panic: pool_cache_item_magic_cWhAecRNk:I NGm:bu SfpPLl NcOpTu LfOrWeeER ElDi OsNt SmYoSdCiAfLiLe d:LINE 6 i-t2e7m4 AD
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syzbot
Jun 3, 2020, 4:38:18 PM6/3/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: b8f1c15c let the random subsystem read the tsc for event "..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10b5eea6100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=6e39eef3b45e07716bda
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+6e39ee...@syzkaller.appspotmail.com
panic: pool_cache_item_magic_cWhAecRNk:I NGm:bu SfpPLl NcOpTu LfOrWeeER ElDi OsNt SmYoSdCiAfLiLe d:13 6 i-t2e7m4 5a4d4d r EX0IxTf ff0 f9f
d
80Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 14000 96391 0 0x2 0 0 syz-executor.0
328149 15207 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd000, count: 14
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8064b97300+16 0x0!=0xb3b047ca913771f4
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd000, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020f6d8b0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff81c317bf kprintf+0x16f
r9 0x1
r10 0x2
r11 0x74543791166c9180
r12 0
r13 0
r14 0xffff800020e6c758
r15 0
rip 0xffffffff8106d3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020f6d830
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=14000 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6c9c8,0xffff800020ed6028
process=0xffff800020e80010 user=0xffff800020f68000, vmspace=0xfffffd807efffa10
estcpu=36, cpticks=1, pctcpu=0.9
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
97356 60049 67418 0 2 0 syz-executor.1
97356 281789 67418 0 2 0x4000000 syz-executor.1
67418 244864 97008 0 3 0x82 nanosleep syz-executor.1
66115 251513 0 0 3 0x14280 nfsidl nfsio
91112 124162 0 0 3 0x14280 nfsidl nfsio
78614 232818 0 0 3 0x14280 nfsidl nfsio
51039 450481 0 0 3 0x14280 nfsidl nfsio
64585 369574 0 0 3 0x14280 nfsidl nfsio
20781 210698 0 0 3 0x14280 nfsidl nfsio
86353 92562 0 0 3 0x14280 nfsidl nfsio
81959 398030 0 0 3 0x14280 nfsidl nfsio
92328 225944 0 0 3 0x14280 nfsidl nfsio
15182 258921 0 0 3 0x14280 nfsidl nfsio
81127 227329 0 0 3 0x14280 nfsidl nfsio
2331 100408 0 0 3 0x14280 nfsidl nfsio
56946 339189 0 0 3 0x14280 nfsidl nfsio
44084 388993 0 0 3 0x14280 nfsidl nfsio
792 108302 0 0 3 0x14280 nfsidl nfsio
84935 461246 0 0 3 0x14280 nfsidl nfsio
83943 246145 0 0 3 0x14280 nfsidl nfsio
51885 323277 0 0 3 0x14280 nfsidl nfsio
51382 188785 0 0 3 0x14280 nfsidl nfsio
19451 181690 0 0 3 0x14280 nfsidl nfsio
65903 115503 0 0 3 0x14200 bored sosplice
*96391 14000 97008 0 7 0x2 syz-executor.0
97008 413940 35517 0 3 0x82 thrsleep syz-fuzzer
97008 16425 35517 0 3 0x4000082 nanosleep syz-fuzzer
97008 282350 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 275651 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 272062 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 510795 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 444915 35517 0 3 0x4000082 nanosleep syz-fuzzer
97008 289250 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 143659 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 126168 35517 0 3 0x4000082 kqread syz-fuzzer
35517 423283 15207 0 3 0x10008a pause ksh
15207 328149 26604 0 7 0x12 sshd
79591 81322 1 0 3 0x100083 ttyin getty
26604 337734 1 0 3 0x80 select sshd
67284 176150 34801 74 3 0x100092 bpf pflogd
34801 492794 1 0 3 0x80 netio pflogd
67379 495280 48014 73 3 0x100090 kqread syslogd
48014 511034 1 0 3 0x100082 netio syslogd
80931 463494 1 77 3 0x100090 poll dhclient
51130 463636 1 0 3 0x80 poll dhclient
5722 204129 0 0 3 0x14200 bored smr
85531 37461 0 0 2 0x14200 zerothread
93346 78289 0 0 3 0x14200 aiodoned aiodoned
21502 442959 0 0 3 0x14200 syncer update
29088 29533 0 0 3 0x14200 cleaner cleaner
87391 218772 0 0 3 0x14200 reaper reaper
23395 508776 0 0 3 0x14200 pgdaemon pagedaemon
17831 232912 0 0 3 0x14200 bored crynlk
39839 449120 0 0 3 0x14200 bored crypto
99837 444020 0 0 3 0x40014200 acpi0 acpi0
2403 143467 0 0 3 0x40014200 idle1
