panic: apcaquniirci: ng bkloerckneabll de i a g n o st ic a s s er ti o n " ! _ ke r n e l_ l oc k _ h sel
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syzbot
Mar 23, 2022, 3:20:20 AM3/23/22
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: bf088e2b2bca Extract the type from the ICMP6 header before..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=153574fb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0af0c842c817ae90d782
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0af0c8...@syzkaller.appspotmail.com
panic: apcaquniirci: ng bkloerckneabll de i a g n o st ic a s s er ti o n " ! _ ke r n e l_ l oc k _ h selleedp( )" f a i l ed : f i l e " / s y z k a llolcekr / wmaitnha g e r s / m u l t ic o r e/ k e r n e l / s y s /supvmin/ulvocm_k mora p. c c"r,i t liicnael 2 7 3 s4e
ctStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
226463 10548 0 0 0x4000000 1 syz-executor.3
*173119 55646 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258c085) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8260257e,ffffffff8260f998,aae,ffffffff825bfe73) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_map_teardown(fffffd8074d19180) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2736
uvmspace_free(fffffd8074d19180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457
end trace frame: 0x0, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
cpu0: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_map.c", line 2734
*cpu1: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258c085) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8260257e,ffffffff8260f998,aae,ffffffff825bfe73) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_map_teardown(fffffd8074d19180) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2736
uvmspace_free(fffffd8074d19180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457
end trace frame: 0x0, count: -6
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800021135a90
rbx 0xffffffff82987bff cpu_info_full_primary+0x2bff
rdx 0
rcx 0
rax 0xffff8000210f9a40
r8 0x101010101010101
r9 0x8080808080808080
r10 0x50489d8f0dadfbfe
r11 0xddaa8058119fae66
r12 0xffffffff82987a00 cpu_info_full_primary+0x2a00
r13 0
r14 0xffff800020ce9a00
r15 0x1
rip 0xffffffff815a2d98 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021135a80
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (reaper) pid=173119 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=52, nice=20
forw=0xffffffffffffffff, list=0xffff8000210f97a0,0xffff8000210f9cf0
process=0xffff8000ffffe990 user=0xffff800021130000, vmspace=0xffffffff82b84d18
estcpu=2, cpticks=8, pctcpu=1.4
user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
10548 360236 53290 0 2 0 syz-executor.3
10548 226463 53290 0 7 0x4000000 syz-executor.3
10548 192647 53290 0 3 0x4000080 fsleep syz-executor.3
10548 158292 53290 0 3 0x4000080 fsleep syz-executor.3
62193 334328 79494 0 2 0 syz-executor.6
62193 187119 79494 0 3 0x4000080 fifor syz-executor.6
62193 330293 79494 0 2 0x4000000 syz-executor.6
95895 399648 39558 0 2 0 syz-executor.5
95895 238432 39558 0 2 0x4000000 syz-executor.5
56712 49633 8536 0 3 0x2 biowait syz-executor.0
23730 510316 0 0 3 0x14280 nfsidl nfsio
80397 492585 0 0 3 0x14280 nfsidl nfsio
86741 518958 0 0 3 0x14280 nfsidl nfsio
59535 43383 0 0 3 0x14280 nfsidl nfsio
34480 521584 0 0 3 0x14280 nfsidl nfsio
66298 212493 0 0 3 0x14280 nfsidl nfsio
48408 419189 0 0 3 0x14280 nfsidl nfsio
88876 188785 0 0 3 0x14280 nfsidl nfsio
48248 184093 0 0 3 0x14280 nfsidl nfsio
37626 35516 0 0 3 0x14280 nfsidl nfsio
85622 171836 0 0 3 0x14280 nfsidl nfsio
90391 380100 0 0 3 0x14280 nfsidl nfsio
24965 457189 0 0 3 0x14280 nfsidl nfsio
54499 127302 0 0 3 0x14280 nfsidl nfsio
44428 464954 0 0 3 0x14280 nfsidl nfsio
99375 366040 0 0 3 0x14280 nfsidl nfsio
56619 92809 0 0 3 0x14280 nfsidl nfsio
16485 12409 0 0 3 0x14280 nfsidl nfsio
39409 62565 0 0 3 0x14280 nfsidl nfsio
77750 257881 0 0 3 0x14280 nfsidl nfsio
37306 458273 0 0 3 0x14200 bored sosplice
40856 148381 8536 0 3 0x82 nanoslp syz-executor.4
40078 433500 8536 0 3 0x82 nanoslp syz-executor.7
79494 503248 8536 0 3 0x82 nanoslp syz-executor.6
39558 356931 8536 0 3 0x82 nanoslp syz-executor.5
53290 479903 8536 0 3 0x82 nanoslp syz-executor.3
21721 395678 8536 0 2 0x2 syz-executor.2
60006 237829 8536 0 3 0x2 biowait syz-executor.1
8536 385010 11535 0 3 0x82 kqread syz-fuzzer
