctl(ffff800029922fa0,ffff8000299c8d80,ffff8000299c8ce0) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
syscall(ffff8000299c8d80) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000299c8d80) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e47ec15e60, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000299c8270
rbx 0xffff8000299c82e0
rdx 0
rcx 0xffffffff84ed0ff0 cpu_info_full_primary+0x1ff0
rax 0xffff80000016da80
r8 0x101010101010101
r9 0x8080808080808080
r10 0xffff8000299c8058
r11 0xffffffff82322ea0 x86_bus_space_io_read_1
r12 0xffffffff84632841 switch.table.vce_v1_0_load_fw+0x99e41
r13 0xffffffff84ed1c08 cpu_info_full_primary+0x2c08
r14 0xffffffff84ed1e07 cpu_info_full_primary+0x2e07
r15 0x1
rip 0xffffffff81734fa7 db_enter+0x17
cs 0x8
rflags 0x246
rsp 0xffff8000299c8270
ss 0x10
db_enter+0x17: popq %rbp
ddb{0}> show proc
PROC (syz-executor) tid=91171 pid=80614 tcnt=2 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=32, usrpri=77, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800029922a70,0xffffffff85d1b980
process=0xffff800033f01830 user=0xffff8000299bd000, vmspace=0xffff800001c395d0
estcpu=27, cpticks=25, pctcpu=0.6, user=0, sys=24, intr=1
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
80614 166522 73417 0 2 0x10 syz-executor
*80614 91171 73417 0 7 0x4000010 syz-executor
57906 475435 40827 0 2 0xc80 syz-executor
57906 486724 40827 0 3 0x4000080 kqpoll syz-executor
57906 243717 40827 0 3 0x4000080 fsleep syz-executor
12875 48416 41016 0 2 0xc80 syz-executor
12875 425315 41016 0 2 0x4000080 syz-executor
12875 361610 41016 0 3 0x4000080 fsleep syz-executor
12875 64245 41016 0 3 0x4000080 fsleep syz-executor
65474 481754 1 0 3 0x80 nanoslp init
85809 390671 30080 0 2 0 syz-executor
85809 474944 30080 0 7 0x4000000 syz-executor
66618 77735 68390 0 2 0x10 syz-executor
66618 246513 68390 0 3 0x4000090 fsleep syz-executor
66618 235376 68390 0 3 0x4000090 fsleep syz-executor
66618 503278 68390 0 3 0x4000090 fsleep syz-executor
88717 42536 8834 0 3 0x100082 sbwait ndp
8834 133940 23712 0 3 0x10008a sigsusp sh
40827 171134 47618 0 2 0xc82 syz-executor
68390 401356 47618 0 2 0xc82 syz-executor
41016 441069 47618 0 2 0xc82 syz-executor
9469 338769 47618 0 2 0xc82 syz-executor
23712 267937 47618 0 3 0x82 wait syz-executor
73417 290675 47618 0 2 0xc82 syz-executor
11401 185025 47618 0 2 0xc82 syz-executor
30080 132577 47618 0 2 0xc82 syz-executor
47618 89436 1 0 3 0x82 kqread syz-executor
64714 44694 1 74 3 0x1100092 bpf pflogd
23850 101499 1 73 2 0x1100090 syslogd
54046 345863 0 0 2 0x40014200 smr
37663 127363 0 0 2 0x14200 zerothread
3864 335780 0 0 3 0x14200 aiodoned aiodoned
44847 108306 0 0 2 0x14e00 update
56169 85716 0 0 3 0x14200 cleaner cleaner
56157 209530 0 0 3 0x14200 reaper reaper
94182 476187 0 0 3 0x14200 pgdaemon pagedaemon
71304 435794 0 0 3 0x14200 bored viomb
9191 161377 0 0 3 0x40014200 acpi0 acpi0
22236 151035 0 0 3 0x40014200 idle1
15001 54275 0 0 3 0x14200 bored softnet1
90129 343707 0 0 2 0x14200 softnet0
36348 405164 0 0 2 0x14200 systqmp
36659 304360 0 0 3 0x14200 bored systq
30270 235265 0 0 2 0x14200 softclockmp
50763 343012 0 0 3 0x40014200 tmoslp softclock
63079 203840 0 0 3 0x40014200 idle0
1 500263 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 85809 (syz-executor) thread 0xffff800033efed20 (474944)