68696 217215 0 0 3 0x14200 bored softnet
45134 287581 0 0 3 0x14200 bored systqmp
85490 265538 0 0 3 0x14200 bored systq
90084 259157 0 0 3 0x40014200 bored softclock
208 267949 0 0 3 0x40014200 idle0
1 268219 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_iopool_run+0x30 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_iopool_run+0x30 sys/scsi/scsi_base.c:417
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#9 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#10 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#11 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#12 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#13 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 96391 (syz-executor.0) thread 0xffff800020e6c758 (14000)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82686420)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ufs_mkdir+0x42e sys/ufs/ufs/ufs_vnops.c:1197
#10 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80693b6f80)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b312b38)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_iopool_run+0x30 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_iopool_run+0x30 sys/scsi/scsi_base.c:417
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#9 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#10 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#11 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#12 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#13 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 15207 (sshd) thread 0xffff800020ede280 (328149)
exclusive rwlock netlock r = 0 (0xffffffff82496048)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9551 6561K 7267K 78643K 12242 0
pcb 13 8K 8K 78643K 99 0
rtable 111 12K 12K 78643K 335 0
ifaddr 92 17K 17K 78643K 152 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 59 0
ioctlops 0 0K 4K 78643K 1486 0
iov 0 0K 28K 78643K 333 0
mount 1 1K 1K 78643K 1 0
vnodes 1230 77K 78K 78643K 1682 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 6 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 22 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 511 0
sigio 0 0K 0K 78643K 4 0
proc 63 63K 95K 78643K 519 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 37 0
in_multi 71 3K 3K 78643K 130 0
ether_multi 1 0K 0K 78643K 22 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 253 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 122 39K 53K 78643K 2506 0
UVM aobj 12 2K 2K 78643K 12 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 83 0
NDP 15 0K 0K 78643K 29 0
temp 114 3035K 3102K 78643K 11164 0
kqueue 3 4K 12K 78643K 17 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 10 0 4 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 47 0 45 1 0 1 1 0 8 0
rtentry 112 62 0 18 2 0 2 2 0 8 0
unpcb 120 485 0 475 1 0 1 1 0 8 0
syncache 264 6 0 6 2 2 0 1 0 8 0
tcpqe 32 89 0 89 2 2 0 1 0 8 0
tcpcb 544 168 0 164 1 0 1 1 0 8 0
inpcb 280 491 0 484 2 1 1 2 0 8 0
nd6 48 11 0 5 1 0 1 1 0 8 0
ppxss 1128 5 0 5 2 2 0 1 0 8 0
pfstscr 40 4 0 4 1 1 0 1 0 8 0
pffrag 232 2 0 2 1 1 0 1 0 482 0
pffrnode 88 2 0 2 1 1 0 1 0 8 0
pffrent 40 92 0 92 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 49 0 15 1 0 1 1 0 8 0
pfstkey 112 51 0 17 2 0 2 2 0 8 0
pfstate 328 49 0 15 4 0 4 4 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 256 265 0 74 14 1 13 13 0 8 1
art_table 32 266 0 74 2 0 2 2 0 8 0
art_node 16 61 0 21 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 1 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 10 0 0 1 0 1 1 0 8 0
shmpl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2080 0 676 89 0 89 89 0 8 0
ffsino 272 2080 0 676 95 0 95 95 0 8 0
nchpl 144 3071 0 1477 60 0 60 60 0 8 0
uvmvnodes 72 2516 0 0 46 0 46 46 0 8 0
vnodes 208 2516 0 0 133 0 133 133 0 8 0
namei 1024 8431 0 8431 2 1 1 1 0 8 1
percpumem 16 40 0 8 1 0 1 1 0 8 0
vcpupl 1984 1 0 0 1 0 1 1 0 8 0
vmpool 560 5 0 4 2 1 1 1 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 8089 0 8089 8 7 1 7 0 8 1
plimitpl 152 40 0 32 1 0 1 1 0 8 0