8536 42018 11535 0 3 0x4000082 nanoslp syz-fuzzer
8536 179699 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 202005 11535 0 3 0x4000082 nanoslp syz-fuzzer
8536 232611 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 27327 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 269504 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 453735 11535 0 3 0x4000082 thrsleep syz-fuzzer
11535 129647 41149 0 3 0x10008a sigsusp ksh
41149 375089 85383 0 3 0x9a kqread sshd
94951 54517 1 0 3 0x100083 ttyin getty
85383 388313 1 0 3 0x88 kqread sshd
97654 389897 46044 74 3 0x1100092 bpf pflogd
46044 283592 1 0 3 0x80 netio pflogd
10641 371060 84729 73 3 0x1100090 kqread syslogd
84729 436642 1 0 3 0x100082 netio syslogd
47658 160742 1 0 3 0x100080 kqread resolvd
20447 363968 61636 77 3 0x100092 kqread dhcpleased
74071 387193 61636 77 3 0x100092 kqread dhcpleased
61636 396776 1 0 3 0x80 kqread dhcpleased
64536 269590 0 0 3 0x14200 bored smr
82297 67166 0 0 2 0x14200 zerothread
46379 466242 0 0 3 0x14200 aiodoned aiodoned
87629 505425 0 0 3 0x14200 syncer update
78281 148023 0 0 3 0x14200 cleaner cleaner
*55646 173119 0 0 7 0x14200 reaper
28338 329234 0 0 3 0x14200 pgdaemon pagedaemon
71306 504678 0 0 3 0x14200 bored viomb
44226 14532 0 0 3 0x40014200 acpi0 acpi0
16731 222632 0 0 3 0x40014200 idle1
23323 113970 0 0 3 0x14200 bored softnet
3298 165129 0 0 3 0x14200 bored systqmp
19661 373833 0 0 3 0x14200 bored systq
90228 36921 0 0 3 0x40014200 bored softclock
77541 51662 0 0 3 0x40014200 idle0
1 118321 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 (0xffffffff82b87938)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_freepageq+0xcc sys/uvm/uvm_pmemrange.c:1333
#4 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523
#5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599
#6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789
#7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
#8 reaper+0x18b sys/kern/kern_exit.c:457
#9 proc_trampoline+0x1c
CPU 1:
exclusive mutex &table->inpt_mtx r = 0 (0xffffffff82a21700)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 rip6_input+0x28f
#4 icmp6_input+0x8e8 sys/netinet6/icmp6.c:762
#5 ip_deliver+0x322 sys/netinet/ip_input.c:657
#6 ip6_input_if+0x920
#7 ipv6_input+0x48 sys/netinet6/ip6_input.c:169
#8 if_input_local+0x136 sys/net/if.c:778
#9 ip6_output+0xf57
#10 rip6_output+0x4ad sys/netinet6/raw_ip6.c:490
#11 rip6_usrreq+0x5d3 sys/netinet6/raw_ip6.c:679
#12 sosend+0x632 sys/kern/uipc_socket.c:582
#13 dofilewritev+0x19c sys/kern/sys_generic.c:381
#14 sys_write+0x83 sys/kern/sys_generic.c:301
#15 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#15 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#16 Xsyscall+0x128
Process 10548 (syz-executor.3) thread 0xffff8000ffff5260 (226463)
exclusive rwlock netlock r = 0 (0xffffffff829bbd70)
#0 witness_lock+0x44d
#1 solock+0x86 sys/kern/uipc_socket2.c:295
#2 sosend+0x517 sys/kern/uipc_socket.c:570
#3 dofilewritev+0x19c sys/kern/sys_generic.c:381
#4 sys_write+0x83 sys/kern/sys_generic.c:301
#5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#6 Xsyscall+0x128
Process 56712 (syz-executor.0) thread 0xffff8000246b5cf0 (49633)
exclusive rrwlock inode r = 0 (0xfffffd806654c1b8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
#9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101
#10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8067c513c8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6 namei+0x36a sys/kern/vfs_lookup.c:245
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
Process 60006 (syz-executor.1) thread 0xffff8000ffff4fc0 (237829)
exclusive rrwlock inode r = 0 (0xfffffd806654ca38)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vget+0x1d3 sys/kern/vfs_subr.c:677
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318
#8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561
#11 namei+0x36a sys/kern/vfs_lookup.c:245
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850
#13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d452a38)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6 namei+0x36a sys/kern/vfs_lookup.c:245
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
Process 55646 (reaper) thread 0xffff8000210f9a40 (173119)
uvm_fault(0xffffffff82b84d18, 0x1, 0, 1) -> e
kernel: page fault trap, code=0
Faulted in DDB; continuing...
