panic: WpARoNoIlN_Gc:a ScPhLe _iNOtTe mL_OmWaEgiREc_Dc OhNe cSkY: SCmbAuLfLp l2 7c9p1u 3f07r1e4e9 lEiXsItT m0o diaf
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syzbot
Jun 20, 2020, 12:43:10 PM6/20/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: c4b445c6 basic macro cleanup: .Fo for long .Fn lines, .Fa ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1126e8a1100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=2e584a2c06b0f8256046
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+2e584a...@syzkaller.appspotmail.com
login: panic: WpARoNoIlN_Gc:a ScPhLe _iNOtTe mL_OmWaEgiREc_Dc OhNe cSkY: SCmbAuLfLp l2 7c9p1u 3f07r1e4e9 lEiXsItT m0o diaf
ieStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*208219 25541 0 0x2 0 0 syz-executor.1
320429 66392 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd6180, 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 0xfffffd80767af900+16 0x0!=0x8bb4b9b005889491
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd6180, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800022301850
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff8199641f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x4ea0a712d2ea595a
r12 0
r13 0
r14 0xffff800020dedd48
r15 0
rip 0xffffffff81fd73f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff8000223017d0
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=208219 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=16, usrpri=58, nice=20
forw=0xffffffffffffffff, list=0xffff800020dec9c8,0xffff800020e0c508
process=0xffff800020e01348 user=0xffff8000222fc000, vmspace=0xfffffd807efff5c0
estcpu=36, cpticks=1, pctcpu=0.9
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
61483 505941 25541 0 2 0 syz-executor.1
*25541 208219 95409 0 7 0x2 syz-executor.1
18068 231699 95409 0 3 0x2 biowait syz-executor.0
95409 451885 75074 0 3 0x82 thrsleep syz-fuzzer
95409 397404 75074 0 3 0x4000082 nanosleep syz-fuzzer
95409 227180 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 290120 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 276312 75074 0 2 0x4000002 syz-fuzzer
95409 383314 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 102207 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 381861 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 94574 75074 0 3 0x4000082 nanosleep syz-fuzzer
95409 99424 75074 0 3 0x4000082 thrsleep syz-fuzzer
75074 257809 66392 0 3 0x10008a pause ksh
66392 320429 78553 0 7 0x12 sshd
73691 150645 1 0 3 0x100083 ttyin getty
78553 409003 1 0 3 0x80 select sshd
85868 512418 46923 74 3 0x100092 bpf pflogd
46923 503934 1 0 3 0x80 netio pflogd
16699 172443 98426 73 3 0x100090 kqread syslogd
98426 412554 1 0 3 0x100082 netio syslogd
53473 361745 1 77 3 0x100090 poll dhclient
95268 456078 1 0 3 0x80 poll dhclient
22405 371471 0 0 3 0x14200 bored smr
15077 357767 0 0 2 0x14200 zerothread
96492 393545 0 0 3 0x14200 aiodoned aiodoned
35664 118281 0 0 3 0x14200 syncer update
96000 488905 0 0 3 0x14200 cleaner cleaner
32073 272314 0 0 3 0x14200 reaper reaper
40281 452138 0 0 3 0x14200 pgdaemon pagedaemon
43086 516334 0 0 3 0x14200 bored crynlk
95529 308522 0 0 3 0x14200 bored crypto
64417 241685 0 0 3 0x40014200 acpi0 acpi0
88726 285347 0 0 3 0x40014200 idle1
92327 335626 0 0 2 0x14200 softnet
55710 331789 0 0 3 0x14200 bored systqmp
7829 58747 0 0 3 0x14200 bored systq
43427 175283 0 0 3 0x40014200 bored softclock
22917 229127 0 0 3 0x40014200 idle0
1 114017 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive sched_lock &sched_lock r = 1 (0xffffffff82906ea0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 wakeup_n+0x37 sys/kern/kern_synch.c:589
#2 uvm_pmr_getpages+0xd80 sys/uvm/uvm_pmemrange.c:1172
#3 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#4 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#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 mutex &uvm.fpageqlock r = 0 (0xffffffff828c83c0)
#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+0xd2c sys/uvm/uvm_pmemrange.c:1170
#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 25541 (syz-executor.1) thread 0xffff800020dedd48 (208219)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828b6e58)
#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 sched_lock &sched_lock r = 1 (0xffffffff82906ea0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 wakeup_n+0x37 sys/kern/kern_synch.c:589
#2 uvm_pmr_getpages+0xd80 sys/uvm/uvm_pmemrange.c:1172
