panic: kernel diagnostic assertion "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/main/kernel/sys/kern/uipc_mbuf.c", line 1384 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *376787 9597 0 0 0x4000000 0 syz-executor.4 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8254a5ed) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825bc195,ffffffff825d144c,568,ffffffff825624d9) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd806819ed00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e8550d8,ffff800000c2e800,ffff80002e854db8,ffff80002e854cb8) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002e8550d8,1) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002e854eb0) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8068d9b820,ffff80002e8550d8,1,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd80687fabd0,ffff80002e8550d8,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002168a7e8,3,ffff80002e8550d8,1,ffff80002e8551e0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002e855250) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa15d98f5a20, count: 2 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 "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/main/kernel/sys/kern/uipc_mbuf.c", line 1384 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8254a5ed) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825bc195,ffffffff825d144c,568,ffffffff825624d9) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd806819ed00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e8550d8,ffff800000c2e800,ffff80002e854db8,ffff80002e854cb8) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002e8550d8,1) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002e854eb0) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8068d9b820,ffff80002e8550d8,1,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd80687fabd0,ffff80002e8550d8,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002168a7e8,3,ffff80002e8550d8,1,ffff80002e8551e0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002e855250) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa15d98f5a20, count: -13 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002e854ae0 rbx 0 rdx 0 rcx 0 rax 0xffff80002168a7e8 r8 0 r9 0x8080808080808080 r10 0xfa8e0825cb362ba9 r11 0x48f04cf6fd222859 r12 0 r13 0xffffffbe r14 0 r15 0x1 rip 0xffffffff824a53a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e854ad0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.4) pid=376787 stat=onproc flags process=0 proc=4000000 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002168b268,0xffff80002168a018 process=0xffff8000240d0bf8 user=0xffff80002e850000, vmspace=0xfffffd806c4f8de0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 92466 298952 38390 0 2 0 syz-executor.0 92466 89193 38390 0 3 0x4000080 fsleep syz-executor.0 9597 296238 63957 0 2 0 syz-executor.4 9597 307995 63957 0 3 0x4000080 fsleep syz-executor.4 9597 210887 63957 0 3 0x4000080 fsleep syz-executor.4 * 9597 376787 63957 0 7 0x4000000 syz-executor.4 9597 486205 63957 0 2 0x4000000 syz-executor.4 9597 104454 63957 0 2 0x4000000 syz-executor.4 9597 206151 63957 0 2 0x4000000 syz-executor.4 9597 103954 63957 0 2 0x4000000 syz-executor.4 9597 260564 63957 0 2 0x4000000 syz-executor.4 9597 