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+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 23735 5470 0 0x8000000 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff829300a1) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e4dec,ffffffff828f079e,eb,ffffffff8286ff11) at __assert+0x29 sys/kern/subr_prf.c:157 buf_unmap(fffffd8064e959d8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8061643368) at buf_map+0x1c6 sys/kern/vfs_biomem.c:117 buf_get(fffffd806b553058,31,4000) at buf_get+0x42f sys/kern/vfs_bio.c:1175 getblk(fffffd806b553058,31,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1044 ffs2_balloc(fffffd80774992d0,c4000,4000,fffffd807f7d7958,0,ffff80002db192d8) at ffs2_balloc+0x11d9 sys/ufs/ffs/ffs_balloc.c:684 ffs_write(ffff80002db19360) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b553058,ffff80002db19580,1,fffffd807f7d7958) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd806c248f10,ffff80002db19580,1) at vn_write+0x19f sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62d200,6,ffff80002db19580,1,ffff80002db19640) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_pwritev(ffff80002a62d200,ffff80002db196f0,ffff80002db19640) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3387 syscall(ffff80002db196f0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002db19770, 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+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff829300a1) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e4dec,ffffffff828f079e,eb,ffffffff8286ff11) at __assert+0x29 sys/kern/subr_prf.c:157 buf_unmap(fffffd8064e959d8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8061643368) at buf_map+0x1c6 sys/kern/vfs_biomem.c:117 buf_get(fffffd806b553058,31,4000) at buf_get+0x42f sys/kern/vfs_bio.c:1175 getblk(fffffd806b553058,31,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1044 ffs2_balloc(fffffd80774992d0,c4000,4000,fffffd807f7d7958,0,ffff80002db192d8) at ffs2_balloc+0x11d9 sys/ufs/ffs/ffs_balloc.c:684 ffs_write(ffff80002db19360) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b553058,ffff80002db19580,1,fffffd807f7d7958) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd806c248f10,ffff80002db19580,1) at vn_write+0x19f sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62d200,6,ffff80002db19580,1,ffff80002db19640) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_pwritev(ffff80002a62d200,ffff80002db196f0,ffff80002db19640) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3387 syscall(ffff80002db196f0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4a2973606f0, count: -15 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002db18c60 rbx 0xfffffd8061643301 rdx 0xffff800000e1eb40 rcx 0 rax 0xffff80002a62d200 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2327feddc4d6b041 r11 0xfd4508be8a618328 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff813d6ecc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002db18c50 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) tid=23735 pid=5470 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a6a1c70,0xffff80002a62d9c0 process=0xffff8000329a61d8 user=0xffff80002db14000, vmspace=0xfffffd8068e2b588 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 82534 92473 77996 0 2 0x8000000 syz-executor.2 82534 386441 77996 0 3 0xc000080 fsleep syz-executor.2 84992 170448 30983 0 2 0x8000000 syz-executor.4 84992 171305 30983 0 2 0xc000000 syz-executor.4 5470 243948 71279 0 2 0x8000000 syz-executor.0 * 5470 23735 71279 0 7 0xc000000 syz-executor.0 26060 112634 82623 0 2 0x8000000 