sigapl 424 745 0 693 7 1 6 7 0 8 0
futexpl 56 6973 0 6973 1 0 1 1 0 8 1
knotepl 112 90 0 71 1 0 1 1 0 8 0
kqueuepl 144 73 0 71 1 0 1 1 0 8 0
pipelkpl 48 127 0 117 1 0 1 1 0 8 0
pipepl 120 254 0 235 1 0 1 1 0 8 0
fdescpl 496 708 0 692 3 0 3 3 0 8 0
filepl 152 4138 0 4038 5 0 5 5 0 8 1
lockfpl 104 103 0 102 1 0 1 1 0 8 0
lockfspl 48 43 0 42 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 25 0 14 1 0 1 1 0 8 0
ucredpl 96 377 0 368 1 0 1 1 0 8 0
zombiepl 144 693 0 693 2 1 1 1 0 8 1
processpl 984 745 0 693 7 0 7 7 0 8 0
procpl 624 1701 0 1639 6 0 6 6 0 8 1
sosppl 128 4 0 4 2 2 0 1 0 8 0
sockpl 400 1023 0 1004 5 2 3 4 0 8 1
mcl64k 65536 257 0 0 33 3 30 33 0 8 1
mcl12k 12288 9 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 6 0 0 1 0 1 1 0 8 0
mcl2k2 2112 4 0 0 1 0 1 1 0 8 0
mcl2k 2048 181 0 0 22 0 22 22 0 8 0
mtagpl 80 152 0 0 4 0 4 4 0 8 0
mbufpl 256 631 0 0 38 0 38 38 0 8 0
bufpl 280 4107 0 135 284 0 284 284 0 8 0
anonpl 16 77795 0 63791 78 15 63 76 0 124 1
amapchunkpl 152 3712 0 3578 14 8 6 13 0 158 0
amappl16 192 3196 0 2366 66 19 47 54 0 8 5
amappl15 184 32 0 29 1 0 1 1 0 8 0
amappl14 176 276 0 272 1 0 1 1 0 8 0
amappl13 168 35 0 32 1 0 1 1 0 8 0
amappl12 160 6 0 4 2 1 1 1 0 8 0
amappl11 152 90 0 73 1 0 1 1 0 8 0
amappl10 144 18 0 13 1 0 1 1 0 8 0
amappl9 136 572 0 570 1 0 1 1 0 8 0
amappl8 128 532 0 501 1 0 1 1 0 8 0
amappl7 120 126 0 112 1 0 1 1 0 8 0
amappl6 112 30 0 25 2 1 1 1 0 8 0
amappl5 104 574 0 556 1 0 1 1 0 8 0
amappl4 96 507 0 476 1 0 1 1 0 8 0
amappl3 88 340 0 334 1 0 1 1 0 8 0
amappl2 80 4341 0 4266 2 0 2 2 0 8 0
amappl1 72 24538 0 24096 23 13 10 18 0 8 0
amappl 80 1949 0 1904 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 11 0 0 1 0 1 1 0 8 0
uaddrrnd 24 713 0 696 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 713 0 696 1 0 1 1 0 8 0
vmmpekpl 168 9025 0 8986 2 0 2 2 0 8 0
vmmpepl 168 91360 0 89364 144 32 112 120 0 357 19
vmsppl 368 712 0 696 2 0 2 2 0 8 0
pdppl 4096 1434 0 1393 6 0 6 6 0 8 0
pvpl 32 239583 0 222378 183 23 160 183 0 265 9
pmappl 232 712 0 696 3 1 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 323 0 10 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd000, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) 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
x86_bus_space_io_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,30) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,30) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(30) at cnputc+0x4c sys/dev/cons.c:239
kputchar(30,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff821fe91c) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fe91c) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82666280,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb38c88,9,fffffd8064b96d00,0,0,ffff800020ede280) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e91370, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) 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
x86_bus_space_io_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,30) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,30) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(30) at cnputc+0x4c sys/dev/cons.c:239
kputchar(30,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff821fe91c) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fe91c) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82666280,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb38c88,9,fffffd8064b96d00,0,0,ffff800020ede280) at tcp_usrreq+0xa55
sosend(fffffd806eb38c88,0,ffff800020e91438,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ede280,4,ffff800020e91438,0,ffff800020e91520) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ede280,ffff800020e914d0,ffff800020e91520) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e915a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e915a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffbe320, count: -19
---
