uvm_fault: kqueue_scan
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syzbot
Sep 30, 2019, 5:41:07 AM9/30/19
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: f6e3733c Introduce SC_DEBUG_SENSE() and simplify code by e..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14048acd600000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=c813ea42bd08d33e5e8d
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+c813ea...@syzkaller.appspotmail.com
login: uvm_fault(0xfffffd806e7e35c8, 0x25e, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at kqueue_scan+0x47f: movq 0x18(%rax),%r11
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xfffffd806e7e35c8, 0x25e, 0, 1) -> e
kqueue_scan(fffffd806e81fdd0,40,c00013f698,ffff800020b49690,ffff800020a5e280,ffff800020b496dc)
at
kqueue_scan+0x47f sys/kern/kern_event.c:771
end trace frame: 0xffff800020b49740, count: 0
ddb{0}> trace
kqueue_scan(fffffd806e81fdd0,40,c00013f698,ffff800020b49690,ffff800020a5e280,ffff800020b496dc)
at
kqueue_scan+0x47f sys/kern/kern_event.c:771
sys_kevent(ffff800020a5e280,ffff800020b49750,ffff800020b497a0) at
sys_kevent+0x48b sys/kern/kern_event.c:553
syscall(ffff800020b49820) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b49820) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,48,c00013f680,48,ffffffffffffffff,4) at Xsyscall+0x128
end of kernel
end trace frame: 0xc00013fe98, count: -4
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020b49580
rbx 0
rdx 0xffff800020b49438
rcx 0
rax 0x246
r8 0xffff800020a5e280
r9 0xffff800020b496dc
r10 0xff8058dc5f9f37ce
r11 0x7fa723dd8dcca9
r12 0x1
r13 0xfffffd806e81fdd0
r14 0xffff800020b03780
r15 0xffff800020b03768
rip 0xffffffff820b8bbf kqueue_scan+0x47f
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800020b49330
ss 0x10
kqueue_scan+0x47f: movq 0x18(%rax),%r11
ddb{0}> show proc
PROC (syz-fuzzer) pid=167367 stat=onproc
flags process=2<EXEC> proc=4000000<THREAD>
pri=17, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020a5e4f8,0xffff800020a5e9f8
process=0xffff800020a8b890 user=0xffff800020b44000,
vmspace=0xfffffd806e7e35c8
estcpu=0, cpticks=1, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
78897 311149 1 0 3 0x100083 ttyin getty
98503 254644 74077 0 3 0x2 biowait syz-executor.0
10217 419976 0 0 3 0x14200 acct acct
64167 154049 0 0 3 0x14200 bored sosplice
74077 180752 16580 0 2 0x3 syz-fuzzer
74077 290001 16580 0 2 0x4000003 syz-fuzzer
74077 214277 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 480247 16580 0 2 0x4000003 syz-fuzzer
74077 305080 16580 0 3 0x4000082 thrsleep syz-fuzzer
*74077 167367 16580 0 7 0x4000002 syz-fuzzer
74077 172928 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 245248 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 247931 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 217174 16580 0 3 0x4000082 thrsleep syz-fuzzer
16580 5933 59025 0 3 0x10008a pause ksh
59025 239343 97136 0 3 0x92 select sshd
97136 29512 1 0 3 0x80 select sshd
38468 410760 17354 74 3 0x100092 bpf pflogd
17354 495564 1 0 3 0x80 netio pflogd
