panic: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*132897 54366 0 0 0x4000000 0 syz-executor.2
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82432194) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff8249e838,ffffffff824b9306,eb,ffffffff824d59fb) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd80687c5c70) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd807d950a38) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8068778710,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8068778710,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd8079d88960,98000,4000,fffffd807f7d8900,0,ffff8000249a8ca8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff8000249a8d40) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8068778710,ffff8000249a8f68,1,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd8068652f00,ffff8000249a8f68,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414
dofilewritev(ffff800024b207e8,3,ffff8000249a8f68,1,ffff8000249a9070) at dofilewritev+0x19c sys/kern/sys_generic.c:380
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline]
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439
syscall(ffff8000249a90e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
end trace frame: 0xffff8000249a9160, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82432194) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff8249e838,ffffffff824b9306,eb,ffffffff824d59fb) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd80687c5c70) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd807d950a38) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8068778710,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8068778710,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd8079d88960,98000,4000,fffffd807f7d8900,0,ffff8000249a8ca8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff8000249a8d40) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8068778710,ffff8000249a8f68,1,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd8068652f00,ffff8000249a8f68,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414
dofilewritev(ffff800024b207e8,3,ffff8000249a8f68,1,ffff8000249a9070) at dofilewritev+0x19c sys/kern/sys_generic.c:380
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline]
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439
syscall(ffff8000249a90e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa5cf7b69330, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff8000249a85f0
rbx 0x4000001 __kernel_phys_end+0x1600001
rdx 0xffff800000b80540
rcx 0
rax 0xffff800024b207e8
r8 0x101010101010101
r9 0x8080808080808080
r10 0x5e1a2c0f89612235
r11 0xe62cce8ecc348868
r12 0
r13 0
r14 0
r15 0x1
rip 0xffffffff82156c78 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000249a85e0
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.2) pid=132897 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800024b20fc8,0xffffffff828246e8
process=0xffff800024b2cfd8 user=0xffff8000249a4000, vmspace=0xfffffd807e83bcd0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
54366 5127 54737 0 2 0 syz-executor.2
*54366 132897 54737 0 7 0x4000000 syz-executor.2
12884 348941 83231 0 2 0 syz-executor.1
12884 211279 83231 0 3 0x4000080 rest syz-executor.1
16999 158611 63477 0 2 0 syz-executor.0
16999 518433 63477 0 3 0x4000080 fsleep syz-executor.0