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10183 6482K 6677K 78643K 11576 0
pcb 79 12K 12K 78643K 206 0
rtable 245 8K 8K 78643K 429 0
ifaddr 87 18K 18K 78643K 124 0
counters 56 35K 35K 78643K 68 0
ioctlops 0 0K 4K 78643K 1501 0
iov 0 0K 0K 78643K 4 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1337 83K 84K 78643K 1489 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 7 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 27 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 13 45K 82K 78643K 451 0
sigio 0 0K 0K 78643K 4 0
proc 69 87K 124K 78643K 538 0
subproc 104 6K 6K 78643K 117 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 1 0K 0K 78643K 36 0
in_multi 101 6K 7K 78643K 132 0
ether_multi 2 0K 0K 78643K 12 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 79 360K 360K 78643K 79 0
exec 0 0K 2K 78643K 676 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 7 26K 26K 78643K 7 0
UVM amap 297 82K 87K 78643K 7322 0
UVM aobj 12 2K 2K 78643K 16 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 2 0K 0K 78643K 15 0
NDP 12 0K 2K 78643K 36 0
temp 131 4713K 4777K 78643K 7197 0
kqueue 12 18K 22K 78643K 44 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
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 36 0 33 1 0 1 1 0 8 0
rtentry 112 140 0 29 4 0 4 4 0 8 0
unpcb 136 304 0 287 7 6 1 6 0 8 0
syncache 296 8 0 8 2 2 0 1 0 8 0
tcpqe 32 183 0 183 1 1 0 1 0 8 0
tcpcb 736 201 0 121 12 4 8 8 0 8 0
arp 120 25 0 7 1 0 1 1 0 8 0
inpcb 312 613 0 473 16 5 11 11 0 8 0
nd6 48 28 0 3 1 0 1 1 0 8 0
kcovpl 48 9 0 1 1 0 1 1 0 8 0
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 2 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
pfrktable 1344 4 0 2 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 264 2 0 2 1 1 0 1 0 8 0
pfstitem 24 27 0 11 1 0 1 1 0 8 0
pfstkey 112 27 0 11 1 0 1 1 0 8 0
pfstate 320 27 0 11 2 0 2 2 0 8 0
pfrule 1360 24 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 518 0 57 29 0 29 29 0 8 0
art_table 32 519 0 57 4 0 4 4 0 8 0
art_node 16 139 0 38 1 0 1 1 0 8 0
semapl 112 25 0 15 1 0 1 1 0 8 0
shmpl 112 13 0 4 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1914 0 473 91 0 91 91 0 8 0
ffsino 272 1914 0 473 97 0 97 97 0 8 0
nchpl 144 2597 0 967 63 0 63 63 0 8 0
uvmvnodes 80 2173 0 0 45 0 45 45 0 8 0
vnodes 224 2173 0 0 128 0 128 128 0 8 0
namei 1024 9150 0 9149 3 2 1 2 0 8 0
percpumem 16 46 0 6 1 0 1 1 0 8 0
pfiaddrpl 120 3 0 0 1 0 1 1 0 8 0
scxspl 216 7861 0 7859 9 8 1 8 0 8 0
plimitpl 152 41 0 26 1 0 1 1 0 8 0
sigapl 424 773 0 710 8 0 8 8 0 8 0
futexpl 64 2602 0 2600 1 0 1 1 0 8 0
knotepl 120 230 0 0 7 0 7 7 0 8 0
kqueuepl 216 146 0 138 7 2 5 5 0 8 4
pipepl 336 145 0 117 3 0 3 3 0 8 0
fdescpl 496 738 0 712 5 1 4 5 0 8 0
filepl 152 3866 0 3496 20 3 17 17 0 8 2
lockfpl 104 8 0 6 1 0 1 1 0 8 0
lockfspl 48 5 0 3 1 0 1 1 0 8 0
sessionpl 144 25 0 8 1 0 1 1 0 8 0
pgrppl 48 25 0 8 1 0 1 1 0 8 0
ucredpl 96 455 0 440 1 0 1 1 0 8 0
zombiepl 144 712 0 710 1 0 1 1 0 8 0
processpl 1064 773 0 710 5 0 5 5 0 8 0
procpl 672 1432 0 1355 9 1 8 8 0 8 0
sosppl 168 6 0 6 1 1 0 1 0 8 0
sockpl 480 953 0 796 31 11 20 21 0 8 0
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 9 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 191 0 0 23 0 23 23 0 8 0
mtagpl 96 10 0 0 1 0 1 1 0 8 0
mbufpl 256 242 0 0 15 0 15 15 0 8 0
bufpl 288 4087 0 145 282 0 282 282 0 8 0
anonpl 24 159714 0 143269 119 7 112 113 0 186 0
amapchunkpl 152 16896 0 16094 41 5 36 37 0 158 1
amappl16 200 1413 0 877 30 1 29 29 0 8 0
amappl15 192 101 0 93 1 0 1 1 0 8 0
amappl14 184 27 0 22 1 0 1 1 0 8 0
amappl13 176 161 0 156 1 0 1 1 0 8 0
amappl12 168 56 0 55 1 0 1 1 0 8 0
amappl11 160 112 0 95 1 0 1 1 0 8 0
amappl10 152 41 0 36 1 0 1 1 0 8 0
amappl9 144 569 0 564 1 0 1 1 0 8 0
amappl8 136 670 0 623 2 0 2 2 0 8 0
amappl7 128 200 0 187 1 0 1 1 0 8 0
amappl6 120 296 0 271 2 1 1 2 0 8 0
amappl5 112 381 0 366 1 0 1 1 0 8 0
amappl4 104 982 0 952 2 1 1 2 0 8 0
amappl3 96 289 0 272 1 0 1 1 0 8 0
amappl2 88 667 0 621 3 1 2 3 0 8 0
amappl1 80 16538 0 15980 19 6 13 19 0 8 0
amappl 88 6864 0 6628 7 0 7 7 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 15 0 4 1 0 1 1 0 8 0
uaddrrnd 24 738 0 711 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 738 0 711 1 0 1 1 0 8 0
vmmpekpl 168 10519 0 10463 3 0 3 3 0 8 0
vmmpepl 168 71643 0 69313 177 24 153 177 0 357 40
vmsppl 368 737 0 711 4 1 3 4 0 8 0
rwobjpl 56 20274 0 16594 53 0 53 53 0 8 0
pdppl 4096 1483 0 1422 114 47 67 79 0 8 6