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: b8f1c15c let the random subsystem read the tsc for event "..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10b5eea6100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=6e39eef3b45e07716bda
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+6e39ee...@syzkaller.appspotmail.com
panic: pool_cache_item_magic_cWhAecRNk:I NGm:bu SfpPLl NcOpTu LfOrWeeER ElDi OsNt SmYoSdCiAfLiLe d:13 6 i-t2e7m4 5a4d4d r EX0IxTf ff0 f9f
d
80Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 14000 96391 0 0x2 0 0 syz-executor.0
328149 15207 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd000, count: 14
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8064b97300+16 0x0!=0xb3b047ca913771f4
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd000, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020f6d8b0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff81c317bf kprintf+0x16f
r9 0x1
r10 0x2
r11 0x74543791166c9180
r12 0
r13 0
r14 0xffff800020e6c758
r15 0
rip 0xffffffff8106d3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020f6d830
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=14000 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6c9c8,0xffff800020ed6028
process=0xffff800020e80010 user=0xffff800020f68000, vmspace=0xfffffd807efffa10
estcpu=36, cpticks=1, pctcpu=0.9
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
97356 60049 67418 0 2 0 syz-executor.1
97356 281789 67418 0 2 0x4000000 syz-executor.1
67418 244864 97008 0 3 0x82 nanosleep syz-executor.1
66115 251513 0 0 3 0x14280 nfsidl nfsio
91112 124162 0 0 3 0x14280 nfsidl nfsio
78614 232818 0 0 3 0x14280 nfsidl nfsio
51039 450481 0 0 3 0x14280 nfsidl nfsio
64585 369574 0 0 3 0x14280 nfsidl nfsio
20781 210698 0 0 3 0x14280 nfsidl nfsio
86353 92562 0 0 3 0x14280 nfsidl nfsio
81959 398030 0 0 3 0x14280 nfsidl nfsio
92328 225944 0 0 3 0x14280 nfsidl nfsio
15182 258921 0 0 3 0x14280 nfsidl nfsio
81127 227329 0 0 3 0x14280 nfsidl nfsio
2331 100408 0 0 3 0x14280 nfsidl nfsio
56946 339189 0 0 3 0x14280 nfsidl nfsio
44084 388993 0 0 3 0x14280 nfsidl nfsio
792 108302 0 0 3 0x14280 nfsidl nfsio
84935 461246 0 0 3 0x14280 nfsidl nfsio
83943 246145 0 0 3 0x14280 nfsidl nfsio
51885 323277 0 0 3 0x14280 nfsidl nfsio
51382 188785 0 0 3 0x14280 nfsidl nfsio
19451 181690 0 0 3 0x14280 nfsidl nfsio
65903 115503 0 0 3 0x14200 bored sosplice
*96391 14000 97008 0 7 0x2 syz-executor.0
97008 413940 35517 0 3 0x82 thrsleep syz-fuzzer
97008 16425 35517 0 3 0x4000082 nanosleep syz-fuzzer
97008 282350 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 275651 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 272062 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 510795 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 444915 35517 0 3 0x4000082 nanosleep syz-fuzzer
97008 289250 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 143659 35517 0 3 0x4000082 thrsleep syz-fuzzer
97008 126168 35517 0 3 0x4000082 kqread syz-fuzzer
35517 423283 15207 0 3 0x10008a pause ksh
15207 328149 26604 0 7 0x12 sshd
79591 81322 1 0 3 0x100083 ttyin getty
26604 337734 1 0 3 0x80 select sshd
67284 176150 34801 74 3 0x100092 bpf pflogd
34801 492794 1 0 3 0x80 netio pflogd
67379 495280 48014 73 3 0x100090 kqread syslogd
48014 511034 1 0 3 0x100082 netio syslogd
80931 463494 1 77 3 0x100090 poll dhclient
51130 463636 1 0 3 0x80 poll dhclient
5722 204129 0 0 3 0x14200 bored smr
85531 37461 0 0 2 0x14200 zerothread
93346 78289 0 0 3 0x14200 aiodoned aiodoned
21502 442959 0 0 3 0x14200 syncer update
29088 29533 0 0 3 0x14200 cleaner cleaner
87391 218772 0 0 3 0x14200 reaper reaper
23395 508776 0 0 3 0x14200 pgdaemon pagedaemon
17831 232912 0 0 3 0x14200 bored crynlk
39839 449120 0 0 3 0x14200 bored crypto
99837 444020 0 0 3 0x40014200 acpi0 acpi0
2403 143467 0 0 3 0x40014200 idle1
68696 217215 0 0 3 0x14200 bored softnet
45134 287581 0 0 3 0x14200 bored systqmp
85490 265538 0 0 3 0x14200 bored systq
90084 259157 0 0 3 0x40014200 bored softclock
208 267949 0 0 3 0x40014200 idle0
1 268219 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_iopool_run+0x30 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_iopool_run+0x30 sys/scsi/scsi_base.c:417
