panicW: ARpNooINl_G:ca ScPhLe _NiOtTe LmO_mWaERgEicD _OchNe ScYkS: CmAbLufL p2l 1c2pu86 f70re08e6 0li EsXtI Tmo 0d aif
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syzbot
May 15, 2020, 5:49:15 PM5/15/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 435df798 drm/amdgpu: Change VCE booting with firmware load..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15202402100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=7ecad1739b325908e1d7
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+7ecad1...@syzkaller.appspotmail.com
panicW: ARpNooINl_G:ca ScPhLe _NiOtTe LmO_mWaERgEicD _OchNe ScYkS: CmAbLufL p2l 1c2pu86 f70re08e6 0li EsXtI Tmo 0d aif
i
eStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*260304 52020 0 0x2 0 0 syz-executor.1
166593 45183 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3b50, 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 0xfffffd806f175e00+24 0x7867c85e7bbfb90f!=0x7867c8de04be430f
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3b50, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800023189300
rbx 0
rdx 0xffff800020e6dad8
rcx 0
rax 0x3a
r8 0xffffffff81f249ff kprintf+0x16f
r9 0x1
r10 0x25
r11 0x3c937e49f4529919
r12 0
r13 0
r14 0xffff800020e6dad8
r15 0
rip 0xffffffff811db3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800023189280
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=260304 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=81, usrpri=81, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020e6c9d8
process=0xffff800020ec9b00 user=0xffff800023184000, vmspace=0xfffffd807f0002e0
estcpu=36, cpticks=2, pctcpu=0.21
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
87473 263912 52020 0 2 0 syz-executor.1
20319 491657 0 0 3 0x14200 bored sosplice
98276 98460 0 0 3 0x14200 acct acct
34091 90610 33015 0 3 0x2 biowait syz-executor.0
*52020 260304 33015 0 7 0x2 syz-executor.1
33015 134936 51682 0 3 0x82 thrsleep syz-fuzzer
33015 388806 51682 0 3 0x4000082 nanosleep syz-fuzzer
33015 338076 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 201373 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 212832 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 354755 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 149090 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 354128 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 262033 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 302728 51682 0 3 0x4000082 kqread syz-fuzzer
51682 392547 45183 0 3 0x10008a pause ksh
45183 166593 59867 0 7 0x12 sshd
33978 178524 1 0 3 0x100083 ttyin getty
59867 387122 1 0 3 0x80 select sshd
25384 341790 78481 74 3 0x100092 bpf pflogd
78481 76677 1 0 3 0x80 netio pflogd
85771 446130 25642 73 3 0x100090 kqread syslogd
25642 379814 1 0 3 0x100082 netio syslogd
20190 75084 1 77 3 0x100090 poll dhclient
53204 242965 1 0 3 0x80 poll dhclient
58423 165949 0 0 3 0x14200 bored smr
93986 296022 0 0 3 0x14200 pgzero zerothread
35567 116304 0 0 3 0x14200 aiodoned aiodoned
88474 302636 0 0 3 0x14200 syncer update
83892 357281 0 0 3 0x14200 cleaner cleaner
64951 153488 0 0 3 0x14200 reaper reaper
20245 371490 0 0 3 0x14200 pgdaemon pagedaemon
53446 426007 0 0 3 0x14200 bored crynlk
47116 35316 0 0 3 0x14200 bored crypto
54586 417751 0 0 3 0x40014200 acpi0 acpi0
55238 391535 0 0 3 0x40014200 idle1
89210 249204 0 0 3 0x14200 bored softnet
63989 123445 0 0 3 0x14200 bored systqmp
45903 145155 0 0 3 0x14200 bored systq
87761 254229 0 0 3 0x40014200 bored softclock
56646 38939 0 0 3 0x40014200 idle0
1 234850 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8267a578)
#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 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:941
#4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7 fork1+0x271 sys/kern/kern_fork.c:365
#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
Process 34091 (syz-executor.0) thread 0xffff800020e6c9c8 (90610)
exclusive rrwlock inode r = 0 (0xfffffd807d04f3d0)
#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 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b361918)
#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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#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
