uvm_fault: _bpf_mtap (2)
0 views
Skip to first unread message
syzbot
Jun 20, 2020, 5:14:11 PM6/20/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: c4b445c6 basic macro cleanup: .Fo for long .Fn lines, .Fa ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=166a00e9100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=627307f2c94c96841ac9
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+627307...@syzkaller.appspotmail.com
uvm_fault(0xffffffff82798bb0, 0xfffffd0000000018, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at _bpf_mtap+0x68: movl 0x18(%rbx),%r13d
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xffffffff82798bb0, 0xfffffd0000000018, 0, 1) -> e
_bpf_mtap(ffff800000af0740,fffffd806f15a900,fffffd806f15a900,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281
end trace frame: 0xffff800023f3d750, count: 0
ddb{0}> trace
_bpf_mtap(ffff800000af0740,fffffd806f15a900,fffffd806f15a900,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281
tun_dev_read(5d01,ffff800023f3d9c8,10) at tun_dev_read+0x113
spec_read(ffff800023f3d810) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd806e2aa4e8,ffff800023f3d9c8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd806ca5a140,ffff800023f3d9c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff800020e329d8,f0,ffff800023f3d9c8,0,ffff800023f3dab0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff800020e329d8,ffff800023f3da60,ffff800023f3dab0) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023f3db30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023f3db30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf3e64f18520, count: -9
ddb{0}> show registers
rdi 0xffffffff81da4bc5 _bpf_mtap+0x65
rsi 0x14b
rbp 0xffff800023f3d6e0
rbx 0xfffffd0000000000
rdx 0x14c
rcx 0xffff800021eee000
rax 0xe
r8 0xffffffff8240a83a pp_r600_decoded_lanes+0xa58d
r9 0xffff800000aeee64
r10 0xa
r11 0xc94e470c7cbc7d3a
r12 0xfffffd806f15a900
r13 0xe
r14 0x2
r15 0xffff800000af0740
rip 0xffffffff81da4bc8 _bpf_mtap+0x68
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800023f3d640
ss 0x10
_bpf_mtap+0x68: movl 0x18(%rbx),%r13d
ddb{0}> show proc
PROC (syz-executor.1) pid=411784 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e32288,0xffffffff8290d2f8
process=0xffff800020e19358 user=0xffff800023f38000, vmspace=0xfffffd807afb5d08
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
28195 389168 11104 0 2 0 syz-executor.1
*28195 411784 11104 0 7 0x4000000 syz-executor.1
54929 492247 0 0 3 0x14200 acct acct
52202 304928 1 0 3 0x100083 ttyin getty
17257 108008 0 0 3 0x14200 bored sosplice
11104 342108 60814 0 3 0x82 nanosleep syz-executor.1
70909 93398 60814 0 3 0x82 piperd syz-executor.0
60814 97448 75992 0 3 0x82 thrsleep syz-fuzzer
60814 254462 75992 0 3 0x4000082 nanosleep syz-fuzzer
60814 358992 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 145225 75992 0 7 0x4000002 syz-fuzzer
60814 205277 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 281095 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 132915 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 296567 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 142435 75992 0 3 0x4000082 kqread syz-fuzzer
60814 506929 75992 0 3 0x4000082 thrsleep syz-fuzzer
75992 351427 24433 0 3 0x10008a pause ksh
24433 85156 64532 0 3 0x92 select sshd
64532 72586 1 0 3 0x80 select sshd
98999 192375 75669 74 3 0x100092 bpf pflogd
75669 311198 1 0 3 0x80 netio pflogd