83231 454589 65871 0 3 0x82 nanoslp syz-executor.1
54737 338916 65871 0 3 0x82 nanoslp syz-executor.2
63477 334175 65871 0 3 0x82 nanoslp syz-executor.0
48281 182260 65871 0 2 0x2 syz-executor.3
37379 343722 0 0 3 0x14280 nfsidl nfsio
99675 372598 0 0 3 0x14280 nfsidl nfsio
38712 103893 0 0 3 0x14280 nfsidl nfsio
23836 370376 0 0 3 0x14280 nfsidl nfsio
3344 2113 0 0 3 0x14280 nfsidl nfsio
86231 2486 0 0 3 0x14280 nfsidl nfsio
23654 103304 0 0 3 0x14280 nfsidl nfsio
48702 158693 0 0 3 0x14280 nfsidl nfsio
8672 503194 0 0 3 0x14280 nfsidl nfsio
77426 348380 0 0 3 0x14280 nfsidl nfsio
12716 358294 0 0 3 0x14280 nfsidl nfsio
73463 310195 0 0 3 0x14280 nfsidl nfsio
74411 200647 0 0 3 0x14280 nfsidl nfsio
86715 483049 0 0 3 0x14280 nfsidl nfsio
64863 193817 0 0 3 0x14280 nfsidl nfsio
85191 464775 0 0 3 0x14280 nfsidl nfsio
58128 44205 0 0 3 0x14280 nfsidl nfsio
85707 29124 0 0 3 0x14280 nfsidl nfsio
26964 76373 0 0 3 0x14280 nfsidl nfsio
74940 436472 0 0 3 0x14280 nfsidl nfsio
3623 63341 1 0 3 0x100083 ttyin getty
17493 285758 0 0 3 0x14200 acct acct
68612 204864 0 0 3 0x14200 bored sosplice
65871 184187 90921 0 3 0x82 thrsleep syz-fuzzer
65871 457672 90921 0 3 0x4000082 nanoslp syz-fuzzer
65871 9364 90921 0 3 0x4000082 thrsleep syz-fuzzer
65871 473725 90921 0 3 0x4000082 thrsleep syz-fuzzer
65871 381138 90921 0 3 0x4000082 thrsleep syz-fuzzer
65871 440077 90921 0 3 0x4000082 kqread syz-fuzzer
65871 310380 90921 0 3 0x4000082 thrsleep syz-fuzzer
90921 366596 78930 0 3 0x10008a sigsusp ksh
78930 301178 2359 0 3 0x9a poll sshd
2359 168108 1 0 3 0x88 poll sshd
19921 430494 80331 73 3 0x100090 kqread syslogd
80331 498340 1 0 3 0x100082 netio syslogd
37771 86179 1 0 3 0x100080 kqread resolvd
95469 132447 65162 77 3 0x100092 kqread dhcpleased
7875 70787 65162 77 3 0x100092 kqread dhcpleased
65162 179428 1 0 3 0x80 kqread dhcpleased
64869 47969 0 0 3 0x14200 bored smr
50796 180648 0 0 2 0x14200 zerothread
13603 267145 0 0 3 0x14200 aiodoned aiodoned
9192 205946 0 0 3 0x14200 syncer update
68525 308626 0 0 3 0x14200 cleaner cleaner
47044 359035 0 0 3 0x14200 reaper reaper
96243 97393 0 0 3 0x14200 pgdaemon pagedaemon
6041 388124 0 0 3 0x14200 bored viomb
98292 13054 0 0 3 0x40014200 acpi0 acpi0
65225 36472 0 0 3 0x14200 bored softnet
37102 348947 0 0 3 0x14200 bored systqmp
32592 71819 0 0 3 0x14200 bored systq
38407 344480 0 0 3 0x40014200 bored softclock
65063 121823 0 0 3 0x40014200 idle0
1 481843 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10188 6615K 15310K 78643K 38624 0
pcb 13 18K 23K 78643K 1151 0
rtable 192 16K 20K 78643K 3960 0
ifaddr 82 22K 24K 78643K 1337 0
sysctl 3 1K 1K 78643K 5 0
counters 23 16K 17K 78643K 148 0
ioctlops 0 0K 4K 78643K 1908 0
iov 1 12K 24K 78643K 2756 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1544 97K 97K 78643K 8397 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 40 0
VM map 2 0K 0K 78643K 2 0
sem 12 0K 0K 78643K 2335 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 9 29K 45K 78643K 11295 0
sigio 0 0K 0K 78643K 95 0
proc 58 55K 71K 78643K 1761 0
subproc 52 3K 6K 78643K 665 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 343 0
in_multi 50 3K 4K 78643K 878 0
ether_multi 1 0K 0K 78643K 115 0
mrt 1 0K 0K 78643K 21 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 181 811K 811K 78643K 181 0
exec 0 0K 2K 78643K 2430 0
