panic: pool_cache_itemp_anmiacgi:c _kechrencekl: dimbaugnfoplst iccpu asfrseeer tiloins t" m!o_dkiefriendel:_ liotcke_
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syzbot
Jun 9, 2020, 5:19:15 PM6/9/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: c0b83f5f It is not sensible to store pointers into an arra..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1795bb61100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=a662b2396fef9fda9173
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+a662b2...@syzkaller.appspotmail.com
panic: pool_cache_itemp_anmiacgi:c _kechrencekl: dimbaugnfoplst iccpu asfrseeer tiloins t" m!o_dkiefriendel:_ liotcke_mh ealddd(r) " 0fxfafilffefdd:8 f06il9dee 3"d/s00y+zk2a4 l0lxercf/1mfacn9ag5e24r6sd/cmu7l5t2ic0!or=e0x/kcerf1nfecl9/sdy22sf/k0e24r3n/20k
er
nStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
11545 54230 0 0 0 0 syz-executor.0
*145021 75789 0 0x12 0 1 sshd
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: 3
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8069de3d00+24 0xcf1fc95246dc7520!=0xcf1fc9d22f024320
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: -12
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020e72cc0
rbx 0xffff800020e72d70
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff820f27ff kprintf+0x16f
r9 0x1
r10 0x2
r11 0xf22184599ea9769f
r12 0x3000000008
r13 0xffff800020e72cd0
r14 0x100
r15 0x1
rip 0xffffffff813b5e58 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020e72cb0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (sshd) pid=145021 stat=onproc
flags process=12<EXEC,SUGID,8ORPHAN> proc=0
pri=24, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020e50280,0xffff800020e50500
process=0xffff800020e48018 user=0xffff800020e6e000, vmspace=0xfffffd806e8f28a8
estcpu=1, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
54230 11545 28550 0 7 0 syz-executor.0
64641 407821 0 0 3 0x14200 bored sosplice
65622 518629 37105 0 3 0x82 piperd syz-executor.1
28550 419181 37105 0 2 0x482 syz-executor.0
37105 208292 69942 0 2 0x2 syz-fuzzer
37105 138928 69942 0 2 0x4000482 syz-fuzzer
37105 418134 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 96756 69942 0 2 0x4000482 syz-fuzzer
37105 366822 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 257240 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 164690 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 356375 69942 0 3 0x4000082 kqread syz-fuzzer
37105 186675 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 227434 69942 0 3 0x4000082 thrsleep syz-fuzzer
69942 274011 75789 0 3 0x10008a pause ksh
*75789 145021 63624 0 7 0x12 sshd
49109 357302 1 0 3 0x100083 ttyin getty
63624 61717 1 0 3 0x80 select sshd
40626 84995 38758 74 3 0x100092 bpf pflogd
38758 276955 1 0 3 0x80 netio pflogd
47755 466764 23568 73 3 0x100090 kqread syslogd
23568 443940 1 0 3 0x100082 netio syslogd
11344 334298 1 77 3 0x100090 poll dhclient
86967 120224 1 0 3 0x80 poll dhclient
28709 514452 0 0 3 0x14200 bored smr
38607 405383 0 0 3 0x14200 pgzero zerothread
60245 177987 0 0 3 0x14200 aiodoned aiodoned
24237 186311 0 0 3 0x14200 syncer update
61107 430138 0 0 3 0x14200 cleaner cleaner
57294 203042 0 0 3 0x14200 reaper reaper
52894 392524 0 0 3 0x14200 pgdaemon pagedaemon
35426 469420 0 0 3 0x14200 bored crynlk
81647 191934 0 0 3 0x14200 bored crypto
15036 389492 0 0 3 0x40014200 acpi0 acpi0
55008 263778 0 0 3 0x40014200 idle1
2085 284482 0 0 3 0x14200 bored softnet
53944 208194 0 0 3 0x14200 bored systqmp
98353 107873 0 0 3 0x14200 bored systq
74063 224782 0 0 3 0x40014200 bored softclock
94076 25936 0 0 3 0x40014200 idle0
1 256070 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 75789 (sshd) thread 0xffff800020e51d50 (145021)
exclusive rwlock netlock r = 0 (0xffffffff827107f8)
#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{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9512 6413K 6730K 78643K 10866 0