syz-executor.3 26060 80649 82623 0 3 0xc000080 fsleep syz-executor.3 17057 303330 86409 0 3 0x8000080 nanoslp syz-executor.5 17057 415966 86409 0 3 0xc000080 kqsel syz-executor.5 17057 521192 86409 0 3 0xc000080 fsleep syz-executor.5 77996 164145 10650 0 3 0x8000082 nanoslp syz-executor.2 27462 13940 10650 0 3 0x8000082 nanoslp syz-executor.6 30983 118605 10650 0 3 0x8000082 nanoslp syz-executor.4 82623 231098 10650 0 3 0x8000082 nanoslp syz-executor.3 71279 114243 10650 0 3 0x8000082 nanoslp syz-executor.0 9264 394977 10650 0 3 0x8000082 nanoslp syz-executor.7 86409 225961 10650 0 3 0x8000082 nanoslp syz-executor.5 54552 178049 64832 0 3 0x18100082 netio arp 64832 79156 1 0 3 0x810008a sigsusp sh 28004 475344 1 0 3 0x18100083 ttyin getty 8313 396863 0 0 3 0x14280 nfsidl nfsio 10879 23445 0 0 3 0x14280 nfsidl nfsio 63429 340238 0 0 3 0x14280 nfsidl nfsio 9058 509357 0 0 3 0x14280 nfsidl nfsio 87710 404599 0 0 3 0x14280 nfsidl nfsio 35766 199234 0 0 3 0x14280 nfsidl nfsio 61065 436681 0 0 3 0x14280 nfsidl nfsio 27444 339744 0 0 3 0x14280 nfsidl nfsio 25 321074 0 0 3 0x14280 nfsidl nfsio 96428 188538 0 0 3 0x14280 nfsidl nfsio 66696 340868 0 0 3 0x14280 nfsidl nfsio 83302 259869 0 0 3 0x14280 nfsidl nfsio 31646 452672 0 0 3 0x14280 nfsidl nfsio 2395 91608 0 0 3 0x14280 nfsidl nfsio 37417 407905 0 0 3 0x14280 nfsidl nfsio 55543 184115 0 0 3 0x14280 nfsidl nfsio 39128 251038 0 0 3 0x14280 nfsidl nfsio 3166 446872 0 0 3 0x14280 nfsidl nfsio 38594 36010 0 0 3 0x14280 nfsidl nfsio 25371 367570 0 0 3 0x14280 nfsidl nfsio 89094 321325 0 0 3 0x14200 bored sosplice 10650 18089 13923 0 3 0x1a000082 kqread syz-fuzzer 10650 444257 13923 0 3 0x1e000082 thrsleep syz-fuzzer 10650 252416 13923 0 3 0x1e000082 thrsleep syz-fuzzer 10650 283382 13923 0 3 0x1e000082 wait syz-fuzzer 10650 140624 13923 0 3 0x1e000082 wait syz-fuzzer 10650 489912 13923 0 3 0x1e000082 wait syz-fuzzer 10650 451180 13923 0 3 0x1e000082 thrsleep syz-fuzzer 10650 92820 13923 0 3 0x1e000082 thrsleep syz-fuzzer 10650 470981 13923 0 3 0x1e000082 wait syz-fuzzer 10650 415923 13923 0 3 0x1e000082 wait syz-fuzzer 10650 145357 13923 0 3 0x1e000082 thrsleep syz-fuzzer 10650 198842 13923 0 3 0x1e000082 wait syz-fuzzer 10650 65237 13923 0 3 0x1e000082 wait syz-fuzzer 10650 512048 13923 0 3 0x1e000082 thrsleep syz-fuzzer 10650 444728 13923 0 3 0x1e000082 thrsleep syz-fuzzer 13923 423912 55524 0 3 0x810008a sigsusp ksh 55524 265022 87760 0 3 0x1800009a kqread sshd 87760 148629 1 0 3 0x18000088 kqread sshd 19648 249606 80152 73 2 0x19100010 syslogd 80152 398916 1 0 3 0x18100082 sbwait syslogd 3150 465897 1 0 3 0x18100080 kqread resolvd 60944 65153 0 0 3 0x14200 bored smr 69501 275691 0 0 2 0x14200 zerothread 31484 392724 0 0 3 0x14200 aiodoned aiodoned 3865 431997 0 0 3 0x14200 syncer update 87787 224962 0 0 3 0x14200 cleaner cleaner 55969 30001 0 0 3 0x14200 reaper reaper 13580 241090 0 0 3 0x14200 pgdaemon pagedaemon 91637 278798 0 0 3 0x14200 bored viomb 65348 154351 0 0 3 0x40014200 acpi0 acpi0 65463 201912 0 0 3 0x14200 bored softnet3 99203 221288 0 0 3 0x14200 bored softnet2 44691 506538 0 0 3 0x14200 bored softnet1 88053 2437 0 0 3 0x14200 bored softnet0 4637 136350 0 0 3 0x14200 bored systqmp 10174 450766 0 0 3 0x14200 bored systq 28743 452586 0 0 3 0x40014200 tmoslp softclock 76586 141276 0 0 3 0x40014200 idle0 1 323312 0 0 3 0x8080082 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 10194 6444K 10779K 166960K 18348 0 pcb 17 15K 17K 166960K 1066 0 rtable 214 10K 10K 166960K 5602 0 pf 43 11K 11K 166960K 618 0 ifaddr 47 14K 17K 166960K 812 0 ifgroup 76 2K 3K 166960K 999 0 sysctl 