panic:WA RpNoIolNG_:ca SchPeL _NiOTt eLmO_WmEaRgiEcD _OcNh eScYkS:C AmLbLu fp2 l3 c1p7u6 7f1r2e2e 9 lEiXsIt T mo0d ai
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syzbot
Jul 15, 2020, 6:49:14 AM7/15/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: b536459a Print real/avail mem like we do on all other arch..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12baaa3b100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=827377205b208e05c25e
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+827377...@syzkaller.appspotmail.com
panic:WA RpNoIolNG_:ca SchPeL _NiOTt eLmO_WmEaRgiEcD _OcNh eScYkS:C AmLbLu fp2 l3 c1p7u6 7f1r2e2e 9 lEiXsIt T mo0d ai
fiStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 51926 31232 0 0x2 0 0 syz-executor.1
68307 83495 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, 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 0xfffffd806d362900+16 0x0!=0x2c6b99c32c4c0757
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020efadb0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff81bc9d4f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x1b6216ab73a0d71
r12 0
r13 0
r14 0xffff800020ddd5f8
r15 0
rip 0xffffffff819b33f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020efad30
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=51926 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=60, usrpri=60, nice=20
forw=0xffffffffffffffff, list=0xffff800020ddc278,0xffff800020ddd128
process=0xffff800020df0010 user=0xffff800020ef5000, vmspace=0xfffffd807f000cf0
estcpu=36, cpticks=1, pctcpu=0.18
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
33003 365612 31232 0 2 0 syz-executor.1
14933 98287 55294 0 3 0x2 biowait syz-executor.0
*31232 51926 55294 0 7 0x2 syz-executor.1
55294 210517 54620 0 3 0x82 thrsleep syz-fuzzer
55294 101510 54620 0 3 0x4000082 nanosleep syz-fuzzer
55294 183753 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 309520 54620 0 3 0x4000082 kqread syz-fuzzer
55294 195361 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 448572 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 385572 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 440980 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 475360 54620 0 3 0x4000082 nanosleep syz-fuzzer
55294 387092 54620 0 3 0x4000082 thrsleep syz-fuzzer
54620 323724 83495 0 3 0x10008a pause ksh
83495 68307 19407 0 7 0x12 sshd
73670 120967 1 0 3 0x100083 ttyin getty
19407 92585 1 0 3 0x80 select sshd
55692 359294 7110 74 3 0x100092 bpf pflogd
7110 370358 1 0 3 0x80 netio pflogd
88006 111862 37528 73 3 0x100090 kqread syslogd
37528 361666 1 0 3 0x100082 netio syslogd
74797 523304 1 77 3 0x100090 poll dhclient
53544 191163 1 0 3 0x80 poll dhclient
42909 94140 0 0 3 0x14200 bored smr
54788 319627 0 0 2 0x14200 zerothread
24614 514742 0 0 3 0x14200 aiodoned aiodoned
45271 277923 0 0 3 0x14200 syncer update
69233 101431 0 0 3 0x14200 cleaner cleaner
39719 97305 0 0 3 0x14200 reaper reaper
98081 301057 0 0 3 0x14200 pgdaemon pagedaemon
75227 516223 0 0 3 0x14200 bored crynlk
65804 302231 0 0 3 0x14200 bored crypto
44741 95549 0 0 3 0x40014200 acpi0 acpi0
30309 474144 0 0 3 0x40014200 idle1
17584 247329 0 0 3 0x14200 bored softnet
11960 233929 0 0 3 0x14200 bored systqmp
5299 7222 0 0 3 0x14200 bored systq
88314 217944 0 0 3 0x40014200 bored softclock
22853 282771 0 0 3 0x40014200 idle0
1 187506 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 (0xffffffff8290aa80)
#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 (0xffffffff8292ead8)
#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 14933 (syz-executor.0) thread 0xffff800020ddd118 (98287)
exclusive rrwlock inode r = 0 (0xfffffd8064955e70)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b1fb4d8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
Process 31232 (syz-executor.1) thread 0xffff800020ddd5f8 (51926)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8292e770)
