panic(ADDR) at panic+0x15c
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syzbot
Dec 6, 2019, 7:53:08 AM12/6/19
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 45d8925e bring the __func__
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1003cb7ae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=867ac52c5b4f0db8e2b1
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+867ac5...@syzkaller.appspotmail.com
panic(ffffffff822419e2) at panic+0x15c sys/kern/subr_prf.c:207
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
m_getptr sys/kern/uipc_mbuf.c:1031 [inline]
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
sys/kern/uipc_mbuf.c:722
ip6_pullexthdr(fffffd8066617900,6f8,0) at ip6_pullexthdr+0x16f
sys/netinet6/ip6_input.c:1149
ip6_savecontrol(fffffd806f66a348,fffffd8066617900,ffff800020b60b60) at
ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1036
rip6_input(ffff800020b60db8,ffff800020b60dc4,0,18) at rip6_input+0x7e7
sys/netinet6/raw_ip6.c:225
ip_deliver(ffff800020b60db8,ffff800020b60dc4,0,18) at ip_deliver+0x353
sys/netinet/ip_input.c:665
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb ip6_ours sys/netinet6/ip6_input.c:518 [inline]
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb sys/netinet6/ip6_input.c:340
ipv6_input(ffff800000670000,fffffd8066617900) at ipv6_input+0x48
sys/netinet6/ip6_input.c:171
if_input_local(ffff800000670000,fffffd8066617900,18) at
if_input_local+0x121 sys/net/if.c:781
ip6_output(fffffd8061ac6b00,ffff800000a14400,fffffd806f66a700,0,0,fffffd806f66a690)
at
ip6_output+0xd26
rip6_output(fffffd8061ac6b00,fffffd8064c5d198,ffff800020b61120,0) at
rip6_output+0x4c0 sys/netinet6/raw_ip6.c:481
rip6_usrreq(fffffd8064c5d198,9,fffffd8061ac6b00,0,0,ffff800020ade2a0) at
rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670
sosend(fffffd8064c5d198,0,ffff800020b61368,0,0,0) at sosend+0x645
sys/kern/uipc_socket.c:524
end trace frame: 0xffff800020b61350, count: 0
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
m_copydata: null mbuf
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff822419e2) at panic+0x15c sys/kern/subr_prf.c:207
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
m_getptr sys/kern/uipc_mbuf.c:1031 [inline]
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
sys/kern/uipc_mbuf.c:722
ip6_pullexthdr(fffffd8066617900,6f8,0) at ip6_pullexthdr+0x16f
sys/netinet6/ip6_input.c:1149
ip6_savecontrol(fffffd806f66a348,fffffd8066617900,ffff800020b60b60) at
ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1036
rip6_input(ffff800020b60db8,ffff800020b60dc4,0,18) at rip6_input+0x7e7
sys/netinet6/raw_ip6.c:225
ip_deliver(ffff800020b60db8,ffff800020b60dc4,0,18) at ip_deliver+0x353
sys/netinet/ip_input.c:665
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb ip6_ours sys/netinet6/ip6_input.c:518 [inline]
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb sys/netinet6/ip6_input.c:340
ipv6_input(ffff800000670000,fffffd8066617900) at ipv6_input+0x48
sys/netinet6/ip6_input.c:171
if_input_local(ffff800000670000,fffffd8066617900,18) at
if_input_local+0x121 sys/net/if.c:781