tdb 3 0K 0K 78643K 3 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 302 168K 199K 78643K 137121 0
UVM aobj 131 9K 9K 78643K 140 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 431 0
NDP 9 0K 1K 78643K 253 0
temp 111 4219K 4435K 78643K 202796 0
kqueue 10 14K 24K 78643K 360 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 500 0 497 7 5 2 3 0 8 1
rtentry 112 646 0 585 3 1 2 3 0 8 0
unpcb 136 6182 0 6169 70 67 3 9 0 8 2
syncache 296 20 0 20 6 6 0 1 0 8 0
tcpqe 32 64 0 64 4 4 0 1 0 8 0
tcpcb 736 2578 0 2574 115 108 7 19 0 8 6
arp 88 101 0 90 1 0 1 1 0 8 0
ipq 40 7 0 7 5 5 0 1 0 8 0
ipqe 40 185 0 185 5 5 0 1 0 8 0
inpcb 304 6761 0 6752 134 128 6 14 0 8 5
rttmr 72 7 0 7 2 2 0 1 0 8 0
ip6q 72 1 0 0 1 0 1 1 0 8 0
nd6 48 173 0 163 1 0 1 1 0 8 0
pkpcb 40 44 0 44 7 7 0 1 0 8 0
kcovpl 48 46 0 42 1 0 1 1 0 8 0
ppxss 1152 37 0 37 9 8 1 1 0 8 1
pfstscr 40 45 0 44 1 0 1 1 0 8 0
pfosfp 40 4 0 3 1 0 1 1 0 8 0
pfosfpen 112 4 0 3 1 0 1 1 0 8 0
pfrktable 1344 932 0 911 9 6 3 3 0 8 1
pftag 88 154 0 147 4 3 1 1 0 8 0
pfstitem 24 83 0 81 1 0 1 1 0 8 0
pfstkey 112 93 0 91 1 0 1 1 0 8 0
pfstate 320 48 0 47 1 0 1 1 0 8 0
pfrule 1360 629 0 547 12 5 7 7 0 8 0
art_heap8 4096 2 0 1 2 1 1 2 0 8 0
art_heap4 256 2592 0 2324 38 19 19 20 0 8 0
art_table 32 2594 0 2325 3 0 3 3 0 8 0
art_node 16 645 0 589 1 0 1 1 0 8 0
sysvmsgpl 40 79 0 59 1 0 1 1 0 8 0
semapl 112 2333 0 2323 1 0 1 1 0 8 0
shmpl 112 137 0 9 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 15662 0 14245 89 0 89 89 0 8 0
ffsino 240 15662 0 14245 84 0 84 84 0 8 0
nchpl 144 32427 0 30843 61 1 60 61 0 8 0
uvmvnodes 80 8641 0 0 177 0 177 177 0 8 0
vnodes 224 8641 0 0 509 0 509 509 0 8 0
namei 1024 114887 0 114886 1 0 1 1 0 8 0
vcpupl 1984 48 0 2 6 0 6 6 0 8 0
vmpool 528 65 0 19 4 0 4 4 0 8 0
pfiaddrpl 120 308 0 279 3 2 1 1 0 8 0
scsiplug 72 4 0 4 1 1 0 1 0 8 0
scxspl 216 91769 0 91758 16 15 1 8 0 8 0
plimitpl 152 894 0 884 1 0 1 1 0 8 0
sigapl 424 11416 0 11361 9 2 7 7 0 8 0
futexpl 64 105987 0 105986 1 0 1 1 0 8 0
knotepl 112 4695 0 4645 3 1 2 3 0 8 0
kqueuepl 184 3737 0 3728 43 39 4 7 0 8 3
pipepl 304 1818 0 1802 51 49 2 7 0 8 0
fdescpl 432 11380 0 11360 3 0 3 3 0 8 0
filepl 120 77208 0 77058 113 103 10 12 0 8 5
lockfpl 104 3972 0 3969 7 6 1 2 0 8 0
lockfspl 48 1446 0 1443 1 0 1 1 0 8 0
sessionpl 144 64 0 52 1 0 1 1 0 8 0
pgrppl 48 115 0 103 1 0 1 1 0 8 0
ucredpl 96 8732 0 8721 1 0 1 1 0 8 0
zombiepl 144 11361 0 11361 2 1 1 1 0 8 1
processpl 1000 11416 0 11361 8 0 8 8 0 8 0
procpl 672 29056 0 28992 30 23 7 8 0 8 1
sosppl 168 43 0 43 11 11 0 1 0 8 0
sockpl 448 13496 0 13473 348 335 13 30 0 8 10
mcl64k 65536 414 0 414 22 21 1 1 0 8 1
mcl16k 16384 152 0 152 27 27 0 1 0 8 0
mcl12k 12288 270 0 270 22 21 1 1 0 8 1
mcl9k 9216 182 0 182 28 27 1 1 0 8 1
mcl8k 8192 788 0 788 7 6 1 1 0 8 1
mcl4k 4096 1401 0 1401 8 7 1 1 0 8 1
mcl2k2 2112 91 0 91 28 28 0 1 0 8 0
mcl2k 2048 97450 0 97392 23 14 9 13 0 8 0
mtagpl 96 4077 0 3877 41 35 6 18 0 8 1
mbufpl 256 222680 0 222019 242 192 50 108 0 8 4
bufpl 288 24506 0 18088 459 0 459 459 0 8 0
anonpl 24 3153547 0 3135479 304 165 139 145 0 188 13
amapchunkpl 152 360477 0 359840 122 94 28 40 0 158 1
amappl16 200 32683 0 31963 155 109 46 51 0 8 6
amappl15 192 195 0 193 1 0 1 1 0 8 0
amappl14 184 359 0 355 1 0 1 1 0 8 0
amappl13 176 2128 0 2127 1 0 1 1 0 8 0
amappl12 168 1920 0 1915 1 0 1 1 0 8 0
amappl11 160 1376 0 1364 1 0 1 1 0 8 0
amappl10 152 1849 0 1843 1 0 1 1 0 8 0