77055 238703 88203 73 3 0x100090 kqread syslogd
88203 240493 1 0 3 0x100082 netio syslogd
95767 188730 1 77 3 0x100090 poll dhclient
18721 442718 1 0 3 0x80 poll dhclient
34882 381279 0 0 3 0x14200 bored smr
36203 69383 0 0 2 0x14200 zerothread
91121 125459 0 0 3 0x14200 aiodoned aiodoned
47156 386619 0 0 3 0x14200 syncer update
35512 259136 0 0 3 0x14200 cleaner cleaner
85723 22766 0 0 3 0x14200 reaper reaper
94866 424440 0 0 3 0x14200 pgdaemon pagedaemon
35118 437327 0 0 3 0x14200 bored crynlk
64136 408265 0 0 3 0x14200 bored crypto
60931 183306 0 0 3 0x40014200 acpi0 acpi0
90355 472997 0 0 3 0x40014200 idle1
98896 202131 0 0 3 0x14200 bored softnet
50966 500220 0 0 3 0x14200 bored systqmp
93054 521977 0 0 3 0x14200 bored systq
31352 8265 0 0 3 0x40014200 bored softclock
97935 314526 0 0 3 0x40014200 idle0
1 388896 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 28195 (syz-executor.1) thread 0xffff800020e329d8 (411784)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b6e58)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 vn_read+0x45 sys/kern/vfs_vnops.c:357
#2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237
#3 sys_read+0x83 sys/kern/sys_generic.c:157
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#5 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9559 6748K 7382K 78643K 13039 0
pcb 13 8K 8K 78643K 126 0
rtable 124 15K 17K 78643K 483 0
ifaddr 104 20K 20K 78643K 188 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 65 0
ioctlops 0 0K 4K 78643K 1572 0
iov 0 0K 16K 78643K 116 0
mount 1 1K 1K 78643K 1 0
vnodes 1224 77K 77K 78643K 1912 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 8 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 306 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 759 0
sigio 0 0K 0K 78643K 5 0
proc 62 63K 95K 78643K 551 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 66 0
in_multi 97 4K 4K 78643K 159 0
ether_multi 1 0K 0K 78643K 13 0
mrt 1 0K 0K 78643K 15 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 277 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 140 104K 118K 78643K 3341 0
UVM aobj 17 2K 2K 78643K 17 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 113 0
NDP 16 0K 0K 78643K 36 0
temp 135 3858K 3926K 78643K 9734 0
kqueue 3 4K 12K 78643K 59 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 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 55 0 53 1 0 1 1 0 8 0
rtentry 112 82 0 39 2 0 2 2 0 8 0
unpcb 120 286 0 276 1 0 1 1 0 8 0
syncache 264 9 0 9 3 3 0 1 0 8 0
tcpqe 32 90 0 90 1 1 0 1 0 8 0
tcpcb 544 470 0 466 1 0 1 1 0 8 0
inpcb 280 986 0 978 5 3 2 2 0 8 1
rttmr 72 3 0 3 2 2 0 1 0 8 0
nd6 48 16 0 11 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 2 0 2 2 1 1 1 0 8 1
pffrag 232 4 0 4 3 3 0 1 0 482 0
pffrnode 88 4 0 4 3 3 0 1 0 8 0
pffrent 40 95 0 95 3 3 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 31 0 25 1 0 1 1 0 8 0
pfstitem 24 27 0 24 1 0 1 1 0 8 0
pfstkey 112 27 0 24 1 0 1 1 0 8 0
pfstate 328 27 0 24 3 1 2 3 0 8 0
pfrule 1360 34 0 21 4 2 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 422 0 198 18 4 14 14 0 8 0
art_table 32 423 0 198 2 0 2 2 0 8 0
art_node 16 79 0 39 1 0 1 1 0 8 0
sysvmsgpl 40 30 0 16 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 304 0 294 1 0 1 1 0 8 0
shmpl 112 15 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2545 0 1141 89 0 89 89 0 8 0
ffsino 272 2545 0 1141 95 0 95 95 0 8 0
nchpl 144 3987 0 2376 60 0 60 60 0 8 0
uvmvnodes 72 3155 0 0 58 0 58 58 0 8 0