72001 295608 43049 73 3 0x100090 kqread syslogd
43049 280606 1 0 3 0x100082 netio syslogd
44986 67248 1 77 3 0x100090 poll dhclient
97921 33673 1 0 3 0x80 poll dhclient
10521 121928 0 0 3 0x14200 pgzero zerothread
86389 452609 0 0 3 0x14200 aiodoned aiodoned
80705 391633 0 0 3 0x14200 syncer update
89400 108133 0 0 3 0x14200 cleaner cleaner
8115 260378 0 0 7 0x14200 reaper
19313 175365 0 0 3 0x14200 pgdaemon pagedaemon
1288 104782 0 0 3 0x14200 bored crynlk
59234 221284 0 0 3 0x14200 bored crypto
71585 145833 0 0 3 0x40014200 acpi0 acpi0
10565 228537 0 0 3 0x40014200 idle1
96647 276797 0 0 3 0x14200 bored softnet
74881 229835 0 0 3 0x14200 bored systqmp
47571 365125 0 0 3 0x14200 bored systq
16670 351451 0 0 3 0x40014200 bored softclock
12929 421052 0 0 3 0x40014200 idle0
42936 56716 0 0 3 0x14200 bored smr
1 364181 0 0 2 0x82 init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 98503 (syz-executor.0) thread 0xffff800020ab1b40 (254644)
exclusive rrwlock inode r = 0 (0xfffffd806e1abf88)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 uvm_vnp_uncache+0xe6 sys/uvm/uvm_vnode.c:1334
#6 dounlinkat+0x17b sys/kern/vfs_syscalls.c:1821
#7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#8 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ec48918)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 cache_lookup+0x2bb sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1bc sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#9 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#10 namei+0x63c sys/kern/vfs_lookup.c:249
#11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#13 Xsyscall+0x128
Process 74077 (syz-fuzzer) thread 0xffff800020a5e280 (167367)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82676880)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:441
#3 sleep_finish+0x113 sys/kern/kern_synch.c:373
#4 tsleep+0x198 sleep_finish_timeout sys/kern/kern_synch.c:397 [inline]
#4 tsleep+0x198 sleep_finish_all sys/kern/kern_synch.c:183 [inline]
#4 tsleep+0x198 sys/kern/kern_synch.c:152
#5 getblk+0x14c sys/kern/vfs_bio.c:993
#6 bread+0x3a bio_doread sys/kern/vfs_bio.c:435 [inline]
#6 bread+0x3a sys/kern/vfs_bio.c:480
#7 ffs1_balloc+0x123e sys/ufs/ffs/ffs_balloc.c:364
#8 ffs_write+0x3c1 sys/ufs/ffs/ffs_vnops.c:345
#9 VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
#10 ktrwriteraw+0x148 sys/kern/kern_ktrace.c:653
#11 ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:620 [inline]
#11 ktrstruct+0x169 sys/kern/kern_ktrace.c:306
#12 sys_kevent+0x14a sys/kern/kern_event.c:505
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9599 7075K 8154K 78643K 15217 0 0
pcb 13 10K 12K 78643K 406 0 0
rtable 104 13K 14K 78643K 1504 0 0
ifaddr 79 16K 18K 78643K 457 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1540 0 0
iov 0 0K 32K 78643K 401 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1224 77K 78K 78643K 3129 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 32 0 0
VM map 2 1K 1K 78643K 17 0 0
sem 12 0K 1K 78643K 395 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 3 5K 25K 78643K 2009 0 0