shared rwlock vmmaplk r = 0 (0xffff8000017bb6c0)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x55d sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x1a2 sys/uvm/uvm_fault.c:-1
#3 uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
#5 kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
#7 alltraps_kern_meltdown+0x7b
#8 copyout+0x59
#9 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11055 12310K 12389K 166960K 12196 0
pcb 17 24K 24K 166960K 25 0
rtable 235 12K 13K 166960K 347 0
pf 34 22K 22K 166960K 46 0
ifaddr 43 12K 12K 166960K 45 0
ifgroup 55 2K 2K 166960K 55 0
sysctl 3 1K 13K 166960K 7 0
counters 70 42K 42K 166960K 70 0
ioctlops 0 0K 4K 166960K 1522 0
iov 0 0K 16K 166960K 3 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1296 83K 83K 166960K 1398 0
UFS quota 1 36K 36K 166960K 1 0
UFS mount 5 44K 44K 166960K 5 0
shm 3 6K 14K 166960K 6 0
VM map 2 1K 1K 166960K 2 0
sem 7 0K 0K 166960K 8 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 292K 166960K 11964 0
file desc 19 69K 97K 166960K 192 0
sigio 0 0K 0K 166960K 34 0
proc 12 46K 209K 166960K 576 0
subproc 72 9K 9K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 20K 20K 166960K 1 0
ip_moptions 0 0K 0K 166960K 5 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 36K 36K 166960K 1 0
MSDOSFS mount 1 20K 20K 166960K 1 0
ttys 67 465K 465K 166960K 67 0
exec 0 0K 2K 166960K 387 0
fusefs mount 1 36K 36K 166960K 1 0
tdb 3 1K 1K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 171 139K 242K 166960K 3614 0
UVM aobj 9 4K 4K 166960K 10 0
pinsyscall 1049 1714K 1730K 166960K 1356 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 12 0K 2K 166960K 28 0
temp 35 9166K 9176K 166960K 4056 0
kqueue 5 17K 44K 166960K 38 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 34 0 33 1 0 1 1 0 8 0
rtentry 176 110 0 1 5 0 5 5 0 8 0
unpcb 144 107 0 102 2 0 2 2 0 8 1
syncache 336 4 0 4 1 0 1 1 0 8 1
tcpcb 736 10 0 9 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 85 0 79 2 0 2 2 0 8 1
nd6 152 23 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 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 24 0 0 1 0 1 1 0 8 0
pfstkey 128 24 0 0 1 0 1 1 0 8 0
pfstate 448 24 0 0 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 451 0 0 29 0 29 29 0 8 0
art_table 40 452 0 0 5 0 5 5 0 8 0
art_node 32 110 0 11 1 0 1 1 0 8 0
semapl 72 6 0 1 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1663 0 193 93 0 93 93 0 8 0
ffsino 296 1663 0 193 114 0 114 114 0 8 0
nchpl 144 1943 0 239 64 0 64 64 0 8 0
vnodes 216 1777 0 0 99 0 99 99 0 8 0
namei 1024 6419 0 6419 1 0 1 1 0 8 1
percpumem 16 51 0 0 1 0 1 1 0 8 0
kstatmem 264 27 0 0 2 0 2 2 0 8 0
scxspl 216 7074 0 7074 4 3 1 3 1 8 1
plimitpl 152 34 0 22 1 0 1 1 0 8 0
sigapl 424 512 0 473 7 0 7 7 0 8 0
knotepl 120 55 0 0 2 0 2 2 0 8 0
kqueuepl 224 117 0 110 5 0 5 5 0 8 4
pipepl 344 169 0 142 6 0 6 6 0 8 3
fdescpl 528 496 0 473 3 0 3 3 0 8 0
filepl 160 2209 0 2014 14 0 14 14 0 8 4
lockfpl 104 26 0 25 1 0 1 1 0 8 0
lockfspl 48 12 0 11 1 0 1 1 0 8 0
sessionpl 144 31 0 26 1 0 1 1 0 8 0
pgrppl 48 39 0 26 1 0 1 1 0 8 0
ucredpl 104 178 0 169 1 0 1 1 0 8 0
zombiepl 144 475 0 473 1 0 1 1 0 8 0
processpl 1232 512 0 473 5 0 5 5 0 8 0
procpl 664 619 0 570 6 0 6 6 0 8 1
sockpl 752 259 0 247 6 0 6 6 0 8 3
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 114 0 0 15 0 15 15 0 8 0
mcl2k 2048 23 0 0 3 0 3 3 0 8 0