368363 63957 0 2 0x4000000 syz-executor.4 9597 221261 63957 0 2 0x4000000 syz-executor.4 9597 215215 63957 0 2 0x4000000 syz-executor.4 9597 85746 63957 0 2 0x4000000 syz-executor.4 9597 129200 63957 0 2 0x4000000 syz-executor.4 9597 257598 63957 0 2 0x4000000 syz-executor.4 32930 401551 51272 0 2 0 syz-executor.3 32930 193660 51272 0 3 0x4000080 fsleep syz-executor.3 32930 161035 51272 0 3 0x4000080 fsleep syz-executor.3 43159 131647 19961 0 2 0 syz-executor.6 43159 324546 19961 0 3 0x4000080 fsleep syz-executor.6 91352 426646 76562 0 2 0 syz-executor.7 91352 243269 76562 0 3 0x4000080 fsleep syz-executor.7 98711 162082 8209 0 3 0x82 nanoslp syz-executor.1 6941 318061 0 0 3 0x14280 nfsidl nfsio 79462 156285 0 0 3 0x14280 nfsidl nfsio 96475 48591 0 0 3 0x14280 nfsidl nfsio 79275 410589 0 0 3 0x14280 nfsidl nfsio 85962 404477 0 0 3 0x14280 nfsidl nfsio 43887 487128 0 0 3 0x14280 nfsidl nfsio 21248 9298 0 0 3 0x14280 nfsidl nfsio 88771 468234 0 0 3 0x14280 nfsidl nfsio 48321 199226 0 0 3 0x14280 nfsidl nfsio 53105 341466 0 0 3 0x14280 nfsidl nfsio 36389 353856 0 0 3 0x14280 nfsidl nfsio 64983 438202 0 0 3 0x14280 nfsidl nfsio 30199 224644 0 0 3 0x14280 nfsidl nfsio 58508 14270 0 0 3 0x14280 nfsidl nfsio 92302 225145 0 0 3 0x14280 nfsidl nfsio 2573 178681 0 0 3 0x14280 nfsidl nfsio 11669 173451 0 0 3 0x14280 nfsidl nfsio 11079 172107 0 0 3 0x14280 nfsidl nfsio 71436 279327 0 0 3 0x14280 nfsidl nfsio 26232 356025 0 0 3 0x14280 nfsidl nfsio 51272 8982 8209 0 3 0x82 nanoslp syz-executor.3 9431 332207 8209 0 3 0x82 nanoslp syz-executor.2 97102 29151 0 0 3 0x14200 bored sosplice 63957 300877 8209 0 3 0x82 nanoslp syz-executor.4 76562 23993 8209 0 2 0x482 syz-executor.7 19961 123671 8209 0 2 0x482 syz-executor.6 55227 285288 8209 0 3 0x82 nanoslp syz-executor.5 38390 38117 8209 0 2 0x482 syz-executor.0 8209 501487 98377 0 3 0x82 thrsleep syz-fuzzer 8209 244856 98377 0 3 0x4000082 thrsleep syz-fuzzer 8209 95445 98377 0 3 0x4000082 thrsleep syz-fuzzer 8209 110916 98377 0 3 0x4000082 thrsleep syz-fuzzer 8209 301884 98377 0 3 0x4000082 thrsleep syz-fuzzer 8209 233409 98377 0 3 0x4000082 kqread syz-fuzzer 8209 188715 98377 0 3 0x4000082 thrsleep syz-fuzzer 8209 174841 98377 0 3 0x4000082 thrsleep syz-fuzzer 98377 52230 29380 0 3 0x10008a sigsusp ksh 29380 47075 20048 0 3 0x9a kqread sshd 89448 136105 1 0 3 0x100083 ttyin getty 20048 269709 1 0 3 0x88 kqread sshd 85324 340151 19598 73 3 0x100090 kqread syslogd 19598 495019 1 0 3 0x100082 netio syslogd 66282 28602 1 0 3 0x100080 kqread resolvd 98928 42814 58037 77 3 0x100092 kqread dhcpleased 17755 505425 58037 77 3 0x100092 kqread dhcpleased 58037 407226 1 0 3 0x80 kqread dhcpleased 85025 488751 0 0 3 0x14200 bored smr 1429 314097 0 0 2 0x14200 zerothread 40965 477266 0 0 3 0x14200 aiodoned aiodoned 22905 284722 0 0 3 0x14200 syncer update 17127 239875 0 0 3 0x14200 cleaner cleaner 84818 220679 0 0 3 0x14200 reaper reaper 75722 187798 0 0 3 0x14200 pgdaemon pagedaemon 99977 279140 0 0 3 0x14200 bored viomb 34715 515821 0 0 3 0x40014200 acpi0 acpi0 59522 438146 0 0 3 0x14200 bored softnet 81216 384832 0 0 3 0x14200 bored systqmp 18810 353731 0 0 3 0x14200 bored systq 31119 76816 0 0 3 0x40014200 bored softclock 54840 313219 0 0 3 0x40014200 idle0 1 443391 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 