amappl9 144 2290 0 2286 1 0 1 1 0 8 0
amappl8 136 2734 0 2665 3 0 3 3 0 8 0
amappl7 128 1849 0 1840 1 0 1 1 0 8 0
amappl6 120 2226 0 2206 1 0 1 1 0 8 0
amappl5 112 9345 0 9328 1 0 1 1 0 8 0
amappl4 104 4189 0 4161 1 0 1 1 0 8 0
amappl3 96 3452 0 3433 1 0 1 1 0 8 0
amappl2 88 4645 0 4600 2 0 2 2 0 8 0
amappl1 80 201638 0 201176 19 8 11 12 0 8 0
amappl 88 135948 0 135756 5 0 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 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 72 139 0 9 3 0 3 3 0 8 0
uaddrrnd 24 11445 0 11379 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 11445 0 11379 1 0 1 1 0 8 0
vmmpekpl 168 76003 0 75957 3 0 3 3 0 8 0
vmmpepl 168 1041574 0 1039283 411 283 128 132 0 357 20
vmsppl 272 11444 0 11379 6 1 5 5 0 8 0
rwobjpl 24 249572 0 239263 75 12 63 63 0 8 0
pdppl 4096 22896 0 22804 171 77 94 100 0 8 2
pvpl 32 5177436 0 5157167 503 294 209 216 0 265 31
pmappl 216 11444 0 11379 4 0 4 4 0 8 0
extentpl 40 57 0 38 1 0 1 1 0 8 0
phpool 112 1660 0 815 26 0 26 26 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82432194) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff8249e838,ffffffff824b9306,eb,ffffffff824d59fb) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd80687c5c70) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd807d950a38) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8068778710,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8068778710,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd8079d88960,98000,4000,fffffd807f7d8900,0,ffff8000249a8ca8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff8000249a8d40) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8068778710,ffff8000249a8f68,1,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd8068652f00,ffff8000249a8f68,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414
dofilewritev(ffff800024b207e8,3,ffff8000249a8f68,1,ffff8000249a9070) at dofilewritev+0x19c sys/kern/sys_generic.c:380
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline]
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439
syscall(ffff8000249a90e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa5cf7b69330, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82432194) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff8249e838,ffffffff824b9306,eb,ffffffff824d59fb) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd80687c5c70) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd807d950a38) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8068778710,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8068778710,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd8079d88960,98000,4000,fffffd807f7d8900,0,ffff8000249a8ca8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff8000249a8d40) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8068778710,ffff8000249a8f68,1,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd8068652f00,ffff8000249a8f68,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414
dofilewritev(ffff800024b207e8,3,ffff8000249a8f68,1,ffff8000249a9070) at dofilewritev+0x19c sys/kern/sys_generic.c:380
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline]
sys_pad_pwritev(ffff800024b207e8,ffff8000249a9018,ffff8000249a9070) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439
syscall(ffff8000249a90e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa5cf7b69330, count: -15