#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 (0xffffffff8290aa80)
#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 (0xffffffff8292ead8)
#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 83495 (sshd) thread 0xffff800020e40ae0 (68307)
exclusive rwlock netlock r = 0 (0xffffffff82709b58)
#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{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9481 6402K 6854K 78643K 10735 0
pcb 13 8K 8K 78643K 41 0
rtable 113 12K 12K 78643K 244 0
ifaddr 50 11K 12K 78643K 68 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1511 0
iov 0 0K 16K 78643K 11 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1268 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 18 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 126 0
proc 61 63K 95K 78643K 445 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 33 2K 2K 78643K 36 0
ether_multi 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 37 175K 175K 78643K 37 0
exec 0 0K 1K 78643K 211 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 113 38K 38K 78643K 1319 0
UVM aobj 9 2K 2K 78643K 9 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 24 0
NDP 7 0K 0K 78643K 13 0
temp 77 3856K 3921K 78643K 2476 0
kqueue 3 4K 6K 78643K 12 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 0 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 46 0 1 2 0 2 2 0 8 0
unpcb 120 110 0 100 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 96 0 96 2 1 1 1 0 8 1
tcpcb 544 46 0 41 1 0 1 1 0 8 0
inpcb 296 232 0 224 2 0 2 2 0 8 1
nd6 48 7 0 0 1 0 1 1 0 8 0
pfstscr 40 4 0 2 1 0 1 1 0 8 0
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 23 0 0 1 0 1 1 0 8 0
pfstkey 112 25 0 2 1 0 1 1 0 8 0
pfstate 328 23 0 1 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 256 195 0 0 13 0 13 13 0 8 0
art_table 32 196 0 0 2 0 2 2 0 8 0
art_node 16 45 0 4 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 6 1 0 1 1 0 8 0
semapl 112 16 0 6 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1555 0 146 89 0 89 89 0 8 0
ffsino 272 1555 0 146 95 0 95 95 0 8 0
nchpl 144 1890 0 282 60 0 60 60 0 8 0
uvmvnodes 72 1632 0 0 30 0 30 30 0 8 0
vnodes 208 1632 0 0 86 0 86 86 0 8 0
namei 1024 5074 0 5073 1 0 1 1 0 8 0
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
scxspl 192 5832 0 5831 6 1 5 5 0 8 4
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 424 341 0 310 4 0 4 4 0 8 0
futexpl 56 1596 0 1596 1 0 1 1 0 8 1
knotepl 112 69 0 50 1 0 1 1 0 8 0
kqueuepl 144 17 0 15 1 0 1 1 0 8 0
pipepl 304 87 0 77 2 0 2 2 0 8 1
fdescpl 496 326 0 310 3 0 3 3 0 8 0
filepl 152 1829 0 1729 5 0 5 5 0 8 1
lockfpl 104 61 0 60 1 0 1 1 0 8 0
lockfspl 48 22 0 21 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 140 0 131 1 0 1 1 0 8 0
zombiepl 144 310 0 310 1 0 1 1 0 8 1
processpl 992 341 0 310 5 0 5 5 0 8 1
procpl 624 554 0 514 4 0 4 4 0 8 0
sockpl 400 371 0 351 4 0 4 4 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 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 6 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 185 0 0 23 0 23 23 0 8 0
mtagpl 96 16 0 0 1 0 1 1 0 8 0
mbufpl 256 271 0 0 16 0 16 16 0 8 0
bufpl 280 3626 0 135 250 0 250 250 0 8 0
anonpl 16 45603 0 29065 69 1 68 68 0 124 0
amapchunkpl 152 1594 0 1451 9 0 9 9 0 158 2
amappl16 192 1429 0 536 46 0 46 46 0 8 1
amappl15 184 1 0 1 1 1 0 1 0 8 0
amappl14 176 22 0 19 1 0 1 1 0 8 0
amappl13 168 121 0 116 1 0 1 1 0 8 0
amappl12 160 6 0 6 2 2 0 1 0 8 0
amappl11 152 56 0 40 1 0 1 1 0 8 0
amappl10 144 35 0 27 1 0 1 1 0 8 0
amappl9 136 299 0 297 1 0 1 1 0 8 0
amappl8 128 352 0 323 2 0 2 2 0 8 0
amappl7 120 117 0 106 1 0 1 1 0 8 0
amappl6 112 30 0 23 2 1 1 1 0 8 0
amappl5 104 396 0 382 1 0 1 1 0 8 0
amappl4 96 580 0 550 1 0 1 1 0 8 0
amappl3 88 104 0 99 1 0 1 1 0 8 0
amappl2 80 1649 0 1585 2 0 2 2 0 8 0
amappl1 72 17157 0 16729 23 12 11 18 0 8 1