vnodes 208 3155 0 0 167 0 167 167 0 8 0
namei 1024 11456 0 11456 2 1 1 1 0 8 1
percpumem 16 43 0 11 1 0 1 1 0 8 0
vcpupl 1984 10 0 0 2 0 2 2 0 8 0
vmpool 560 19 0 9 1 0 1 1 0 8 0
pfiaddrpl 120 12 0 6 1 0 1 1 0 8 0
scxspl 192 11786 0 11786 11 10 1 7 0 8 1
plimitpl 152 75 0 67 1 0 1 1 0 8 0
sigapl 424 979 0 946 4 0 4 4 0 8 0
futexpl 56 14911 0 14911 2 1 1 1 0 8 1
knotepl 112 120 0 101 1 0 1 1 0 8 0
kqueuepl 144 113 0 111 1 0 1 1 0 8 0
pipelkpl 48 191 0 181 1 0 1 1 0 8 0
pipepl 120 382 0 363 1 0 1 1 0 8 0
fdescpl 496 960 0 944 3 0 3 3 0 8 0
filepl 152 5999 0 5898 5 0 5 5 0 8 0
lockfpl 104 170 0 169 1 0 1 1 0 8 0
lockfspl 48 58 0 57 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 23 0 12 1 0 1 1 0 8 0
ucredpl 96 850 0 841 1 0 1 1 0 8 0
zombiepl 144 946 0 946 1 0 1 1 0 8 1
processpl 984 979 0 946 5 0 5 5 0 8 0
procpl 624 2522 0 2479 4 0 4 4 0 8 0
sosppl 128 12 0 12 4 3 1 1 0 8 1
sockpl 400 1332 0 1313 4 1 3 3 0 8 1
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 6 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 6 0 0 1 0 1 1 0 8 0
mcl4k 4096 13 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 170 0 0 21 0 21 21 0 8 1
mtagpl 80 365 0 0 8 0 8 8 0 8 0
mbufpl 256 1210 0 0 74 0 74 74 0 8 0
bufpl 280 5081 0 142 353 0 353 353 0 8 0
anonpl 16 111933 0 95456 93 26 67 82 0 124 0
amapchunkpl 152 6376 0 6213 38 30 8 21 0 158 0
amappl16 192 5377 0 4484 79 34 45 55 0 8 0
amappl15 184 9 0 8 2 1 1 1 0 8 0
amappl14 176 24 0 20 1 0 1 1 0 8 0
amappl13 168 28 0 25 1 0 1 1 0 8 0
amappl12 160 199 0 198 1 0 1 1 0 8 0
amappl11 152 64 0 47 1 0 1 1 0 8 0
amappl10 144 21 0 14 1 0 1 1 0 8 0
amappl9 136 920 0 916 1 0 1 1 0 8 0
amappl8 128 874 0 845 1 0 1 1 0 8 0
amappl7 120 120 0 108 1 0 1 1 0 8 0
amappl6 112 23 0 21 1 0 1 1 0 8 0
amappl5 104 1057 0 1039 1 0 1 1 0 8 0
amappl4 96 507 0 475 1 0 1 1 0 8 0
amappl3 88 125 0 120 1 0 1 1 0 8 0
amappl2 80 6725 0 6649 2 0 2 2 0 8 0
amappl1 72 29361 0 28918 23 13 10 18 0 8 0
amappl 80 2786 0 2734 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 16 0 0 1 0 1 1 0 8 0
uaddrrnd 24 979 0 953 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 979 0 953 1 0 1 1 0 8 0
vmmpekpl 168 11727 0 11689 2 0 2 2 0 8 0
vmmpepl 168 122502 0 120438 125 32 93 113 0 357 0
vmsppl 368 978 0 953 4 1 3 3 0 8 0
pdppl 4096 1965 0 1916 8 1 7 7 0 8 0
pvpl 32 324170 0 304518 208 41 167 196 0 265 6
pmappl 232 978 0 953 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 336 0 12 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
_bpf_mtap(ffff800000af0740,fffffd806f15a900,fffffd806f15a900,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281
tun_dev_read(5d01,ffff800023f3d9c8,10) at tun_dev_read+0x113
spec_read(ffff800023f3d810) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd806e2aa4e8,ffff800023f3d9c8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd806ca5a140,ffff800023f3d9c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff800020e329d8,f0,ffff800023f3d9c8,0,ffff800023f3dab0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff800020e329d8,ffff800023f3da60,ffff800023f3dab0) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023f3db30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023f3db30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf3e64f18520, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020d80ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
end of kernel
end trace frame: 0xc002804668, count: -3
