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 *342827 23787 60929 0x10 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82576b14) at panic+0x161 sys/kern/subr_prf.c:198 __assert(ffffffff825ee919,ffffffff8260b2c3,eb,ffffffff826297ea) at __assert+0x25 sys/kern/subr_prf.c:157 buf_unmap(fffffd807684e6e8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd80688534b8) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd80658048c8,25,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179 getblk(fffffd80658048c8,25,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047 ffs2_balloc(fffffd807a8963c8,94000,4000,fffffd807f7d7340,0,ffff800024becf08) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff800024becfa0) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346 VOP_WRITE(fffffd80658048c8,ffff800024bed1c0,13,fffffd807f7d7340) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8071030178,ffff800024bed1c0,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002178a540,5,ffff800024bed1c0,0,ffff800024bed2c0) at dofilewritev+0x19c sys/kern/sys_generic.c:375 sys_writev(ffff80002178a540,ffff800024bed268,ffff800024bed2c0) at sys_writev+0xa7 sys/kern/sys_generic.c:322 syscall(ffff800024bed330) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 end trace frame: 0xffff800024bed3b0, 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:437 panic(ffffffff82576b14) at panic+0x161 sys/kern/subr_prf.c:198 __assert(ffffffff825ee919,ffffffff8260b2c3,eb,ffffffff826297ea) at __assert+0x25 sys/kern/subr_prf.c:157 buf_unmap(fffffd807684e6e8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd80688534b8) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd80658048c8,25,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179 getblk(fffffd80658048c8,25,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047 ffs2_balloc(fffffd807a8963c8,94000,4000,fffffd807f7d7340,0,ffff800024becf08) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff800024becfa0) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346 VOP_WRITE(fffffd80658048c8,ffff800024bed1c0,13,fffffd807f7d7340) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8071030178,ffff800024bed1c0,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002178a540,5,ffff800024bed1c0,0,ffff800024bed2c0) at dofilewritev+0x19c sys/kern/sys_generic.c:375 sys_writev(ffff80002178a540,ffff800024bed268,ffff800024bed2c0) at sys_writev+0xa7 sys/kern/sys_generic.c:322 syscall(ffff800024bed330) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x446c7fa7e70, count: -15 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800024bec850 rbx 0x4000001 __kernel_phys_end+0x1400001 rdx 0xffff800000c39e40 rcx 0 rax 0xffff80002178a540 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe2c4b2a82e29453b r11 0x5f364f4278a5b507 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff821a3328 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800024bec840 ss 0 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=342827 stat=onproc flags process=10 proc=4000000 pri=17, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002178a000,0xffff80002178ba50 process=0xffff8000225c0ff0 user=0xffff800024be8000, vmspace=0xfffffd807f015aa0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 97922 328526 47896 0 2 0 syz-executor.2 97922 507941 47896 0 3 0x4000080 fsleep syz-executor.2 389 467155 99211 0 2 0 syz-executor.3 389 410286 99211 0 3 0x4000080 fsleep syz-executor.3 23787 113100 51454 60929 2 0x10 syz-executor.0 *23787 342827 51454 60929 7 0x4000010 syz-executor.0 82743 61599 26944 0 2 0 syz-executor.5 35041 291715 63426 0 2 0 syz-executor.6 35041 79043 63426 0 3 0x4000080 fsleep syz-executor.6 95157 324214 94972 0 2 0 syz-executor.1 95157 129913 94972 0 3 0x4000080 fsleep syz-executor.1 94972 70896 93515 0 3 0x82 nanoslp syz-executor.1 47896 13537 93515 0 3 0x82 nanoslp syz-executor.2 99211 259966 93515 0 3 0x82 nanoslp syz-executor.3 51454 213422 93515 0 3 0x82 nanoslp syz-executor.0 33529 471114 0 0 3 0x14280 nfsidl nfsio 56527 516110 0 0 3 0x14280 nfsidl nfsio 60346 196840 0 0 3 0x14280 nfsidl nfsio 56455 284892 0 0 3 0x14280 nfsidl nfsio 50330 422344 0 0 3 0x14280 nfsidl nfsio 75133 285525 0 0 3 0x14280 nfsidl nfsio 33767 468187 0 0 3 0x14280 nfsidl nfsio 70491 359288 0 0 3 0x14280 nfsidl nfsio 57304 342186 0 0 3 0x14280 nfsidl nfsio 56968 99703 0 0 3 0x14280 nfsidl nfsio 