Process 52020 (syz-executor.1) thread 0xffff800020e6dad8 (260304)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82667e30)
#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
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8267a578)
#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 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:941
#4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7 fork1+0x271 sys/kern/kern_fork.c:365
#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
Process 45183 (sshd) thread 0xffff800020ede010 (166593)
exclusive rwlock netlock r = 0 (0xffffffff824c3998)
#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 9513 6483K 6806K 78643K 11040 0
pcb 13 8K 8K 78643K 135 0
rtable 74 2K 3K 78643K 339 0
ifaddr 73 15K 15K 78643K 98 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1479 0
iov 0 0K 16K 78643K 45 0
mount 1 1K 1K 78643K 1 0
vnodes 1218 77K 77K 78643K 1398 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 7 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 75 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 364 0
proc 61 63K 83K 78643K 510 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 51 0
in_multi 84 4K 4K 78643K 164 0
ether_multi 1 0K 0K 78643K 18 0
mrt 0 0K 0K 78643K 9 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 264 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 129 39K 55K 78643K 2121 0
UVM aobj 16 2K 2K 78643K 18 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 79 0
NDP 10 0K 0K 78643K 20 0
temp 93 3042K 3110K 78643K 3491 0
kqueue 3 4K 10K 78643K 10 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 37 0 35 1 0 1 1 0 8 0
rtentry 112 72 0 45 2 0 2 2 0 8 0
unpcb 120 161 0 151 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 426 0 426 1 1 0 1 0 8 0
tcpcb 544 171 0 167 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 2 0 2 1 1 0 1 0 8 0
inpcb 280 559 0 552 3 1 2 2 0 8 1
rttmr 72 4 0 4 1 0 1 1 0 8 1
nd6 48 11 0 9 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 1 1 1 0 8 1
pffrag 232 3 0 2 1 0 1 1 0 482 0
pffrnode 88 3 0 2 1 0 1 1 0 8 0
pffrent 40 50 0 49 1 0 1 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 41 0 11 1 0 1 1 0 8 0
pfstkey 112 41 0 11 1 0 1 1 0 8 0
pfstate 328 41 0 11 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 256 418 0 292 13 4 9 12 0 8 0
art_table 32 419 0 292 2 0 2 2 0 8 0
art_node 16 71 0 46 1 0 1 1 0 8 0
sysvmsgpl 40 27 0 20 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 67 0 57 1 0 1 1 0 8 0
shmpl 112 16 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1857 0 452 89 0 89 89 0 8 0
ffsino 272 1857 0 452 94 0 94 94 0 8 0
nchpl 144 2747 0 1153 60 0 60 60 0 8 0
uvmvnodes 72 2024 0 0 37 0 37 37 0 8 0
vnodes 208 2024 0 0 107 0 107 107 0 8 0
namei 1024 7471 0 7471 2 1 1 1 0 8 1
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 1 0 0 1 0 1 1 0 8 0
vmpool 560 3 0 2 1 0 1 1 0 8 0
scxspl 192 6997 0 6995 10 9 1 7 0 8 0
plimitpl 152 45 0 37 1 0 1 1 0 8 0
sigapl 424 578 0 545 4 0 4 4 0 8 0
futexpl 56 5487 0 5487 2 1 1 1 0 8 1
knotepl 112 82 0 63 1 0 1 1 0 8 0
kqueuepl 144 22 0 20 1 0 1 1 0 8 0
pipelkpl 48 126 0 116 1 0 1 1 0 8 0
pipepl 120 252 0 233 1 0 1 1 0 8 0
fdescpl 496 561 0 545 3 0 3 3 0 8 0
filepl 152 3560 0 3460 5 0 5 5 0 8 1
lockfpl 104 93 0 92 1 0 1 1 0 8 0
lockfspl 48 35 0 34 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 21 0 10 1 0 1 1 0 8 0
ucredpl 96 357 0 348 1 0 1 1 0 8 0
zombiepl 144 545 0 545 2 1 1 1 0 8 1
processpl 984 578 0 545 6 1 5 5 0 8 0
procpl 624 1296 0 1254 4 0 4 4 0 8 0
sockpl 400 764 0 745 5 2 3 3 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 12 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 215 0 0 26 0 26 26 0 8 0
mtagpl 80 19 0 0 1 0 1 1 0 8 0
mbufpl 256 284 0 0 15 0 15 15 0 8 0
bufpl 280 4032 0 134 279 0 279 279 0 8 0
anonpl 16 68572 0 54644 78 21 57 71 0 124 0
amapchunkpl 152 4120 0 3991 23 6 17 20 0 158 11
amappl16 192 2691 0 1946 53 15 38 48 0 8 0
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 33 0 28 1 0 1 1 0 8 0
amappl13 168 31 0 30 1 0 1 1 0 8 0
amappl12 160 9 0 4 2 1 1 1 0 8 0
amappl11 152 186 0 170 1 0 1 1 0 8 0
amappl10 144 21 0 14 1 0 1 1 0 8 0
amappl9 136 535 0 532 1 0 1 1 0 8 0
amappl8 128 541 0 501 2 0 2 2 0 8 0
amappl7 120 132 0 120 1 0 1 1 0 8 0