pvpl 32 403515 0 383040 251 32 219 250 0 265 38
pmappl 248 737 0 711 3 1 2 3 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 703 0 62 19 0 19 19 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258c085) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8260257e,ffffffff8260f998,aae,ffffffff825bfe73) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_map_teardown(fffffd8074d19180) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2736
uvmspace_free(fffffd8074d19180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457
end trace frame: 0x0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,74) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,74) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,74) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(74) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(74) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff82605424) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff825a4184) at panic+0xd7 sys/kern/subr_prf.c:220
witness_checkorder(ffffffff82a6f1a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 sys/kern/kern_lock.c:142
selwakeup(fffffd80697c44f0) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline]
selwakeup(fffffd80697c44f0) at selwakeup+0x16 sys/kern/sys_generic.c:885
sorwakeup(fffffd80697c43d8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699
end trace frame: 0xffff80002e4067a0, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,74) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,74) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,74) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(74) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(74) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff82605424) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff825a4184) at panic+0xd7 sys/kern/subr_prf.c:220
witness_checkorder(ffffffff82a6f1a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 sys/kern/kern_lock.c:142
selwakeup(fffffd80697c44f0) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline]
selwakeup(fffffd80697c44f0) at selwakeup+0x16 sys/kern/sys_generic.c:885
sorwakeup(fffffd80697c43d8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699
rip6_input(ffff80002e406aa8,ffff80002e406ab4,3a,18) at rip6_input+0x6bc sys/netinet6/raw_ip6.c:224
icmp6_input(ffff80002e406aa8,ffff80002e406ab4,3a,18) at icmp6_input+0x8e8 sys/netinet6/icmp6.c:762
ip_deliver(ffff80002e406aa8,ffff80002e406ab4,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:657
ip6_input_if(ffff80002e406aa8,ffff80002e406ab4,29,0,ffff80000019f2a8) at ip6_input_if+0x920
ipv6_input(ffff80000019f2a8,fffffd806c14cc00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:169
if_input_local(ffff80000019f2a8,fffffd806c14cc00,18) at if_input_local+0x136 sys/net/if.c:778
ip6_output(fffffd806c442600,ffff800000c0f400,fffffd8068db3900,0,0,fffffd8068db3888) at ip6_output+0xf57
rip6_output(fffffd8074b97800,fffffd8066bb6d40,ffff80002e406e10,0) at rip6_output+0x4ad sys/netinet6/raw_ip6.c:490
rip6_usrreq(fffffd8066bb6d40,9,fffffd8074b97800,0,0,ffff8000ffff5260) at rip6_usrreq+0x5d3 sys/netinet6/raw_ip6.c:679
sosend(fffffd8066bb6d40,0,ffff80002e407048,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582
dofilewritev(ffff8000ffff5260,4,ffff80002e407048,0,ffff80002e407140) at dofilewritev+0x19c sys/kern/sys_generic.c:381
sys_write(ffff8000ffff5260,ffff80002e4070e8,ffff80002e407140) at sys_write+0x83 sys/kern/sys_generic.c:301
syscall(ffff80002e4071b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002e4071b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7105f59f460, count: -28
---
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: bf088e2b2bca Extract the type from the ICMP6 header before..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=153574fb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0af0c842c817ae90d782
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0af0c8...@syzkaller.appspotmail.com
panic: apcaquniirci: ng bkloerckneabll de i a g n o st ic a s s er ti o n " ! _ ke r n e l_ l oc k _ h selleedp( )" f a i l ed : f i l e " / s y z k a llolcekr / wmaitnha g e r s / m u l t ic o r e/ k e r n e l / s y s /supvmin/ulvocm_k mora p. c c"r,i t liicnael 2 7 3 s4e
ctStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
226463 10548 0 0 0x4000000 1 syz-executor.3