mextrefs 64 24 0 0 1 0 1 1 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 188 0 0 12 0 12 12 0 8 0
bufpl 272 2450 0 105 157 0 157 157 0 8 0
anonpl 32 3809 0 0 31 0 31 31 0 222 0
amapchunkpl 152 10030 0 9604 20 0 20 20 0 158 3
amappl16 200 1911 0 1843 6 2 4 5 0 8 0
amappl15 192 39 0 39 1 1 0 1 0 8 0
amappl14 184 435 0 433 1 0 1 1 0 8 0
amappl13 176 125 0 122 1 0 1 1 0 8 0
amappl12 168 754 0 732 2 0 2 2 0 8 0
amappl11 160 4 0 3 1 0 1 1 0 8 0
amappl10 152 64 0 60 1 0 1 1 0 8 0
amappl9 144 274 0 274 1 1 0 1 0 8 0
amappl8 136 102 0 101 1 0 1 1 0 8 0
amappl7 128 147 0 141 1 0 1 1 0 8 0
amappl6 120 178 0 177 1 0 1 1 0 8 0
amappl5 112 103 0 101 1 0 1 1 0 8 0
amappl4 104 293 0 285 1 0 1 1 0 8 0
amappl3 96 1854 0 1761 3 0 3 3 0 8 0
amappl2 88 543 0 527 2 0 2 2 0 8 0
amappl1 80 10608 0 10420 16 1 15 16 0 8 2
amappl 88 2876 0 2733 4 0 4 4 0 92 0
uvmvnodes 80 101 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 496 0 473 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 496 0 473 1 0 1 1 0 8 0
vmmpekpl 168 6322 0 6289 2 0 2 2 0 8 0
vmmpepl 168 41055 0 39937 90 0 90 90 0 357 33
vmsppl 488 495 0 473 5 0 5 5 0 8 1
rwobjpl 80 15253 0 14663 25 0 25 25 0 8 2
pdppl 4096 1001 0 946 97 38 59 89 0 8 4
pvpl 32 9673 0 0 80 1 79 79 0 265 0
pmappl 256 495 0 473 3 0 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 426 0 41 12 0 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff84632841) at panic+0x270 sys/kern/subr_prf.c:198
kasan_memcpy(ffff8000018c9c10,ffff8000299c8460,24) at kasan_memcpy+0x1ec
sysctl_sysvipc(ffff8000299c8b28,1,200000000180,ffff8000299c8b00) at sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
kern_sysctl_dirs(33,ffff8000299c8b28,1,200000000180,ffff8000299c8b00,0,1,1ffff000053390dc) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
kern_sysctl(ffff8000299c8b24,2,200000000180,ffff8000299c8b00,0,fffa,ffff8000299c8d80) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
sys_sysctl(ffff800029922fa0,ffff8000299c8d80,ffff8000299c8ce0) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
syscall(ffff8000299c8d80) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000299c8d80) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e47ec15e60, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x19: leave
x86_ipi_db(ffff800028ff3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc kasan_shadow_check sys/kern/subr_kasan.c:1098 [inline]
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc sys/kern/subr_kasan.c:1098
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 vm_map_assert_anylock_ln sys/uvm/uvm_map.c:5308 [inline]
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 sys/uvm/uvm_map.c:1569
uvmfault_lookup(ffff80003b333800,0) at uvmfault_lookup+0x1dd sys/uvm/uvm_fault.c:1880
uvm_fault_check(ffff80003b333800,ffff80003b3337a8,ffff80003b333798,0) at uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
uvm_fault(ffff8000017bb5c0,301000,0,2) at uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80003b333ae0,301680) at kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003b333ae0) at kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x59
syscall(ffff80003b3340e0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003b3340e0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb738c931380, count: 1
ddb{1}> trace
x86_ipi_db(ffff800028ff3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc kasan_shadow_check sys/kern/subr_kasan.c:1098 [inline]