sigio 0 0K 0K 78643K 37 0 0
proc 62 63K 95K 78643K 1070 0 0
subproc 16 1K 2K 78643K 208 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 140 0 0
in_multi 19 1K 2K 78643K 248 0 0
ether_multi 1 0K 0K 78643K 20 0 0
mrt 0 0K 0K 78643K 21 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 192 848K 848K 78643K 192 0 0
exec 0 0K 1K 78643K 555 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 122 22K 31K 78643K 8587 0 0
UVM aobj 130 4K 4K 78643K 139 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 363 0 0
NDP 19 0K 0K 78643K 141 0 0
temp 221 3560K 4199K 78643K 48302 0 0
kqueue 0 0K 0K 78643K 45 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 54 0 48 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 147 0 145 1 0 1 1 0
8 0
rtentry 112 249 0 213 2 0 2 2 0
8 0
unpcb 120 840 0 829 3 2 1 2 0
8 0
syncache 264 18 0 18 7 7 0 1 0
8 0
tcpqe 32 7052 0 7052 2 2 0 1 0
8 0
tcpcb 544 674 0 670 2 1 1 2 0
8 0
inpcb 280 2653 0 2644 26 25 1 13 0
8 0
rttmr 72 5 0 5 4 4 0 1 0
8 0
nd6 48 31 0 30 1 0 1 1 0
8 0
pkpcb 40 17 0 17 8 8 0 1 0
8 0
ppxss 1128 65 0 65 16 16 0 1 0
8 0
pffrag 232 37 0 37 12 12 0 1 0
482 0
pffrnode 88 37 0 37 12 12 0 1 0
8 0
pffrent 40 472 0 472 12 12 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
pfstitem 24 169 0 161 1 0 1 1 0
8 0
pfstkey 112 169 0 161 2 0 2 2 0
8 0
pfstate 328 169 0 161 4 3 1 4 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 3 0 2 3 2 1 3 0
8 0
art_heap4 256 1020 0 850 25 12 13 15 0
8 0
art_table 32 1023 0 852 2 0 2 2 0
8 0
art_node 16 247 0 213 1 0 1 1 0
8 0
sysvmsgpl 40 21 0 6 1 0 1 1 0
8 0
semupl 112 1 0 1 1 1 0 1 0
8 0
semapl 112 393 0 383 1 0 1 1 0
8 0
shmpl 112 137 0 9 4 0 4 4 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 4593 0 3194 46 0 46 46 0
8 0
ffsino 272 4593 0 3194 95 1 94 95 0
8 0
nchpl 144 8162 0 6548 61 0 61 61 0
8 0
uvmvnodes 72 5910 0 0 108 0 108 108 0
8 0
vnodes 208 5910 0 0 312 0 312 312 0
8 0
namei 1024 29160 0 29160 4 3 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
vmpool 552 15 0 15 7 7 0 1 0
8 0
scsiplug 64 4 0 4 3 3 0 1 0
8 0
scxspl 192 22774 0 22771 28 27 1 7 0
8 0
plimitpl 152 162 0 154 1 0 1 1 0
8 0
sigapl 432 2180 0 2166 5 3 2 3 0
8 0
futexpl 56 39484 0 39484 1 0 1 1 0
8 1
knotepl 112 957 0 938 2 1 1 2 0
8 0
kqueuepl 104 1392 0 1390 1 0 1 1 0
8 0
pipepl 112 1786 0 1770 9 8 1 2 0
8 0
fdescpl 488 2181 0 2167 3 0 3 3 0
8 0
filepl 152 20304 0 20223 35 30 5 13 0
8 0
lockfpl 104 800 0 799 1 0 1 1 0
8 0
lockfspl 48 288 0 287 1 0 1 1 0
8 0
sessionpl 112 29 0 18 1 0 1 1 0
8 0
pgrppl 48 47 0 36 1 0 1 1 0
8 0
ucredpl 96 4604 0 4595 1 0 1 1 0
8 0
zombiepl 144 2168 0 2166 4 3 1 1 0
8 0
processpl 896 2199 0 2166 5 1 4 5 0
8 0
procpl 632 7273 0 7231 5 0 5 5 0
8 0
srpgc 64 14 0 14 5 5 0 1 0
8 0
sosppl 128 11 0 11 5 5 0 1 0
8 0
sockpl 384 3705 0 3685 40 37 3 22 0
8 0
mcl64k 65536 12 0 0 2 0 2 2 0
8 0
mcl16k 16384 8 0 0 1 0 1 1 0
8 0
mcl12k 12288 14 0 0 2 0 2 2 0
8 0
mcl9k 9216 9 0 0 1 0 1 1 0
8 0
mcl8k 8192 18 0 0 3 1 2 3 0
8 0
mcl4k 4096 25 0 0 3 1 2 3 0
8 0
mcl2k2 2112 9 0 0 1 0 1 1 0
8 0
mcl2k 2048 210 0 0 21 7 14 21 0
8 0