*173119 55646 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258c085) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8260257e,ffffffff8260f998,aae,ffffffff825bfe73) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_map_teardown(fffffd8074d19180) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2736
uvmspace_free(fffffd8074d19180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457
end trace frame: 0x0, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
cpu0: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_map.c", line 2734
*cpu1: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258c085) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8260257e,ffffffff8260f998,aae,ffffffff825bfe73) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_map_teardown(fffffd8074d19180) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2736
uvmspace_free(fffffd8074d19180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457
end trace frame: 0x0, count: -6
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800021135a90
rbx 0xffffffff82987bff cpu_info_full_primary+0x2bff
rdx 0
rcx 0
rax 0xffff8000210f9a40
r8 0x101010101010101
r9 0x8080808080808080
r10 0x50489d8f0dadfbfe
r11 0xddaa8058119fae66
r12 0xffffffff82987a00 cpu_info_full_primary+0x2a00
r13 0
r14 0xffff800020ce9a00
r15 0x1
rip 0xffffffff815a2d98 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021135a80
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (reaper) pid=173119 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=52, nice=20
forw=0xffffffffffffffff, list=0xffff8000210f97a0,0xffff8000210f9cf0
process=0xffff8000ffffe990 user=0xffff800021130000, vmspace=0xffffffff82b84d18
estcpu=2, cpticks=8, pctcpu=1.4
user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
10548 360236 53290 0 2 0 syz-executor.3
10548 226463 53290 0 7 0x4000000 syz-executor.3
10548 192647 53290 0 3 0x4000080 fsleep syz-executor.3
10548 158292 53290 0 3 0x4000080 fsleep syz-executor.3
62193 334328 79494 0 2 0 syz-executor.6
62193 187119 79494 0 3 0x4000080 fifor syz-executor.6
62193 330293 79494 0 2 0x4000000 syz-executor.6
95895 399648 39558 0 2 0 syz-executor.5
95895 238432 39558 0 2 0x4000000 syz-executor.5
56712 49633 8536 0 3 0x2 biowait syz-executor.0
23730 510316 0 0 3 0x14280 nfsidl nfsio
80397 492585 0 0 3 0x14280 nfsidl nfsio
86741 518958 0 0 3 0x14280 nfsidl nfsio
59535 43383 0 0 3 0x14280 nfsidl nfsio
34480 521584 0 0 3 0x14280 nfsidl nfsio
66298 212493 0 0 3 0x14280 nfsidl nfsio
48408 419189 0 0 3 0x14280 nfsidl nfsio
88876 188785 0 0 3 0x14280 nfsidl nfsio
48248 184093 0 0 3 0x14280 nfsidl nfsio
37626 35516 0 0 3 0x14280 nfsidl nfsio
85622 171836 0 0 3 0x14280 nfsidl nfsio
90391 380100 0 0 3 0x14280 nfsidl nfsio
24965 457189 0 0 3 0x14280 nfsidl nfsio
54499 127302 0 0 3 0x14280 nfsidl nfsio
44428 464954 0 0 3 0x14280 nfsidl nfsio
99375 366040 0 0 3 0x14280 nfsidl nfsio
56619 92809 0 0 3 0x14280 nfsidl nfsio
16485 12409 0 0 3 0x14280 nfsidl nfsio
39409 62565 0 0 3 0x14280 nfsidl nfsio
77750 257881 0 0 3 0x14280 nfsidl nfsio
37306 458273 0 0 3 0x14200 bored sosplice
40856 148381 8536 0 3 0x82 nanoslp syz-executor.4
40078 433500 8536 0 3 0x82 nanoslp syz-executor.7
79494 503248 8536 0 3 0x82 nanoslp syz-executor.6
39558 356931 8536 0 3 0x82 nanoslp syz-executor.5
53290 479903 8536 0 3 0x82 nanoslp syz-executor.3
21721 395678 8536 0 2 0x2 syz-executor.2
60006 237829 8536 0 3 0x2 biowait syz-executor.1
8536 385010 11535 0 3 0x82 kqread syz-fuzzer
8536 42018 11535 0 3 0x4000082 nanoslp syz-fuzzer
8536 179699 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 202005 11535 0 3 0x4000082 nanoslp syz-fuzzer
8536 232611 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 27327 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 269504 11535 0 3 0x4000082 thrsleep syz-fuzzer
8536 453735 11535 0 3 0x4000082 thrsleep syz-fuzzer
11535 129647 41149 0 3 0x10008a sigsusp ksh
41149 375089 85383 0 3 0x9a kqread sshd
94951 54517 1 0 3 0x100083 ttyin getty
85383 388313 1 0 3 0x88 kqread sshd
97654 389897 46044 74 3 0x1100092 bpf pflogd
46044 283592 1 0 3 0x80 netio pflogd
10641 371060 84729 73 3 0x1100090 kqread syslogd
84729 436642 1 0 3 0x100082 netio syslogd
47658 160742 1 0 3 0x100080 kqread resolvd
20447 363968 61636 77 3 0x100092 kqread dhcpleased
74071 387193 61636 77 3 0x100092 kqread dhcpleased
61636 396776 1 0 3 0x80 kqread dhcpleased
64536 269590 0 0 3 0x14200 bored smr
82297 67166 0 0 2 0x14200 zerothread
46379 466242 0 0 3 0x14200 aiodoned aiodoned
87629 505425 0 0 3 0x14200 syncer update
78281 148023 0 0 3 0x14200 cleaner cleaner
*55646 173119 0 0 7 0x14200 reaper