4 1K 2K 166960K 18 0 counters 37 18K 18K 166960K 311 0 ioctlops 0 0K 2K 166960K 592 0 iov 0 0K 20K 166960K 611 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1563 98K 99K 166960K 7764 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 191 0 VM map 2 1K 1K 166960K 2 0 sem 16 5K 5K 166960K 38 0 dirhash 12 2K 3K 166960K 117 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 101K 166960K 7718 0 sigio 0 0K 0K 166960K 122 0 proc 52 42K 116K 166960K 5183 0 subproc 104 6K 7K 166960K 2158 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 893 0 in_multi 86 6K 7K 166960K 1987 0 ether_multi 1 0K 0K 166960K 69 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 3164 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 302 152K 183K 166960K 62825 0 UVM aobj 131 8K 8K 166960K 134 0 pinsyscall 32 64K 100K 166960K 13030 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 357 0 NDP 22 0K 2K 166960K 615 0 temp 99 6800K 14736K 166960K 348317 0 kqueue 6 10K 30K 166960K 870 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1016 0 1012 3 0 3 3 0 8 2 rtentry 112 1991 0 1902 4 0 4 4 0 8 1 unpcb 144 5403 0 5397 6 0 6 6 0 8 5 syncache 336 36 0 36 1 0 1 1 0 8 1 tcpqe 32 11 0 11 1 0 1 1 0 8 1 tcpcb 808 2422 0 2417 8 0 8 8 0 8 7 arp 88 370 0 353 1 0 1 1 0 8 0 ipq 40 107 0 107 1 0 1 1 0 8 1 ipqe 40 4005 0 4005 1 0 1 1 0 8 1 inpcb 352 7727 0 7720 10 1 9 10 0 8 8 nd6 104 525 0 504 1 0 1 1 0 8 0 pkpcb 40 59 0 59 1 0 1 1 0 8 1 kcovpl 48 166 0 158 1 0 1 1 0 8 0 ppxss 1072 103 0 102 1 0 1 1 0 8 0 art_heap8 4096 3 0 2 3 0 3 3 0 8 2 art_heap4 256 7821 0 7442 88 64 24 29 0 8 0 art_table 32 7824 0 7444 4 0 4 4 0 8 0 art_node 16 1959 0 1879 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 18 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 31 0 17 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 87 0 70 3 0 3 3 0 8 0 dino2pl 256 12780 0 11215 99 0 99 99 0 8 0 ffsino 240 12780 0 11215 93 0 93 93 0 8 0 nchpl 144 22786 0 22175 66 33 33 66 0 8 8 uvmvnodes 80 10509 0 0 215 0 215 215 0 8 0 vnodes 216 10509 0 0 584 0 584 584 0 8 0 namei 1024 93061 0 93061 3 0 3 3 0 8 3 vcpupl 3904 44 0 3 6 0 6 6 0 8 0 vmpool 664 59 0 18 4 0 4 4 0 8 0 kstatmem 264 584 0 548 3 0 3 3 0 8 0 scsiplug 72 10 0 10 1 0 1 1 0 8 1 scxspl 216 123115 0 123099 8 0 8 8 1 8 7 plimitpl 152 1203 0 1189 1 0 1 1 0 8 0 sigapl 424 7735 0 7672 9 0 9 9 0 8 0 futexpl 64 117347 0 117344 1 0 1 1 0 8 0 knotepl 120 25337 0 25269 17 6 11 17 0 8 8 kqueuepl 184 1849 0 1843 4 0 4 4 0 8 3 pipepl 288 1633 0 1605 7 0 7 7 0 8 4 fdescpl 432 7693 0 7668 5 0 5 5 0 8 1 filepl 120 52628 0 52401 16 1 15 16 0 8 8 lockfpl 104 2138 0 2136 2 0 2 2 0 8 1 lockfspl 48 891 0 889 1 0 1 1 0 8 0 sessionpl 144 184 0 169 1 0 1 1 0 8 0 pgrppl 48 278 0 263 1 0 1 1 0 8 0 ucredpl 104 7692 0 7683 1 0 1 1 0 8 0 zombiepl 144 7674 0 7672 1 0 1 1 0 8 0 processpl 1080 7735 0 7672 5 0 5 5 0 8 0 procpl 656 14805 0 14722 9 0 9 9 0 8 0 sosppl 168 28 0 28 1 0 1 1 0 8 1 sockpl 504 14244 0 14227 76 66 10 20 0 8 7 mcl64k 65536 455 0 455 1 0 1 1 0 8 1 mcl16k 16384 81 0 81 1 0 1 1 0 8 1 mcl12k 12288 43 0 43 1 0 1 1 0 8 1 mcl9k 9216 16 0 16 1 0 1 1 0 8 1 mcl8k 8192 270 0 270 1 0 1 1 0 8 1 mcl4k 4096 41 0 41 1 0 1 1 0 8 1 mcl2k2 2112 5 0 5 1 0 1 1 0 8 1 mcl2k 2048 41794 0 41693 39 19 20 38 0 8 7 mtagpl 96 116 0 116 1 0 1 1 0 8 1 mbufpl 256 133358 0 133148 167 146 21 61 0 8 5 bufpl 280 22783 0 11884 779 0 779 779 0 8 0 bufpl: pool(0xffffffff82d56238:bufpl): page inconsistency: page 0x0; at page head addr 0xfffffd8064e95f90 (p 0xfffffd8064e95000) anonpl 24 1026970 0 1020988 72 0 72 72 0 188 7 amapchunkpl 152 200207 0 199565 48 0 48 