#3 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#4 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#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 mutex &uvm.fpageqlock r = 0 (0xffffffff828c83c0)
#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+0xd2c sys/uvm/uvm_pmemrange.c:1170
#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 18068 (syz-executor.0) thread 0xffff800020dec9c8 (231699)
exclusive rrwlock inode r = 0 (0xfffffd806e30d2b8)
#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 (0xfffffd806875d700)
#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 cache_lookup+0x2bb sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1bc sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#9 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#10 namei+0x63c sys/kern/vfs_lookup.c:249
#11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
Process 66392 (sshd) thread 0xffff800020e5e010 (320429)
exclusive rwlock netlock r = 0 (0xffffffff82735468)
#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 9469 6396K 6657K 78643K 10636 0
pcb 13 8K 8K 78643K 29 0
rtable 83 2K 3K 78643K 249 0
ifaddr 38 9K 11K 78643K 78 0
counters 41 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1475 0
iov 0 0K 12K 78643K 4 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1243 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 10 0K 0K 78643K 20 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 84 0
proc 60 63K 95K 78643K 442 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 1 0
in_multi 22 1K 2K 78643K 41 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 212 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 114 22K 23K 78643K 1197 0
UVM aobj 3 2K 2K 78643K 6 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 8 0
NDP 5 0K 0K 78643K 17 0
temp 67 3844K 3909K 78643K 2163 0
kqueue 3 4K 4K 78643K 3 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 6 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 19 0 17 1 0 1 1 0 8 0
rtentry 112 49 0 16 2 0 2 2 0 8 0
unpcb 120 53 0 43 1 0 1 1 0 8 0
syncache 264 5 0 5 2 1 1 1 0 8 1
tcpqe 32 904 0 904 1 0 1 1 0 8 1
tcpcb 544 59 0 55 1 0 1 1 0 8 0
inpcb 280 152 0 145 2 0 2 2 0 8 1
nd6 48 7 0 4 1 0 1 1 0 8 0
pfstscr 40 1 0 0 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 20 0 0 1 0 1 1 0 8 0
pfstkey 112 20 0 0 1 0 1 1 0 8 0
pfstate 328 19 0 0 2 0 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 256 212 0 68 13 0 13 13 0 8 2
art_table 32 213 0 68 2 0 2 2 0 8 0
art_node 16 48 0 18 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0
semupl 112 6 0 6 1 0 1 1 0 8 1
semapl 112 14 0 6 1 0 1 1 0 8 0
shmpl 112 4 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1501 0 94 89 0 89 89 0 8 0
ffsino 272 1501 0 94 95 1 94 94 0 8 0
nchpl 144 1795 0 185 60 0 60 60 0 8 0
uvmvnodes 72 1558 0 0 29 0 29 29 0 8 0
vnodes 208 1558 0 0 82 0 82 82 0 8 0
namei 1024 4755 0 4755 2 1 1 1 0 8 1
percpumem 16 38 0 7 1 0 1 1 0 8 0
scxspl 192 5369 0 5368 8 1 7 7 0 8 6
plimitpl 152 17 0 9 1 0 1 1 0 8 0
sigapl 424 299 0 268 4 0 4 4 0 8 0
futexpl 56 909 0 909 1 0 1 1 0 8 1
knotepl 112 61 0 42 1 0 1 1 0 8 0
kqueuepl 144 2 0 0 1 0 1 1 0 8 0
pipelkpl 48 81 0 71 1 0 1 1 0 8 0
pipepl 120 162 0 143 1 0 1 1 0 8 0
fdescpl 496 284 0 268 3 0 3 3 0 8 0
filepl 152 1476 0 1375 6 1 5 5 0 8 1
lockfpl 104 24 0 23 1 0 1 1 0 8 0
lockfspl 48 8 0 7 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 20 0 9 1 0 1 1 0 8 0
ucredpl 96 87 0 78 1 0 1 1 0 8 0
zombiepl 144 268 0 268 2 1 1 1 0 8 1
processpl 984 299 0 268 6 1 5 5 0 8 1
procpl 624 433 0 393 4 0 4 4 0 8 0
sockpl 400 224 0 205 5 1 4 4 0 8 2
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 223 0 0 27 0 27 27 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 247 0 0 15 0 15 15 0 8 0
bufpl 280 3490 0 133 240 0 240 240 0 8 0
anonpl 16 41509 0 26213 63 1 62 62 0 124 0
amapchunkpl 152 1293 0 1151 8 0 8 8 0 158 1
amappl16 192 1133 0 313 42 0 42 42 0 8 0
amappl15 184 4 0 3 2 1 1 1 0 8 0
amappl14 176 24 0 20 1 0 1 1 0 8 0
amappl13 168 79 0 74 1 0 1 1 0 8 0
amappl12 160 16 0 14 1 0 1 1 0 8 0
amappl11 152 78 0 62 1 0 1 1 0 8 0
amappl10 144 17 0 12 1 0 1 1 0 8 0
amappl9 136 379 0 378 1 0 1 1 0 8 0
amappl8 128 347 0 313 2 0 2 2 0 8 0
amappl7 120 122 0 109 1 0 1 1 0 8 0
amappl6 112 48 0 45 1 0 1 1 0 8 0
amappl5 104 167 0 152 1 0 1 1 0 8 0
amappl4 96 519 0 490 1 0 1 1 0 8 0
amappl3 88 130 0 122 1 0 1 1 0 8 0
amappl2 80 1307 0 1246 2 0 2 2 0 8 0
amappl1 72 16125 0 15695 22 11 11 18 0 8 0