amappl 80 808 0 765 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 8 0 0 1 0 1 1 0 8 0
uaddrrnd 24 328 0 310 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 328 0 310 1 0 1 1 0 8 0
vmmpekpl 168 6476 0 6443 2 0 2 2 0 8 0
vmmpepl 168 47521 0 45493 121 8 113 113 0 357 21
vmsppl 368 327 0 310 2 0 2 2 0 8 0
pdppl 4096 663 0 622 6 0 6 6 0 8 0
pvpl 32 155050 0 135458 167 0 167 167 0 265 5
pmappl 232 327 0 310 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 266 0 3 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: 0x7f7ffffdfcd0, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) 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(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fee01) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fee01) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828c79e0,2) 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(ffff800000ada320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eadee18,9,fffffd806d362400,0,0,ffff800020e40ae0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e04350, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) 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(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fee01) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fee01) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828c79e0,2) 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(ffff800000ada320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eadee18,9,fffffd806d362400,0,0,ffff800020e40ae0) at tcp_usrreq+0xa55
sosend(fffffd806eadee18,0,ffff800020e04418,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e40ae0,4,ffff800020e04418,0,ffff800020e04500) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e40ae0,ffff800020e044b0,ffff800020e04500) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e04580) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e04580) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc7a60, count: -19
---
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: b536459a Print real/avail mem like we do on all other arch..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12baaa3b100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=827377205b208e05c25e
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+827377...@syzkaller.appspotmail.com
panic:WA RpNoIolNG_:ca SchPeL _NiOTt eLmO_WmEaRgiEcD _OcNh eScYkS:C AmLbLu fp2 l3 c1p7u6 7f1r2e2e 9 lEiXsIt T mo0d ai
fiStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 51926 31232 0 0x2 0 0 syz-executor.1
68307 83495 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, 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 0xfffffd806d362900+16 0x0!=0x2c6b99c32c4c0757
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020efadb0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff81bc9d4f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x1b6216ab73a0d71
r12 0
r13 0
r14 0xffff800020ddd5f8
r15 0
rip 0xffffffff819b33f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020efad30
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=51926 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=60, usrpri=60, nice=20
forw=0xffffffffffffffff, list=0xffff800020ddc278,0xffff800020ddd128
process=0xffff800020df0010 user=0xffff800020ef5000, vmspace=0xfffffd807f000cf0
estcpu=36, cpticks=1, pctcpu=0.18
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
33003 365612 31232 0 2 0 syz-executor.1
14933 98287 55294 0 3 0x2 biowait syz-executor.0
*31232 51926 55294 0 7 0x2 syz-executor.1
55294 210517 54620 0 3 0x82 thrsleep syz-fuzzer
55294 101510 54620 0 3 0x4000082 nanosleep syz-fuzzer
55294 183753 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 309520 54620 0 3 0x4000082 kqread syz-fuzzer
55294 195361 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 448572 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 385572 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 440980 54620 0 3 0x4000082 thrsleep syz-fuzzer
