panic: WApRoNolIN_Gc:a cShPLe _iNOteT mL_OmWaEgRiEcD_c OhNe cSkY:S CmAbuLLf pl2 c-1p6u5 0f2r1e10e1 1l iEstXI Tm od0 iaf
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syzbot
Jul 15, 2020, 1:37:16 PM7/15/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: f8fbf366 Add a forward declaration of struct cpu_info. Fix..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17c099bf100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=6be505c298aae462c952
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6be505...@syzkaller.appspotmail.com
panic: WApRoNolIN_Gc:a cShPLe _iNOteT mL_OmWaEgRiEcD_c OhNe cSkY:S CmAbuLLf pl2 c-1p6u5 0f2r1e10e1 1l iEstXI Tm od0 iafi
e
d:Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*310264 96266 0 0x2 0 1 syz-executor.0
360307 70429 0 0x12 0 0 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, 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{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 0xfffffd80667b2b00+24 0x76a281f065e42442!=0x76a281700d2d3a42
ddb{1}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800020edc1f0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x3b
r8 0xffffffff81ec8d2f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xedf1b4179adbce34
r12 0
r13 0
r14 0xffff800020ddc278
r15 0
rip 0xffffffff811173f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020edc170
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{1}> show proc
PROC (syz-executor.0) pid=310264 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=16, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020ddc758,0xffff800020e04af8
process=0xffff800020df07d0 user=0xffff800020ed7000, vmspace=0xfffffd807efffcf0
estcpu=36, cpticks=2, pctcpu=0.51
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
36331 403507 96266 0 2 0 syz-executor.0
27348 319243 0 0 3 0x14200 acct acct
52867 228938 0 0 3 0x14200 bored sosplice
7040 408335 62508 0 3 0x82 piperd syz-executor.1
*96266 310264 62508 0 7 0x2 syz-executor.0
62508 258673 80234 0 3 0x82 thrsleep syz-fuzzer
62508 168720 80234 0 3 0x4000082 nanosleep syz-fuzzer
62508 448917 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 184901 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 273538 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 385235 80234 0 2 0x4000002 syz-fuzzer
62508 412139 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 128831 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 516399 80234 0 2 0x4000002 syz-fuzzer
62508 182589 80234 0 3 0x4000082 thrsleep syz-fuzzer
80234 164179 70429 0 3 0x10008a pause ksh
70429 360307 79734 0 7 0x12 sshd
58665 32714 1 0 3 0x100083 ttyin getty
79734 303908 1 0 3 0x80 select sshd
43985 196138 97174 74 3 0x100092 bpf pflogd
97174 182726 1 0 3 0x80 netio pflogd
31846 47421 86625 73 3 0x100090 kqread syslogd
86625 428277 1 0 3 0x100082 netio syslogd
16356 297334 1 77 3 0x100090 poll dhclient
57649 286200 1 0 3 0x80 poll dhclient
18555 249216 0 0 3 0x14200 bored smr
3177 68947 0 0 2 0x14200 zerothread
52076 324615 0 0 3 0x14200 aiodoned aiodoned
73241 470991 0 0 3 0x14200 syncer update
80603 77671 0 0 3 0x14200 cleaner cleaner
90617 40208 0 0 3 0x14200 reaper reaper
52679 115449 0 0 3 0x14200 pgdaemon pagedaemon
51053 80514 0 0 3 0x14200 bored crynlk
15693 17931 0 0 3 0x14200 bored crypto
73380 247741 0 0 3 0x40014200 acpi0 acpi0
90224 285459 0 0 3 0x40014200 idle1
87789 17732 0 0 3 0x14200 bored softnet
18834 338207 0 0 3 0x14200 bored systqmp
98549 284338 0 0 3 0x14200 bored systq
36820 338583 0 0 3 0x40014200 bored softclock
66397 375354 0 0 3 0x40014200 idle0
1 222450 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &map->flags_lock r = 0 (0xffffffff828040c0)
