uvm_fault: uvm_map_clean
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syzbot
May 7, 2020, 12:08:16 PM5/7/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 99490db6 Currently LibreSSL reports an unknown SSL_interna..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=161e4370100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=4557b0d636641e38522b
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+4557b0...@syzkaller.appspotmail.com
uvm_fault(0xffffffff8253edf0, 0xfffffd0000000048, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_map_clean+0x44a: movl 0x48(%r15),%ebx
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel page fault
uvm_fault(0xffffffff8253edf0, 0xfffffd0000000048, 0, 1) -> e
uvm_map_clean(fffffd806e954178,c002cca000,c003138000,8) at uvm_map_clean+0x44a sys/uvm/uvm_map.c:4677
end trace frame: 0xffff800020f43460, count: 0
ddb{1}> trace
uvm_map_clean(fffffd806e954178,c002cca000,c003138000,8) at uvm_map_clean+0x44a sys/uvm/uvm_map.c:4677
syscall(ffff800020f43470) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f43470) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00004feb8, count: -3
ddb{1}> show registers
rdi 0x11
rsi 0x10
rbp 0xffff800020f43390
rbx 0xc002d7c000
rdx 0x7
rcx 0
rax 0xfffffd80650aa000
r8 0xffffffff815a1263 uvm_map_clean+0x483
r9 0x5
r10 0x184c6023d21b710f
r11 0xcfac7ccd6c814b0f
r12 0xc003138000
r13 0xc002d7c000
r14 0xfffffd80650aa000
r15 0xfffffd0000000000
rip 0xffffffff815a122a uvm_map_clean+0x44a
cs 0x8
rflags 0x10286 __ALIGN_SIZE+0xf286
rsp 0xffff800020f432d0
ss 0x10
uvm_map_clean+0x44a: movl 0x48(%r15),%ebx
ddb{1}> show proc
PROC (syz-fuzzer) pid=178812 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=4000000<THREAD>
pri=86, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020ed1d50,0xffff800020e6ceb8
process=0xffff800020ec9728 user=0xffff800020f3e000, vmspace=0xfffffd806e954178
estcpu=1, cpticks=6, pctcpu=0.2
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
81089 175303 79498 0 7 0x10 syz-executor.0
81089 411118 79498 0 3 0x4000090 fifow syz-executor.0
81089 109066 79498 0 3 0x4000090 fsleep syz-executor.0
81089 154319 79498 0 3 0x4000090 fifow syz-executor.0
81089 416687 79498 0 3 0x4000090 fifow syz-executor.0
81089 446265 79498 0 3 0x4000090 fsleep syz-executor.0
16409 36352 1 0 3 0x100083 ttyin getty
39470 387130 0 0 3 0x14200 bored sosplice
79498 234589 33331 0 3 0x82 nanosleep syz-executor.0
33331 99473 61265 0 3 0x82 thrsleep syz-fuzzer
33331 95824 61265 0 3 0x4000082 nanosleep syz-fuzzer
33331 97492 61265 0 3 0x4000082 kqread syz-fuzzer
33331 84567 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 184054 61265 0 3 0x4000082 thrsleep syz-fuzzer
*33331 178812 61265 0 7 0x4000002 syz-fuzzer
33331 385736 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 352873 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 46603 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 234823 61265 0 3 0x4000082 thrsleep syz-fuzzer
61265 376716 22148 0 3 0x10008a pause ksh
22148 51877 51271 0 3 0x92 select sshd
51271 433487 1 0 3 0x80 select sshd
65066 240054 1625 74 3 0x100092 bpf pflogd
1625 179963 1 0 3 0x80 netio pflogd
21657 139722 48279 73 3 0x100090 kqread syslogd