ip6_output(fffffd8061ac6b00,ffff800000a14400,fffffd806f66a700,0,0,fffffd806f66a690)
at
ip6_output+0xd26
rip6_output(fffffd8061ac6b00,fffffd8064c5d198,ffff800020b61120,0) at
rip6_output+0x4c0 sys/netinet6/raw_ip6.c:481
rip6_usrreq(fffffd8064c5d198,9,fffffd8061ac6b00,0,0,ffff800020ade2a0) at
rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670
sosend(fffffd8064c5d198,0,ffff800020b61368,0,0,0) at sosend+0x645
sys/kern/uipc_socket.c:524
dofilewritev(ffff800020ade2a0,5,ffff800020b61368,0,ffff800020b61450) at
dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020ade2a0,ffff800020b61408,ffff800020b61450) at
sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff800020b614d0) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b614d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x48dcb63c60, count: -18
ddb{0}> show registers
rdi 0xffffffff81cee8a7 db_enter+0x17
rsi 0x57a8 __ALIGN_SIZE+0x47a8
rbp 0xffff800020b608d0
rbx 0xffff800020b60980
rdx 0x57a9 __ALIGN_SIZE+0x47a9
rcx 0xffff800021d94000
rax 0xffff800021d94000
r8 0xffffffff81ff23ef kprintf+0x16f
r9 0x1
r10 0x25
r11 0xe9aa1b71e8ee4ed2
r12 0x3000000008
r13 0xffff800020b608e0
r14 0x100
r15 0x1
rip 0xffffffff81cee8a8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b608c0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=238273 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=77, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020ade518,0xffffffff82613fb8
process=0xffff800020aec700 user=0xffff800020b5c000,
vmspace=0xfffffd807f008170
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
35590 152309 10897 0 2 0 syz-executor.0
*35590 238273 10897 0 7 0x4000000 syz-executor.0
17261 292800 0 0 3 0x14200 bored sosplice
10897 465152 9896 0 3 0x82 nanosleep syz-executor.0
50338 205458 9896 0 2 0x2 syz-executor.1
9896 175781 22058 0 3 0x82 thrsleep syz-fuzzer
9896 449666 22058 0 3 0x4000082 nanosleep syz-fuzzer
9896 151486 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 396639 22058 0 3 0x4000082 nanosleep syz-fuzzer
9896 321692 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 158539 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 349634 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 373326 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 43382 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 145541 22058 0 7 0x4000002 syz-fuzzer
22058 175821 27953 0 3 0x10008a pause ksh
27953 254092 22759 0 3 0x92 select sshd
78491 486498 1 0 3 0x100083 ttyin getty
22759 5131 1 0 3 0x80 select sshd
7777 154836 29186 74 3 0x100092 bpf pflogd
29186 46686 1 0 3 0x80 netio pflogd
40469 269474 8586 73 3 0x100090 kqread syslogd
8586 189529 1 0 3 0x100082 netio syslogd
78528 362419 1 77 3 0x100090 poll dhclient
86262 484380 1 0 3 0x80 poll dhclient
16878 401146 0 0 2 0x14200 zerothread
27524 188221 0 0 3 0x14200 aiodoned aiodoned
95371 332937 0 0 3 0x14200 syncer update
63372 198551 0 0 3 0x14200 cleaner cleaner
72955 552 0 0 3 0x14200 reaper reaper
82594 337626 0 0 3 0x14200 pgdaemon pagedaemon
1070 402358 0 0 3 0x14200 bored crynlk
68647 113163 0 0 3 0x14200 bored crypto