#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 vm_map_lock_ln+0x132 sys/uvm/uvm_map.c:5448
#4 uvm_map+0x2d0 sys/uvm/uvm_map.c:1236
#5 uvm_km_kmemalloc_pla+0x11d sys/uvm/uvm_km.c:335
#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 96266 (syz-executor.0) thread 0xffff800020ddc278 (310264)
exclusive rwlock kmmaplk r = 0 (0xffffffff82804038)
#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 vm_map_lock_ln+0x111 sys/uvm/uvm_map.c:5445
#3 uvm_map+0x2d0 sys/uvm/uvm_map.c:1236
#4 uvm_km_kmemalloc_pla+0x11d sys/uvm/uvm_km.c:335
#5 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#6 fork1+0x271 sys/kern/kern_fork.c:365
#7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#8 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828c8768)
#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 &map->flags_lock r = 0 (0xffffffff828040c0)
#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 vm_map_lock_ln+0x132 sys/uvm/uvm_map.c:5448
#4 uvm_map+0x2d0 sys/uvm/uvm_map.c:1236
#5 uvm_km_kmemalloc_pla+0x11d sys/uvm/uvm_km.c:335
#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 70429 (sshd) thread 0xffff800020e4d9d0 (360307)
exclusive rwlock netlock r = 0 (0xffffffff826ebbd8)
#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:543
#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 9528 6435K 6693K 78643K 11121 0
pcb 13 8K 8K 78643K 55 0
rtable 102 3K 5K 78643K 389 0
ifaddr 84 16K 17K 78643K 171 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 61 0
ioctlops 0 0K 4K 78643K 1529 0
iov 0 0K 16K 78643K 378 0
mount 1 1K 1K 78643K 1 0
vnodes 1217 77K 77K 78643K 1415 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 0K 78643K 65 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 456 0
sigio 0 0K 0K 78643K 7 0
proc 62 63K 83K 78643K 492 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 26 0
in_multi 65 3K 3K 78643K 161 0
ether_multi 1 0K 0K 78643K 6 0
mrt 0 0K 0K 78643K 6 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 231 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 123 55K 55K 78643K 2415 0
UVM aobj 31 2K 2K 78643K 31 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 27 0
NDP 13 0K 0K 78643K 41 0
temp 125 3867K 3931K 78643K 12610 0
kqueue 3 4K 12K 78643K 18 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 34 0 32 1 0 1 1 0 8 0
rtentry 112 83 0 42 2 0 2 2 0 8 0
unpcb 120 177 0 167 1 0 1 1 0 8 0
syncache 264 11 0 11 3 3 0 1 0 8 0
tcpqe 32 427 0 427 2 2 0 1 0 8 0
tcpcb 544 134 0 128 2 0 2 2 0 8 1
inpcb 296 463 0 454 3 1 2 2 0 8 1
rttmr 72 1 0 1 1 0 1 1 0 8 1
nd6 48 26 0 23 1 0 1 1 0 8 0
pkpcb 40 6 0 6 2 2 0 1 0 8 0
ppxss 1128 2 0 2 2 1 1 1 0 8 1
pffrag 232 6 0 6 1 1 0 1 0 482 0
pffrnode 88 6 0 6 1 1 0 1 0 8 0
pffrent 40 229 0 229 2 2 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
pfrktable 1344 14 0 14 1 1 0 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 264 2 0 2 1 1 0 1 0 8 0
pfstitem 24 50 0 16 1 0 1 1 0 8 0
pfstkey 112 50 0 16 2 0 2 2 0 8 0
pfstate 328 50 0 16 3 0 3 3 0 8 0
pfrule 1360 25 0 20 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 331 0 130 13 0 13 13 0 8 0
art_table 32 333 0 130 2 0 2 2 0 8 0
art_node 16 82 0 43 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 5 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 63 0 53 1 0 1 1 0 8 0
shmpl 112 28 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2136 0 734 89 0 89 89 0 8 0
ffsino 272 2136 0 734 94 0 94 94 0 8 0
nchpl 144 3172 0 1564 60 0 60 60 0 8 0
uvmvnodes 72 2298 0 0 42 0 42 42 0 8 0
vnodes 208 2298 0 0 121 0 121 121 0 8 0
namei 1024 8771 0 8771 2 1 1 1 0 8 1
percpumem 16 41 0 9 1 0 1 1 0 8 0
vcpupl 1984 7 0 0 1 0 1 1 0 8 0
vmpool 560 9 0 2 1 0 1 1 0 8 0
pfiaddrpl 120 4 0 4 1 1 0 1 0 8 0