48279 289533 1 0 3 0x100082 netio syslogd
17495 495008 1 77 3 0x100090 poll dhclient
87304 74984 1 0 3 0x80 poll dhclient
18199 197003 0 0 3 0x14200 bored smr
3164 111320 0 0 2 0x14200 zerothread
23267 53152 0 0 3 0x14200 aiodoned aiodoned
70008 150433 0 0 3 0x14200 syncer update
78367 340052 0 0 3 0x14200 cleaner cleaner
72006 230201 0 0 3 0x14200 reaper reaper
27581 7050 0 0 3 0x14200 pgdaemon pagedaemon
19428 146702 0 0 3 0x14200 bored crynlk
49592 26952 0 0 3 0x14200 bored crypto
8932 251241 0 0 3 0x40014200 acpi0 acpi0
60734 17507 0 0 3 0x40014200 idle1
82160 289644 0 0 3 0x14200 bored softnet
26377 50462 0 0 3 0x14200 bored systqmp
37476 506352 0 0 3 0x14200 bored systq
16121 436710 0 0 3 0x40014200 bored softclock
35097 22269 0 0 3 0x40014200 idle0
1 266331 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 33331 (syz-fuzzer) thread 0xffff800020e6cc38 (178812)
shared rwlock vmmaplk r = 0 (0xfffffd806e954190)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 uvm_map_clean+0xe2 vm_map_lock_read_ln sys/uvm/uvm_map.c:5467 [inline]
#1 uvm_map_clean+0xe2 sys/uvm/uvm_map.c:4628
#2 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#3 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8266c1b0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570
#2 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9523 6425K 6819K 78643K 11119 0
pcb 14 8K 8K 78643K 124 0
rtable 82 3K 4K 78643K 301 0
ifaddr 74 14K 16K 78643K 125 0
counters 41 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1491 0
iov 0 0K 28K 78643K 155 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1385 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 38 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 4 9K 25K 78643K 350 0
sigio 0 0K 0K 78643K 9 0
proc 63 63K 83K 78643K 501 0
subproc 16 1K 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 35 0
in_multi 55 2K 3K 78643K 125 0
ether_multi 1 0K 0K 78643K 14 0
mrt 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 236 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 124 63K 71K 78643K 2198 0
UVM aobj 14 2K 2K 78643K 24 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 85 0
NDP 12 0K 0K 78643K 25 0
temp 89 3038K 3107K 78643K 11839 0
kqueue 3 4K 12K 78643K 36 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 3 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 30 0 28 1 0 1 1 0 8 0
rtentry 112 61 0 30 2 0 2 2 0 8 0
unpcb 120 150 0 138 1 0 1 1 0 8 0
syncache 264 7 0 7 3 2 1 1 0 8 1
sackhl 24 2 0 2 1 1 0 1 0 8 0
tcpqe 32 959 0 959 2 1 1 1 0 8 1
tcpcb 544 158 0 153 1 0 1 1 0 8 0
inpcb 280 665 0 655 5 3 2 2 0 8 1
rttmr 72 3 0 3 2 2 0 1 0 8 0
nd6 48 9 0 8 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 3 0 3 1 1 0 1 0 482 0
pffrnode 88 3 0 3 1 1 0 1 0 8 0
pffrent 40 49 0 49 1 1 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 47 0 24 1 0 1 1 0 8 0
pfstkey 112 47 0 24 1 0 1 1 0 8 0
pfstate 328 47 0 24 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 246 0 117 13 1 12 12 0 8 2
art_table 32 247 0 117 2 0 2 2 0 8 0
art_node 16 60 0 31 1 0 1 1 0 8 0
sysvmsgpl 40 14 0 14 2 2 0 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 34 0 24 1 0 1 1 0 8 0
shmpl 112 22 0 10 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1940 0 537 89 0 89 89 0 8 0