28338 329234 0 0 3 0x14200 pgdaemon pagedaemon
71306 504678 0 0 3 0x14200 bored viomb
44226 14532 0 0 3 0x40014200 acpi0 acpi0
16731 222632 0 0 3 0x40014200 idle1
23323 113970 0 0 3 0x14200 bored softnet
3298 165129 0 0 3 0x14200 bored systqmp
19661 373833 0 0 3 0x14200 bored systq
90228 36921 0 0 3 0x40014200 bored softclock
77541 51662 0 0 3 0x40014200 idle0
1 118321 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 (0xffffffff82b87938)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_freepageq+0xcc sys/uvm/uvm_pmemrange.c:1333
#4 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523
#5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599
#6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789
#7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
#8 reaper+0x18b sys/kern/kern_exit.c:457
#9 proc_trampoline+0x1c
CPU 1:
exclusive mutex &table->inpt_mtx r = 0 (0xffffffff82a21700)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 rip6_input+0x28f
#4 icmp6_input+0x8e8 sys/netinet6/icmp6.c:762
#5 ip_deliver+0x322 sys/netinet/ip_input.c:657
#6 ip6_input_if+0x920
#7 ipv6_input+0x48 sys/netinet6/ip6_input.c:169
#8 if_input_local+0x136 sys/net/if.c:778
#9 ip6_output+0xf57
#10 rip6_output+0x4ad sys/netinet6/raw_ip6.c:490
#11 rip6_usrreq+0x5d3 sys/netinet6/raw_ip6.c:679
#12 sosend+0x632 sys/kern/uipc_socket.c:582
#13 dofilewritev+0x19c sys/kern/sys_generic.c:381
#14 sys_write+0x83 sys/kern/sys_generic.c:301
#15 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#15 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#16 Xsyscall+0x128
Process 10548 (syz-executor.3) thread 0xffff8000ffff5260 (226463)
exclusive rwlock netlock r = 0 (0xffffffff829bbd70)
#0 witness_lock+0x44d
#1 solock+0x86 sys/kern/uipc_socket2.c:295
#2 sosend+0x517 sys/kern/uipc_socket.c:570
#3 dofilewritev+0x19c sys/kern/sys_generic.c:381
#4 sys_write+0x83 sys/kern/sys_generic.c:301
#5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#6 Xsyscall+0x128
Process 56712 (syz-executor.0) thread 0xffff8000246b5cf0 (49633)
exclusive rrwlock inode r = 0 (0xfffffd806654c1b8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404
#9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101
#10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8067c513c8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6 namei+0x36a sys/kern/vfs_lookup.c:245
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
Process 60006 (syz-executor.1) thread 0xffff8000ffff4fc0 (237829)
exclusive rrwlock inode r = 0 (0xfffffd806654ca38)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vget+0x1d3 sys/kern/vfs_subr.c:677
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318
#8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561
#11 namei+0x36a sys/kern/vfs_lookup.c:245
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850
#13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d452a38)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6 namei+0x36a sys/kern/vfs_lookup.c:245
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850
#8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9 Xsyscall+0x128
Process 55646 (reaper) thread 0xffff8000210f9a40 (173119)
uvm_fault(0xffffffff82b84d18, 0x1, 0, 1) -> e
kernel: page fault trap, code=0
Faulted in DDB; continuing...
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10183 6482K 6677K 78643K 11576 0
pcb 79 12K 12K 78643K 206 0
rtable 245 8K 8K 78643K 429 0
ifaddr 87 18K 18K 78643K 124 0
counters 56 35K 35K 78643K 68 0
ioctlops 0 0K 4K 78643K 1501 0
iov 0 0K 0K 78643K 4 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1337 83K 84K 78643K 1489 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 7 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 27 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 13 45K 82K 78643K 451 0
sigio 0 0K 0K 78643K 4 0
proc 69 87K 124K 78643K 538 0
subproc 104 6K 6K 78643K 117 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 1 0K 0K 78643K 36 0
in_multi 101 6K 7K 78643K 132 0
ether_multi 2 0K 0K 78643K 12 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 79 360K 360K 78643K 79 0
exec 0 0K 2K 78643K 676 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 7 26K 26K 78643K 7 0
UVM amap 297 82K 87K 78643K 7322 0
UVM aobj 12 2K 2K 78643K 16 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 2 0K 0K 78643K 15 0
NDP 12 0K 2K 78643K 36 0
temp 131 4713K 4777K 78643K 7197 0
kqueue 12 18K 22K 78643K 44 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