scxspl 192 8935 0 8935 11 8 3 7 0 8 3
plimitpl 152 43 0 35 1 0 1 1 0 8 0
sigapl 424 673 0 640 4 0 4 4 0 8 0
futexpl 56 7945 0 7945 2 1 1 1 0 8 1
knotepl 112 83 0 64 1 0 1 1 0 8 0
kqueuepl 144 53 0 51 1 0 1 1 0 8 0
pipepl 304 136 0 126 5 3 2 2 0 8 1
fdescpl 496 656 0 640 3 0 3 3 0 8 0
filepl 152 4033 0 3933 6 0 6 6 0 8 2
lockfpl 104 338 0 337 1 0 1 1 0 8 0
lockfspl 48 150 0 149 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 22 0 11 1 0 1 1 0 8 0
ucredpl 96 421 0 412 1 0 1 1 0 8 0
zombiepl 144 640 0 640 1 0 1 1 0 8 1
processpl 992 673 0 640 5 0 5 5 0 8 0
procpl 624 1517 0 1475 4 0 4 4 0 8 0
sosppl 128 8 0 8 3 2 1 1 0 8 1
sockpl 400 680 0 659 5 1 4 4 0 8 1
mcl64k 65536 12 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 11 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 192 0 0 23 0 23 23 0 8 0
mtagpl 96 47 0 0 2 0 2 2 0 8 0
mbufpl 256 372 0 0 22 0 22 22 0 8 0
bufpl 280 4339 0 132 301 0 301 301 0 8 0
anonpl 16 78071 0 61001 96 13 83 85 0 124 14
amapchunkpl 152 3708 0 3559 22 15 7 20 0 158 0
amappl16 192 3085 0 2168 69 17 52 58 0 8 6
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 27 0 21 1 0 1 1 0 8 0
amappl13 168 451 0 446 1 0 1 1 0 8 0
amappl12 160 357 0 353 2 1 1 1 0 8 0
amappl11 152 58 0 42 1 0 1 1 0 8 0
amappl10 144 27 0 19 1 0 1 1 0 8 0
amappl9 136 387 0 386 1 0 1 1 0 8 0
amappl8 128 358 0 324 2 0 2 2 0 8 0
amappl7 120 117 0 106 1 0 1 1 0 8 0
amappl6 112 25 0 21 1 0 1 1 0 8 0
amappl5 104 563 0 547 1 0 1 1 0 8 0
amappl4 96 564 0 536 1 0 1 1 0 8 0
amappl3 88 119 0 114 1 0 1 1 0 8 0
amappl2 80 4654 0 4593 2 0 2 2 0 8 0
amappl1 72 23124 0 22698 23 13 10 18 0 8 0
amappl 80 1770 0 1723 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 30 0 0 1 0 1 1 0 8 0
uaddrrnd 24 665 0 642 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 665 0 642 1 0 1 1 0 8 0
vmmpekpl 168 9103 0 9066 2 0 2 2 0 8 0
vmmpepl 168 86729 0 84658 128 28 100 113 0 357 7
vmsppl 368 664 0 642 3 0 3 3 0 8 0
pdppl 4096 1337 0 1291 6 0 6 6 0 8 0
pvpl 32 237695 0 217565 211 14 197 199 0 265 34
pmappl 232 664 0 642 4 2 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 278 0 5 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff827a2ff0) 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fe76b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fe76b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828bfab0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ada760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eadf7d8,9,fffffd8066811500,0,0,ffff800020e4d9d0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e24a60, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff827a2ff0) 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fe76b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fe76b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828bfab0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ada760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eadf7d8,9,fffffd8066811500,0,0,ffff800020e4d9d0) at tcp_usrreq+0xa55
sosend(fffffd806eadf7d8,0,ffff800020e24b28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e4d9d0,4,ffff800020e24b28,0,ffff800020e24c10) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e4d9d0,ffff800020e24bc0,ffff800020e24c10) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e24c90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e24c90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffcc120, count: -19
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xb1: movl $0,%gs:0x530
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, count: 14
ddb{1}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, count: -1