mtagpl 80 81 0 0 1 0 1 1 0
8 0
mbufpl 256 612 0 0 31 0 31 31 0
8 0
bufpl 256 11285 0 4237 441 0 441 441 0
8 0
anonpl 16 346813 0 330008 112 35 77 85 0
124 0
amapchunkpl 152 15369 0 15253 34 28 6 13 0
158 0
amappl16 192 18236 0 17196 111 56 55 66 0
8 0
amappl15 184 8 0 8 1 1 0 1 0
8 0
amappl14 176 381 0 379 2 1 1 1 0
8 0
amappl13 168 308 0 307 2 1 1 1 0
8 0
amappl12 160 301 0 298 2 1 1 1 0
8 0
amappl11 152 890 0 875 1 0 1 1 0
8 0
amappl10 144 29 0 24 1 0 1 1 0
8 0
amappl9 136 883 0 875 1 0 1 1 0
8 0
amappl8 128 429 0 392 2 0 2 2 0
8 0
amappl7 120 97 0 89 1 0 1 1 0
8 0
amappl6 112 907 0 894 1 0 1 1 0
8 0
amappl5 104 506 0 489 1 0 1 1 0
8 0
amappl4 96 2233 0 2206 1 0 1 1 0
8 0
amappl3 88 932 0 925 1 0 1 1 0
8 0
amappl2 80 15888 0 15818 4 2 2 3 0
8 0
amappl1 72 59379 0 58941 27 17 10 20 0
8 0
amappl 80 7682 0 7641 4 2 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 17 0 17 1 1 0 1 0
8 0
aobjpl 64 138 0 9 3 0 3 3 0
8 0
uaddrrnd 24 2196 0 2165 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 2196 0 2165 1 0 1 1 0
8 0
vmmpekpl 168 24560 0 24527 2 0 2 2 0
8 0
vmmpepl 168 289398 0 287214 303 200 103 142 0
357 0
vmsppl 368 2180 0 2165 2 0 2 2 0
8 0
pdppl 4096 4399 0 4360 7 2 5 6 0
8 0
pvpl 32 938834 0 918340 335 149 186 210 0
265 7
pmappl 232 2195 0 2180 12 11 1 2 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 647 0 33 18 0 18 18 0
8 0
---
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: f6e3733c Introduce SC_DEBUG_SENSE() and simplify code by e..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14048acd600000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=c813ea42bd08d33e5e8d
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+c813ea...@syzkaller.appspotmail.com
login: uvm_fault(0xfffffd806e7e35c8, 0x25e, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at kqueue_scan+0x47f: movq 0x18(%rax),%r11
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xfffffd806e7e35c8, 0x25e, 0, 1) -> e
kqueue_scan(fffffd806e81fdd0,40,c00013f698,ffff800020b49690,ffff800020a5e280,ffff800020b496dc)
at
kqueue_scan+0x47f sys/kern/kern_event.c:771
end trace frame: 0xffff800020b49740, count: 0
ddb{0}> trace
kqueue_scan(fffffd806e81fdd0,40,c00013f698,ffff800020b49690,ffff800020a5e280,ffff800020b496dc)
at
kqueue_scan+0x47f sys/kern/kern_event.c:771
sys_kevent(ffff800020a5e280,ffff800020b49750,ffff800020b497a0) at
sys_kevent+0x48b sys/kern/kern_event.c:553
syscall(ffff800020b49820) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b49820) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,48,c00013f680,48,ffffffffffffffff,4) at Xsyscall+0x128
end of kernel
end trace frame: 0xc00013fe98, count: -4
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020b49580
rbx 0
rdx 0xffff800020b49438
rcx 0
rax 0x246
r8 0xffff800020a5e280
r9 0xffff800020b496dc
r10 0xff8058dc5f9f37ce
r11 0x7fa723dd8dcca9
r12 0x1
r13 0xfffffd806e81fdd0
r14 0xffff800020b03780
r15 0xffff800020b03768
rip 0xffffffff820b8bbf kqueue_scan+0x47f
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800020b49330
ss 0x10
kqueue_scan+0x47f: movq 0x18(%rax),%r11
