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 *506925 23847 0 0 0x1 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161 buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182 getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050 ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349 VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315 sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173 syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 end trace frame: 0xffff80002e8df670, 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(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161 buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182 getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050 ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349 VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315 sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173 syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae60, count: -15 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002e8deb40 rbx 0x4000001 __kernel_phys_end+0x1400001 rdx 0 rcx 0 rax 0xffff8000216647e0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfdd1f31140dfad65 r11 0xa5b700d4cbbc2d0c r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff81373428 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e8deb30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=506925 stat=onproc flags process=0 proc=1 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000216cd7b0,0xffff800021664010 process=0xffff80002166e820 user=0xffff80002e8da000, vmspace=0xfffffd807e15d890 estcpu=36, cpticks=4, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *23847 506925 85149 0 7 0x1 syz-executor.1 23847 512691 85149 0 3 0x4000080 netio syz-executor.1 23847 476826 85149 0 3 0x4000080 kqread syz-executor.1 89328 114504 91847 0 3 0x80 nanoslp syz-executor.3 89328 20712 91847 0 3 0x4000080 ttyout syz-executor.3 95246 59820 90907 0 3 0x82 piperd syz-executor.7 85149 289603 90907 0 3 0x82 nanoslp syz-executor.1 91847 175822 90907 0 3 0x82 nanoslp syz-executor.3 14988 143860 90907 0 3 0x82 piperd syz-executor.4 95190 521807 90907 0 3 0x82 piperd syz-executor.6 34705 4302 90907 0 3 0x82 piperd syz-executor.5 79737 485789 90907 0 3 0x2 biowait syz-executor.0 9631 377889 1 0 3 0x100083 ttyin getty 38335 227834 0 0 3 0x14200 acct acct 30210 5523 0 0 3 0x14280 nfsidl nfsio 98982 102921 0 0 3 0x14280 nfsidl nfsio 96671 427491 0 0 3 0x14280 nfsidl nfsio 48395 191094 0 0 3 0x14280 nfsidl nfsio 7284 294449 0 0 3 0x14280 nfsidl nfsio 98026 355252 0 0 3 0x14280 nfsidl nfsio 58365 37836 0 0 3 0x14280 nfsidl nfsio 47099 145362 0 0 3 0x14280 nfsidl nfsio 92931 200730 0 0 3 0x14280 nfsidl nfsio 43594 247699 0 0 3 0x14280 nfsidl nfsio 37644 334620 0 0 3 0x14280 nfsidl nfsio 25208 336665 0 0 3 0x14280 nfsidl nfsio 90922 362139 0 0 3 0x14280 nfsidl nfsio 67830 357951 0 0 3 0x14280 nfsidl nfsio 75518 330188 0 0 3 0x14280 nfsidl nfsio 75190 90965 0 0 3 0x14280 nfsidl nfsio 73055 64474 0 0 3 0x14280 nfsidl nfsio 93175 332372 0 0 3 0x14280 nfsidl nfsio 66185 77137 0 0 3 0x14280 nfsidl nfsio 51320 346101 0 0 3 0x14280 nfsidl nfsio 69052 358289 0 0 3 0x14200 bored sosplice 39008 96959 90907 0 3 0x82 piperd syz-executor.2 90907 263776 71848 0 3 0x82 thrsleep syz-fuzzer 90907 172353 71848 0 3 0x4000082 thrsleep syz-fuzzer 90907 396137 71848 0 3 0x4000082 thrsleep syz-fuzzer 90907 407783 71848 0 3 0x4000082 thrsleep syz-fuzzer 90907 34626 71848 0 3 0x4000082 kqread syz-fuzzer 90907 328986 71848 0 3 0x4000082 