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: f8fbf366 Add a forward declaration of struct cpu_info. Fix..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17c099bf100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=6be505c298aae462c952
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6be505...@syzkaller.appspotmail.com
panic: WApRoNolIN_Gc:a cShPLe _iNOteT mL_OmWaEgRiEcD_c OhNe cSkY:S CmAbuLLf pl2 c-1p6u5 0f2r1e10e1 1l iEstXI Tm od0 iafi
e
d:Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*310264 96266 0 0x2 0 1 syz-executor.0
360307 70429 0 0x12 0 0 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, 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{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 0xfffffd80667b2b00+24 0x76a281f065e42442!=0x76a281700d2d3a42
ddb{1}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800020edc1f0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x3b
r8 0xffffffff81ec8d2f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xedf1b4179adbce34
r12 0
r13 0
r14 0xffff800020ddc278
r15 0
rip 0xffffffff811173f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020edc170
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{1}> show proc
PROC (syz-executor.0) pid=310264 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=16, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020ddc758,0xffff800020e04af8
process=0xffff800020df07d0 user=0xffff800020ed7000, vmspace=0xfffffd807efffcf0
estcpu=36, cpticks=2, pctcpu=0.51
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
36331 403507 96266 0 2 0 syz-executor.0
27348 319243 0 0 3 0x14200 acct acct
52867 228938 0 0 3 0x14200 bored sosplice
7040 408335 62508 0 3 0x82 piperd syz-executor.1
*96266 310264 62508 0 7 0x2 syz-executor.0
62508 258673 80234 0 3 0x82 thrsleep syz-fuzzer
62508 168720 80234 0 3 0x4000082 nanosleep syz-fuzzer
62508 448917 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 184901 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 273538 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 385235 80234 0 2 0x4000002 syz-fuzzer
62508 412139 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 128831 80234 0 3 0x4000082 thrsleep syz-fuzzer
62508 516399 80234 0 2 0x4000002 syz-fuzzer
62508 182589 80234 0 3 0x4000082 thrsleep syz-fuzzer
80234 164179 70429 0 3 0x10008a pause ksh
70429 360307 79734 0 7 0x12 sshd
58665 32714 1 0 3 0x100083 ttyin getty
79734 303908 1 0 3 0x80 select sshd
43985 196138 97174 74 3 0x100092 bpf pflogd
97174 182726 1 0 3 0x80 netio pflogd
31846 47421 86625 73 3 0x100090 kqread syslogd
86625 428277 1 0 3 0x100082 netio syslogd
16356 297334 1 77 3 0x100090 poll dhclient
57649 286200 1 0 3 0x80 poll dhclient
18555 249216 0 0 3 0x14200 bored smr
3177 68947 0 0 2 0x14200 zerothread
52076 324615 0 0 3 0x14200 aiodoned aiodoned
73241 470991 0 0 3 0x14200 syncer update
80603 77671 0 0 3 0x14200 cleaner cleaner
90617 40208 0 0 3 0x14200 reaper reaper
52679 115449 0 0 3 0x14200 pgdaemon pagedaemon
51053 80514 0 0 3 0x14200 bored crynlk
15693 17931 0 0 3 0x14200 bored crypto
73380 247741 0 0 3 0x40014200 acpi0 acpi0
90224 285459 0 0 3 0x40014200 idle1
87789 17732 0 0 3 0x14200 bored softnet
18834 338207 0 0 3 0x14200 bored systqmp
98549 284338 0 0 3 0x14200 bored systq
36820 338583 0 0 3 0x40014200 bored softclock
66397 375354 0 0 3 0x40014200 idle0
1 222450 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &map->flags_lock r = 0 (0xffffffff828040c0)
#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 vm_map_lock_ln+0x132 sys/uvm/uvm_map.c:5448
#4 uvm_map+0x2d0 sys/uvm/uvm_map.c:1236
#5 uvm_km_kmemalloc_pla+0x11d sys/uvm/uvm_km.c:335
#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 96266 (syz-executor.0) thread 0xffff800020ddc278 (310264)