ddb{0}> show proc
PROC (syz-fuzzer) pid=167367 stat=onproc
flags process=2<EXEC> proc=4000000<THREAD>
pri=17, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020a5e4f8,0xffff800020a5e9f8
process=0xffff800020a8b890 user=0xffff800020b44000,
vmspace=0xfffffd806e7e35c8
estcpu=0, cpticks=1, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
78897 311149 1 0 3 0x100083 ttyin getty
98503 254644 74077 0 3 0x2 biowait syz-executor.0
10217 419976 0 0 3 0x14200 acct acct
64167 154049 0 0 3 0x14200 bored sosplice
74077 180752 16580 0 2 0x3 syz-fuzzer
74077 290001 16580 0 2 0x4000003 syz-fuzzer
74077 214277 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 480247 16580 0 2 0x4000003 syz-fuzzer
74077 305080 16580 0 3 0x4000082 thrsleep syz-fuzzer
*74077 167367 16580 0 7 0x4000002 syz-fuzzer
74077 172928 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 245248 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 247931 16580 0 3 0x4000082 thrsleep syz-fuzzer
74077 217174 16580 0 3 0x4000082 thrsleep syz-fuzzer
16580 5933 59025 0 3 0x10008a pause ksh
59025 239343 97136 0 3 0x92 select sshd
97136 29512 1 0 3 0x80 select sshd
38468 410760 17354 74 3 0x100092 bpf pflogd
17354 495564 1 0 3 0x80 netio pflogd
72001 295608 43049 73 3 0x100090 kqread syslogd
43049 280606 1 0 3 0x100082 netio syslogd
44986 67248 1 77 3 0x100090 poll dhclient
97921 33673 1 0 3 0x80 poll dhclient
10521 121928 0 0 3 0x14200 pgzero zerothread
86389 452609 0 0 3 0x14200 aiodoned aiodoned
80705 391633 0 0 3 0x14200 syncer update
89400 108133 0 0 3 0x14200 cleaner cleaner
8115 260378 0 0 7 0x14200 reaper
19313 175365 0 0 3 0x14200 pgdaemon pagedaemon
1288 104782 0 0 3 0x14200 bored crynlk
59234 221284 0 0 3 0x14200 bored crypto
71585 145833 0 0 3 0x40014200 acpi0 acpi0
10565 228537 0 0 3 0x40014200 idle1
96647 276797 0 0 3 0x14200 bored softnet
74881 229835 0 0 3 0x14200 bored systqmp
47571 365125 0 0 3 0x14200 bored systq
16670 351451 0 0 3 0x40014200 bored softclock
12929 421052 0 0 3 0x40014200 idle0
42936 56716 0 0 3 0x14200 bored smr
1 364181 0 0 2 0x82 init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 98503 (syz-executor.0) thread 0xffff800020ab1b40 (254644)
exclusive rrwlock inode r = 0 (0xfffffd806e1abf88)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 uvm_vnp_uncache+0xe6 sys/uvm/uvm_vnode.c:1334
#6 dounlinkat+0x17b sys/kern/vfs_syscalls.c:1821
#7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#8 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ec48918)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:562
#5 vget+0x1c3 sys/kern/vfs_subr.c:672
#6 cache_lookup+0x2bb sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1bc sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#9 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#10 namei+0x63c sys/kern/vfs_lookup.c:249
#11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#13 Xsyscall+0x128
Process 74077 (syz-fuzzer) thread 0xffff800020a5e280 (167367)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82676880)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:441