16789 176641 0 0 3 0x40014200 acpi0 acpi0
13013 447808 0 0 3 0x40014200 idle1
48473 20473 0 0 3 0x14200 bored softnet
21563 51289 0 0 3 0x14200 bored systqmp
51709 394148 0 0 3 0x14200 bored systq
78999 238918 0 0 3 0x40014200 bored softclock
25285 513044 0 0 3 0x40014200 idle0
25881 433550 0 0 3 0x14200 bored smr
1 352380 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 1:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82651b08)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:822
#4 uvm_pagealloc+0x283 sys/uvm/uvm_page.c:923
#5 uvm_fault+0xfdd
#6 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#7 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#8 recall_trap+0x8
Process 35590 (syz-executor.0) thread 0xffff800020ade2a0 (238273)
exclusive rwlock netlock r = 0 (0xffffffff824a3a38)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x51b sys/kern/uipc_socket.c:512
#3 dofilewritev+0x1b7 sys/kern/sys_generic.c:364
#4 sys_write+0x83 sys/kern/sys_generic.c:284
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6 Xsyscall+0x128
Process 9896 (syz-fuzzer) thread 0xffff800020ac13d8 (145541)
shared rwlock vmmaplk r = 0 (0xfffffd806e7aa020)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
#2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524
#3 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#5 recall_trap+0x8
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8260a4c0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 pageflttrap+0x6f sys/arch/amd64/amd64/trap.c:162
#2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#3 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9531 6679K 7305K 78643K 11595 0
pcb 17 8K 8K 78643K 89 0
rtable 113 4K 4K 78643K 359 0
ifaddr 67 13K 13K 78643K 123 0
counters 39 33K 33K 78643K 39 0
ioctlops 0 0K 4K 78643K 1477 0
iov 0 0K 16K 78643K 43 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1485 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 83 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 239 0
sigio 0 0K 0K 78643K 2 0
proc 60 63K 95K 78643K 502 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 15 0
in_multi 52 3K 3K 78643K 89 0
ether_multi 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 42 185K 185K 78643K 42 0
exec 0 0K 1K 78643K 255 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 22K 23K 78643K 1811 0
UVM aobj 41 2K 2K 78643K 43 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 4 0K 0K 78643K 69 0
NDP 11 0K 0K 78643K 28 0
temp 132 3019K 3090K 78643K 7210 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 10 0 4 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 41 0 39 1 0 1 1 0
8 0
rtentry 112 70 0 25 2 0 2 2 0
8 0
unpcb 120 125 0 115 1 0 1 1 0
8 0
syncache 264 10 0 10 2 1 1 1 0
8 1
tcpqe 32 127 0 127 2 1 1 1 0
8 1
tcpcb 544 175 0 169 2 0 2 2 0
8 1
inpcb 280 410 0 398 2 0 2 2 0
8 1
nd6 48 8 0 4 1 0 1 1 0
8 0
ppxss 1128 7 0 7 1 1 0 1 0
8 0
pffrag 232 8 0 8 2 1 1 1 0
482 1
pffrnode 88 8 0 8 2 1 1 1 0
8 1
pffrent 40 233 0 233 2 1 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 46 0 4 1 0 1 1 0
8 0