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc sys/kern/subr_kasan.c:1098
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 vm_map_assert_anylock_ln sys/uvm/uvm_map.c:5308 [inline]
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 sys/uvm/uvm_map.c:1569
uvmfault_lookup(ffff80003b333800,0) at uvmfault_lookup+0x1dd sys/uvm/uvm_fault.c:1880
uvm_fault_check(ffff80003b333800,ffff80003b3337a8,ffff80003b333798,0) at uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
uvm_fault(ffff8000017bb5c0,301000,0,2) at uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80003b333ae0,301680) at kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003b333ae0) at kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x59
syscall(ffff80003b3340e0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003b3340e0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb738c931380, count: -14
ddb{1}>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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#syz undup
syzbot found the following issue on:
HEAD commit: 85db861bb080 kasan: debug free-quarantine for M_PINSYSCALL
git tree: https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan
console output: https://syzkaller.appspot.com/x/log.txt?x=17ae7346580000
kernel config: https://syzkaller.appspot.com/x/.config?x=85e25e37d09e1b88
dashboard link: https://syzkaller.appspot.com/bug?extid=782ca1885a1f559feb27
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/87595791d0f2/disk-85db861b.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/1331da1397a6/bsd-85db861b.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4039558e70dc/kernel-85db861b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+782ca1...@syzkaller.appspotmail.com
panic: Caught invalid memory access at ffff8000018c9c10 size 36 op 1
Stopped at db_enter+0x17: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 91171 80614 0 0x10 0x4000000 0 syz-executor
474944 85809 0 0 0x4000000 1 syz-executor
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff84632841) at panic+0x270 sys/kern/subr_prf.c:198
kasan_memcpy(ffff8000018c9c10,ffff8000299c8460,24) at kasan_memcpy+0x1ec
sysctl_sysvipc(ffff8000299c8b28,1,200000000180,ffff8000299c8b00) at sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
kern_sysctl_dirs(33,ffff8000299c8b28,1,200000000180,ffff8000299c8b00,0,1,1ffff000053390dc) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
kern_sysctl(ffff8000299c8b24,2,200000000180,ffff8000299c8b00,0,fffa,ffff8000299c8d80) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
sys_sysctl(ffff800029922fa0,ffff8000299c8d80,ffff8000299c8ce0) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
syscall(ffff8000299c8d80) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000299c8d80) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e47ec15e60, count: 6
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: Caught invalid memory access at ffff8000018c9c10 size 36 op 1
ddb{0}> show kasan
KASAN: invalid write of 36 bytes at 0xffff8000018c9c10 from pc 0xffffffff83b24217
KASAN: first bad byte at 0xffff8000018c9c14 (+4); shadow 0x04: partial granule (out-of-bounds)
KASAN: 0xffff8000018c9c14 is 4 bytes inside the 16-byte malloc slot [0xffff8000018c9c10..0xffff8000018c9c20)
KASAN: allocated at:
#0 malloc+0xda0 sys/kern/kern_malloc.c:446
#1 sysctl_sysvipc+0x377 sys/kern/kern_sysctl.c:-1
#2 kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
#3 kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
#4 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
KASAN: pc: sysctl_sysvipc+0x397
KASAN: call trace:
#0 kasan_memcpy+0x1ca kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline]
#0 kasan_memcpy+0x1ca sys/kern/subr_kasan.c:1025
#1 sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
#2 kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
#3 kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
#4 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
#5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
KASAN: shadow of 0xffff8000018c9b00..0xffff8000018c9d80 (1 cell = 8 bytes):
0xffff8000018c9b00: fc 08 fc 08 fc 08 fc 08 fc 08 fc 08 04 fb fc 08
0xffff8000018c9b80: fc 08 fc 08 fc 08 fc 08 fc 08 fc 08 fc 08 06 fb
>0xffff8000018c9c00: fc 08[04]fb 08 08 08 08 08 08 08 08 08 08 08 08
0xffff8000018c9c80: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
0xffff8000018c9d00: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08
KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff84632841) at panic+0x270 sys/kern/subr_prf.c:198
kasan_memcpy(ffff8000018c9c10,ffff8000299c8460,24) at kasan_memcpy+0x1ec
sysctl_sysvipc(ffff8000299c8b28,1,200000000180,ffff8000299c8b00) at sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
kern_sysctl_dirs(33,ffff8000299c8b28,1,200000000180,ffff8000299c8b00,0,1,1ffff000053390dc) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
kern_sysctl(ffff8000299c8b24,2,200000000180,ffff8000299c8b00,0,fffa,ffff8000299c8d80) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
sys_sysctl(ffff800029922fa0,ffff8000299c8d80,ffff8000299c8ce0) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
syscall(ffff8000299c8d80) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000299c8d80) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e47ec15e60, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000299c8270
rbx 0xffff8000299c82e0
rdx 0
rcx 0xffffffff84ed0ff0 cpu_info_full_primary+0x1ff0
rax 0xffff80000016da80
r8 0x101010101010101
r9 0x8080808080808080
r10 0xffff8000299c8058
r11 0xffffffff82322ea0 x86_bus_space_io_read_1
r12 0xffffffff84632841 switch.table.vce_v1_0_load_fw+0x99e41
r13 0xffffffff84ed1c08 cpu_info_full_primary+0x2c08
r14 0xffffffff84ed1e07 cpu_info_full_primary+0x2e07
r15 0x1
rip 0xffffffff81734fa7 db_enter+0x17
cs 0x8
rflags 0x246
rsp 0xffff8000299c8270
ss 0x10
db_enter+0x17: popq %rbp
ddb{0}> show proc
PROC (syz-executor) tid=91171 pid=80614 tcnt=2 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=32, usrpri=77, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800029922a70,0xffffffff85d1b980
process=0xffff800033f01830 user=0xffff8000299bd000, vmspace=0xffff800001c395d0
estcpu=27, cpticks=25, pctcpu=0.6, user=0, sys=24, intr=1
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
80614 166522 73417 0 2 0x10 syz-executor
*80614 91171 73417 0 7 0x4000010 syz-executor
57906 475435 40827 0 2 0xc80 syz-executor
57906 486724 40827 0 3 0x4000080 kqpoll syz-executor
57906 243717 40827 0 3 0x4000080 fsleep syz-executor
12875 48416 41016 0 2 0xc80 syz-executor
12875 425315 41016 0 2 0x4000080 syz-executor
12875 361610 41016 0 3 0x4000080 fsleep syz-executor