#3 sleep_finish+0x113 sys/kern/kern_synch.c:373
#4 tsleep+0x198 sleep_finish_timeout sys/kern/kern_synch.c:397 [inline]
#4 tsleep+0x198 sleep_finish_all sys/kern/kern_synch.c:183 [inline]
#4 tsleep+0x198 sys/kern/kern_synch.c:152
#5 getblk+0x14c sys/kern/vfs_bio.c:993
#6 bread+0x3a bio_doread sys/kern/vfs_bio.c:435 [inline]
#6 bread+0x3a sys/kern/vfs_bio.c:480
#7 ffs1_balloc+0x123e sys/ufs/ffs/ffs_balloc.c:364
#8 ffs_write+0x3c1 sys/ufs/ffs/ffs_vnops.c:345
#9 VOP_WRITE+0xc6 sys/kern/vfs_vops.c:269
#10 ktrwriteraw+0x148 sys/kern/kern_ktrace.c:653
#11 ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:620 [inline]
#11 ktrstruct+0x169 sys/kern/kern_ktrace.c:306
#12 sys_kevent+0x14a sys/kern/kern_event.c:505
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#14 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9599 7075K 8154K 78643K 15217 0 0
pcb 13 10K 12K 78643K 406 0 0
rtable 104 13K 14K 78643K 1504 0 0
ifaddr 79 16K 18K 78643K 457 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1540 0 0
iov 0 0K 32K 78643K 401 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1224 77K 78K 78643K 3129 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 32 0 0
VM map 2 1K 1K 78643K 17 0 0
sem 12 0K 1K 78643K 395 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 3 5K 25K 78643K 2009 0 0
sigio 0 0K 0K 78643K 37 0 0
proc 62 63K 95K 78643K 1070 0 0
subproc 16 1K 2K 78643K 208 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 140 0 0
in_multi 19 1K 2K 78643K 248 0 0
ether_multi 1 0K 0K 78643K 20 0 0
mrt 0 0K 0K 78643K 21 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 192 848K 848K 78643K 192 0 0
exec 0 0K 1K 78643K 555 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 122 22K 31K 78643K 8587 0 0
UVM aobj 130 4K 4K 78643K 139 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 363 0 0
NDP 19 0K 0K 78643K 141 0 0
temp 221 3560K 4199K 78643K 48302 0 0
kqueue 0 0K 0K 78643K 45 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 54 0 48 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 147 0 145 1 0 1 1 0
8 0
rtentry 112 249 0 213 2 0 2 2 0
8 0
unpcb 120 840 0 829 3 2 1 2 0
8 0
syncache 264 18 0 18 7 7 0 1 0
8 0
tcpqe 32 7052 0 7052 2 2 0 1 0
8 0
tcpcb 544 674 0 670 2 1 1 2 0
8 0
inpcb 280 2653 0 2644 26 25 1 13 0
8 0
rttmr 72 5 0 5 4 4 0 1 0
8 0
nd6 48 31 0 30 1 0 1 1 0
8 0
pkpcb 40 17 0 17 8 8 0 1 0
8 0
ppxss 1128 65 0 65 16 16 0 1 0
8 0
pffrag 232 37 0 37 12 12 0 1 0
482 0
pffrnode 88 37 0 37 12 12 0 1 0
8 0
pffrent 40 472 0 472 12 12 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
pfstitem 24 169 0 161 1 0 1 1 0
8 0
pfstkey 112 169 0 161 2 0 2 2 0
8 0
pfstate 328 169 0 161 4 3 1 4 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 3 0 2 3 2 1 3 0
8 0
art_heap4 256 1020 0 850 25 12 13 15 0
8 0
art_table 32 1023 0 852 2 0 2 2 0
8 0
art_node 16 247 0 213 1 0 1 1 0
8 0
sysvmsgpl 40 21 0 6 1 0 1 1 0
8 0
semupl 112 1 0 1 1 1 0 1 0
8 0
semapl 112 393 0 383 1 0 1 1 0
8 0
shmpl 112 137 0 9 4 0 4 4 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 4593 0 3194 46 0 46 46 0
8 0