amappl 80 683 0 642 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 5 0 3 1 0 1 1 0 8 0
uaddrrnd 24 284 0 268 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 284 0 268 1 0 1 1 0 8 0
vmmpekpl 168 6251 0 6218 2 0 2 2 0 8 0
vmmpepl 168 41877 0 39934 119 7 112 112 0 357 23
vmsppl 368 283 0 268 2 0 2 2 0 8 0
pdppl 4096 575 0 536 7 1 6 6 0 8 1
pvpl 32 144924 0 126574 154 0 154 154 0 265 4
pmappl 232 283 0 268 2 0 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 272 0 7 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: 0x7f7ffffd6180, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d80ff0) 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(3f8,0,65) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,65) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,65) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff823e928b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e928b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82909988,2) 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(ffff800000ad6880) at tcp_output+0x14e6
tcp_usrreq(fffffd806ead9968,9,fffffd806f2bea00,0,0,ffff800020e5e010) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e19550, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d80ff0) 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(3f8,0,65) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,65) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,65) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff823e928b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e928b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82909988,2) 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(ffff800000ad6880) at tcp_output+0x14e6
tcp_usrreq(fffffd806ead9968,9,fffffd806f2bea00,0,0,ffff800020e5e010) at tcp_usrreq+0xa55
sosend(fffffd806ead9968,0,ffff800020e19618,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e5e010,4,ffff800020e19618,0,ffff800020e19700) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e5e010,ffff800020e196b0,ffff800020e19700) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e19780) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e19780) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc8c30, 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: c4b445c6 basic macro cleanup: .Fo for long .Fn lines, .Fa ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1126e8a1100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=2e584a2c06b0f8256046
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+2e584a...@syzkaller.appspotmail.com
login: panic: WpARoNoIlN_Gc:a ScPhLe _iNOtTe mL_OmWaEgiREc_Dc OhNe cSkY: SCmbAuLfLp l2 7c9p1u 3f07r1e4e9 lEiXsItT m0o diaf
ieStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*208219 25541 0 0x2 0 0 syz-executor.1
320429 66392 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd6180, 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 0xfffffd80767af900+16 0x0!=0x8bb4b9b005889491
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd6180, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800022301850
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff8199641f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x4ea0a712d2ea595a
r12 0
r13 0
r14 0xffff800020dedd48
r15 0
rip 0xffffffff81fd73f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff8000223017d0
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=208219 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=16, usrpri=58, nice=20
forw=0xffffffffffffffff, list=0xffff800020dec9c8,0xffff800020e0c508
process=0xffff800020e01348 user=0xffff8000222fc000, vmspace=0xfffffd807efff5c0
estcpu=36, cpticks=1, pctcpu=0.9
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
61483 505941 25541 0 2 0 syz-executor.1
*25541 208219 95409 0 7 0x2 syz-executor.1
18068 231699 95409 0 3 0x2 biowait syz-executor.0
95409 451885 75074 0 3 0x82 thrsleep syz-fuzzer
95409 397404 75074 0 3 0x4000082 nanosleep syz-fuzzer
95409 227180 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 290120 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 276312 75074 0 2 0x4000002 syz-fuzzer
95409 383314 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 102207 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 381861 75074 0 3 0x4000082 thrsleep syz-fuzzer
95409 94574 75074 0 3 0x4000082 nanosleep syz-fuzzer
95409 99424 75074 0 3 0x4000082 thrsleep syz-fuzzer
75074 257809 66392 0 3 0x10008a pause ksh
66392 320429 78553 0 7 0x12 sshd