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#9 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#10 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#11 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#12 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#13 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 96391 (syz-executor.0) thread 0xffff800020e6c758 (14000)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82686420)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ufs_mkdir+0x42e sys/ufs/ufs/ufs_vnops.c:1197
#10 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80693b6f80)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b312b38)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_iopool_run+0x30 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_iopool_run+0x30 sys/scsi/scsi_base.c:417
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#9 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#10 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#11 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#12 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#13 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 15207 (sshd) thread 0xffff800020ede280 (328149)
exclusive rwlock netlock r = 0 (0xffffffff82496048)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9551 6561K 7267K 78643K 12242 0
pcb 13 8K 8K 78643K 99 0
rtable 111 12K 12K 78643K 335 0
ifaddr 92 17K 17K 78643K 152 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 59 0
ioctlops 0 0K 4K 78643K 1486 0
iov 0 0K 28K 78643K 333 0
mount 1 1K 1K 78643K 1 0
vnodes 1230 77K 78K 78643K 1682 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 6 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 22 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 511 0
sigio 0 0K 0K 78643K 4 0
proc 63 63K 95K 78643K 519 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 37 0
in_multi 71 3K 3K 78643K 130 0
ether_multi 1 0K 0K 78643K 22 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 253 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 122 39K 53K 78643K 2506 0
UVM aobj 12 2K 2K 78643K 12 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 83 0
NDP 15 0K 0K 78643K 29 0
temp 114 3035K 3102K 78643K 11164 0
kqueue 3 4K 12K 78643K 17 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 10 0 4 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 47 0 45 1 0 1 1 0 8 0
rtentry 112 62 0 18 2 0 2 2 0 8 0
unpcb 120 485 0 475 1 0 1 1 0 8 0
syncache 264 6 0 6 2 2 0 1 0 8 0
tcpqe 32 89 0 89 2 2 0 1 0 8 0
tcpcb 544 168 0 164 1 0 1 1 0 8 0
inpcb 280 491 0 484 2 1 1 2 0 8 0
nd6 48 11 0 5 1 0 1 1 0 8 0
ppxss 1128 5 0 5 2 2 0 1 0 8 0
pfstscr 40 4 0 4 1 1 0 1 0 8 0
pffrag 232 2 0 2 1 1 0 1 0 482 0
pffrnode 88 2 0 2 1 1 0 1 0 8 0
pffrent 40 92 0 92 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 49 0 15 1 0 1 1 0 8 0
pfstkey 112 51 0 17 2 0 2 2 0 8 0
pfstate 328 49 0 15 4 0 4 4 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 256 265 0 74 14 1 13 13 0 8 1
art_table 32 266 0 74 2 0 2 2 0 8 0
art_node 16 61 0 21 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 1 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 10 0 0 1 0 1 1 0 8 0
shmpl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2080 0 676 89 0 89 89 0 8 0
ffsino 272 2080 0 676 95 0 95 95 0 8 0
nchpl 144 3071 0 1477 60 0 60 60 0 8 0
uvmvnodes 72 2516 0 0 46 0 46 46 0 8 0
vnodes 208 2516 0 0 133 0 133 133 0 8 0
namei 1024 8431 0 8431 2 1 1 1 0 8 1
percpumem 16 40 0 8 1 0 1 1 0 8 0
vcpupl 1984 1 0 0 1 0 1 1 0 8 0
vmpool 560 5 0 4 2 1 1 1 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 8089 0 8089 8 7 1 7 0 8 1
plimitpl 152 40 0 32 1 0 1 1 0 8 0
sigapl 424 745 0 693 7 1 6 7 0 8 0
futexpl 56 6973 0 6973 1 0 1 1 0 8 1
knotepl 112 90 0 71 1 0 1 1 0 8 0
kqueuepl 144 73 0 71 1 0 1 1 0 8 0
pipelkpl 48 127 0 117 1 0 1 1 0 8 0
pipepl 120 254 0 235 1 0 1 1 0 8 0
fdescpl 496 708 0 692 3 0 3 3 0 8 0
filepl 152 4138 0 4038 5 0 5 5 0 8 1
lockfpl 104 103 0 102 1 0 1 1 0 8 0