thrsleep syz-fuzzer 90907 198163 71848 0 3 0x4000082 thrsleep syz-fuzzer 90907 349376 71848 0 3 0x4000082 thrsleep syz-fuzzer 90907 518397 71848 0 3 0x4000082 thrsleep syz-fuzzer 71848 143218 79048 0 3 0x10008a sigsusp ksh 79048 421921 14926 0 3 0x9a kqread sshd 14926 265503 1 0 3 0x88 kqread sshd 7753 515567 26242 73 3 0x1100090 kqread syslogd 26242 482600 1 0 3 0x100082 netio syslogd 46949 89457 1 0 3 0x100080 kqread resolvd 38004 194443 56376 77 3 0x100092 kqread dhcpleased 93919 32602 56376 77 3 0x100092 kqread dhcpleased 56376 437886 1 0 3 0x80 kqread dhcpleased 45551 518308 0 0 3 0x14200 bored smr 91826 266654 0 0 2 0x14200 zerothread 89660 156001 0 0 3 0x14200 aiodoned aiodoned 17314 87907 0 0 3 0x14200 syncer update 137 458406 0 0 3 0x14200 cleaner cleaner 65362 6419 0 0 3 0x14200 reaper reaper 68017 183700 0 0 3 0x14200 pgdaemon pagedaemon 39218 442289 0 0 3 0x14200 bored viomb 19975 95523 0 0 3 0x40014200 acpi0 acpi0 72984 250174 0 0 3 0x14200 bored softnet 57300 85980 0 0 3 0x14200 bored systqmp 46581 361770 0 0 3 0x14200 bored systq 43910 95438 0 0 3 0x40014200 bored softclock 64834 284931 0 0 3 0x40014200 idle0 1 127049 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 10206 6444K 6896K 78643K 32947 0 pcb 13 16K 18K 78643K 1328 0 rtable 240 16K 17K 78643K 8105 0 ifaddr 97 20K 21K 78643K 2326 0 sysctl 3 1K 1K 78643K 3 0 counters 28 17K 17K 78643K 125 0 ioctlops 0 0K 4K 78643K 12969 0 iov 0 0K 32K 78643K 2132 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1330 83K 84K 78643K 22985 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 111 0 VM map 2 0K 0K 78643K 2 0 sem 10 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 69K 78643K 19886 0 sigio 0 0K 0K 78643K 185 0 proc 60 55K 71K 78643K 1687 0 subproc 104 6K 6K 78643K 498 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1577 0 in_multi 95 6K 6K 78643K 683 0 ether_multi 1 0K 0K 78643K 87 0 mrt 1 0K 0K 78643K 44 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 235 1049K 1049K 78643K 235 0 exec 0 0K 2K 78643K 2303 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 426 579K 581K 78643K 241512 0 UVM aobj 131 9K 9K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 452 0 NDP 14 0K 2K 78643K 200 0 temp 144 4721K 5081K 78643K 85516 0 kqueue 12 18K 28K 78643K 1142 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 120 360 0 357 3 2 1 2 0 8 0 rtentry 112 551 0 447 4 0 4 4 0 8 0 unpcb 136 14315 0 14300 72 71 1 6 0 8 0 syncache 296 23 0 23 7 7 0 1 0 8 0 tcpqe 32 7 0 7 3 3 0 1 0 8 0 tcpcb 736 9512 0 9507 204 200 4 17 0 8 3 arp 88 90 0 71 1 0 1 1 0 8 0 ipq 40 14 0 13 7 6 1 1 0 8 0 ipqe 40 44 0 43 7 6 1 1 0 8 0 inpcb 312 14230 0 14223 173 167 6 11 0 8 5 rttmr 72 13 0 13 4 4 0 1 0 8 0 ip6q 72 5 0 5 3 2 1 1 0 8 1 ip6af 40 8 0 8 2 1 1 1 0 8 1 nd6 48 142 0 117 1 0 1 1 0 8 0 pkpcb 40 63 0 63 7 7 0 1 0 8 0 kcovpl 48 38 0 30 1 0 1 1 0 8 0 ppxss 1152 35 0 35 9 9 0 1 0 8 0 pfrktable 1344 3092 0 3090 3 2 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 6 1 0 1 1 0 8 0 pfstate 320 4 0 3 1 0 1 1 0 8 0 pfrule 1360 682 0 653 8 5 3 7 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2561 0 2143 50 23 27 29 0 8 0 art_table 32 2562 0 2143 4 0 4 4 0 8 0 art_node 16 550 0 457 1 0 1 1 0 8 0 sysvmsgpl 40 76 0 39 2 1 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 40946 0 39477 92 0 92 92 0 8 0 ffsino 240 40946 0 39477 87 0 87 87 0 8 0 nchpl 144 76450 0 74834 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 292719 0 292718 3 2 1 2 0 8 0 vcpupl 1984 105 0 3 14 1 13 13 0 8 0 vmpool 528 155 0 53 