12875 64245 41016 0 3 0x4000080 fsleep syz-executor
65474 481754 1 0 3 0x80 nanoslp init
85809 390671 30080 0 2 0 syz-executor
85809 474944 30080 0 7 0x4000000 syz-executor
66618 77735 68390 0 2 0x10 syz-executor
66618 246513 68390 0 3 0x4000090 fsleep syz-executor
66618 235376 68390 0 3 0x4000090 fsleep syz-executor
66618 503278 68390 0 3 0x4000090 fsleep syz-executor
88717 42536 8834 0 3 0x100082 sbwait ndp
8834 133940 23712 0 3 0x10008a sigsusp sh
40827 171134 47618 0 2 0xc82 syz-executor
68390 401356 47618 0 2 0xc82 syz-executor
41016 441069 47618 0 2 0xc82 syz-executor
9469 338769 47618 0 2 0xc82 syz-executor
23712 267937 47618 0 3 0x82 wait syz-executor
73417 290675 47618 0 2 0xc82 syz-executor
11401 185025 47618 0 2 0xc82 syz-executor
30080 132577 47618 0 2 0xc82 syz-executor
47618 89436 1 0 3 0x82 kqread syz-executor
64714 44694 1 74 3 0x1100092 bpf pflogd
23850 101499 1 73 2 0x1100090 syslogd
54046 345863 0 0 2 0x40014200 smr
37663 127363 0 0 2 0x14200 zerothread
3864 335780 0 0 3 0x14200 aiodoned aiodoned
44847 108306 0 0 2 0x14e00 update
56169 85716 0 0 3 0x14200 cleaner cleaner
56157 209530 0 0 3 0x14200 reaper reaper
94182 476187 0 0 3 0x14200 pgdaemon pagedaemon
71304 435794 0 0 3 0x14200 bored viomb
9191 161377 0 0 3 0x40014200 acpi0 acpi0
22236 151035 0 0 3 0x40014200 idle1
15001 54275 0 0 3 0x14200 bored softnet1
90129 343707 0 0 2 0x14200 softnet0
36348 405164 0 0 2 0x14200 systqmp
36659 304360 0 0 3 0x14200 bored systq
30270 235265 0 0 2 0x14200 softclockmp
50763 343012 0 0 3 0x40014200 tmoslp softclock
63079 203840 0 0 3 0x40014200 idle0
1 500263 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 85809 (syz-executor) thread 0xffff800033efed20 (474944)
shared rwlock vmmaplk r = 0 (0xffff8000017bb6c0)
#0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x632 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x55d sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x1a2 sys/uvm/uvm_fault.c:-1
#3 uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
#5 kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
#7 alltraps_kern_meltdown+0x7b
#8 copyout+0x59
#9 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11055 12310K 12389K 166960K 12196 0
pcb 17 24K 24K 166960K 25 0
rtable 235 12K 13K 166960K 347 0
pf 34 22K 22K 166960K 46 0
ifaddr 43 12K 12K 166960K 45 0
ifgroup 55 2K 2K 166960K 55 0
sysctl 3 1K 13K 166960K 7 0
counters 70 42K 42K 166960K 70 0
ioctlops 0 0K 4K 166960K 1522 0
iov 0 0K 16K 166960K 3 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1296 83K 83K 166960K 1398 0
UFS quota 1 36K 36K 166960K 1 0
UFS mount 5 44K 44K 166960K 5 0
shm 3 6K 14K 166960K 6 0
VM map 2 1K 1K 166960K 2 0
sem 7 0K 0K 166960K 8 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 292K 166960K 11964 0
file desc 19 69K 97K 166960K 192 0
sigio 0 0K 0K 166960K 34 0
proc 12 46K 209K 166960K 576 0
subproc 72 9K 9K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 20K 20K 166960K 1 0
ip_moptions 0 0K 0K 166960K 5 0
in_multi 99 7K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 4 0
ISOFS mount 1 36K 36K 166960K 1 0
MSDOSFS mount 1 20K 20K 166960K 1 0
ttys 67 465K 465K 166960K 67 0
exec 0 0K 2K 166960K 387 0
fusefs mount 1 36K 36K 166960K 1 0
tdb 3 1K 1K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 171 139K 242K 166960K 3614 0
UVM aobj 9 4K 4K 166960K 10 0