73691 150645 1 0 3 0x100083 ttyin getty
78553 409003 1 0 3 0x80 select sshd
85868 512418 46923 74 3 0x100092 bpf pflogd
46923 503934 1 0 3 0x80 netio pflogd
16699 172443 98426 73 3 0x100090 kqread syslogd
98426 412554 1 0 3 0x100082 netio syslogd
53473 361745 1 77 3 0x100090 poll dhclient
95268 456078 1 0 3 0x80 poll dhclient
22405 371471 0 0 3 0x14200 bored smr
15077 357767 0 0 2 0x14200 zerothread
96492 393545 0 0 3 0x14200 aiodoned aiodoned
35664 118281 0 0 3 0x14200 syncer update
96000 488905 0 0 3 0x14200 cleaner cleaner
32073 272314 0 0 3 0x14200 reaper reaper
40281 452138 0 0 3 0x14200 pgdaemon pagedaemon
43086 516334 0 0 3 0x14200 bored crynlk
95529 308522 0 0 3 0x14200 bored crypto
64417 241685 0 0 3 0x40014200 acpi0 acpi0
88726 285347 0 0 3 0x40014200 idle1
92327 335626 0 0 2 0x14200 softnet
55710 331789 0 0 3 0x14200 bored systqmp
7829 58747 0 0 3 0x14200 bored systq
43427 175283 0 0 3 0x40014200 bored softclock
22917 229127 0 0 3 0x40014200 idle0
1 114017 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive sched_lock &sched_lock r = 1 (0xffffffff82906ea0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 wakeup_n+0x37 sys/kern/kern_synch.c:589
#2 uvm_pmr_getpages+0xd80 sys/uvm/uvm_pmemrange.c:1172
#3 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#4 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#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 mutex &uvm.fpageqlock r = 0 (0xffffffff828c83c0)
#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+0xd2c sys/uvm/uvm_pmemrange.c:1170
#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 25541 (syz-executor.1) thread 0xffff800020dedd48 (208219)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828b6e58)
#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 sched_lock &sched_lock r = 1 (0xffffffff82906ea0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 wakeup_n+0x37 sys/kern/kern_synch.c:589
#2 uvm_pmr_getpages+0xd80 sys/uvm/uvm_pmemrange.c:1172
#3 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#4 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#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 mutex &uvm.fpageqlock r = 0 (0xffffffff828c83c0)
#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+0xd2c sys/uvm/uvm_pmemrange.c:1170
#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 18068 (syz-executor.0) thread 0xffff800020dec9c8 (231699)
exclusive rrwlock inode r = 0 (0xfffffd806e30d2b8)
#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 (0xfffffd806875d700)
#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 cache_lookup+0x2bb sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1bc sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#9 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#10 namei+0x63c sys/kern/vfs_lookup.c:249
#11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
Process 66392 (sshd) thread 0xffff800020e5e010 (320429)
exclusive rwlock netlock r = 0 (0xffffffff82735468)
#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 9469 6396K 6657K 78643K 10636 0
pcb 13 8K 8K 78643K 29 0
rtable 83 2K 3K 78643K 249 0
ifaddr 38 9K 11K 78643K 78 0
counters 41 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1475 0
iov 0 0K 12K 78643K 4 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1243 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 10 0K 0K 78643K 20 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 84 0
proc 60 63K 95K 78643K 442 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 1 0
in_multi 22 1K 2K 78643K 41 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 212 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 114 22K 23K 78643K 1197 0
UVM aobj 3 2K 2K 78643K 6 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 8 0
NDP 5 0K 0K 78643K 17 0
temp 67 3844K 3909K 78643K 2163 0
kqueue 3 4K 4K 78643K 3 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 6 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 19 0 17 1 0 1 1 0 8 0
rtentry 112 49 0 16 2 0 2 2 0 8 0
unpcb 120 53 0 43 1 0 1 1 0 8 0
syncache 264 5 0 5 2 1 1 1 0 8 1
tcpqe 32 904 0 904 1 0 1 1 0 8 1
tcpcb 544 59 0 55 1 0 1 1 0 8 0
inpcb 280 152 0 145 2 0 2 2 0 8 1
nd6 48 7 0 4 1 0 1 1 0 8 0
pfstscr 40 1 0 0 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 20 0 0 1 0 1 1 0 8 0
pfstkey 112 20 0 0 1 0 1 1 0 8 0
pfstate 328 19 0 0 2 0 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 256 212 0 68 13 0 13 13 0 8 2
art_table 32 213 0 68 2 0 2 2 0 8 0