pcb 13 8K 8K 78643K 57 0
rtable 96 3K 3K 78643K 289 0
ifaddr 66 13K 13K 78643K 85 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1485 0
iov 0 0K 16K 78643K 18 0
mount 1 1K 1K 78643K 1 0
vnodes 1220 77K 77K 78643K 1327 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 52 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 196 0
sigio 0 0K 0K 78643K 2 0
proc 60 63K 95K 78643K 444 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 6 0
in_multi 38 2K 2K 78643K 66 0
ether_multi 1 0K 0K 78643K 6 0
mrt 0 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 67 307K 307K 78643K 67 0
exec 0 0K 1K 78643K 219 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 125 39K 41K 78643K 1633 0
UVM aobj 4 2K 2K 78643K 4 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 30 0
NDP 11 0K 0K 78643K 19 0
temp 95 3846K 3910K 78643K 4474 0
kqueue 3 4K 8K 78643K 5 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 10 0 5 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 29 0 27 1 0 1 1 0 8 0
rtentry 112 61 0 23 2 0 2 2 0 8 0
unpcb 120 308 0 298 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpqe 32 166 0 166 1 1 0 1 0 8 0
tcpcb 544 68 0 64 1 0 1 1 0 8 0
inpcb 280 210 0 203 3 1 2 2 0 8 1
nd6 48 8 0 4 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 1 1 0 8 1
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 45 0 45 1 0 1 1 0 8 1
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 28 0 15 1 0 1 1 0 8 0
pfstkey 112 28 0 15 1 0 1 1 0 8 0
pfstate 328 28 0 15 3 1 2 2 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 256 269 0 72 15 2 13 13 0 8 0
art_table 32 270 0 72 2 0 2 2 0 8 0
art_node 16 60 0 25 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 5 1 1 0 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 50 0 40 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1671 0 267 89 0 89 89 0 8 0
ffsino 272 1671 0 267 96 1 95 95 0 8 0
nchpl 144 2138 0 530 60 0 60 60 0 8 0
uvmvnodes 72 1778 0 0 33 0 33 33 0 8 0
vnodes 208 1778 0 0 94 0 94 94 0 8 0
namei 1024 6087 0 6087 3 2 1 1 0 8 1
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 4 0 0 1 0 1 1 0 8 0
vmpool 560 4 0 0 1 0 1 1 0 8 0
scsiplug 64 1 0 1 1 0 1 1 0 8 1
scxspl 192 6539 0 6539 13 10 3 7 0 8 3
plimitpl 152 29 0 21 1 0 1 1 0 8 0
sigapl 424 413 0 381 4 0 4 4 0 8 0
futexpl 56 2782 0 2782 3 2 1 1 0 8 1
knotepl 112 63 0 44 1 0 1 1 0 8 0
kqueuepl 144 24 0 22 1 0 1 1 0 8 0
pipelkpl 48 96 0 86 1 0 1 1 0 8 0
pipepl 120 192 0 173 1 0 1 1 0 8 0
fdescpl 496 396 0 380 3 0 3 3 0 8 0
filepl 152 2575 0 2475 5 0 5 5 0 8 1
lockfpl 104 56 0 55 1 0 1 1 0 8 0
lockfspl 48 18 0 17 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 37 0 26 1 0 1 1 0 8 0
ucredpl 96 510 0 501 1 0 1 1 0 8 0
zombiepl 144 381 0 381 1 0 1 1 0 8 1
processpl 984 413 0 381 5 0 5 5 0 8 0
procpl 624 857 0 816 4 0 4 4 0 8 0
srpgc 64 1 0 1 1 1 0 1 0 8 0
sosppl 128 6 0 6 2 2 0 1 0 8 0
sockpl 400 551 0 532 5 2 3 4 0 8 1
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 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 168 0 0 20 0 20 20 0 8 0
mtagpl 80 14 0 0 1 0 1 1 0 8 0
mbufpl 256 379 0 0 20 0 20 20 0 8 0
bufpl 280 3858 0 133 267 0 267 267 0 8 0
anonpl 16 59890 0 43600 82 14 68 80 0 124 1
amapchunkpl 152 2374 0 2216 15 1 14 14 0 158 6
amappl16 192 2291 0 1433 58 13 45 54 0 8 1
amappl15 184 3 0 1 1 0 1 1 0 8 0
amappl14 176 26 0 20 1 0 1 1 0 8 0
amappl13 168 28 0 25 1 0 1 1 0 8 0
amappl12 160 90 0 88 1 0 1 1 0 8 0
amappl11 152 66 0 50 1 0 1 1 0 8 0
amappl10 144 21 0 13 1 0 1 1 0 8 0
amappl9 136 386 0 385 1 0 1 1 0 8 0
amappl8 128 362 0 324 2 0 2 2 0 8 0
amappl7 120 126 0 114 1 0 1 1 0 8 0
amappl6 112 24 0 20 1 0 1 1 0 8 0
amappl5 104 378 0 362 1 0 1 1 0 8 0
amappl4 96 496 0 466 1 0 1 1 0 8 0
amappl3 88 103 0 97 1 0 1 1 0 8 0
amappl2 80 2191 0 2130 2 0 2 2 0 8 0
amappl1 72 18844 0 18418 23 12 11 18 0 8 0
amappl 80 1110 0 1064 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 3 0 0 1 0 1 1 0 8 0