pinsyscall 1049 1714K 1730K 166960K 1356 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
NDP 12 0K 2K 166960K 28 0
temp 35 9166K 9176K 166960K 4056 0
kqueue 5 17K 44K 166960K 38 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 34 0 33 1 0 1 1 0 8 0
rtentry 176 110 0 1 5 0 5 5 0 8 0
unpcb 144 107 0 102 2 0 2 2 0 8 1
syncache 336 4 0 4 1 0 1 1 0 8 1
tcpcb 736 10 0 9 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 85 0 79 2 0 2 2 0 8 1
nd6 152 23 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 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 24 0 0 1 0 1 1 0 8 0
pfstkey 128 24 0 0 1 0 1 1 0 8 0
pfstate 448 24 0 0 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 451 0 0 29 0 29 29 0 8 0
art_table 40 452 0 0 5 0 5 5 0 8 0
art_node 32 110 0 11 1 0 1 1 0 8 0
semapl 72 6 0 1 1 0 1 1 0 8 0
shmpl 112 7 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1663 0 193 93 0 93 93 0 8 0
ffsino 296 1663 0 193 114 0 114 114 0 8 0
nchpl 144 1943 0 239 64 0 64 64 0 8 0
vnodes 216 1777 0 0 99 0 99 99 0 8 0
namei 1024 6419 0 6419 1 0 1 1 0 8 1
percpumem 16 51 0 0 1 0 1 1 0 8 0
kstatmem 264 27 0 0 2 0 2 2 0 8 0
scxspl 216 7074 0 7074 4 3 1 3 1 8 1
plimitpl 152 34 0 22 1 0 1 1 0 8 0
sigapl 424 512 0 473 7 0 7 7 0 8 0
knotepl 120 55 0 0 2 0 2 2 0 8 0
kqueuepl 224 117 0 110 5 0 5 5 0 8 4
pipepl 344 169 0 142 6 0 6 6 0 8 3
fdescpl 528 496 0 473 3 0 3 3 0 8 0
filepl 160 2209 0 2014 14 0 14 14 0 8 4
lockfpl 104 26 0 25 1 0 1 1 0 8 0
lockfspl 48 12 0 11 1 0 1 1 0 8 0
sessionpl 144 31 0 26 1 0 1 1 0 8 0
pgrppl 48 39 0 26 1 0 1 1 0 8 0
ucredpl 104 178 0 169 1 0 1 1 0 8 0
zombiepl 144 475 0 473 1 0 1 1 0 8 0
processpl 1232 512 0 473 5 0 5 5 0 8 0
procpl 664 619 0 570 6 0 6 6 0 8 1
sockpl 752 259 0 247 6 0 6 6 0 8 3
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 114 0 0 15 0 15 15 0 8 0
mcl2k 2048 23 0 0 3 0 3 3 0 8 0
mextrefs 64 24 0 0 1 0 1 1 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 188 0 0 12 0 12 12 0 8 0
bufpl 272 2450 0 105 157 0 157 157 0 8 0
anonpl 32 3809 0 0 31 0 31 31 0 222 0
amapchunkpl 152 10030 0 9604 20 0 20 20 0 158 3
amappl16 200 1911 0 1843 6 2 4 5 0 8 0
amappl15 192 39 0 39 1 1 0 1 0 8 0
amappl14 184 435 0 433 1 0 1 1 0 8 0
amappl13 176 125 0 122 1 0 1 1 0 8 0
amappl12 168 754 0 732 2 0 2 2 0 8 0
amappl11 160 4 0 3 1 0 1 1 0 8 0
amappl10 152 64 0 60 1 0 1 1 0 8 0
amappl9 144 274 0 274 1 1 0 1 0 8 0
amappl8 136 102 0 101 1 0 1 1 0 8 0
amappl7 128 147 0 141 1 0 1 1 0 8 0
amappl6 120 178 0 177 1 0 1 1 0 8 0
amappl5 112 103 0 101 1 0 1 1 0 8 0
amappl4 104 293 0 285 1 0 1 1 0 8 0
amappl3 96 1854 0 1761 3 0 3 3 0 8 0
amappl2 88 543 0 527 2 0 2 2 0 8 0
amappl1 80 10608 0 10420 16 1 15 16 0 8 2
amappl 88 2876 0 2733 4 0 4 4 0 92 0
uvmvnodes 80 101 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 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 9 0 1 1 0 1 1 0 8 0
uaddrrnd 24 496 0 473 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 496 0 473 1 0 1 1 0 8 0
vmmpekpl 168 6322 0 6289 2 0 2 2 0 8 0
vmmpepl 168 41055 0 39937 90 0 90 90 0 357 33
vmsppl 488 495 0 473 5 0 5 5 0 8 1
rwobjpl 80 15253 0 14663 25 0 25 25 0 8 2
pdppl 4096 1001 0 946 97 38 59 89 0 8 4
pvpl 32 9673 0 0 80 1 79 79 0 265 0
pmappl 256 495 0 473 3 0 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 426 0 41 12 0 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