10191 6677K 7449K 78643K 20718 0 pcb 13 14K 15K 78643K 238 0 rtable 217 8K 10K 78643K 2019 0 ifaddr 81 17K 18K 78643K 851 0 counters 26 17K 17K 78643K 44 0 ioctlops 0 0K 4K 78643K 1376 0 iov 1 12K 16K 78643K 225 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1436 90K 90K 78643K 3738 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 1632 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 97K 78643K 3221 0 sigio 2 0K 0K 78643K 12 0 proc 58 55K 87K 78643K 716 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 52 0 in_multi 81 5K 6K 78643K 242 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 920 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 324 183K 720K 78643K 39824 0 UVM aobj 106 3K 3K 78643K 106 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 1 0K 0K 78643K 62 0 NDP 11 0K 2K 78643K 69 0 temp 125 4693K 4819K 78643K 35201 0 kqueue 12 18K 24K 78643K 155 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 120 166 0 163 3 2 1 3 0 8 0 rtentry 112 202 0 108 5 1 4 4 0 8 0 unpcb 136 1679 0 1666 20 15 5 6 0 8 4 syncache 296 31 0 31 6 5 1 1 0 8 1 tcpqe 32 7 0 7 3 2 1 1 0 8 1 tcpcb 736 1696 0 1687 53 49 4 18 0 8 3 arp 88 29 0 14 1 0 1 1 0 8 0 inpcb 304 2768 0 2756 44 38 6 12 0 8 5 rttmr 72 3 0 3 1 1 0 1 0 8 0 ip6q 72 4 0 3 2 1 1 1 0 8 0 ip6af 40 7 0 6 2 1 1 1 0 8 0 nd6 48 59 0 38 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1152 7 0 7 1 1 0 1 0 8 0 pfstscr 40 9 0 6 1 0 1 1 0 8 0 pfosfp 40 35 0 34 1 0 1 1 0 8 0 pfosfpen 112 35 0 0 1 0 1 1 0 8 0 pfrktable 1344 653 0 651 4 3 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 5 0 0 1 0 1 1 0 8 0 pfstkey 112 15 0 11 1 0 1 1 0 8 0 pfstate 320 9 0 6 1 0 1 1 0 8 0 pfrule 1360 248 0 244 5 4 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 838 0 433 35 6 29 29 0 8 2 art_table 32 839 0 433 4 0 4 4 0 8 0 art_node 16 201 0 117 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 1626 0 1616 1 0 1 1 0 8 0 shmpl 112 103 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5449 0 4005 91 0 91 91 0 8 0 ffsino 240 5449 0 4005 86 0 86 86 0 8 0 nchpl 144 9782 0 8157 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 34822 0 34822 2 1 1 2 0 8 1 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 528 10 0 3 2 1 1 1 0 8 0 pfiaddrpl 120 168 0 164 4 3 1 1 0 8 0 scxspl 216 28151 0 28151 13 12 1 8 0 8 1 plimitpl 152 252 0 238 1 0 1 1 0 8 0 sigapl 424 3513 0 3453 8 0 8 8 0 8 0 futexpl 64 37667 0 37660 1 0 1 1 0 8 0 knotepl 120 34122 0 34042 4 0 4 4 0 8 0 kqueuepl 184 438 0 430 4 3 1 4 0 8 0 pipepl 304 579 0 551 16 13 3 8 0 8 0 fdescpl 432 3479 0 3453 5 1 4 5 0 8 0 filepl 120 21699 0 21456 33 21 12 17 0 8 1 lockfpl 104 2975 0 2969 10 9 1 4 0 8 0 lockfspl 48 1322 0 1316 2 1 1 2 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 28 0 12 1 0 1 1 0 8 0 ucredpl 96 1720 0 1709 1 0 1 1 0 8 0 zombiepl 144 3453 0 3450 1 0 1 1 0 8 0 processpl 1000 3513 0 3450 9 1 8 8 0 8 0 procpl 672 7685 0 7596 11 3 8 8 0 8 0 sosppl 168 32 0 32 3 3 0 1 0 8 0 sockpl 448 4622 0 4597 112 101 11 25 0 8 8 mcl64k 65536 139 0 139 5 4 1 1 0 8 1 mcl16k 16384 30 0 30 4 3 1 1 0 8 1 mcl12k 12288 86 0 86 3 2 1 1 0 8 1 mcl9k 9216 35 0 35 6 5 1 1 0 8 1 mcl8k 8192 186 0 186 2 1 1 1 0 8 1 mcl4k 4096 248 0 248 2 1 1 1 0 8 1 mcl2k2 2112 30 0 30 5 4 1 1 0 8 1 mcl2k 2048 78920 0 78848 