ffsino 272 1940 0 537 95 0 95 95 0 8 0
nchpl 144 2665 0 1075 60 0 60 60 0 8 0
uvmvnodes 72 2086 0 0 38 0 38 38 0 8 0
vnodes 208 2086 0 0 110 0 110 110 0 8 0
namei 1024 7313 0 7313 3 2 1 1 0 8 1
percpumem 16 38 0 7 1 0 1 1 0 8 0
vcpupl 1984 5 0 0 1 0 1 1 0 8 0
vmpool 560 7 0 2 1 0 1 1 0 8 0
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 7327 0 7327 10 9 1 7 0 8 1
plimitpl 152 41 0 34 1 0 1 1 0 8 0
sigapl 424 567 0 536 4 0 4 4 0 8 0
futexpl 56 5979 0 5977 3 2 1 1 0 8 0
knotepl 112 103 0 90 1 0 1 1 0 8 0
kqueuepl 144 72 0 70 1 0 1 1 0 8 0
pipelkpl 48 352 0 344 1 0 1 1 0 8 0
pipepl 120 704 0 689 1 0 1 1 0 8 0
fdescpl 496 551 0 536 3 0 3 3 0 8 0
filepl 152 3804 0 3723 6 1 5 5 0 8 0
lockfpl 104 236 0 235 1 0 1 1 0 8 0
lockfspl 48 65 0 64 1 0 1 1 0 8 0
sessionpl 112 19 0 9 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 294 0 283 1 0 1 1 0 8 0
zombiepl 144 536 0 536 3 2 1 1 0 8 1
processpl 984 567 0 536 6 1 5 5 0 8 0
procpl 624 1402 0 1357 5 1 4 5 0 8 0
sosppl 128 2 0 2 2 2 0 1 0 8 0
sockpl 400 845 0 822 7 4 3 4 0 8 0
mcl64k 65536 264 0 0 33 2 31 33 0 8 1
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 5 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 177 0 0 22 0 22 22 0 8 0
mtagpl 80 27 0 0 1 0 1 1 0 8 0
mbufpl 256 411 0 0 24 0 24 24 0 8 0
bufpl 280 4024 0 135 278 0 278 278 0 8 0
anonpl 16 63149 0 48586 75 15 60 69 0 124 0
amapchunkpl 152 3434 0 3290 21 13 8 20 0 158 0
amappl16 192 2413 0 1623 51 11 40 47 0 8 0
amappl15 184 161 0 158 1 0 1 1 0 8 0
amappl14 176 24 0 20 1 0 1 1 0 8 0
amappl13 168 25 0 24 1 0 1 1 0 8 0
amappl12 160 172 0 169 2 1 1 1 0 8 0
amappl11 152 57 0 42 1 0 1 1 0 8 0
amappl10 144 174 0 170 1 0 1 1 0 8 0
amappl9 136 382 0 380 1 0 1 1 0 8 0
amappl8 128 369 0 331 2 0 2 2 0 8 0
amappl7 120 277 0 264 1 0 1 1 0 8 0
amappl6 112 28 0 23 2 1 1 1 0 8 0
amappl5 104 466 0 447 1 0 1 1 0 8 0
amappl4 96 494 0 463 1 0 1 1 0 8 0
amappl3 88 120 0 114 1 0 1 1 0 8 0
amappl2 80 3633 0 3562 2 0 2 2 0 8 0
amappl1 72 21958 0 21529 23 13 10 18 0 8 0
amappl 80 1655 0 1607 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 23 0 10 1 0 1 1 0 8 0
uaddrrnd 24 558 0 538 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 558 0 538 1 0 1 1 0 8 0
vmmpekpl 168 9084 0 9053 2 0 2 2 0 8 0
vmmpepl 168 73654 0 71761 116 25 91 101 0 357 5
vmsppl 368 557 0 538 2 0 2 2 0 8 0
pdppl 4096 1124 0 1081 7 1 6 7 0 8 0
pvpl 32 211546 0 193912 169 19 150 169 0 265 5
pmappl 232 557 0 538 2 0 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 311 0 14 9 0 9 9 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff82523ff0) 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
__mp_lock(ffffffff8266bfa8) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8266bfa8) at __mp_lock+0x127 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffbbda0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at uvm_map_clean+0x44a: movl 0x48(%r15),%ebx
ddb{1}> trace
uvm_map_clean(fffffd806e954178,c002cca000,c003138000,8) at uvm_map_clean+0x44a sys/uvm/uvm_map.c:4677