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: c4b445c6 basic macro cleanup: .Fo for long .Fn lines, .Fa ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=166a00e9100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=627307f2c94c96841ac9
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+627307...@syzkaller.appspotmail.com
uvm_fault(0xffffffff82798bb0, 0xfffffd0000000018, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at _bpf_mtap+0x68: movl 0x18(%rbx),%r13d
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xffffffff82798bb0, 0xfffffd0000000018, 0, 1) -> e
_bpf_mtap(ffff800000af0740,fffffd806f15a900,fffffd806f15a900,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281
end trace frame: 0xffff800023f3d750, count: 0
ddb{0}> trace
_bpf_mtap(ffff800000af0740,fffffd806f15a900,fffffd806f15a900,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281
tun_dev_read(5d01,ffff800023f3d9c8,10) at tun_dev_read+0x113
spec_read(ffff800023f3d810) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd806e2aa4e8,ffff800023f3d9c8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd806ca5a140,ffff800023f3d9c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff800020e329d8,f0,ffff800023f3d9c8,0,ffff800023f3dab0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff800020e329d8,ffff800023f3da60,ffff800023f3dab0) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023f3db30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023f3db30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf3e64f18520, count: -9
ddb{0}> show registers
rdi 0xffffffff81da4bc5 _bpf_mtap+0x65
rsi 0x14b
rbp 0xffff800023f3d6e0
rbx 0xfffffd0000000000
rdx 0x14c
rcx 0xffff800021eee000
rax 0xe
r8 0xffffffff8240a83a pp_r600_decoded_lanes+0xa58d
r9 0xffff800000aeee64
r10 0xa
r11 0xc94e470c7cbc7d3a
r12 0xfffffd806f15a900
r13 0xe
r14 0x2
r15 0xffff800000af0740
rip 0xffffffff81da4bc8 _bpf_mtap+0x68
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800023f3d640
ss 0x10
_bpf_mtap+0x68: movl 0x18(%rbx),%r13d
ddb{0}> show proc
PROC (syz-executor.1) pid=411784 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e32288,0xffffffff8290d2f8
process=0xffff800020e19358 user=0xffff800023f38000, vmspace=0xfffffd807afb5d08
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
28195 389168 11104 0 2 0 syz-executor.1
*28195 411784 11104 0 7 0x4000000 syz-executor.1
54929 492247 0 0 3 0x14200 acct acct
52202 304928 1 0 3 0x100083 ttyin getty
17257 108008 0 0 3 0x14200 bored sosplice
11104 342108 60814 0 3 0x82 nanosleep syz-executor.1
70909 93398 60814 0 3 0x82 piperd syz-executor.0
60814 97448 75992 0 3 0x82 thrsleep syz-fuzzer
60814 254462 75992 0 3 0x4000082 nanosleep syz-fuzzer
60814 358992 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 145225 75992 0 7 0x4000002 syz-fuzzer
60814 205277 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 281095 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 132915 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 296567 75992 0 3 0x4000082 thrsleep syz-fuzzer
60814 142435 75992 0 3 0x4000082 kqread syz-fuzzer
60814 506929 75992 0 3 0x4000082 thrsleep syz-fuzzer
75992 351427 24433 0 3 0x10008a pause ksh
24433 85156 64532 0 3 0x92 select sshd
64532 72586 1 0 3 0x80 select sshd
98999 192375 75669 74 3 0x100092 bpf pflogd
75669 311198 1 0 3 0x80 netio pflogd
77055 238703 88203 73 3 0x100090 kqread syslogd
88203 240493 1 0 3 0x100082 netio syslogd
95767 188730 1 77 3 0x100090 poll dhclient
18721 442718 1 0 3 0x80 poll dhclient
