panic: WApRoNoIlN_Gc: aScPheL _NiOteTm L_OmWaEgRiEc_D cOhNe cSkY:S CmAbLuLf p2l 10c3p6u9 9f6r2ee10 lEiXsIt T mo0 dai
f
iStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*506000 76965 0 0x2 0 0 syz-executor.1
244819 11775 0 0x14000 0x200 1 softnet
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffea920, count: 14
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806828da00+16 0x0!=0xc38d9f59f59a8601
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffea920, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020b97610
rbx 0
rdx 0xffff800020ace780
rcx 0
rax 0x3a
r8 0xffffffff8214b4ef kprintf+0x16f
r9 0x1
r10 0x25
r11 0xaf30e73c0c60586d
r12 0
r13 0
r14 0xffff800020ace780
r15 0
rip 0xffffffff818e93f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020b97590
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=506000 stat=onproc
flags process=2<EXEC> proc=0
pri=76, usrpri=76, nice=20
forw=0xffffffffffffffff, list=0xffff800020acf3d8,0xffff800020acf8d8
process=0xffff800020aed548 user=0xffff800020b92000, vmspace=0xfffffd807f007730
estcpu=26, cpticks=1, pctcpu=0.10
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
6701 197907 76965 0 2 0 syz-executor.1
75255 261386 78440 0 3 0x2 biowait syz-executor.0
75581 349589 0 0 3 0x14200 bored sosplice
*76965 506000 78440 0 7 0x2 syz-executor.1
78440 247560 57699 0 3 0x82 thrsleep syz-fuzzer
78440 377429 57699 0 3 0x4000082 nanosleep syz-fuzzer
78440 228197 57699 0 3 0x4000082 thrsleep syz-fuzzer
78440 127959 57699 0 3 0x4000082 thrsleep syz-fuzzer
78440 111085 57699 0 3 0x4000082 thrsleep syz-fuzzer
78440 94840 57699 0 3 0x4000082 thrsleep syz-fuzzer
78440 130518 57699 0 3 0x4000082 thrsleep syz-fuzzer
78440 419929 57699 0 3 0x4000082 thrsleep syz-fuzzer
78440 218736 57699 0 3 0x4000082 kqread syz-fuzzer
78440 441981 57699 0 3 0x4000082 nanosleep syz-fuzzer
57699 368816 25650 0 3 0x10008a pause ksh
25650 118150 70520 0 2 0x12 sshd
23847 462137 1 0 3 0x100083 ttyin getty
70520 360163 1 0 3 0x80 select sshd
23833 381710 19443 74 3 0x100092 bpf pflogd
19443 75182 1 0 3 0x80 netio pflogd
12541 143774 81600 73 3 0x100090 kqread syslogd
81600 183620 1 0 3 0x100082 netio syslogd
71563 430601 1 77 3 0x100090 poll dhclient
94938 204691 1 0 3 0x80 poll dhclient
84267 416878 0 0 3 0x14200 pgzero zerothread
53224 455176 0 0 3 0x14200 aiodoned aiodoned
42642 264518 0 0 3 0x14200 syncer update
90640 58836 0 0 3 0x14200 cleaner cleaner
27727 255159 0 0 3 0x14200 reaper reaper
64952 277218 0 0 3 0x14200 pgdaemon pagedaemon
2913 176852 0 0 3 0x14200 bored crynlk
14743 470900 0 0 3 0x14200 bored crypto
45526 387712 0 0 3 0x40014200 acpi0 acpi0
64321 435507 0 0 3 0x40014200 idle1
11775 244819 0 0 7 0x14200 softnet
19520 282544 0 0 3 0x14200 bored systqmp
22733 314612 0 0 3 0x14200 bored systq
87115 149520 0 0 3 0x40014200 bored softclock
63993 450130 0 0 3 0x40014200 idle0
36698 35193 0 0 3 0x14200 bored smr
1 447755 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82628ee8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_getpages+0xd2c sys/uvm/uvm_pmemrange.c:1051
#4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:366
#6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7 fork1+0x295 sys/kern/kern_fork.c:366
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 75255 (syz-executor.0) thread 0xffff800020acf650 (261386)
exclusive rrwlock inode r = 0 (0xfffffd80664dbe70)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80664dbd60)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 76965 (syz-executor.1) thread 0xffff800020ace780 (506000)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82648518)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82628ee8)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_getpages+0xd2c sys/uvm/uvm_pmemrange.c:1051
#4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:366
#6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7 fork1+0x295 sys/kern/kern_fork.c:366
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 11775 (softnet) thread 0xffff800020a204f0 (244819)
shared rwlock netlock r = 0 (0xffffffff82499b18)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 if_input_process+0x84 sys/net/if.c:942
#2 ifiq_process+0x80 sys/net/ifq.c:607
#3 taskq_thread+0x9c sys/kern/kern_task.c:369
#4 proc_trampoline+0x1c
shared rwlock softnet r = 0 (0xffff8000000230e0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 taskq_thread+0x8f sys/kern/kern_task.c:368