pfstkey 112 46 0 4 2 0 2 2 0
8 0
pfstate 328 46 0 3 4 0 4 4 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 2 0 0 2 0 2 2 0
8 0
art_heap4 256 326 0 100 16 1 15 15 0
8 0
art_table 32 328 0 100 2 0 2 2 0
8 0
art_node 16 69 0 28 1 0 1 1 0
8 0
sysvmsgpl 40 48 0 28 1 0 1 1 0
8 0
semupl 112 4 0 4 1 1 0 1 0
8 0
semapl 112 81 0 71 1 0 1 1 0
8 0
shmpl 112 41 0 2 2 0 2 2 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1753 0 344 46 0 46 46 0
8 0
ffsino 272 1753 0 344 95 0 95 95 0
8 0
nchpl 144 2327 0 719 61 0 61 61 0
8 0
uvmvnodes 72 2017 0 0 37 0 37 37 0
8 0
vnodes 208 2017 0 0 107 0 107 107 0
8 0
namei 1024 6765 0 6765 1 0 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 6904 0 6904 8 5 3 7 0
8 3
plimitpl 152 42 0 34 1 0 1 1 0
8 0
sigapl 432 435 0 420 3 1 2 3 0
8 0
futexpl 56 5637 0 5637 1 0 1 1 0
8 1
knotepl 112 95 0 76 1 0 1 1 0
8 0
kqueuepl 104 95 0 93 1 0 1 1 0
8 0
pipepl 160 278 0 259 3 1 2 2 0
8 1
fdescpl 488 436 0 420 3 0 3 3 0
8 0
filepl 152 3165 0 3061 6 0 6 6 0
8 2
lockfpl 104 147 0 146 1 0 1 1 0
8 0
lockfspl 48 33 0 32 1 0 1 1 0
8 0
sessionpl 112 19 0 8 1 0 1 1 0
8 0
pgrppl 48 26 0 15 1 0 1 1 0
8 0
ucredpl 96 230 0 221 1 0 1 1 0
8 0
zombiepl 144 420 0 420 1 0 1 1 0
8 1
processpl 896 452 0 420 4 0 4 4 0
8 0
procpl 632 945 0 903 6 1 5 5 0
8 0
sosppl 128 4 0 4 1 0 1 1 0
8 1
sockpl 384 589 0 565 4 0 4 4 0
8 1
mcl64k 65536 7 0 0 1 0 1 1 0
8 0
mcl16k 16384 1 0 0 1 0 1 1 0
8 0
mcl12k 12288 3 0 0 1 0 1 1 0
8 0
mcl9k 9216 2 0 0 1 0 1 1 0
8 0
mcl8k 8192 5 0 0 1 0 1 1 0
8 0
mcl4k 4096 6 0 0 1 0 1 1 0
8 0
mcl2k2 2112 2 0 0 1 0 1 1 0
8 0
mcl2k 2048 166 0 0 20 0 20 20 0
8 0
mtagpl 80 18 0 0 1 0 1 1 0
8 0
mbufpl 256 294 0 0 18 0 18 18 0
8 0
bufpl 280 7100 0 1342 412 0 412 412 0
8 0
anonpl 16 60208 0 42246 82 1 81 81 0
125 1
amapchunkpl 152 2619 0 2473 12 0 12 12 0
158 5
amappl16 192 1994 0 926 55 0 55 55 0
8 1
amappl15 184 215 0 212 1 0 1 1 0
8 0
amappl14 176 42 0 38 1 0 1 1 0
8 0
amappl13 168 93 0 91 1 0 1 1 0
8 0
amappl12 160 4 0 3 1 0 1 1 0
8 0
amappl11 152 60 0 44 1 0 1 1 0
8 0
amappl10 144 14 0 10 1 0 1 1 0
8 0
amappl9 136 649 0 643 1 0 1 1 0
8 0
amappl8 128 167 0 132 2 0 2 2 0
8 0
amappl7 120 109 0 97 1 0 1 1 0
8 0
amappl6 112 64 0 54 1 0 1 1 0
8 0
amappl5 104 133 0 119 1 0 1 1 0
8 0
amappl4 96 777 0 747 1 0 1 1 0
8 0
amappl3 88 130 0 122 1 0 1 1 0
8 0
amappl2 80 2599 0 2525 3 1 2 3 0
8 0
amappl1 72 19579 0 19134 26 16 10 21 0
8 0
amappl 80 1224 0 1176 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 42 0 2 1 0 1 1 0
8 0
uaddrrnd 24 436 0 420 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 436 0 420 1 0 1 1 0
8 0
vmmpekpl 168 7493 0 7460 3 1 2 2 0
8 0
vmmpepl 168 62272 0 60013 150 9 141 141 0 357
40
vmsppl 368 435 0 420 2 0 2 2 0
8 0
pdppl 4096 879 0 840 6 0 6 6 0
8 1
pvpl 32 193157 0 172016 192 0 192 192 0
265 8
pmappl 232 435 0 420 2 1 1 2 0
8 0
extentpl 40 46 0 29 1 0 1 1 0
8 0
phpool 112 173 0 4 5 0 5 5 0
8 0
---
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: 45d8925e bring the __func__
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1003cb7ae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=26ca0a9c07f16a3a