34882 381279 0 0 3 0x14200 bored smr
36203 69383 0 0 2 0x14200 zerothread
91121 125459 0 0 3 0x14200 aiodoned aiodoned
47156 386619 0 0 3 0x14200 syncer update
35512 259136 0 0 3 0x14200 cleaner cleaner
85723 22766 0 0 3 0x14200 reaper reaper
94866 424440 0 0 3 0x14200 pgdaemon pagedaemon
35118 437327 0 0 3 0x14200 bored crynlk
64136 408265 0 0 3 0x14200 bored crypto
60931 183306 0 0 3 0x40014200 acpi0 acpi0
90355 472997 0 0 3 0x40014200 idle1
98896 202131 0 0 3 0x14200 bored softnet
50966 500220 0 0 3 0x14200 bored systqmp
93054 521977 0 0 3 0x14200 bored systq
31352 8265 0 0 3 0x40014200 bored softclock
97935 314526 0 0 3 0x40014200 idle0
1 388896 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 28195 (syz-executor.1) thread 0xffff800020e329d8 (411784)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b6e58)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 vn_read+0x45 sys/kern/vfs_vnops.c:357
#2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237
#3 sys_read+0x83 sys/kern/sys_generic.c:157
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#5 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9559 6748K 7382K 78643K 13039 0
pcb 13 8K 8K 78643K 126 0
rtable 124 15K 17K 78643K 483 0
ifaddr 104 20K 20K 78643K 188 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 65 0
ioctlops 0 0K 4K 78643K 1572 0
iov 0 0K 16K 78643K 116 0
mount 1 1K 1K 78643K 1 0
vnodes 1224 77K 77K 78643K 1912 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 8 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 306 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 759 0
sigio 0 0K 0K 78643K 5 0
proc 62 63K 95K 78643K 551 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 66 0
in_multi 97 4K 4K 78643K 159 0
ether_multi 1 0K 0K 78643K 13 0
mrt 1 0K 0K 78643K 15 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 277 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 140 104K 118K 78643K 3341 0
UVM aobj 17 2K 2K 78643K 17 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 113 0
NDP 16 0K 0K 78643K 36 0
temp 135 3858K 3926K 78643K 9734 0
kqueue 3 4K 12K 78643K 59 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 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 55 0 53 1 0 1 1 0 8 0
rtentry 112 82 0 39 2 0 2 2 0 8 0
unpcb 120 286 0 276 1 0 1 1 0 8 0
syncache 264 9 0 9 3 3 0 1 0 8 0
tcpqe 32 90 0 90 1 1 0 1 0 8 0
tcpcb 544 470 0 466 1 0 1 1 0 8 0
inpcb 280 986 0 978 5 3 2 2 0 8 1
rttmr 72 3 0 3 2 2 0 1 0 8 0
nd6 48 16 0 11 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 2 0 2 2 1 1 1 0 8 1
pffrag 232 4 0 4 3 3 0 1 0 482 0
pffrnode 88 4 0 4 3 3 0 1 0 8 0
pffrent 40 95 0 95 3 3 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 31 0 25 1 0 1 1 0 8 0
pfstitem 24 27 0 24 1 0 1 1 0 8 0
pfstkey 112 27 0 24 1 0 1 1 0 8 0
pfstate 328 27 0 24 3 1 2 3 0 8 0
pfrule 1360 34 0 21 4 2 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 422 0 198 18 4 14 14 0 8 0
art_table 32 423 0 198 2 0 2 2 0 8 0
art_node 16 79 0 39 1 0 1 1 0 8 0
sysvmsgpl 40 30 0 16 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 304 0 294 1 0 1 1 0 8 0
shmpl 112 15 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2545 0 1141 89 0 89 89 0 8 0
ffsino 272 2545 0 1141 95 0 95 95 0 8 0
nchpl 144 3987 0 2376 60 0 60 60 0 8 0
uvmvnodes 72 3155 0 0 58 0 58 58 0 8 0
vnodes 208 3155 0 0 167 0 167 167 0 8 0
namei 1024 11456 0 11456 2 1 1 1 0 8 1
percpumem 16 43 0 11 1 0 1 1 0 8 0
vcpupl 1984 10 0 0 2 0 2 2 0 8 0