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 36 0 33 1 0 1 1 0 8 0
rtentry 112 140 0 29 4 0 4 4 0 8 0
unpcb 136 304 0 287 7 6 1 6 0 8 0
syncache 296 8 0 8 2 2 0 1 0 8 0
tcpqe 32 183 0 183 1 1 0 1 0 8 0
tcpcb 736 201 0 121 12 4 8 8 0 8 0
arp 120 25 0 7 1 0 1 1 0 8 0
inpcb 312 613 0 473 16 5 11 11 0 8 0
nd6 48 28 0 3 1 0 1 1 0 8 0
kcovpl 48 9 0 1 1 0 1 1 0 8 0
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 2 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
pfrktable 1344 4 0 2 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 264 2 0 2 1 1 0 1 0 8 0
pfstitem 24 27 0 11 1 0 1 1 0 8 0
pfstkey 112 27 0 11 1 0 1 1 0 8 0
pfstate 320 27 0 11 2 0 2 2 0 8 0
pfrule 1360 24 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 518 0 57 29 0 29 29 0 8 0
art_table 32 519 0 57 4 0 4 4 0 8 0
art_node 16 139 0 38 1 0 1 1 0 8 0
semapl 112 25 0 15 1 0 1 1 0 8 0
shmpl 112 13 0 4 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1914 0 473 91 0 91 91 0 8 0
ffsino 272 1914 0 473 97 0 97 97 0 8 0
nchpl 144 2597 0 967 63 0 63 63 0 8 0
uvmvnodes 80 2173 0 0 45 0 45 45 0 8 0
vnodes 224 2173 0 0 128 0 128 128 0 8 0
namei 1024 9150 0 9149 3 2 1 2 0 8 0
percpumem 16 46 0 6 1 0 1 1 0 8 0
pfiaddrpl 120 3 0 0 1 0 1 1 0 8 0
scxspl 216 7861 0 7859 9 8 1 8 0 8 0
plimitpl 152 41 0 26 1 0 1 1 0 8 0
sigapl 424 773 0 710 8 0 8 8 0 8 0
futexpl 64 2602 0 2600 1 0 1 1 0 8 0
knotepl 120 230 0 0 7 0 7 7 0 8 0
kqueuepl 216 146 0 138 7 2 5 5 0 8 4
pipepl 336 145 0 117 3 0 3 3 0 8 0
fdescpl 496 738 0 712 5 1 4 5 0 8 0
filepl 152 3866 0 3496 20 3 17 17 0 8 2
lockfpl 104 8 0 6 1 0 1 1 0 8 0
lockfspl 48 5 0 3 1 0 1 1 0 8 0
sessionpl 144 25 0 8 1 0 1 1 0 8 0
pgrppl 48 25 0 8 1 0 1 1 0 8 0
ucredpl 96 455 0 440 1 0 1 1 0 8 0
zombiepl 144 712 0 710 1 0 1 1 0 8 0
processpl 1064 773 0 710 5 0 5 5 0 8 0
procpl 672 1432 0 1355 9 1 8 8 0 8 0
sosppl 168 6 0 6 1 1 0 1 0 8 0
sockpl 480 953 0 796 31 11 20 21 0 8 0
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 9 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 191 0 0 23 0 23 23 0 8 0
mtagpl 96 10 0 0 1 0 1 1 0 8 0
mbufpl 256 242 0 0 15 0 15 15 0 8 0
bufpl 288 4087 0 145 282 0 282 282 0 8 0
anonpl 24 159714 0 143269 119 7 112 113 0 186 0
amapchunkpl 152 16896 0 16094 41 5 36 37 0 158 1
amappl16 200 1413 0 877 30 1 29 29 0 8 0
amappl15 192 101 0 93 1 0 1 1 0 8 0
amappl14 184 27 0 22 1 0 1 1 0 8 0
amappl13 176 161 0 156 1 0 1 1 0 8 0
amappl12 168 56 0 55 1 0 1 1 0 8 0
amappl11 160 112 0 95 1 0 1 1 0 8 0
amappl10 152 41 0 36 1 0 1 1 0 8 0
amappl9 144 569 0 564 1 0 1 1 0 8 0
amappl8 136 670 0 623 2 0 2 2 0 8 0
amappl7 128 200 0 187 1 0 1 1 0 8 0
amappl6 120 296 0 271 2 1 1 2 0 8 0
amappl5 112 381 0 366 1 0 1 1 0 8 0
amappl4 104 982 0 952 2 1 1 2 0 8 0
amappl3 96 289 0 272 1 0 1 1 0 8 0
amappl2 88 667 0 621 3 1 2 3 0 8 0
amappl1 80 16538 0 15980 19 6 13 19 0 8 0
amappl 88 6864 0 6628 7 0 7 7 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 15 0 4 1 0 1 1 0 8 0
uaddrrnd 24 738 0 711 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 738 0 711 1 0 1 1 0 8 0
vmmpekpl 168 10519 0 10463 3 0 3 3 0 8 0
vmmpepl 168 71643 0 69313 177 24 153 177 0 357 40
vmsppl 368 737 0 711 4 1 3 4 0 8 0
rwobjpl 56 20274 0 16594 53 0 53 53 0 8 0
pdppl 4096 1483 0 1422 114 47 67 79 0 8 6
pvpl 32 403515 0 383040 251 32 219 250 0 265 38
pmappl 248 737 0 711 3 1 2 3 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 703 0 62 19 0 19 19 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258c085) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff8260257e,ffffffff8260f998,aae,ffffffff825bfe73) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_map_teardown(fffffd8074d19180) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2736
uvmspace_free(fffffd8074d19180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685
reaper(ffff8000210f9a40) at reaper+0x18b sys/kern/kern_exit.c:457
end trace frame: 0x0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,74) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,74) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,74) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(74) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(74) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff82605424) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff825a4184) at panic+0xd7 sys/kern/subr_prf.c:220
witness_checkorder(ffffffff82a6f1a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 sys/kern/kern_lock.c:142