amappl6 112 153 0 151 1 0 1 1 0 8 0
amappl5 104 338 0 323 1 0 1 1 0 8 0
amappl4 96 632 0 601 1 0 1 1 0 8 0
amappl3 88 111 0 105 1 0 1 1 0 8 0
amappl2 80 3448 0 3388 2 0 2 2 0 8 0
amappl1 72 22543 0 22119 24 14 10 18 0 8 0
amappl 80 1559 0 1517 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 17 0 2 1 0 1 1 0 8 0
uaddrrnd 24 564 0 547 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 564 0 547 1 0 1 1 0 8 0
vmmpekpl 168 8203 0 8166 2 0 2 2 0 8 0
vmmpepl 168 75070 0 73202 128 33 95 109 0 357 11
vmsppl 368 563 0 547 2 0 2 2 0 8 0
pdppl 4096 1136 0 1095 6 0 6 6 0 8 0
pvpl 32 215286 0 198269 179 25 154 170 0 265 15
pmappl 232 563 0 547 3 1 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 270 0 10 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3b50, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,65) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(65) at cnputc+0x4c sys/dev/cons.c:239
kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fc689) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fc689) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82692510,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb39c88,9,fffffd807f01fb00,0,0,ffff800020ede010) at tcp_usrreq+0xa55
end trace frame: 0xffff800020ecf270, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,65) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(65) at cnputc+0x4c sys/dev/cons.c:239
kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fc689) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fc689) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82692510,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb39c88,9,fffffd807f01fb00,0,0,ffff800020ede010) at tcp_usrreq+0xa55
sosend(fffffd806eb39c88,0,ffff800020ecf338,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ede010,4,ffff800020ecf338,0,ffff800020ecf420) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ede010,ffff800020ecf3d0,ffff800020ecf420) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020ecf4a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ecf4a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd7eb0, 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: 435df798 drm/amdgpu: Change VCE booting with firmware load..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15202402100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=7ecad1739b325908e1d7
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+7ecad1...@syzkaller.appspotmail.com
panicW: ARpNooINl_G:ca ScPhLe _NiOtTe LmO_mWaERgEicD _OchNe ScYkS: CmAbLufL p2l 1c2pu86 f70re08e6 0li EsXtI Tmo 0d aif
i
eStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*260304 52020 0 0x2 0 0 syz-executor.1
166593 45183 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3b50, 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 0xfffffd806f175e00+24 0x7867c85e7bbfb90f!=0x7867c8de04be430f
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3b50, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800023189300
rbx 0
rdx 0xffff800020e6dad8
rcx 0
rax 0x3a
r8 0xffffffff81f249ff kprintf+0x16f
r9 0x1
r10 0x25
r11 0x3c937e49f4529919
r12 0
r13 0
r14 0xffff800020e6dad8
r15 0
rip 0xffffffff811db3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800023189280
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=260304 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=81, usrpri=81, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020e6c9d8
process=0xffff800020ec9b00 user=0xffff800023184000, vmspace=0xfffffd807f0002e0
estcpu=36, cpticks=2, pctcpu=0.21
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
87473 263912 52020 0 2 0 syz-executor.1
20319 491657 0 0 3 0x14200 bored sosplice
98276 98460 0 0 3 0x14200 acct acct
34091 90610 33015 0 3 0x2 biowait syz-executor.0
*52020 260304 33015 0 7 0x2 syz-executor.1
33015 134936 51682 0 3 0x82 thrsleep syz-fuzzer
33015 388806 51682 0 3 0x4000082 nanosleep syz-fuzzer
33015 338076 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 201373 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 212832 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 354755 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 149090 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 354128 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 262033 51682 0 3 0x4000082 thrsleep syz-fuzzer