#2 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9532 6484K 7580K 78643K 12370 0
pcb 13 8K 8K 78643K 378 0
rtable 117 13K 13K 78643K 396 0
ifaddr 79 15K 15K 78643K 143 0
counters 39 33K 33K 78643K 39 0
ioctlops 0 0K 4K 78643K 1506 0
iov 0 0K 16K 78643K 159 0
mount 1 1K 1K 78643K 1 0
vnodes 1231 77K 78K 78643K 1709 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 6 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 88 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 564 0
sigio 0 0K 0K 78643K 12 0
proc 61 63K 83K 78643K 501 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 25 0
in_multi 58 3K 3K 78643K 100 0
ether_multi 1 0K 0K 78643K 6 0
mrt 0 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 72 318K 318K 78643K 72 0
exec 0 0K 1K 78643K 252 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 124 55K 57K 78643K 2687 0
UVM aobj 22 2K 2K 78643K 22 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 522 0
NDP 13 0K 0K 78643K 30 0
temp 144 3035K 3111K 78643K 26240 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 75 0 73 1 0 1 1 0 8 0
rtentry 112 69 0 25 2 0 2 2 0 8 0
unpcb 120 449 0 439 3 2 1 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 931 0 931 1 1 0 1 0 8 0
tcpcb 544 387 0 383 1 0 1 1 0 8 0
inpcb 280 1329 0 1322 3 1 2 2 0 8 1
rttmr 72 39 0 38 1 0 1 1 0 8 0
nd6 48 9 0 6 1 0 1 1 0 8 0
ppxss 1128 8 0 8 2 1 1 1 0 8 1
pffrag 232 14 0 14 2 1 1 1 0 482 1
pffrnode 88 14 0 14 2 1 1 1 0 8 1
pffrent 40 290 0 290 2 1 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 52 0 9 1 0 1 1 0 8 0
pfstkey 112 52 0 9 2 0 2 2 0 8 0
pfstate 328 52 0 9 4 0 4 4 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 384 0 154 16 0 16 16 0 8 0
art_table 32 386 0 154 3 0 3 3 0 8 1
art_node 16 68 0 27 1 0 1 1 0 8 0
sysvmsgpl 40 35 0 12 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 86 0 76 1 0 1 1 0 8 0
shmpl 112 20 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 2184 0 779 46 0 46 46 0 8 0
ffsino 272 2184 0 779 95 0 95 95 0 8 0
nchpl 144 3194 0 1584 61 0 61 61 0 8 0
uvmvnodes 72 2638 0 0 48 0 48 48 0 8 0
vnodes 208 2638 0 0 139 0 139 139 0 8 0
namei 1024 9425 0 9424 2 1 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
vcpupl 1984 4 0 0 1 0 1 1 0 8 0
vmpool 560 8 0 4 1 0 1 1 0 8 0
scxspl 192 9403 0 9401 9 6 3 6 0 8 2
plimitpl 152 46 0 38 1 0 1 1 0 8 0
sigapl 432 760 0 745 3 1 2 3 0 8 0
futexpl 56 11628 0 11628 1 0 1 1 0 8 1
knotepl 112 93 0 74 1 0 1 1 0 8 0
kqueuepl 104 66 0 64 1 0 1 1 0 8 0
pipepl 160 450 0 431 2 0 2 2 0 8 1
fdescpl 488 761 0 745 3 0 3 3 0 8 0
filepl 152 5639 0 5539 8 2 6 6 0 8 2
lockfpl 104 128 0 127 1 0 1 1 0 8 0
lockfspl 48 47 0 46 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 29 0 18 1 0 1 1 0 8 0
ucredpl 96 502 0 493 1 0 1 1 0 8 0
zombiepl 144 745 0 745 2 1 1 1 0 8 1
processpl 904 777 0 745 4 0 4 4 0 8 0
procpl 632 1847 0 1806 6 1 5 5 0 8 1
srpgc 64 2 0 2 1 1 0 1 0 8 0
sosppl 128 4 0 4 2 1 1 1 0 8 1
sockpl 384 1865 0 1846 9 4 5 6 0 8 3
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 11 0 0 2 0 2 2 0 8 0
mcl4k 4096 8 0 0 1 0 1 1 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 200 0 0 24 0 24 24 0 8 0
mtagpl 80 23 0 0 1 0 1 1 0 8 0
mbufpl 256 327 0 0 20 0 20 20 0 8 0
bufpl 280 7718 0 1346 456 0 456 456 0 8 0
anonpl 16 85584 0 65686 96 4 92 95 0 125 11
amapchunkpl 152 4204 0 4049 14 1 13 13 0 158 6
amappl16 192 3657 0 2574 66 8 58 65 0 8 3
amappl15 184 60 0 56 1 0 1 1 0 8 0
amappl14 176 37 0 34 1 0 1 1 0 8 0
amappl13 168 57 0 56 2 1 1 1 0 8 0
amappl12 160 301 0 299 1 0 1 1 0 8 0
amappl11 152 58 0 42 1 0 1 1 0 8 0
amappl10 144 195 0 186 1 0 1 1 0 8 0
amappl9 136 622 0 618 1 0 1 1 0 8 0
amappl8 128 145 0 119 1 0 1 1 0 8 0
amappl7 120 280 0 268 1 0 1 1 0 8 0
amappl6 112 59 0 52 1 0 1 1 0 8 0
amappl5 104 429 0 416 1 0 1 1 0 8 0
amappl4 96 1076 0 1045 2 1 1 2 0 8 0
amappl3 88 129 0 121 1 0 1 1 0 8 0
amappl2 80 5138 0 5070 3 1 2 3 0 8 0
amappl1 72 25721 0 25283 27 17 10 21 0 8 0
amappl 80 2119 0 2072 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 21 0 0 1 0 1 1 0 8 0
uaddrrnd 24 769 0 749 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 769 0 749 1 0 1 1 0 8 0
vmmpekpl 168 9065 0 9030 2 0 2 2 0 8 0
vmmpepl 168 100124 0 97879 164 24 140 140 0 357 40
vmsppl 368 768 0 749 2 0 2 2 0 8 0
pdppl 4096 1545 0 1502 7 1 6 6 0 8 0
pvpl 32 262791 0 239772 220 3 217 220 0 265 29
pmappl 232 768 0 749 3 1 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 185 0 5 6 0 6 6 0 8 0