ffsino 272 4593 0 3194 95 1 94 95 0
8 0
nchpl 144 8162 0 6548 61 0 61 61 0
8 0
uvmvnodes 72 5910 0 0 108 0 108 108 0
8 0
vnodes 208 5910 0 0 312 0 312 312 0
8 0
namei 1024 29160 0 29160 4 3 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
vmpool 552 15 0 15 7 7 0 1 0
8 0
scsiplug 64 4 0 4 3 3 0 1 0
8 0
scxspl 192 22774 0 22771 28 27 1 7 0
8 0
plimitpl 152 162 0 154 1 0 1 1 0
8 0
sigapl 432 2180 0 2166 5 3 2 3 0
8 0
futexpl 56 39484 0 39484 1 0 1 1 0
8 1
knotepl 112 957 0 938 2 1 1 2 0
8 0
kqueuepl 104 1392 0 1390 1 0 1 1 0
8 0
pipepl 112 1786 0 1770 9 8 1 2 0
8 0
fdescpl 488 2181 0 2167 3 0 3 3 0
8 0
filepl 152 20304 0 20223 35 30 5 13 0
8 0
lockfpl 104 800 0 799 1 0 1 1 0
8 0
lockfspl 48 288 0 287 1 0 1 1 0
8 0
sessionpl 112 29 0 18 1 0 1 1 0
8 0
pgrppl 48 47 0 36 1 0 1 1 0
8 0
ucredpl 96 4604 0 4595 1 0 1 1 0
8 0
zombiepl 144 2168 0 2166 4 3 1 1 0
8 0
processpl 896 2199 0 2166 5 1 4 5 0
8 0
procpl 632 7273 0 7231 5 0 5 5 0
8 0
srpgc 64 14 0 14 5 5 0 1 0
8 0
sosppl 128 11 0 11 5 5 0 1 0
8 0
sockpl 384 3705 0 3685 40 37 3 22 0
8 0
mcl64k 65536 12 0 0 2 0 2 2 0
8 0
mcl16k 16384 8 0 0 1 0 1 1 0
8 0
mcl12k 12288 14 0 0 2 0 2 2 0
8 0
mcl9k 9216 9 0 0 1 0 1 1 0
8 0
mcl8k 8192 18 0 0 3 1 2 3 0
8 0
mcl4k 4096 25 0 0 3 1 2 3 0
8 0
mcl2k2 2112 9 0 0 1 0 1 1 0
8 0
mcl2k 2048 210 0 0 21 7 14 21 0
8 0
mtagpl 80 81 0 0 1 0 1 1 0
8 0
mbufpl 256 612 0 0 31 0 31 31 0
8 0
bufpl 256 11285 0 4237 441 0 441 441 0
8 0
anonpl 16 346813 0 330008 112 35 77 85 0
124 0
amapchunkpl 152 15369 0 15253 34 28 6 13 0
158 0
amappl16 192 18236 0 17196 111 56 55 66 0
8 0
amappl15 184 8 0 8 1 1 0 1 0
8 0
amappl14 176 381 0 379 2 1 1 1 0
8 0
amappl13 168 308 0 307 2 1 1 1 0
8 0
amappl12 160 301 0 298 2 1 1 1 0
8 0
amappl11 152 890 0 875 1 0 1 1 0
8 0
amappl10 144 29 0 24 1 0 1 1 0
8 0
amappl9 136 883 0 875 1 0 1 1 0
8 0
amappl8 128 429 0 392 2 0 2 2 0
8 0
amappl7 120 97 0 89 1 0 1 1 0
8 0
amappl6 112 907 0 894 1 0 1 1 0
8 0
amappl5 104 506 0 489 1 0 1 1 0
8 0
amappl4 96 2233 0 2206 1 0 1 1 0
8 0
amappl3 88 932 0 925 1 0 1 1 0
8 0
amappl2 80 15888 0 15818 4 2 2 3 0
8 0
amappl1 72 59379 0 58941 27 17 10 20 0
8 0
amappl 80 7682 0 7641 4 2 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 17 0 17 1 1 0 1 0
8 0
aobjpl 64 138 0 9 3 0 3 3 0
8 0
uaddrrnd 24 2196 0 2165 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 2196 0 2165 1 0 1 1 0
8 0
vmmpekpl 168 24560 0 24527 2 0 2 2 0
8 0
vmmpepl 168 289398 0 287214 303 200 103 142 0
357 0
vmsppl 368 2180 0 2165 2 0 2 2 0
8 0
pdppl 4096 4399 0 4360 7 2 5 6 0
8 0
pvpl 32 938834 0 918340 335 149 186 210 0
265 7
pmappl 232 2195 0 2180 12 11 1 2 0
8 0
extentpl 40 41 0 26 1 0 1 1 0
8 0
phpool 112 647 0 33 18 0 18 18 0
8 0
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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Anton Lindqvist
Oct 22, 2019, 6:40:04 AM10/22/19
to syzbot, syzkaller-o...@googlegroups.com
#syz fix: put bpfdesc reference counting back, revert change introduced in 1.175 as: BPF: remove redundant reference counting of filedescriptors
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