dashboard link: https://syzkaller.appspot.com/bug?extid=867ac52c5b4f0db8e2b1
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+867ac5...@syzkaller.appspotmail.com
panic(ffffffff822419e2) at panic+0x15c sys/kern/subr_prf.c:207
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
m_getptr sys/kern/uipc_mbuf.c:1031 [inline]
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
sys/kern/uipc_mbuf.c:722
ip6_pullexthdr(fffffd8066617900,6f8,0) at ip6_pullexthdr+0x16f
sys/netinet6/ip6_input.c:1149
ip6_savecontrol(fffffd806f66a348,fffffd8066617900,ffff800020b60b60) at
ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1036
rip6_input(ffff800020b60db8,ffff800020b60dc4,0,18) at rip6_input+0x7e7
sys/netinet6/raw_ip6.c:225
ip_deliver(ffff800020b60db8,ffff800020b60dc4,0,18) at ip_deliver+0x353
sys/netinet/ip_input.c:665
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb ip6_ours sys/netinet6/ip6_input.c:518 [inline]
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb sys/netinet6/ip6_input.c:340
ipv6_input(ffff800000670000,fffffd8066617900) at ipv6_input+0x48
sys/netinet6/ip6_input.c:171
if_input_local(ffff800000670000,fffffd8066617900,18) at
if_input_local+0x121 sys/net/if.c:781
ip6_output(fffffd8061ac6b00,ffff800000a14400,fffffd806f66a700,0,0,fffffd806f66a690)
at
ip6_output+0xd26
rip6_output(fffffd8061ac6b00,fffffd8064c5d198,ffff800020b61120,0) at
rip6_output+0x4c0 sys/netinet6/raw_ip6.c:481
rip6_usrreq(fffffd8064c5d198,9,fffffd8061ac6b00,0,0,ffff800020ade2a0) at
rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670
sosend(fffffd8064c5d198,0,ffff800020b61368,0,0,0) at sosend+0x645
sys/kern/uipc_socket.c:524
end trace frame: 0xffff800020b61350, count: 0
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
m_copydata: null mbuf
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff822419e2) at panic+0x15c sys/kern/subr_prf.c:207
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
m_getptr sys/kern/uipc_mbuf.c:1031 [inline]
m_copydata(fffffd8066617900,6f8,8,fffffd8061dba920) at m_copydata+0x17e
sys/kern/uipc_mbuf.c:722
ip6_pullexthdr(fffffd8066617900,6f8,0) at ip6_pullexthdr+0x16f
sys/netinet6/ip6_input.c:1149
ip6_savecontrol(fffffd806f66a348,fffffd8066617900,ffff800020b60b60) at
ip6_savecontrol+0x373 sys/netinet6/ip6_input.c:1036
rip6_input(ffff800020b60db8,ffff800020b60dc4,0,18) at rip6_input+0x7e7
sys/netinet6/raw_ip6.c:225
ip_deliver(ffff800020b60db8,ffff800020b60dc4,0,18) at ip_deliver+0x353
sys/netinet/ip_input.c:665
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb ip6_ours sys/netinet6/ip6_input.c:518 [inline]
ip6_input_if(ffff800020b60db8,ffff800020b60dc4,29,0,ffff800000670000) at
ip6_input_if+0x17cb sys/netinet6/ip6_input.c:340
ipv6_input(ffff800000670000,fffffd8066617900) at ipv6_input+0x48
sys/netinet6/ip6_input.c:171
if_input_local(ffff800000670000,fffffd8066617900,18) at
if_input_local+0x121 sys/net/if.c:781
ip6_output(fffffd8061ac6b00,ffff800000a14400,fffffd806f66a700,0,0,fffffd806f66a690)
at
ip6_output+0xd26
rip6_output(fffffd8061ac6b00,fffffd8064c5d198,ffff800020b61120,0) at