uaddrrnd 24 400 0 380 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 400 0 380 1 0 1 1 0 8 0
vmmpekpl 168 7210 0 7177 2 0 2 2 0 8 0
vmmpepl 168 55693 0 53699 133 37 96 114 0 357 4
vmsppl 368 399 0 380 2 0 2 2 0 8 0
pdppl 4096 807 0 764 6 0 6 6 0 8 0
pvpl 32 187520 0 168682 191 30 161 190 0 265 7
pmappl 232 399 0 380 3 1 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 273 0 10 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82769ff0) 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(3f8,0,6e) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,6e) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(6e) at cnputc+0x4c sys/dev/cons.c:239
kputchar(6e,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e4585) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e4585) at panic+0xf3 sys/kern/subr_prf.c:197
__assert(ffffffff8244cfc2,ffffffff8243237d,29e,ffffffff8240fd1b) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff82769ff0) 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(3f8,0,6e) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,6e) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(6e) at cnputc+0x4c sys/dev/cons.c:239
kputchar(6e,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e4585) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e4585) at panic+0xf3 sys/kern/subr_prf.c:197
__assert(ffffffff8244cfc2,ffffffff8243237d,29e,ffffffff8240fd1b) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: 3
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: -12
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot found the following crash on:
HEAD commit: c0b83f5f It is not sensible to store pointers into an arra..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1795bb61100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=a662b2396fef9fda9173
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+a662b2...@syzkaller.appspotmail.com
panic: pool_cache_itemp_anmiacgi:c _kechrencekl: dimbaugnfoplst iccpu asfrseeer tiloins t" m!o_dkiefriendel:_ liotcke_mh ealddd(r) " 0fxfafilffefdd:8 f06il9dee 3"d/s00y+zk2a4 l0lxercf/1mfacn9ag5e24r6sd/cmu7l5t2ic0!or=e0x/kcerf1nfecl9/sdy22sf/k0e24r3n/20k
er
nStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
11545 54230 0 0 0 0 syz-executor.0
*145021 75789 0 0x12 0 1 sshd
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: 3
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8069de3d00+24 0xcf1fc95246dc7520!=0xcf1fc9d22f024320
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: -12
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020e72cc0
rbx 0xffff800020e72d70
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff820f27ff kprintf+0x16f
r9 0x1
r10 0x2
r11 0xf22184599ea9769f
r12 0x3000000008
r13 0xffff800020e72cd0
r14 0x100
r15 0x1
rip 0xffffffff813b5e58 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020e72cb0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (sshd) pid=145021 stat=onproc
flags process=12<EXEC,SUGID,8ORPHAN> proc=0
pri=24, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff800020e50280,0xffff800020e50500
process=0xffff800020e48018 user=0xffff800020e6e000, vmspace=0xfffffd806e8f28a8
estcpu=1, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
54230 11545 28550 0 7 0 syz-executor.0
64641 407821 0 0 3 0x14200 bored sosplice
65622 518629 37105 0 3 0x82 piperd syz-executor.1
28550 419181 37105 0 2 0x482 syz-executor.0
37105 208292 69942 0 2 0x2 syz-fuzzer
37105 138928 69942 0 2 0x4000482 syz-fuzzer
37105 418134 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 96756 69942 0 2 0x4000482 syz-fuzzer
37105 366822 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 257240 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 164690 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 356375 69942 0 3 0x4000082 kqread syz-fuzzer
37105 186675 69942 0 3 0x4000082 thrsleep syz-fuzzer