exclusive rwlock kmmaplk r = 0 (0xffffffff82804038)
#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 vm_map_lock_ln+0x111 sys/uvm/uvm_map.c:5445
#3 uvm_map+0x2d0 sys/uvm/uvm_map.c:1236
#4 uvm_km_kmemalloc_pla+0x11d sys/uvm/uvm_km.c:335
#5 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#6 fork1+0x271 sys/kern/kern_fork.c:365
#7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#8 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828c8768)
#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 &map->flags_lock r = 0 (0xffffffff828040c0)
#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 vm_map_lock_ln+0x132 sys/uvm/uvm_map.c:5448
#4 uvm_map+0x2d0 sys/uvm/uvm_map.c:1236
#5 uvm_km_kmemalloc_pla+0x11d sys/uvm/uvm_km.c:335
#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 70429 (sshd) thread 0xffff800020e4d9d0 (360307)
exclusive rwlock netlock r = 0 (0xffffffff826ebbd8)
#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:543
#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 9528 6435K 6693K 78643K 11121 0
pcb 13 8K 8K 78643K 55 0
rtable 102 3K 5K 78643K 389 0
ifaddr 84 16K 17K 78643K 171 0
sysctl 2 0K 0K 78643K 2 0
counters 43 33K 34K 78643K 61 0
ioctlops 0 0K 4K 78643K 1529 0
iov 0 0K 16K 78643K 378 0
mount 1 1K 1K 78643K 1 0
vnodes 1217 77K 77K 78643K 1415 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 0K 78643K 65 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 456 0
sigio 0 0K 0K 78643K 7 0
proc 62 63K 83K 78643K 492 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 26 0
in_multi 65 3K 3K 78643K 161 0
ether_multi 1 0K 0K 78643K 6 0
mrt 0 0K 0K 78643K 6 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 231 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 123 55K 55K 78643K 2415 0
UVM aobj 31 2K 2K 78643K 31 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 27 0
NDP 13 0K 0K 78643K 41 0
temp 125 3867K 3931K 78643K 12610 0
kqueue 3 4K 12K 78643K 18 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 34 0 32 1 0 1 1 0 8 0
rtentry 112 83 0 42 2 0 2 2 0 8 0
unpcb 120 177 0 167 1 0 1 1 0 8 0
syncache 264 11 0 11 3 3 0 1 0 8 0
tcpqe 32 427 0 427 2 2 0 1 0 8 0
tcpcb 544 134 0 128 2 0 2 2 0 8 1
inpcb 296 463 0 454 3 1 2 2 0 8 1
rttmr 72 1 0 1 1 0 1 1 0 8 1
nd6 48 26 0 23 1 0 1 1 0 8 0
pkpcb 40 6 0 6 2 2 0 1 0 8 0
ppxss 1128 2 0 2 2 1 1 1 0 8 1
pffrag 232 6 0 6 1 1 0 1 0 482 0
pffrnode 88 6 0 6 1 1 0 1 0 8 0
pffrent 40 229 0 229 2 2 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
pfrktable 1344 14 0 14 1 1 0 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 264 2 0 2 1 1 0 1 0 8 0
pfstitem 24 50 0 16 1 0 1 1 0 8 0
pfstkey 112 50 0 16 2 0 2 2 0 8 0
pfstate 328 50 0 16 3 0 3 3 0 8 0
pfrule 1360 25 0 20 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 331 0 130 13 0 13 13 0 8 0
art_table 32 333 0 130 2 0 2 2 0 8 0
art_node 16 82 0 43 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 5 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 63 0 53 1 0 1 1 0 8 0
shmpl 112 28 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2136 0 734 89 0 89 89 0 8 0
ffsino 272 2136 0 734 94 0 94 94 0 8 0
nchpl 144 3172 0 1564 60 0 60 60 0 8 0
uvmvnodes 72 2298 0 0 42 0 42 42 0 8 0
vnodes 208 2298 0 0 121 0 121 121 0 8 0
namei 1024 8771 0 8771 2 1 1 1 0 8 1
percpumem 16 41 0 9 1 0 1 1 0 8 0
vcpupl 1984 7 0 0 1 0 1 1 0 8 0
vmpool 560 9 0 2 1 0 1 1 0 8 0
pfiaddrpl 120 4 0 4 1 1 0 1 0 8 0
scxspl 192 8935 0 8935 11 8 3 7 0 8 3
plimitpl 152 43 0 35 1 0 1 1 0 8 0
sigapl 424 673 0 640 4 0 4 4 0 8 0
futexpl 56 7945 0 7945 2 1 1 1 0 8 1
knotepl 112 83 0 64 1 0 1 1 0 8 0
kqueuepl 144 53 0 51 1 0 1 1 0 8 0
pipepl 304 136 0 126 5 3 2 2 0 8 1
fdescpl 496 656 0 640 3 0 3 3 0 8 0
filepl 152 4033 0 3933 6 0 6 6 0 8 2