vmpool 560 19 0 9 1 0 1 1 0 8 0
pfiaddrpl 120 12 0 6 1 0 1 1 0 8 0
scxspl 192 11786 0 11786 11 10 1 7 0 8 1
plimitpl 152 75 0 67 1 0 1 1 0 8 0
sigapl 424 979 0 946 4 0 4 4 0 8 0
futexpl 56 14911 0 14911 2 1 1 1 0 8 1
knotepl 112 120 0 101 1 0 1 1 0 8 0
kqueuepl 144 113 0 111 1 0 1 1 0 8 0
pipelkpl 48 191 0 181 1 0 1 1 0 8 0
pipepl 120 382 0 363 1 0 1 1 0 8 0
fdescpl 496 960 0 944 3 0 3 3 0 8 0
filepl 152 5999 0 5898 5 0 5 5 0 8 0
lockfpl 104 170 0 169 1 0 1 1 0 8 0
lockfspl 48 58 0 57 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 23 0 12 1 0 1 1 0 8 0
ucredpl 96 850 0 841 1 0 1 1 0 8 0
zombiepl 144 946 0 946 1 0 1 1 0 8 1
processpl 984 979 0 946 5 0 5 5 0 8 0
procpl 624 2522 0 2479 4 0 4 4 0 8 0
sosppl 128 12 0 12 4 3 1 1 0 8 1
sockpl 400 1332 0 1313 4 1 3 3 0 8 1
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 6 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 6 0 0 1 0 1 1 0 8 0
mcl4k 4096 13 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 170 0 0 21 0 21 21 0 8 1
mtagpl 80 365 0 0 8 0 8 8 0 8 0
mbufpl 256 1210 0 0 74 0 74 74 0 8 0
bufpl 280 5081 0 142 353 0 353 353 0 8 0
anonpl 16 111933 0 95456 93 26 67 82 0 124 0
amapchunkpl 152 6376 0 6213 38 30 8 21 0 158 0
amappl16 192 5377 0 4484 79 34 45 55 0 8 0
amappl15 184 9 0 8 2 1 1 1 0 8 0
amappl14 176 24 0 20 1 0 1 1 0 8 0
amappl13 168 28 0 25 1 0 1 1 0 8 0
amappl12 160 199 0 198 1 0 1 1 0 8 0
amappl11 152 64 0 47 1 0 1 1 0 8 0
amappl10 144 21 0 14 1 0 1 1 0 8 0
amappl9 136 920 0 916 1 0 1 1 0 8 0
amappl8 128 874 0 845 1 0 1 1 0 8 0
amappl7 120 120 0 108 1 0 1 1 0 8 0
amappl6 112 23 0 21 1 0 1 1 0 8 0
amappl5 104 1057 0 1039 1 0 1 1 0 8 0
amappl4 96 507 0 475 1 0 1 1 0 8 0
amappl3 88 125 0 120 1 0 1 1 0 8 0
amappl2 80 6725 0 6649 2 0 2 2 0 8 0
amappl1 72 29361 0 28918 23 13 10 18 0 8 0
amappl 80 2786 0 2734 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 16 0 0 1 0 1 1 0 8 0
uaddrrnd 24 979 0 953 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 979 0 953 1 0 1 1 0 8 0
vmmpekpl 168 11727 0 11689 2 0 2 2 0 8 0
vmmpepl 168 122502 0 120438 125 32 93 113 0 357 0
vmsppl 368 978 0 953 4 1 3 3 0 8 0
pdppl 4096 1965 0 1916 8 1 7 7 0 8 0
pvpl 32 324170 0 304518 208 41 167 196 0 265 6
pmappl 232 978 0 953 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 336 0 12 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
_bpf_mtap(ffff800000af0740,fffffd806f15a900,fffffd806f15a900,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281
tun_dev_read(5d01,ffff800023f3d9c8,10) at tun_dev_read+0x113
spec_read(ffff800023f3d810) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd806e2aa4e8,ffff800023f3d9c8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd806ca5a140,ffff800023f3d9c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff800020e329d8,f0,ffff800023f3d9c8,0,ffff800023f3dab0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff800020e329d8,ffff800023f3da60,ffff800023f3dab0) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023f3db30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023f3db30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf3e64f18520, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020d80ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
end of kernel
end trace frame: 0xc002804668, count: -3
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Oct 3, 2020, 11:08:11 AM10/3/20
to syzkaller-o...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
Reply all
Reply to author
Forward
0 new messages