syscall(ffff800020f43470) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f43470) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00004feb8, 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: 99490db6 Currently LibreSSL reports an unknown SSL_interna..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=161e4370100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=4557b0d636641e38522b
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+4557b0...@syzkaller.appspotmail.com
uvm_fault(0xffffffff8253edf0, 0xfffffd0000000048, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_map_clean+0x44a: movl 0x48(%r15),%ebx
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel page fault
uvm_fault(0xffffffff8253edf0, 0xfffffd0000000048, 0, 1) -> e
uvm_map_clean(fffffd806e954178,c002cca000,c003138000,8) at uvm_map_clean+0x44a sys/uvm/uvm_map.c:4677
end trace frame: 0xffff800020f43460, count: 0
ddb{1}> trace
uvm_map_clean(fffffd806e954178,c002cca000,c003138000,8) at uvm_map_clean+0x44a sys/uvm/uvm_map.c:4677
syscall(ffff800020f43470) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f43470) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00004feb8, count: -3
ddb{1}> show registers
rdi 0x11
rsi 0x10
rbp 0xffff800020f43390
rbx 0xc002d7c000
rdx 0x7
rcx 0
rax 0xfffffd80650aa000
r8 0xffffffff815a1263 uvm_map_clean+0x483
r9 0x5
r10 0x184c6023d21b710f
r11 0xcfac7ccd6c814b0f
r12 0xc003138000
r13 0xc002d7c000
r14 0xfffffd80650aa000
r15 0xfffffd0000000000
rip 0xffffffff815a122a uvm_map_clean+0x44a
cs 0x8
rflags 0x10286 __ALIGN_SIZE+0xf286
rsp 0xffff800020f432d0
ss 0x10
uvm_map_clean+0x44a: movl 0x48(%r15),%ebx
ddb{1}> show proc
PROC (syz-fuzzer) pid=178812 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=4000000<THREAD>
pri=86, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020ed1d50,0xffff800020e6ceb8
process=0xffff800020ec9728 user=0xffff800020f3e000, vmspace=0xfffffd806e954178
estcpu=1, cpticks=6, pctcpu=0.2
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
81089 175303 79498 0 7 0x10 syz-executor.0
81089 411118 79498 0 3 0x4000090 fifow syz-executor.0
81089 109066 79498 0 3 0x4000090 fsleep syz-executor.0
81089 154319 79498 0 3 0x4000090 fifow syz-executor.0
81089 416687 79498 0 3 0x4000090 fifow syz-executor.0
81089 446265 79498 0 3 0x4000090 fsleep syz-executor.0
16409 36352 1 0 3 0x100083 ttyin getty
39470 387130 0 0 3 0x14200 bored sosplice
79498 234589 33331 0 3 0x82 nanosleep syz-executor.0
33331 99473 61265 0 3 0x82 thrsleep syz-fuzzer
33331 95824 61265 0 3 0x4000082 nanosleep syz-fuzzer
33331 97492 61265 0 3 0x4000082 kqread syz-fuzzer
33331 84567 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 184054 61265 0 3 0x4000082 thrsleep syz-fuzzer
*33331 178812 61265 0 7 0x4000002 syz-fuzzer
33331 385736 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 352873 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 46603 61265 0 3 0x4000082 thrsleep syz-fuzzer
33331 234823 61265 0 3 0x4000082 thrsleep syz-fuzzer
61265 376716 22148 0 3 0x10008a pause ksh
22148 51877 51271 0 3 0x92 select sshd
51271 433487 1 0 3 0x80 select sshd
65066 240054 1625 74 3 0x100092 bpf pflogd
1625 179963 1 0 3 0x80 netio pflogd
21657 139722 48279 73 3 0x100090 kqread syslogd
48279 289533 1 0 3 0x100082 netio syslogd
17495 495008 1 77 3 0x100090 poll dhclient
87304 74984 1 0 3 0x80 poll dhclient
18199 197003 0 0 3 0x14200 bored smr
3164 111320 0 0 2 0x14200 zerothread