lockfpl 104 338 0 337 1 0 1 1 0 8 0
lockfspl 48 150 0 149 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 22 0 11 1 0 1 1 0 8 0
ucredpl 96 421 0 412 1 0 1 1 0 8 0
zombiepl 144 640 0 640 1 0 1 1 0 8 1
processpl 992 673 0 640 5 0 5 5 0 8 0
procpl 624 1517 0 1475 4 0 4 4 0 8 0
sosppl 128 8 0 8 3 2 1 1 0 8 1
sockpl 400 680 0 659 5 1 4 4 0 8 1
mcl64k 65536 12 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 11 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 192 0 0 23 0 23 23 0 8 0
mtagpl 96 47 0 0 2 0 2 2 0 8 0
mbufpl 256 372 0 0 22 0 22 22 0 8 0
bufpl 280 4339 0 132 301 0 301 301 0 8 0
anonpl 16 78071 0 61001 96 13 83 85 0 124 14
amapchunkpl 152 3708 0 3559 22 15 7 20 0 158 0
amappl16 192 3085 0 2168 69 17 52 58 0 8 6
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 27 0 21 1 0 1 1 0 8 0
amappl13 168 451 0 446 1 0 1 1 0 8 0
amappl12 160 357 0 353 2 1 1 1 0 8 0
amappl11 152 58 0 42 1 0 1 1 0 8 0
amappl10 144 27 0 19 1 0 1 1 0 8 0
amappl9 136 387 0 386 1 0 1 1 0 8 0
amappl8 128 358 0 324 2 0 2 2 0 8 0
amappl7 120 117 0 106 1 0 1 1 0 8 0
amappl6 112 25 0 21 1 0 1 1 0 8 0
amappl5 104 563 0 547 1 0 1 1 0 8 0
amappl4 96 564 0 536 1 0 1 1 0 8 0
amappl3 88 119 0 114 1 0 1 1 0 8 0
amappl2 80 4654 0 4593 2 0 2 2 0 8 0
amappl1 72 23124 0 22698 23 13 10 18 0 8 0
amappl 80 1770 0 1723 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 30 0 0 1 0 1 1 0 8 0
uaddrrnd 24 665 0 642 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 665 0 642 1 0 1 1 0 8 0
vmmpekpl 168 9103 0 9066 2 0 2 2 0 8 0
vmmpepl 168 86729 0 84658 128 28 100 113 0 357 7
vmsppl 368 664 0 642 3 0 3 3 0 8 0
pdppl 4096 1337 0 1291 6 0 6 6 0 8 0
pvpl 32 237695 0 217565 211 14 197 199 0 265 34
pmappl 232 664 0 642 4 2 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 278 0 5 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff827a2ff0) 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fe76b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fe76b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828bfab0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ada760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eadf7d8,9,fffffd8066811500,0,0,ffff800020e4d9d0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e24a60, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff827a2ff0) 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fe76b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fe76b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828bfab0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828bfab0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cbb1800,1a4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ada760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eadf7d8,9,fffffd8066811500,0,0,ffff800020e4d9d0) at tcp_usrreq+0xa55
sosend(fffffd806eadf7d8,0,ffff800020e24b28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e4d9d0,4,ffff800020e24b28,0,ffff800020e24c10) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e4d9d0,ffff800020e24bc0,ffff800020e24c10) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e24c90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e24c90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffcc120, count: -19
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xb1: movl $0,%gs:0x530
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, count: 14
ddb{1}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffffa8f0, count: -1
---
This report is generated by a bot. It may contain errors.
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Anton Lindqvist
Jul 15, 2020, 3:21:23 PM7/15/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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