art_node 16 48 0 18 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0
semupl 112 6 0 6 1 0 1 1 0 8 1
semapl 112 14 0 6 1 0 1 1 0 8 0
shmpl 112 4 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1501 0 94 89 0 89 89 0 8 0
ffsino 272 1501 0 94 95 1 94 94 0 8 0
nchpl 144 1795 0 185 60 0 60 60 0 8 0
uvmvnodes 72 1558 0 0 29 0 29 29 0 8 0
vnodes 208 1558 0 0 82 0 82 82 0 8 0
namei 1024 4755 0 4755 2 1 1 1 0 8 1
percpumem 16 38 0 7 1 0 1 1 0 8 0
scxspl 192 5369 0 5368 8 1 7 7 0 8 6
plimitpl 152 17 0 9 1 0 1 1 0 8 0
sigapl 424 299 0 268 4 0 4 4 0 8 0
futexpl 56 909 0 909 1 0 1 1 0 8 1
knotepl 112 61 0 42 1 0 1 1 0 8 0
kqueuepl 144 2 0 0 1 0 1 1 0 8 0
pipelkpl 48 81 0 71 1 0 1 1 0 8 0
pipepl 120 162 0 143 1 0 1 1 0 8 0
fdescpl 496 284 0 268 3 0 3 3 0 8 0
filepl 152 1476 0 1375 6 1 5 5 0 8 1
lockfpl 104 24 0 23 1 0 1 1 0 8 0
lockfspl 48 8 0 7 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 20 0 9 1 0 1 1 0 8 0
ucredpl 96 87 0 78 1 0 1 1 0 8 0
zombiepl 144 268 0 268 2 1 1 1 0 8 1
processpl 984 299 0 268 6 1 5 5 0 8 1
procpl 624 433 0 393 4 0 4 4 0 8 0
sockpl 400 224 0 205 5 1 4 4 0 8 2
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 223 0 0 27 0 27 27 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 247 0 0 15 0 15 15 0 8 0
bufpl 280 3490 0 133 240 0 240 240 0 8 0
anonpl 16 41509 0 26213 63 1 62 62 0 124 0
amapchunkpl 152 1293 0 1151 8 0 8 8 0 158 1
amappl16 192 1133 0 313 42 0 42 42 0 8 0
amappl15 184 4 0 3 2 1 1 1 0 8 0
amappl14 176 24 0 20 1 0 1 1 0 8 0
amappl13 168 79 0 74 1 0 1 1 0 8 0
amappl12 160 16 0 14 1 0 1 1 0 8 0
amappl11 152 78 0 62 1 0 1 1 0 8 0
amappl10 144 17 0 12 1 0 1 1 0 8 0
amappl9 136 379 0 378 1 0 1 1 0 8 0
amappl8 128 347 0 313 2 0 2 2 0 8 0
amappl7 120 122 0 109 1 0 1 1 0 8 0
amappl6 112 48 0 45 1 0 1 1 0 8 0
amappl5 104 167 0 152 1 0 1 1 0 8 0
amappl4 96 519 0 490 1 0 1 1 0 8 0
amappl3 88 130 0 122 1 0 1 1 0 8 0
amappl2 80 1307 0 1246 2 0 2 2 0 8 0
amappl1 72 16125 0 15695 22 11 11 18 0 8 0
amappl 80 683 0 642 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 5 0 3 1 0 1 1 0 8 0
uaddrrnd 24 284 0 268 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 284 0 268 1 0 1 1 0 8 0
vmmpekpl 168 6251 0 6218 2 0 2 2 0 8 0
vmmpepl 168 41877 0 39934 119 7 112 112 0 357 23
vmsppl 368 283 0 268 2 0 2 2 0 8 0
pdppl 4096 575 0 536 7 1 6 6 0 8 1
pvpl 32 144924 0 126574 154 0 154 154 0 265 4
pmappl 232 283 0 268 2 0 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 272 0 7 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: 0x7f7ffffd6180, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d80ff0) 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(3f8,0,65) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,65) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,65) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff823e928b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e928b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82909988,2) 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(ffff800000ad6880) at tcp_output+0x14e6
tcp_usrreq(fffffd806ead9968,9,fffffd806f2bea00,0,0,ffff800020e5e010) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e19550, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d80ff0) 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(3f8,0,65) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,65) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,65) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff823e928b) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e928b) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82909988) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82909988,2) 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(ffff800000ad6880) at tcp_output+0x14e6
tcp_usrreq(fffffd806ead9968,9,fffffd806f2bea00,0,0,ffff800020e5e010) at tcp_usrreq+0xa55
sosend(fffffd806ead9968,0,ffff800020e19618,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020e5e010,4,ffff800020e19618,0,ffff800020e19700) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e5e010,ffff800020e196b0,ffff800020e19700) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e19780) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e19780) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc8c30, count: -19
---
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Anton Lindqvist
Jun 21, 2020, 3:50:31 AM6/21/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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