panic(ffffffff84632841) at panic+0x270 sys/kern/subr_prf.c:198
kasan_memcpy(ffff8000018c9c10,ffff8000299c8460,24) at kasan_memcpy+0x1ec
sysctl_sysvipc(ffff8000299c8b28,1,200000000180,ffff8000299c8b00) at sysctl_sysvipc+0x397 sys/kern/kern_sysctl.c:2712
kern_sysctl_dirs(33,ffff8000299c8b28,1,200000000180,ffff8000299c8b00,0,1,1ffff000053390dc) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429
kern_sysctl(ffff8000299c8b24,2,200000000180,ffff8000299c8b00,0,fffa,ffff8000299c8d80) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529
sys_sysctl(ffff800029922fa0,ffff8000299c8d80,ffff8000299c8ce0) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309
syscall(ffff8000299c8d80) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000299c8d80) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e47ec15e60, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x19: leave
x86_ipi_db(ffff800028ff3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc kasan_shadow_check sys/kern/subr_kasan.c:1098 [inline]
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc sys/kern/subr_kasan.c:1098
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 vm_map_assert_anylock_ln sys/uvm/uvm_map.c:5308 [inline]
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 sys/uvm/uvm_map.c:1569
uvmfault_lookup(ffff80003b333800,0) at uvmfault_lookup+0x1dd sys/uvm/uvm_fault.c:1880
uvm_fault_check(ffff80003b333800,ffff80003b3337a8,ffff80003b333798,0) at uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
uvm_fault(ffff8000017bb5c0,301000,0,2) at uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80003b333ae0,301680) at kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003b333ae0) at kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x59
syscall(ffff80003b3340e0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003b3340e0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb738c931380, count: 1
ddb{1}> trace
x86_ipi_db(ffff800028ff3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412
x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc kasan_shadow_check sys/kern/subr_kasan.c:1098 [inline]
__asan_load4_noabort(ffff8000017bb5e4) at __asan_load4_noabort+0xc sys/kern/subr_kasan.c:1098
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 vm_map_assert_anylock_ln sys/uvm/uvm_map.c:5308 [inline]
uvm_map_lookup_entry(ffff8000017bb5c0,301000,ffff80003b333828) at uvm_map_lookup_entry+0x37 sys/uvm/uvm_map.c:1569
uvmfault_lookup(ffff80003b333800,0) at uvmfault_lookup+0x1dd sys/uvm/uvm_fault.c:1880
uvm_fault_check(ffff80003b333800,ffff80003b3337a8,ffff80003b333798,0) at uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693
uvm_fault(ffff8000017bb5c0,301000,0,2) at uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80003b333ae0,301680) at kpageflttrap+0x41e sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003b333ae0) at kerntrap+0x1b6 sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x59
syscall(ffff80003b3340e0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003b3340e0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb738c931380, count: -14
ddb{1}>
---
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Greg Steuck
Jul 15, 2026, 5:38:11 AM (6 days ago) Jul 15
to syzbot, syzkaller-openbsd-bugs
#syz dup: KASAN: invalid memory access in sysctl_sysvipc
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