23267 53152 0 0 3 0x14200 aiodoned aiodoned
70008 150433 0 0 3 0x14200 syncer update
78367 340052 0 0 3 0x14200 cleaner cleaner
72006 230201 0 0 3 0x14200 reaper reaper
27581 7050 0 0 3 0x14200 pgdaemon pagedaemon
19428 146702 0 0 3 0x14200 bored crynlk
49592 26952 0 0 3 0x14200 bored crypto
8932 251241 0 0 3 0x40014200 acpi0 acpi0
60734 17507 0 0 3 0x40014200 idle1
82160 289644 0 0 3 0x14200 bored softnet
26377 50462 0 0 3 0x14200 bored systqmp
37476 506352 0 0 3 0x14200 bored systq
16121 436710 0 0 3 0x40014200 bored softclock
35097 22269 0 0 3 0x40014200 idle0
1 266331 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 33331 (syz-fuzzer) thread 0xffff800020e6cc38 (178812)
shared rwlock vmmaplk r = 0 (0xfffffd806e954190)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 uvm_map_clean+0xe2 vm_map_lock_read_ln sys/uvm/uvm_map.c:5467 [inline]
#1 uvm_map_clean+0xe2 sys/uvm/uvm_map.c:4628
#2 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#3 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8266c1b0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570
#2 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9523 6425K 6819K 78643K 11119 0
pcb 14 8K 8K 78643K 124 0
rtable 82 3K 4K 78643K 301 0
ifaddr 74 14K 16K 78643K 125 0
counters 41 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1491 0
iov 0 0K 28K 78643K 155 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1385 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 38 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 4 9K 25K 78643K 350 0
sigio 0 0K 0K 78643K 9 0
proc 63 63K 83K 78643K 501 0
subproc 16 1K 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 35 0
in_multi 55 2K 3K 78643K 125 0
ether_multi 1 0K 0K 78643K 14 0
mrt 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 236 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 124 63K 71K 78643K 2198 0
UVM aobj 14 2K 2K 78643K 24 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 85 0
NDP 12 0K 0K 78643K 25 0
temp 89 3038K 3107K 78643K 11839 0
kqueue 3 4K 12K 78643K 36 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 3 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 30 0 28 1 0 1 1 0 8 0
rtentry 112 61 0 30 2 0 2 2 0 8 0
unpcb 120 150 0 138 1 0 1 1 0 8 0
syncache 264 7 0 7 3 2 1 1 0 8 1
sackhl 24 2 0 2 1 1 0 1 0 8 0
tcpqe 32 959 0 959 2 1 1 1 0 8 1
tcpcb 544 158 0 153 1 0 1 1 0 8 0
inpcb 280 665 0 655 5 3 2 2 0 8 1
rttmr 72 3 0 3 2 2 0 1 0 8 0
nd6 48 9 0 8 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 3 0 3 1 1 0 1 0 482 0
pffrnode 88 3 0 3 1 1 0 1 0 8 0
pffrent 40 49 0 49 1 1 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 47 0 24 1 0 1 1 0 8 0
pfstkey 112 47 0 24 1 0 1 1 0 8 0
pfstate 328 47 0 24 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 246 0 117 13 1 12 12 0 8 2
art_table 32 247 0 117 2 0 2 2 0 8 0
art_node 16 60 0 31 1 0 1 1 0 8 0
sysvmsgpl 40 14 0 14 2 2 0 1 0 8 0
semupl 112 4 0 4 1 1 0 1 0 8 0
semapl 112 34 0 24 1 0 1 1 0 8 0
shmpl 112 22 0 10 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1940 0 537 89 0 89 89 0 8 0
ffsino 272 1940 0 537 95 0 95 95 0 8 0
nchpl 144 2665 0 1075 60 0 60 60 0 8 0
uvmvnodes 72 2086 0 0 38 0 38 38 0 8 0
vnodes 208 2086 0 0 110 0 110 110 0 8 0