rip6_output+0x4c0 sys/netinet6/raw_ip6.c:481
rip6_usrreq(fffffd8064c5d198,9,fffffd8061ac6b00,0,0,ffff800020ade2a0) at
rip6_usrreq+0x5e1 sys/netinet6/raw_ip6.c:670
sosend(fffffd8064c5d198,0,ffff800020b61368,0,0,0) at sosend+0x645
sys/kern/uipc_socket.c:524
dofilewritev(ffff800020ade2a0,5,ffff800020b61368,0,ffff800020b61450) at
dofilewritev+0x1b7 sys/kern/sys_generic.c:364
sys_write(ffff800020ade2a0,ffff800020b61408,ffff800020b61450) at
sys_write+0x83 sys/kern/sys_generic.c:284
syscall(ffff800020b614d0) at syscall+0x4a4 mi_syscall
sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b614d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x48dcb63c60, count: -18
ddb{0}> show registers
rdi 0xffffffff81cee8a7 db_enter+0x17
rsi 0x57a8 __ALIGN_SIZE+0x47a8
rbp 0xffff800020b608d0
rbx 0xffff800020b60980
rdx 0x57a9 __ALIGN_SIZE+0x47a9
rcx 0xffff800021d94000
rax 0xffff800021d94000
r8 0xffffffff81ff23ef kprintf+0x16f
r9 0x1
r10 0x25
r11 0xe9aa1b71e8ee4ed2
r12 0x3000000008
r13 0xffff800020b608e0
r14 0x100
r15 0x1
rip 0xffffffff81cee8a8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b608c0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=238273 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=77, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020ade518,0xffffffff82613fb8
process=0xffff800020aec700 user=0xffff800020b5c000,
vmspace=0xfffffd807f008170
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
35590 152309 10897 0 2 0 syz-executor.0
*35590 238273 10897 0 7 0x4000000 syz-executor.0
17261 292800 0 0 3 0x14200 bored sosplice
10897 465152 9896 0 3 0x82 nanosleep syz-executor.0
50338 205458 9896 0 2 0x2 syz-executor.1
9896 175781 22058 0 3 0x82 thrsleep syz-fuzzer
9896 449666 22058 0 3 0x4000082 nanosleep syz-fuzzer
9896 151486 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 396639 22058 0 3 0x4000082 nanosleep syz-fuzzer
9896 321692 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 158539 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 349634 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 373326 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 43382 22058 0 3 0x4000082 thrsleep syz-fuzzer
9896 145541 22058 0 7 0x4000002 syz-fuzzer
22058 175821 27953 0 3 0x10008a pause ksh
27953 254092 22759 0 3 0x92 select sshd
78491 486498 1 0 3 0x100083 ttyin getty
22759 5131 1 0 3 0x80 select sshd
7777 154836 29186 74 3 0x100092 bpf pflogd
29186 46686 1 0 3 0x80 netio pflogd
40469 269474 8586 73 3 0x100090 kqread syslogd
8586 189529 1 0 3 0x100082 netio syslogd
78528 362419 1 77 3 0x100090 poll dhclient
86262 484380 1 0 3 0x80 poll dhclient
16878 401146 0 0 2 0x14200 zerothread
27524 188221 0 0 3 0x14200 aiodoned aiodoned
95371 332937 0 0 3 0x14200 syncer update
63372 198551 0 0 3 0x14200 cleaner cleaner
72955 552 0 0 3 0x14200 reaper reaper
82594 337626 0 0 3 0x14200 pgdaemon pagedaemon
1070 402358 0 0 3 0x14200 bored crynlk
68647 113163 0 0 3 0x14200 bored crypto
16789 176641 0 0 3 0x40014200 acpi0 acpi0
13013 447808 0 0 3 0x40014200 idle1
48473 20473 0 0 3 0x14200 bored softnet
21563 51289 0 0 3 0x14200 bored systqmp