lockfspl 48 43 0 42 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 25 0 14 1 0 1 1 0 8 0
ucredpl 96 377 0 368 1 0 1 1 0 8 0
zombiepl 144 693 0 693 2 1 1 1 0 8 1
processpl 984 745 0 693 7 0 7 7 0 8 0
procpl 624 1701 0 1639 6 0 6 6 0 8 1
sosppl 128 4 0 4 2 2 0 1 0 8 0
sockpl 400 1023 0 1004 5 2 3 4 0 8 1
mcl64k 65536 257 0 0 33 3 30 33 0 8 1
mcl12k 12288 9 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 6 0 0 1 0 1 1 0 8 0
mcl2k2 2112 4 0 0 1 0 1 1 0 8 0
mcl2k 2048 181 0 0 22 0 22 22 0 8 0
mtagpl 80 152 0 0 4 0 4 4 0 8 0
mbufpl 256 631 0 0 38 0 38 38 0 8 0
bufpl 280 4107 0 135 284 0 284 284 0 8 0
anonpl 16 77795 0 63791 78 15 63 76 0 124 1
amapchunkpl 152 3712 0 3578 14 8 6 13 0 158 0
amappl16 192 3196 0 2366 66 19 47 54 0 8 5
amappl15 184 32 0 29 1 0 1 1 0 8 0
amappl14 176 276 0 272 1 0 1 1 0 8 0
amappl13 168 35 0 32 1 0 1 1 0 8 0
amappl12 160 6 0 4 2 1 1 1 0 8 0
amappl11 152 90 0 73 1 0 1 1 0 8 0
amappl10 144 18 0 13 1 0 1 1 0 8 0
amappl9 136 572 0 570 1 0 1 1 0 8 0
amappl8 128 532 0 501 1 0 1 1 0 8 0
amappl7 120 126 0 112 1 0 1 1 0 8 0
amappl6 112 30 0 25 2 1 1 1 0 8 0
amappl5 104 574 0 556 1 0 1 1 0 8 0
amappl4 96 507 0 476 1 0 1 1 0 8 0
amappl3 88 340 0 334 1 0 1 1 0 8 0
amappl2 80 4341 0 4266 2 0 2 2 0 8 0
amappl1 72 24538 0 24096 23 13 10 18 0 8 0
amappl 80 1949 0 1904 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 11 0 0 1 0 1 1 0 8 0
uaddrrnd 24 713 0 696 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 713 0 696 1 0 1 1 0 8 0
vmmpekpl 168 9025 0 8986 2 0 2 2 0 8 0
vmmpepl 168 91360 0 89364 144 32 112 120 0 357 19
vmsppl 368 712 0 696 2 0 2 2 0 8 0
pdppl 4096 1434 0 1393 6 0 6 6 0 8 0
pvpl 32 239583 0 222378 183 23 160 183 0 265 9
pmappl 232 712 0 696 3 1 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 323 0 10 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd000, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) 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
x86_bus_space_io_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,30) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,30) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(30) at cnputc+0x4c sys/dev/cons.c:239
kputchar(30,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff821fe91c) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fe91c) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82666280,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb38c88,9,fffffd8064b96d00,0,0,ffff800020ede280) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e91370, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) 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
x86_bus_space_io_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,30) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,30) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(30) at cnputc+0x4c sys/dev/cons.c:239
kputchar(30,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff821fe91c) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fe91c) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82666280) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82666280,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b96300,28c,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b100) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb38c88,9,fffffd8064b96d00,0,0,ffff800020ede280) at tcp_usrreq+0xa55
sosend(fffffd806eb38c88,0,ffff800020e91438,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ede280,4,ffff800020e91438,0,ffff800020e91520) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ede280,ffff800020e914d0,ffff800020e91520) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e915a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e915a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffbe320, count: -19
---
This bug is generated by a bot. It may contain errors.
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Anton Lindqvist
Jun 4, 2020, 2:13:45 AM6/4/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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