namei 1024 7313 0 7313 3 2 1 1 0 8 1
percpumem 16 38 0 7 1 0 1 1 0 8 0
vcpupl 1984 5 0 0 1 0 1 1 0 8 0
vmpool 560 7 0 2 1 0 1 1 0 8 0
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 7327 0 7327 10 9 1 7 0 8 1
plimitpl 152 41 0 34 1 0 1 1 0 8 0
sigapl 424 567 0 536 4 0 4 4 0 8 0
futexpl 56 5979 0 5977 3 2 1 1 0 8 0
knotepl 112 103 0 90 1 0 1 1 0 8 0
kqueuepl 144 72 0 70 1 0 1 1 0 8 0
pipelkpl 48 352 0 344 1 0 1 1 0 8 0
pipepl 120 704 0 689 1 0 1 1 0 8 0
fdescpl 496 551 0 536 3 0 3 3 0 8 0
filepl 152 3804 0 3723 6 1 5 5 0 8 0
lockfpl 104 236 0 235 1 0 1 1 0 8 0
lockfspl 48 65 0 64 1 0 1 1 0 8 0
sessionpl 112 19 0 9 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 294 0 283 1 0 1 1 0 8 0
zombiepl 144 536 0 536 3 2 1 1 0 8 1
processpl 984 567 0 536 6 1 5 5 0 8 0
procpl 624 1402 0 1357 5 1 4 5 0 8 0
sosppl 128 2 0 2 2 2 0 1 0 8 0
sockpl 400 845 0 822 7 4 3 4 0 8 0
mcl64k 65536 264 0 0 33 2 31 33 0 8 1
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 5 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 177 0 0 22 0 22 22 0 8 0
mtagpl 80 27 0 0 1 0 1 1 0 8 0
mbufpl 256 411 0 0 24 0 24 24 0 8 0
bufpl 280 4024 0 135 278 0 278 278 0 8 0
anonpl 16 63149 0 48586 75 15 60 69 0 124 0
amapchunkpl 152 3434 0 3290 21 13 8 20 0 158 0
amappl16 192 2413 0 1623 51 11 40 47 0 8 0
amappl15 184 161 0 158 1 0 1 1 0 8 0
amappl14 176 24 0 20 1 0 1 1 0 8 0
amappl13 168 25 0 24 1 0 1 1 0 8 0
amappl12 160 172 0 169 2 1 1 1 0 8 0
amappl11 152 57 0 42 1 0 1 1 0 8 0
amappl10 144 174 0 170 1 0 1 1 0 8 0
amappl9 136 382 0 380 1 0 1 1 0 8 0
amappl8 128 369 0 331 2 0 2 2 0 8 0
amappl7 120 277 0 264 1 0 1 1 0 8 0
amappl6 112 28 0 23 2 1 1 1 0 8 0
amappl5 104 466 0 447 1 0 1 1 0 8 0
amappl4 96 494 0 463 1 0 1 1 0 8 0
amappl3 88 120 0 114 1 0 1 1 0 8 0
amappl2 80 3633 0 3562 2 0 2 2 0 8 0
amappl1 72 21958 0 21529 23 13 10 18 0 8 0
amappl 80 1655 0 1607 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 23 0 10 1 0 1 1 0 8 0
uaddrrnd 24 558 0 538 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 558 0 538 1 0 1 1 0 8 0
vmmpekpl 168 9084 0 9053 2 0 2 2 0 8 0
vmmpepl 168 73654 0 71761 116 25 91 101 0 357 5
vmsppl 368 557 0 538 2 0 2 2 0 8 0
pdppl 4096 1124 0 1081 7 1 6 7 0 8 0
pvpl 32 211546 0 193912 169 19 150 169 0 265 5
pmappl 232 557 0 538 2 0 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 311 0 14 9 0 9 9 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff82523ff0) 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
__mp_lock(ffffffff8266bfa8) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8266bfa8) at __mp_lock+0x127 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffbbda0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at uvm_map_clean+0x44a: movl 0x48(%r15),%ebx
ddb{1}> trace
uvm_map_clean(fffffd806e954178,c002cca000,c003138000,8) at uvm_map_clean+0x44a sys/uvm/uvm_map.c:4677
syscall(ffff800020f43470) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f43470) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00004feb8, count: -3
---
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syzbot
Aug 5, 2020, 12:08:15 PM8/5/20
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.
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