51709 394148 0 0 3 0x14200 bored systq
78999 238918 0 0 3 0x40014200 bored softclock
25285 513044 0 0 3 0x40014200 idle0
25881 433550 0 0 3 0x14200 bored smr
1 352380 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 1:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82651b08)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:822
#4 uvm_pagealloc+0x283 sys/uvm/uvm_page.c:923
#5 uvm_fault+0xfdd
#6 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#7 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#8 recall_trap+0x8
Process 35590 (syz-executor.0) thread 0xffff800020ade2a0 (238273)
exclusive rwlock netlock r = 0 (0xffffffff824a3a38)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x51b sys/kern/uipc_socket.c:512
#3 dofilewritev+0x1b7 sys/kern/sys_generic.c:364
#4 sys_write+0x83 sys/kern/sys_generic.c:284
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6 Xsyscall+0x128
Process 9896 (syz-fuzzer) thread 0xffff800020ac13d8 (145541)
shared rwlock vmmaplk r = 0 (0xfffffd806e7aa020)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
#2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524
#3 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#5 recall_trap+0x8
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8260a4c0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 pageflttrap+0x6f sys/arch/amd64/amd64/trap.c:162
#2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#3 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9531 6679K 7305K 78643K 11595 0
pcb 17 8K 8K 78643K 89 0
rtable 113 4K 4K 78643K 359 0
ifaddr 67 13K 13K 78643K 123 0
counters 39 33K 33K 78643K 39 0
ioctlops 0 0K 4K 78643K 1477 0
iov 0 0K 16K 78643K 43 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1485 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 83 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 239 0
sigio 0 0K 0K 78643K 2 0
proc 60 63K 95K 78643K 502 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 15 0
in_multi 52 3K 3K 78643K 89 0
ether_multi 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 42 185K 185K 78643K 42 0
exec 0 0K 1K 78643K 255 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 22K 23K 78643K 1811 0
UVM aobj 41 2K 2K 78643K 43 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 4 0K 0K 78643K 69 0
NDP 11 0K 0K 78643K 28 0
temp 132 3019K 3090K 78643K 7210 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg
Idle
arp 64 10 0 4 1 0 1 1 0
8 0
plcache 128 20 0 0 1 0 1 1 0
8 0
rtpcb 80 41 0 39 1 0 1 1 0
8 0
rtentry 112 70 0 25 2 0 2 2 0
8 0
unpcb 120 125 0 115 1 0 1 1 0
8 0
syncache 264 10 0 10 2 1 1 1 0
8 1
tcpqe 32 127 0 127 2 1 1 1 0
8 1
tcpcb 544 175 0 169 2 0 2 2 0
8 1
inpcb 280 410 0 398 2 0 2 2 0
8 1
nd6 48 8 0 4 1 0 1 1 0
8 0
ppxss 1128 7 0 7 1 1 0 1 0
8 0
pffrag 232 8 0 8 2 1 1 1 0
482 1
pffrnode 88 8 0 8 2 1 1 1 0
8 1
pffrent 40 233 0 233 2 1 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 46 0 4 1 0 1 1 0
8 0
pfstkey 112 46 0 4 2 0 2 2 0
8 0
pfstate 328 46 0 3 4 0 4 4 0
8 0
pfrule 1360 21 0 16 2 1 1 2 0
8 0
art_heap8 4096 2 0 0 2 0 2 2 0
8 0
art_heap4 256 326 0 100 16 1 15 15 0