33015 302728 51682 0 3 0x4000082 kqread syz-fuzzer
51682 392547 45183 0 3 0x10008a pause ksh
45183 166593 59867 0 7 0x12 sshd
33978 178524 1 0 3 0x100083 ttyin getty
59867 387122 1 0 3 0x80 select sshd
25384 341790 78481 74 3 0x100092 bpf pflogd
78481 76677 1 0 3 0x80 netio pflogd
85771 446130 25642 73 3 0x100090 kqread syslogd
25642 379814 1 0 3 0x100082 netio syslogd
20190 75084 1 77 3 0x100090 poll dhclient
53204 242965 1 0 3 0x80 poll dhclient
58423 165949 0 0 3 0x14200 bored smr
93986 296022 0 0 3 0x14200 pgzero zerothread
35567 116304 0 0 3 0x14200 aiodoned aiodoned
88474 302636 0 0 3 0x14200 syncer update
83892 357281 0 0 3 0x14200 cleaner cleaner
64951 153488 0 0 3 0x14200 reaper reaper
20245 371490 0 0 3 0x14200 pgdaemon pagedaemon
53446 426007 0 0 3 0x14200 bored crynlk
47116 35316 0 0 3 0x14200 bored crypto
54586 417751 0 0 3 0x40014200 acpi0 acpi0
55238 391535 0 0 3 0x40014200 idle1
89210 249204 0 0 3 0x14200 bored softnet
63989 123445 0 0 3 0x14200 bored systqmp
45903 145155 0 0 3 0x14200 bored systq
87761 254229 0 0 3 0x40014200 bored softclock
56646 38939 0 0 3 0x40014200 idle0
1 234850 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8267a578)
#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 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:941
#4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7 fork1+0x271 sys/kern/kern_fork.c:365
#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
Process 34091 (syz-executor.0) thread 0xffff800020e6c9c8 (90610)
exclusive rrwlock inode r = 0 (0xfffffd807d04f3d0)
#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 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b361918)
#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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#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
Process 52020 (syz-executor.1) thread 0xffff800020e6dad8 (260304)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82667e30)
#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
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8267a578)
#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 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:941
#4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7 fork1+0x271 sys/kern/kern_fork.c:365
#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
Process 45183 (sshd) thread 0xffff800020ede010 (166593)
exclusive rwlock netlock r = 0 (0xffffffff824c3998)
#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 9513 6483K 6806K 78643K 11040 0
pcb 13 8K 8K 78643K 135 0
rtable 74 2K 3K 78643K 339 0
ifaddr 73 15K 15K 78643K 98 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1479 0
iov 0 0K 16K 78643K 45 0
mount 1 1K 1K 78643K 1 0
vnodes 1218 77K 77K 78643K 1398 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 7 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 75 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 364 0
proc 61 63K 83K 78643K 510 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 51 0
in_multi 84 4K 4K 78643K 164 0
ether_multi 1 0K 0K 78643K 18 0
mrt 0 0K 0K 78643K 9 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 264 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 129 39K 55K 78643K 2121 0
UVM aobj 16 2K 2K 78643K 18 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 79 0
NDP 10 0K 0K 78643K 20 0
temp 93 3042K 3110K 78643K 3491 0
kqueue 3 4K 10K 78643K 10 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 37 0 35 1 0 1 1 0 8 0
rtentry 112 72 0 45 2 0 2 2 0 8 0
unpcb 120 161 0 151 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 426 0 426 1 1 0 1 0 8 0
tcpcb 544 171 0 167 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 2 0 2 1 1 0 1 0 8 0
inpcb 280 559 0 552 3 1 2 2 0 8 1
rttmr 72 4 0 4 1 0 1 1 0 8 1
nd6 48 11 0 9 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 1 1 1 0 8 1
pffrag 232 3 0 2 1 0 1 1 0 482 0
pffrnode 88 3 0 2 1 0 1 1 0 8 0
pffrent 40 50 0 49 1 0 1 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 41 0 11 1 0 1 1 0 8 0
pfstkey 112 41 0 11 1 0 1 1 0 8 0
pfstate 328 41 0 11 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 256 418 0 292 13 4 9 12 0 8 0