55294 475360 54620 0 3 0x4000082 nanosleep syz-fuzzer
55294 387092 54620 0 3 0x4000082 thrsleep syz-fuzzer
54620 323724 83495 0 3 0x10008a pause ksh
83495 68307 19407 0 7 0x12 sshd
73670 120967 1 0 3 0x100083 ttyin getty
19407 92585 1 0 3 0x80 select sshd
55692 359294 7110 74 3 0x100092 bpf pflogd
7110 370358 1 0 3 0x80 netio pflogd
88006 111862 37528 73 3 0x100090 kqread syslogd
37528 361666 1 0 3 0x100082 netio syslogd
74797 523304 1 77 3 0x100090 poll dhclient
53544 191163 1 0 3 0x80 poll dhclient
42909 94140 0 0 3 0x14200 bored smr
54788 319627 0 0 2 0x14200 zerothread
24614 514742 0 0 3 0x14200 aiodoned aiodoned
45271 277923 0 0 3 0x14200 syncer update
69233 101431 0 0 3 0x14200 cleaner cleaner
39719 97305 0 0 3 0x14200 reaper reaper
98081 301057 0 0 3 0x14200 pgdaemon pagedaemon
75227 516223 0 0 3 0x14200 bored crynlk
65804 302231 0 0 3 0x14200 bored crypto
44741 95549 0 0 3 0x40014200 acpi0 acpi0
30309 474144 0 0 3 0x40014200 idle1
17584 247329 0 0 3 0x14200 bored softnet
11960 233929 0 0 3 0x14200 bored systqmp
5299 7222 0 0 3 0x14200 bored systq
88314 217944 0 0 3 0x40014200 bored softclock
22853 282771 0 0 3 0x40014200 idle0
1 187506 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 (0xffffffff8290aa80)
#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 (0xffffffff8292ead8)
#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 14933 (syz-executor.0) thread 0xffff800020ddd118 (98287)
exclusive rrwlock inode r = 0 (0xfffffd8064955e70)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b1fb4d8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
Process 31232 (syz-executor.1) thread 0xffff800020ddd5f8 (51926)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8292e770)
#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 (0xffffffff8290aa80)
#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 (0xffffffff8292ead8)
#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 83495 (sshd) thread 0xffff800020e40ae0 (68307)
exclusive rwlock netlock r = 0 (0xffffffff82709b58)
#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{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9481 6402K 6854K 78643K 10735 0
pcb 13 8K 8K 78643K 41 0
rtable 113 12K 12K 78643K 244 0
ifaddr 50 11K 12K 78643K 68 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1511 0
iov 0 0K 16K 78643K 11 0
mount 1 1K 1K 78643K 1 0
vnodes 1222 77K 77K 78643K 1268 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 18 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 126 0
proc 61 63K 95K 78643K 445 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 33 2K 2K 78643K 36 0
ether_multi 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 37 175K 175K 78643K 37 0
exec 0 0K 1K 78643K 211 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 113 38K 38K 78643K 1319 0
UVM aobj 9 2K 2K 78643K 9 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 24 0
NDP 7 0K 0K 78643K 13 0
temp 77 3856K 3921K 78643K 2476 0
kqueue 3 4K 6K 78643K 12 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 0 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 46 0 1 2 0 2 2 0 8 0
unpcb 120 110 0 100 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 96 0 96 2 1 1 1 0 8 1
tcpcb 544 46 0 41 1 0 1 1 0 8 0
inpcb 296 232 0 224 2 0 2 2 0 8 1
nd6 48 7 0 0 1 0 1 1 0 8 0
pfstscr 40 4 0 2 1 0 1 1 0 8 0
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 23 0 0 1 0 1 1 0 8 0
pfstkey 112 25 0 2 1 0 1 1 0 8 0
pfstate 328 23 0 1 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 256 195 0 0 13 0 13 13 0 8 0
art_table 32 196 0 0 2 0 2 2 0 8 0
art_node 16 45 0 4 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 6 1 0 1 1 0 8 0
semapl 112 16 0 6 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1555 0 146 89 0 89 89 0 8 0
ffsino 272 1555 0 146 95 0 95 95 0 8 0
nchpl 144 1890 0 282 60 0 60 60 0 8 0
uvmvnodes 72 1632 0 0 30 0 30 30 0 8 0