8 0
art_table 32 328 0 100 2 0 2 2 0
8 0
art_node 16 69 0 28 1 0 1 1 0
8 0
sysvmsgpl 40 48 0 28 1 0 1 1 0
8 0
semupl 112 4 0 4 1 1 0 1 0
8 0
semapl 112 81 0 71 1 0 1 1 0
8 0
shmpl 112 41 0 2 2 0 2 2 0
8 0
dirhash 1024 17 0 0 3 0 3 3 0
8 0
dino1pl 128 1753 0 344 46 0 46 46 0
8 0
ffsino 272 1753 0 344 95 0 95 95 0
8 0
nchpl 144 2327 0 719 61 0 61 61 0
8 0
uvmvnodes 72 2017 0 0 37 0 37 37 0
8 0
vnodes 208 2017 0 0 107 0 107 107 0
8 0
namei 1024 6765 0 6765 1 0 1 1 0
8 1
percpumem 16 30 0 0 1 0 1 1 0
8 0
scxspl 192 6904 0 6904 8 5 3 7 0
8 3
plimitpl 152 42 0 34 1 0 1 1 0
8 0
sigapl 432 435 0 420 3 1 2 3 0
8 0
futexpl 56 5637 0 5637 1 0 1 1 0
8 1
knotepl 112 95 0 76 1 0 1 1 0
8 0
kqueuepl 104 95 0 93 1 0 1 1 0
8 0
pipepl 160 278 0 259 3 1 2 2 0
8 1
fdescpl 488 436 0 420 3 0 3 3 0
8 0
filepl 152 3165 0 3061 6 0 6 6 0
8 2
lockfpl 104 147 0 146 1 0 1 1 0
8 0
lockfspl 48 33 0 32 1 0 1 1 0
8 0
sessionpl 112 19 0 8 1 0 1 1 0
8 0
pgrppl 48 26 0 15 1 0 1 1 0
8 0
ucredpl 96 230 0 221 1 0 1 1 0
8 0
zombiepl 144 420 0 420 1 0 1 1 0
8 1
processpl 896 452 0 420 4 0 4 4 0
8 0
procpl 632 945 0 903 6 1 5 5 0
8 0
sosppl 128 4 0 4 1 0 1 1 0
8 1
sockpl 384 589 0 565 4 0 4 4 0
8 1
mcl64k 65536 7 0 0 1 0 1 1 0
8 0
mcl16k 16384 1 0 0 1 0 1 1 0
8 0
mcl12k 12288 3 0 0 1 0 1 1 0
8 0
mcl9k 9216 2 0 0 1 0 1 1 0
8 0
mcl8k 8192 5 0 0 1 0 1 1 0
8 0
mcl4k 4096 6 0 0 1 0 1 1 0
8 0
mcl2k2 2112 2 0 0 1 0 1 1 0
8 0
mcl2k 2048 166 0 0 20 0 20 20 0
8 0
mtagpl 80 18 0 0 1 0 1 1 0
8 0
mbufpl 256 294 0 0 18 0 18 18 0
8 0
bufpl 280 7100 0 1342 412 0 412 412 0
8 0
anonpl 16 60208 0 42246 82 1 81 81 0
125 1
amapchunkpl 152 2619 0 2473 12 0 12 12 0
158 5
amappl16 192 1994 0 926 55 0 55 55 0
8 1
amappl15 184 215 0 212 1 0 1 1 0
8 0
amappl14 176 42 0 38 1 0 1 1 0
8 0
amappl13 168 93 0 91 1 0 1 1 0
8 0
amappl12 160 4 0 3 1 0 1 1 0
8 0
amappl11 152 60 0 44 1 0 1 1 0
8 0
amappl10 144 14 0 10 1 0 1 1 0
8 0
amappl9 136 649 0 643 1 0 1 1 0
8 0
amappl8 128 167 0 132 2 0 2 2 0
8 0
amappl7 120 109 0 97 1 0 1 1 0
8 0
amappl6 112 64 0 54 1 0 1 1 0
8 0
amappl5 104 133 0 119 1 0 1 1 0
8 0
amappl4 96 777 0 747 1 0 1 1 0
8 0
amappl3 88 130 0 122 1 0 1 1 0
8 0
amappl2 80 2599 0 2525 3 1 2 3 0
8 0
amappl1 72 19579 0 19134 26 16 10 21 0
8 0
amappl 80 1224 0 1176 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 42 0 2 1 0 1 1 0
8 0
uaddrrnd 24 436 0 420 1 0 1 1 0
8 0
uaddrbest 32 2 0 0 1 0 1 1 0
8 0
uaddr 24 436 0 420 1 0 1 1 0
8 0
vmmpekpl 168 7493 0 7460 3 1 2 2 0
8 0
vmmpepl 168 62272 0 60013 150 9 141 141 0 357
40
vmsppl 368 435 0 420 2 0 2 2 0
8 0
pdppl 4096 879 0 840 6 0 6 6 0
8 1
pvpl 32 193157 0 172016 192 0 192 192 0
265 8
pmappl 232 435 0 420 2 1 1 2 0
8 0
extentpl 40 46 0 29 1 0 1 1 0
8 0
phpool 112 173 0 4 5 0 5 5 0
8 0
---
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.
Anton Lindqvist
Dec 9, 2019, 4:29:16 AM12/9/19
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: m_copydata: null mbuf
Anton Lindqvist
Dec 9, 2019, 4:36:22 AM12/9/19
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: panic: m_copydata: null mbuf
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