art_table 32 419 0 292 2 0 2 2 0 8 0
art_node 16 71 0 46 1 0 1 1 0 8 0
sysvmsgpl 40 27 0 20 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 67 0 57 1 0 1 1 0 8 0
shmpl 112 16 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1857 0 452 89 0 89 89 0 8 0
ffsino 272 1857 0 452 94 0 94 94 0 8 0
nchpl 144 2747 0 1153 60 0 60 60 0 8 0
uvmvnodes 72 2024 0 0 37 0 37 37 0 8 0
vnodes 208 2024 0 0 107 0 107 107 0 8 0
namei 1024 7471 0 7471 2 1 1 1 0 8 1
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 1 0 0 1 0 1 1 0 8 0
vmpool 560 3 0 2 1 0 1 1 0 8 0
scxspl 192 6997 0 6995 10 9 1 7 0 8 0
plimitpl 152 45 0 37 1 0 1 1 0 8 0
sigapl 424 578 0 545 4 0 4 4 0 8 0
futexpl 56 5487 0 5487 2 1 1 1 0 8 1
knotepl 112 82 0 63 1 0 1 1 0 8 0
kqueuepl 144 22 0 20 1 0 1 1 0 8 0
pipelkpl 48 126 0 116 1 0 1 1 0 8 0
pipepl 120 252 0 233 1 0 1 1 0 8 0
fdescpl 496 561 0 545 3 0 3 3 0 8 0
filepl 152 3560 0 3460 5 0 5 5 0 8 1
lockfpl 104 93 0 92 1 0 1 1 0 8 0
lockfspl 48 35 0 34 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 21 0 10 1 0 1 1 0 8 0
ucredpl 96 357 0 348 1 0 1 1 0 8 0
zombiepl 144 545 0 545 2 1 1 1 0 8 1
processpl 984 578 0 545 6 1 5 5 0 8 0
procpl 624 1296 0 1254 4 0 4 4 0 8 0
sockpl 400 764 0 745 5 2 3 3 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 12 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 215 0 0 26 0 26 26 0 8 0
mtagpl 80 19 0 0 1 0 1 1 0 8 0
mbufpl 256 284 0 0 15 0 15 15 0 8 0
bufpl 280 4032 0 134 279 0 279 279 0 8 0
anonpl 16 68572 0 54644 78 21 57 71 0 124 0
amapchunkpl 152 4120 0 3991 23 6 17 20 0 158 11
amappl16 192 2691 0 1946 53 15 38 48 0 8 0
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 33 0 28 1 0 1 1 0 8 0
amappl13 168 31 0 30 1 0 1 1 0 8 0
amappl12 160 9 0 4 2 1 1 1 0 8 0
amappl11 152 186 0 170 1 0 1 1 0 8 0
amappl10 144 21 0 14 1 0 1 1 0 8 0
amappl9 136 535 0 532 1 0 1 1 0 8 0
amappl8 128 541 0 501 2 0 2 2 0 8 0
amappl7 120 132 0 120 1 0 1 1 0 8 0
amappl6 112 153 0 151 1 0 1 1 0 8 0
amappl5 104 338 0 323 1 0 1 1 0 8 0
amappl4 96 632 0 601 1 0 1 1 0 8 0
amappl3 88 111 0 105 1 0 1 1 0 8 0
amappl2 80 3448 0 3388 2 0 2 2 0 8 0
amappl1 72 22543 0 22119 24 14 10 18 0 8 0
amappl 80 1559 0 1517 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 17 0 2 1 0 1 1 0 8 0
uaddrrnd 24 564 0 547 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 564 0 547 1 0 1 1 0 8 0
vmmpekpl 168 8203 0 8166 2 0 2 2 0 8 0
vmmpepl 168 75070 0 73202 128 33 95 109 0 357 11
vmsppl 368 563 0 547 2 0 2 2 0 8 0
pdppl 4096 1136 0 1095 6 0 6 6 0 8 0
pvpl 32 215286 0 198269 179 25 154 170 0 265 15
pmappl 232 563 0 547 3 1 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 270 0 10 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff3b50, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,65) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(65) at cnputc+0x4c sys/dev/cons.c:239
kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fc689) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fc689) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82692510,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb39c88,9,fffffd807f01fb00,0,0,ffff800020ede010) at tcp_usrreq+0xa55
end trace frame: 0xffff800020ecf270, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,65) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(65) at cnputc+0x4c sys/dev/cons.c:239
kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fc689) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fc689) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82692510,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb39c88,9,fffffd807f01fb00,0,0,ffff800020ede010) at tcp_usrreq+0xa55
sosend(fffffd806eb39c88,0,ffff800020ecf338,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ede010,4,ffff800020ecf338,0,ffff800020ecf420) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ede010,ffff800020ecf3d0,ffff800020ecf420) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020ecf4a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ecf4a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd7eb0, 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.
Greg Steuck
May 15, 2020, 5:56:42 PM5/15/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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