vnodes 208 1632 0 0 86 0 86 86 0 8 0
namei 1024 5074 0 5073 1 0 1 1 0 8 0
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
scxspl 192 5832 0 5831 6 1 5 5 0 8 4
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 424 341 0 310 4 0 4 4 0 8 0
futexpl 56 1596 0 1596 1 0 1 1 0 8 1
knotepl 112 69 0 50 1 0 1 1 0 8 0
kqueuepl 144 17 0 15 1 0 1 1 0 8 0
pipepl 304 87 0 77 2 0 2 2 0 8 1
fdescpl 496 326 0 310 3 0 3 3 0 8 0
filepl 152 1829 0 1729 5 0 5 5 0 8 1
lockfpl 104 61 0 60 1 0 1 1 0 8 0
lockfspl 48 22 0 21 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 140 0 131 1 0 1 1 0 8 0
zombiepl 144 310 0 310 1 0 1 1 0 8 1
processpl 992 341 0 310 5 0 5 5 0 8 1
procpl 624 554 0 514 4 0 4 4 0 8 0
sockpl 400 371 0 351 4 0 4 4 0 8 1
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 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 6 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 185 0 0 23 0 23 23 0 8 0
mtagpl 96 16 0 0 1 0 1 1 0 8 0
mbufpl 256 271 0 0 16 0 16 16 0 8 0
bufpl 280 3626 0 135 250 0 250 250 0 8 0
anonpl 16 45603 0 29065 69 1 68 68 0 124 0
amapchunkpl 152 1594 0 1451 9 0 9 9 0 158 2
amappl16 192 1429 0 536 46 0 46 46 0 8 1
amappl15 184 1 0 1 1 1 0 1 0 8 0
amappl14 176 22 0 19 1 0 1 1 0 8 0
amappl13 168 121 0 116 1 0 1 1 0 8 0
amappl12 160 6 0 6 2 2 0 1 0 8 0
amappl11 152 56 0 40 1 0 1 1 0 8 0
amappl10 144 35 0 27 1 0 1 1 0 8 0
amappl9 136 299 0 297 1 0 1 1 0 8 0
amappl8 128 352 0 323 2 0 2 2 0 8 0
amappl7 120 117 0 106 1 0 1 1 0 8 0
amappl6 112 30 0 23 2 1 1 1 0 8 0
amappl5 104 396 0 382 1 0 1 1 0 8 0
amappl4 96 580 0 550 1 0 1 1 0 8 0
amappl3 88 104 0 99 1 0 1 1 0 8 0
amappl2 80 1649 0 1585 2 0 2 2 0 8 0
amappl1 72 17157 0 16729 23 12 11 18 0 8 1
amappl 80 808 0 765 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 8 0 0 1 0 1 1 0 8 0
uaddrrnd 24 328 0 310 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 328 0 310 1 0 1 1 0 8 0
vmmpekpl 168 6476 0 6443 2 0 2 2 0 8 0
vmmpepl 168 47521 0 45493 121 8 113 113 0 357 21
vmsppl 368 327 0 310 2 0 2 2 0 8 0
pdppl 4096 663 0 622 6 0 6 6 0 8 0
pvpl 32 155050 0 135458 167 0 167 167 0 265 5
pmappl 232 327 0 310 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 266 0 3 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: 0x7f7ffffdfcd0, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) 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(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fee01) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fee01) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828c79e0,2) 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(ffff800000ada320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eadee18,9,fffffd806d362400,0,0,ffff800020e40ae0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e04350, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) 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(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fee01) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fee01) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828c79e0,2) 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(ffff800000ada320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eadee18,9,fffffd806d362400,0,0,ffff800020e40ae0) at tcp_usrreq+0xa55
sosend(fffffd806eadee18,0,ffff800020e04418,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e40ae0,4,ffff800020e04418,0,ffff800020e04500) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e40ae0,ffff800020e044b0,ffff800020e04500) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e04580) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e04580) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc7a60, count: -19
---
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Anton Lindqvist
Jul 15, 2020, 3:21:15 PM7/15/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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