selwakeup(fffffd80697c44f0) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline]
selwakeup(fffffd80697c44f0) at selwakeup+0x16 sys/kern/sys_generic.c:885
sorwakeup(fffffd80697c43d8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699
end trace frame: 0xffff80002e4067a0, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,74) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,74) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,74) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(74) at cnputc+0x4b sys/dev/cons.c:239
db_putchar(74) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068
db_printf(ffffffff82605424) at db_printf+0x85 sys/kern/subr_prf.c:502
panic(ffffffff825a4184) at panic+0xd7 sys/kern/subr_prf.c:220
witness_checkorder(ffffffff82a6f1a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline]
__mp_lock(ffffffff82a6ef98) at __mp_lock+0xa1 sys/kern/kern_lock.c:142
selwakeup(fffffd80697c44f0) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline]
selwakeup(fffffd80697c44f0) at selwakeup+0x16 sys/kern/sys_generic.c:885
sorwakeup(fffffd80697c43d8) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699
rip6_input(ffff80002e406aa8,ffff80002e406ab4,3a,18) at rip6_input+0x6bc sys/netinet6/raw_ip6.c:224
icmp6_input(ffff80002e406aa8,ffff80002e406ab4,3a,18) at icmp6_input+0x8e8 sys/netinet6/icmp6.c:762
ip_deliver(ffff80002e406aa8,ffff80002e406ab4,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:657
ip6_input_if(ffff80002e406aa8,ffff80002e406ab4,29,0,ffff80000019f2a8) at ip6_input_if+0x920
ipv6_input(ffff80000019f2a8,fffffd806c14cc00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:169
if_input_local(ffff80000019f2a8,fffffd806c14cc00,18) at if_input_local+0x136 sys/net/if.c:778
ip6_output(fffffd806c442600,ffff800000c0f400,fffffd8068db3900,0,0,fffffd8068db3888) at ip6_output+0xf57
rip6_output(fffffd8074b97800,fffffd8066bb6d40,ffff80002e406e10,0) at rip6_output+0x4ad sys/netinet6/raw_ip6.c:490
rip6_usrreq(fffffd8066bb6d40,9,fffffd8074b97800,0,0,ffff8000ffff5260) at rip6_usrreq+0x5d3 sys/netinet6/raw_ip6.c:679
sosend(fffffd8066bb6d40,0,ffff80002e407048,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582
dofilewritev(ffff8000ffff5260,4,ffff80002e407048,0,ffff80002e407140) at dofilewritev+0x19c sys/kern/sys_generic.c:381
sys_write(ffff8000ffff5260,ffff80002e4070e8,ffff80002e407140) at sys_write+0x83 sys/kern/sys_generic.c:301
syscall(ffff80002e4071b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002e4071b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7105f59f460, count: -28
---
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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Alexander Bluhm
Mar 23, 2022, 5:21:05 AM3/23/22
to syzbot, syzkaller-o...@googlegroups.com
The party with all these reports should be over when syzkaller
reaches this OpenBSD commit:
https://github.com/openbsd/src/commit/2be5be2c1f9ec945fccf039ef58e16d61f47c3db
2be5be2c1f9e For raw IPv6 packets rip6_input() traverses..
There were three places that had to be fixed: udp, rip, rip6 input.
Unfortunately syzkaller does not see that this is all one problem.
I guess the mangled panic message confuses it.
bluhm
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reaches this OpenBSD commit:
https://github.com/openbsd/src/commit/2be5be2c1f9ec945fccf039ef58e16d61f47c3db
2be5be2c1f9e For raw IPv6 packets rip6_input() traverses..
There were three places that had to be fixed: udp, rip, rip6 input.
Unfortunately syzkaller does not see that this is all one problem.
I guess the mangled panic message confuses it.
bluhm
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> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-openbsd...@googlegroups.com.
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Alexander Bluhm
Mar 23, 2022, 3:16:34 PM3/23/22
to syzbot, syzkaller-o...@googlegroups.com
#syz fix: For raw IPv6 packets rip6_input() traverses the loop of all PCBs. From there it calls sbappendaddr() while holding the raw6 table mutex. This ends in sorwakeup() where we finally grab the kernel lock while holding a mutex. Witness detects this misuse. Use the same solution as for PCB notify. Collect the affected PCBs in a temporary list. The list is protected by exclusive net lock. Reported-by: syzbot+5b2679...@syzkaller.appspotmail.com OK claudio@
On Wed, Mar 23, 2022 at 12:20:19AM -0700, syzbot wrote:
On Wed, Mar 23, 2022 at 12:20:19AM -0700, syzbot wrote:
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