8 1 7 7 0 8 0 pfiaddrpl 120 780 0 780 3 3 0 1 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 138663 0 138661 25 24 1 8 0 8 0 plimitpl 152 1176 0 1161 1 0 1 1 0 8 0 sigapl 424 20134 0 20076 8 0 8 8 0 8 0 futexpl 64 291120 0 291120 1 0 1 1 0 8 1 knotepl 120 216370 0 216290 69 62 7 8 0 8 4 kqueuepl 184 8676 0 8666 41 40 1 4 0 8 0 pipepl 304 2392 0 2364 73 70 3 8 0 8 0 fdescpl 432 20099 0 20076 4 0 4 4 0 8 0 filepl 120 215234 0 214987 169 156 13 16 0 8 5 lockfpl 104 7560 0 7558 9 8 1 2 0 8 0 lockfspl 48 2583 0 2581 1 0 1 1 0 8 0 sessionpl 144 54 0 38 1 0 1 1 0 8 0 pgrppl 48 127 0 111 1 0 1 1 0 8 0 ucredpl 96 85865 0 85849 1 0 1 1 0 8 0 zombiepl 144 20076 0 20076 2 1 1 1 0 8 1 processpl 1000 20134 0 20076 11 2 9 9 0 8 0 procpl 672 49004 0 48935 45 37 8 9 0 8 0 sosppl 168 95 0 95 20 20 0 1 0 8 0 sockpl 448 28969 0 28944 355 344 11 26 0 8 8 mcl64k 65536 461 0 461 40 39 1 1 0 8 1 mcl16k 16384 125 0 125 32 31 1 1 0 8 1 mcl12k 12288 649 0 649 36 35 1 1 0 8 1 mcl9k 9216 244 0 244 38 37 1 1 0 8 1 mcl8k 8192 4332 0 4332 11 10 1 1 0 8 1 mcl4k 4096 2455 0 2455 11 10 1 1 0 8 1 mcl2k2 2112 121 0 121 30 29 1 1 0 8 1 mcl2k 2048 117952 0 117873 36 24 12 20 0 8 0 mtagpl 96 2114 0 1862 25 18 7 9 0 8 0 mbufpl 256 304198 0 303734 86 54 32 40 0 8 0 bufpl 288 30324 0 23916 458 0 458 458 0 8 0 anonpl 24 5415894 0 5395392 358 203 155 157 0 188 13 amapchunkpl 152 577875 0 577161 126 91 35 47 0 158 0 amappl16 200 53307 0 52517 226 175 51 55 0 8 8 amappl15 192 3869 0 3864 1 0 1 1 0 8 0 amappl14 184 7086 0 7075 1 0 1 1 0 8 0 amappl13 176 2539 0 2537 1 0 1 1 0 8 0 amappl12 168 1610 0 1602 2 1 1 1 0 8 0 amappl11 160 1440 0 1427 1 0 1 1 0 8 0 amappl10 152 3083 0 3082 3 2 1 1 0 8 0 amappl9 144 1905 0 1901 1 0 1 1 0 8 0 amappl8 136 3353 0 3240 5 0 5 5 0 8 1 amappl7 128 2273 0 2260 1 0 1 1 0 8 0 amappl6 120 1729 0 1704 2 1 1 2 0 8 0 amappl5 112 18106 0 18095 1 0 1 1 0 8 0 amappl4 104 7332 0 7279 2 0 2 2 0 8 0 amappl3 96 3432 0 3419 1 0 1 1 0 8 0 amappl2 88 7409 0 7353 3 1 2 3 0 8 0 amappl1 80 357994 0 357489 19 6 13 18 0 8 0 amappl 88 239947 0 239720 7 0 7 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 20254 0 20129 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 20254 0 20129 1 0 1 1 0 8 0 vmmpekpl 168 126797 0 126723 4 0 4 4 0 8 0 vmmpepl 168 1786898 0 1784275 335 189 146 169 0 357 6 vmsppl 272 20253 0 20129 9 0 9 9 0 8 0 rwobjpl 24 424386 0 416543 53 3 50 50 0 8 0 pdppl 4096 40514 0 40360 823 657 166 166 0 8 12 pvpl 32 8837518 0 8815082 626 397 229 259 0 265 27 pmappl 216 20253 0 20129 8 0 8 8 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2485 0 1568 27 0 27 27 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(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161 buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182 getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050 ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349 VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315 sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173 syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae60, 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(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161 buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182 getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050 ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349 VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315 sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173 syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae60, count: -15