15 5 10 11 0 8 0 mtagpl 96 1634 0 782 30 3 27 27 0 8 0 mbufpl 256 145726 0 144585 102 9 93 93 0 8 7 bufpl 288 8507 0 2098 458 0 458 458 0 8 0 anonpl 24 893719 0 875223 144 25 119 129 0 188 0 amapchunkpl 152 153210 0 152460 898 741 157 658 0 158 125 amappl16 200 8668 0 8017 60 25 35 47 0 8 0 amappl15 192 526 0 518 1 0 1 1 0 8 0 amappl14 184 13 0 8 1 0 1 1 0 8 0 amappl13 176 466 0 464 1 0 1 1 0 8 0 amappl12 168 1060 0 1053 1 0 1 1 0 8 0 amappl11 160 581 0 568 1 0 1 1 0 8 0 amappl10 152 756 0 752 1 0 1 1 0 8 0 amappl9 144 465 0 459 1 0 1 1 0 8 0 amappl8 136 684 0 624 3 0 3 3 0 8 0 amappl7 128 130 0 121 1 0 1 1 0 8 0 amappl6 120 204 0 183 2 1 1 2 0 8 0 amappl5 112 3158 0 3145 1 0 1 1 0 8 0 amappl4 104 1987 0 1956 2 0 2 2 0 8 0 amappl3 96 1360 0 1346 1 0 1 1 0 8 0 amappl2 88 1463 0 1416 3 1 2 3 0 8 0 amappl1 80 62874 0 62329 18 5 13 18 0 8 0 amappl 88 39246 0 39017 6 0 6 6 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 72 105 0 0 2 0 2 2 0 8 0 uaddrrnd 24 3489 0 3456 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3489 0 3456 1 0 1 1 0 8 0 vmmpekpl 168 24958 0 24905 3 0 3 3 0 8 0 vmmpepl 168 310497 0 308019 159 41 118 131 0 357 0 vmsppl 272 3488 0 3456 4 1 3 3 0 8 0 rwobjpl 24 78275 0 70663 47 0 47 47 0 8 0 pdppl 4096 6984 0 6919 227 156 71 80 0 8 6 pvpl 32 1578993 0 1556161 290 94 196 257 0 265 4 pmappl 216 3488 0 3456 3 1 2 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1210 0 343 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(ffffffff8254a5ed) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825bc195,ffffffff825d144c,568,ffffffff825624d9) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd806819ed00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e8550d8,ffff800000c2e800,ffff80002e854db8,ffff80002e854cb8) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002e8550d8,1) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002e854eb0) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8068d9b820,ffff80002e8550d8,1,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd80687fabd0,ffff80002e8550d8,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002168a7e8,3,ffff80002e8550d8,1,ffff80002e8551e0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002e855250) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa15d98f5a20, count: -13 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8254a5ed) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825bc195,ffffffff825d144c,568,ffffffff825624d9) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd806819ed00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e8550d8,ffff800000c2e800,ffff80002e854db8,ffff80002e854cb8) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002e8550d8,1) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002e854eb0) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8068d9b820,ffff80002e8550d8,1,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd80687fabd0,ffff80002e8550d8,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff80002168a7e8,3,ffff80002e8550d8,1,ffff80002e8551e0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff80002168a7e8,ffff80002e855188,ffff80002e8551e0) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002e855250) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa15d98f5a20, count: -13