37105 227434 69942 0 3 0x4000082 thrsleep syz-fuzzer
69942 274011 75789 0 3 0x10008a pause ksh
*75789 145021 63624 0 7 0x12 sshd
49109 357302 1 0 3 0x100083 ttyin getty
63624 61717 1 0 3 0x80 select sshd
40626 84995 38758 74 3 0x100092 bpf pflogd
38758 276955 1 0 3 0x80 netio pflogd
47755 466764 23568 73 3 0x100090 kqread syslogd
23568 443940 1 0 3 0x100082 netio syslogd
11344 334298 1 77 3 0x100090 poll dhclient
86967 120224 1 0 3 0x80 poll dhclient
28709 514452 0 0 3 0x14200 bored smr
38607 405383 0 0 3 0x14200 pgzero zerothread
60245 177987 0 0 3 0x14200 aiodoned aiodoned
24237 186311 0 0 3 0x14200 syncer update
61107 430138 0 0 3 0x14200 cleaner cleaner
57294 203042 0 0 3 0x14200 reaper reaper
52894 392524 0 0 3 0x14200 pgdaemon pagedaemon
35426 469420 0 0 3 0x14200 bored crynlk
81647 191934 0 0 3 0x14200 bored crypto
15036 389492 0 0 3 0x40014200 acpi0 acpi0
55008 263778 0 0 3 0x40014200 idle1
2085 284482 0 0 3 0x14200 bored softnet
53944 208194 0 0 3 0x14200 bored systqmp
98353 107873 0 0 3 0x14200 bored systq
74063 224782 0 0 3 0x40014200 bored softclock
94076 25936 0 0 3 0x40014200 idle0
1 256070 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 75789 (sshd) thread 0xffff800020e51d50 (145021)
exclusive rwlock netlock r = 0 (0xffffffff827107f8)
#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{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9512 6413K 6730K 78643K 10866 0
pcb 13 8K 8K 78643K 57 0
rtable 96 3K 3K 78643K 289 0
ifaddr 66 13K 13K 78643K 85 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1485 0
iov 0 0K 16K 78643K 18 0
mount 1 1K 1K 78643K 1 0
vnodes 1220 77K 77K 78643K 1327 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 52 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 196 0
sigio 0 0K 0K 78643K 2 0
proc 60 63K 95K 78643K 444 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 6 0
in_multi 38 2K 2K 78643K 66 0
ether_multi 1 0K 0K 78643K 6 0
mrt 0 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 67 307K 307K 78643K 67 0
exec 0 0K 1K 78643K 219 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 125 39K 41K 78643K 1633 0
UVM aobj 4 2K 2K 78643K 4 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 30 0
NDP 11 0K 0K 78643K 19 0
temp 95 3846K 3910K 78643K 4474 0
kqueue 3 4K 8K 78643K 5 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 10 0 5 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 29 0 27 1 0 1 1 0 8 0
rtentry 112 61 0 23 2 0 2 2 0 8 0
unpcb 120 308 0 298 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpqe 32 166 0 166 1 1 0 1 0 8 0
tcpcb 544 68 0 64 1 0 1 1 0 8 0
inpcb 280 210 0 203 3 1 2 2 0 8 1
nd6 48 8 0 4 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 1 1 0 8 1
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 45 0 45 1 0 1 1 0 8 1
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 28 0 15 1 0 1 1 0 8 0
pfstkey 112 28 0 15 1 0 1 1 0 8 0
pfstate 328 28 0 15 3 1 2 2 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 256 269 0 72 15 2 13 13 0 8 0
art_table 32 270 0 72 2 0 2 2 0 8 0
art_node 16 60 0 25 1 0 1 1 0 8 0
sysvmsgpl 40 5 0 5 1 1 0 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 50 0 40 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1671 0 267 89 0 89 89 0 8 0
ffsino 272 1671 0 267 96 1 95 95 0 8 0
nchpl 144 2138 0 530 60 0 60 60 0 8 0
uvmvnodes 72 1778 0 0 33 0 33 33 0 8 0
vnodes 208 1778 0 0 94 0 94 94 0 8 0
namei 1024 6087 0 6087 3 2 1 1 0 8 1
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 4 0 0 1 0 1 1 0 8 0
vmpool 560 4 0 0 1 0 1 1 0 8 0
scsiplug 64 1 0 1 1 0 1 1 0 8 1
scxspl 192 6539 0 6539 13 10 3 7 0 8 3
plimitpl 152 29 0 21 1 0 1 1 0 8 0
sigapl 424 413 0 381 4 0 4 4 0 8 0
futexpl 56 2782 0 2782 3 2 1 1 0 8 1
knotepl 112 63 0 44 1 0 1 1 0 8 0
kqueuepl 144 24 0 22 1 0 1 1 0 8 0
pipelkpl 48 96 0 86 1 0 1 1 0 8 0
pipepl 120 192 0 173 1 0 1 1 0 8 0
fdescpl 496 396 0 380 3 0 3 3 0 8 0
filepl 152 2575 0 2475 5 0 5 5 0 8 1