48 0 158 17 amappl16 200 25504 0 25348 75 54 21 23 0 8 8 amappl15 192 33 0 32 1 0 1 1 0 8 0 amappl14 184 638 0 627 2 0 2 2 0 8 1 amappl13 176 18 0 18 1 0 1 1 0 8 1 amappl12 168 10633 0 10607 2 0 2 2 0 8 0 amappl11 160 51 0 46 1 0 1 1 0 8 0 amappl10 152 242 0 232 1 0 1 1 0 8 0 amappl9 144 155 0 154 1 0 1 1 0 8 0 amappl8 136 631 0 599 2 0 2 2 0 8 0 amappl7 128 71 0 56 1 0 1 1 0 8 0 amappl6 120 2333 0 2320 2 0 2 2 0 8 1 amappl5 112 786 0 777 1 0 1 1 0 8 0 amappl4 104 1629 0 1599 2 0 2 2 0 8 1 amappl3 96 37216 0 37140 3 0 3 3 0 8 0 amappl2 88 8731 0 8673 3 0 3 3 0 8 1 amappl1 80 42563 0 42138 22 4 18 22 0 8 7 amappl 88 60718 0 60531 6 0 6 6 0 92 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 7752 0 7686 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7752 0 7686 1 0 1 1 0 8 0 vmmpekpl 168 58495 0 58415 4 0 4 4 0 8 0 vmmpepl 168 517902 0 516215 112 0 112 112 0 357 29 vmsppl 344 7751 0 7686 7 0 7 7 0 8 0 rwobjpl 24 133084 0 121454 71 0 71 71 0 8 0 pdppl 4096 15510 0 15413 548 441 107 117 0 8 10 pvpl 32 2915370 0 2903532 366 22 344 366 0 265 208 pmappl 216 7751 0 7686 5 0 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1142 0 736 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff829300a1) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e4dec,ffffffff828f079e,eb,ffffffff8286ff11) at __assert+0x29 sys/kern/subr_prf.c:157 buf_unmap(fffffd8064e959d8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8061643368) at buf_map+0x1c6 sys/kern/vfs_biomem.c:117 buf_get(fffffd806b553058,31,4000) at buf_get+0x42f sys/kern/vfs_bio.c:1175 getblk(fffffd806b553058,31,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1044 ffs2_balloc(fffffd80774992d0,c4000,4000,fffffd807f7d7958,0,ffff80002db192d8) at ffs2_balloc+0x11d9 sys/ufs/ffs/ffs_balloc.c:684 ffs_write(ffff80002db19360) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b553058,ffff80002db19580,1,fffffd807f7d7958) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd806c248f10,ffff80002db19580,1) at vn_write+0x19f sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62d200,6,ffff80002db19580,1,ffff80002db19640) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_pwritev(ffff80002a62d200,ffff80002db196f0,ffff80002db19640) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3387 syscall(ffff80002db196f0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4a2973606f0, count: -15 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff829300a1) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e4dec,ffffffff828f079e,eb,ffffffff8286ff11) at __assert+0x29 sys/kern/subr_prf.c:157 buf_unmap(fffffd8064e959d8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8061643368) at buf_map+0x1c6 sys/kern/vfs_biomem.c:117 buf_get(fffffd806b553058,31,4000) at buf_get+0x42f sys/kern/vfs_bio.c:1175 getblk(fffffd806b553058,31,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1044 ffs2_balloc(fffffd80774992d0,c4000,4000,fffffd807f7d7958,0,ffff80002db192d8) at ffs2_balloc+0x11d9 sys/ufs/ffs/ffs_balloc.c:684 ffs_write(ffff80002db19360) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b553058,ffff80002db19580,1,fffffd807f7d7958) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd806c248f10,ffff80002db19580,1) at vn_write+0x19f sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62d200,6,ffff80002db19580,1,ffff80002db19640) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_pwritev(ffff80002a62d200,ffff80002db196f0,ffff80002db19640) at sys_pwritev+0xb6 sys/kern/vfs_syscalls.c:3387 syscall(ffff80002db196f0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4a2973606f0, count: -15