lockfpl 104 56 0 55 1 0 1 1 0 8 0
lockfspl 48 18 0 17 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 37 0 26 1 0 1 1 0 8 0
ucredpl 96 510 0 501 1 0 1 1 0 8 0
zombiepl 144 381 0 381 1 0 1 1 0 8 1
processpl 984 413 0 381 5 0 5 5 0 8 0
procpl 624 857 0 816 4 0 4 4 0 8 0
srpgc 64 1 0 1 1 1 0 1 0 8 0
sosppl 128 6 0 6 2 2 0 1 0 8 0
sockpl 400 551 0 532 5 2 3 4 0 8 1
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 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 168 0 0 20 0 20 20 0 8 0
mtagpl 80 14 0 0 1 0 1 1 0 8 0
mbufpl 256 379 0 0 20 0 20 20 0 8 0
bufpl 280 3858 0 133 267 0 267 267 0 8 0
anonpl 16 59890 0 43600 82 14 68 80 0 124 1
amapchunkpl 152 2374 0 2216 15 1 14 14 0 158 6
amappl16 192 2291 0 1433 58 13 45 54 0 8 1
amappl15 184 3 0 1 1 0 1 1 0 8 0
amappl14 176 26 0 20 1 0 1 1 0 8 0
amappl13 168 28 0 25 1 0 1 1 0 8 0
amappl12 160 90 0 88 1 0 1 1 0 8 0
amappl11 152 66 0 50 1 0 1 1 0 8 0
amappl10 144 21 0 13 1 0 1 1 0 8 0
amappl9 136 386 0 385 1 0 1 1 0 8 0
amappl8 128 362 0 324 2 0 2 2 0 8 0
amappl7 120 126 0 114 1 0 1 1 0 8 0
amappl6 112 24 0 20 1 0 1 1 0 8 0
amappl5 104 378 0 362 1 0 1 1 0 8 0
amappl4 96 496 0 466 1 0 1 1 0 8 0
amappl3 88 103 0 97 1 0 1 1 0 8 0
amappl2 80 2191 0 2130 2 0 2 2 0 8 0
amappl1 72 18844 0 18418 23 12 11 18 0 8 0
amappl 80 1110 0 1064 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 3 0 0 1 0 1 1 0 8 0
uaddrrnd 24 400 0 380 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 400 0 380 1 0 1 1 0 8 0
vmmpekpl 168 7210 0 7177 2 0 2 2 0 8 0
vmmpepl 168 55693 0 53699 133 37 96 114 0 357 4
vmsppl 368 399 0 380 2 0 2 2 0 8 0
pdppl 4096 807 0 764 6 0 6 6 0 8 0
pvpl 32 187520 0 168682 191 30 161 190 0 265 7
pmappl 232 399 0 380 3 1 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 273 0 10 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82769ff0) 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(3f8,0,6e) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,6e) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(6e) at cnputc+0x4c sys/dev/cons.c:239
kputchar(6e,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e4585) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e4585) at panic+0xf3 sys/kern/subr_prf.c:197
__assert(ffffffff8244cfc2,ffffffff8243237d,29e,ffffffff8240fd1b) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff82769ff0) 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(3f8,0,6e) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,6e) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(6e) at cnputc+0x4c sys/dev/cons.c:239
kputchar(6e,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e4585) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e4585) at panic+0xf3 sys/kern/subr_prf.c:197
__assert(ffffffff8244cfc2,ffffffff8243237d,29e,ffffffff8240fd1b) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: 3
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e1c6d) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828f5cf8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828f5cf8,2) 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(ffff800000ad7320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae3648,9,fffffd8069de3100,0,0,ffff800020e51d50) at tcp_usrreq+0xa55
sosend(fffffd806eae3648,0,ffff800020e732c8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e51d50,4,ffff800020e732c8,0,ffff800020e733b0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e51d50,ffff800020e73360,ffff800020e733b0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e73430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e73430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4830, count: -12
---
This bug is generated by a bot. It may contain errors.
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Anton Lindqvist
Jun 10, 2020, 2:17:25 AM6/10/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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