24998 520886 0 0 3 0x14280 nfsidl nfsio 7521 294435 0 0 3 0x14280 nfsidl nfsio 60923 257611 0 0 3 0x14280 nfsidl nfsio 74076 459380 0 0 3 0x14280 nfsidl nfsio 58669 161801 0 0 3 0x14280 nfsidl nfsio 70023 428492 0 0 3 0x14280 nfsidl nfsio 68888 311920 0 0 3 0x14280 nfsidl nfsio 38498 194126 0 0 3 0x14280 nfsidl nfsio 46579 183927 0 0 3 0x14280 nfsidl nfsio 10810 280175 0 0 3 0x14280 nfsidl nfsio 258 60773 93515 0 3 0x82 nanoslp syz-executor.4 73684 318344 93515 0 3 0x82 nanoslp syz-executor.7 63426 392228 93515 0 3 0x82 nanoslp syz-executor.6 26944 171807 93515 0 3 0x82 nanoslp syz-executor.5 14717 106073 0 0 3 0x14200 bored sosplice 93515 384994 29035 0 3 0x82 thrsleep syz-fuzzer 93515 92676 29035 0 3 0x4000082 nanoslp syz-fuzzer 93515 218540 29035 0 3 0x4000082 thrsleep syz-fuzzer 93515 395110 29035 0 3 0x4000082 wait syz-fuzzer 93515 458943 29035 0 3 0x4000082 thrsleep syz-fuzzer 93515 395604 29035 0 3 0x4000082 wait syz-fuzzer 93515 97494 29035 0 3 0x4000082 wait syz-fuzzer 93515 236974 29035 0 3 0x4000082 thrsleep syz-fuzzer 93515 344167 29035 0 3 0x4000082 wait syz-fuzzer 93515 114514 29035 0 3 0x4000082 wait syz-fuzzer 93515 222921 29035 0 3 0x4000082 wait syz-fuzzer 93515 488140 29035 0 3 0x4000082 kqread syz-fuzzer 93515 116727 29035 0 3 0x4000082 wait syz-fuzzer 93515 423711 29035 0 3 0x4000082 wait syz-fuzzer 29035 68645 95412 0 3 0x10008a sigsusp ksh 95412 213503 46739 0 3 0x9a kqread sshd 16610 260762 1 0 3 0x100083 ttyin getty 46739 502709 1 0 3 0x88 kqread sshd 72199 364349 23259 73 3 0x1100090 kqread syslogd 23259 412584 1 0 3 0x100082 netio syslogd 49928 247903 1 0 3 0x100080 kqread resolvd 43217 457285 36905 77 3 0x100092 kqread dhcpleased 10265 346336 36905 77 3 0x100092 kqread dhcpleased 36905 444638 1 0 3 0x80 kqread dhcpleased 24982 406562 0 0 3 0x14200 bored smr 59470 22298 0 0 2 0x14200 zerothread 87858 381931 0 0 3 0x14200 aiodoned aiodoned 71684 101978 0 0 3 0x14200 syncer update 63992 435537 0 0 3 0x14200 cleaner cleaner 84442 236541 0 0 3 0x14200 reaper reaper 77489 130012 0 0 3 0x14200 pgdaemon pagedaemon 80842 225647 0 0 3 0x14200 bored viomb 46072 243531 0 0 3 0x40014200 acpi0 acpi0 1861 60889 0 0 3 0x14200 bored softnet 34131 53469 0 0 3 0x14200 bored softnet 96139 475081 0 0 3 0x14200 bored softnet 1076 197064 0 0 3 0x14200 bored softnet 85164 120577 0 0 3 0x14200 bored systqmp 9581 413671 0 0 3 0x14200 bored systq 76557 293279 0 0 3 0x40014200 bored softclock 45464 493967 0 0 3 0x40014200 idle0 1 226001 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 10200 6414K 7126K 78643K 17243 0 pcb 14 13K 17K 78643K 3247 0 rtable 221 11K 14K 78643K 1418 0 ifaddr 108 22K 22K 78643K 473 0 sysctl 2 0K 2K 78643K 7 0 counters 27 17K 17K 78643K 75 0 ioctlops 0 0K 4K 78643K 1201 0 iov 0 0K 16K 78643K 290 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1368 85K 86K 78643K 3062 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 131 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 77K 78643K 3196 0 sigio 0 0K 0K 78643K 180 0 proc 58 59K 91K 78643K 986 0 subproc 104 6K 6K 78643K 312 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 37 0 in_multi 93 6K 6K 78643K 340 0 ether_multi 1 0K 0K 78643K 11 0 mrt 1 0K 0K 78643K 19 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 163 731K 731K 78643K 163 0 exec 0 0K 2K 78643K 1354 0 pfkey data 0 0K 0K 78643K 3 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 8 62K 64K 78643K 10 0 UVM amap 273 215K 215K 78643K 18297 0 UVM aobj 113 3K 4K 78643K 122 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 95 0 NDP 16 0K 2K 78643K 112 0 temp 139 4726K 5749K 78643K 65399 0 kqueue 12 18K 24K 78643K 137 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 120 210 0 207 2 1 1 2 0 8 0 rtentry 112 349 0 257 4 1 3 4 0 8 0 unpcb 144 2388 0 2373 32 29 3 6 0 8 2 syncache 296 48 0 48 9 8 1 1 0 8 1 tcpqe 32 15 27 15 3 3 0 1 0 8 0 tcpcb 768 1040 0 1032 34 25 9 9 0 8 8 arp 88 51 0 37 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 5 0 5 1 1 0 1 0 8 0 inpcb 336 5230 0 5219 56 47 9 13 0 8 8 ip6q 72 5 0 4 2 1 1 1 0 8 0 ip6af 40 9 0 8 2 1 1 1 0 8 0 nd6 48 79 0 57 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 2 0 1 0 8 0 kcovpl 48 24 0 16 1 0 1 1 0 8 0 ppxss 1160 29 0 29 5 5 0 1 0 8 0 pfstscr 40 47 0 45 2 1 1 1 0 8 0 pfosfp 40 4 0 2 1 0 1 1 0 8 0 pfosfpen 112 4 0 0 1 0 1 1 0 8 0 pfrke_plain 168 14 0 14 3 3 0 1 0 8 0 pfrktable 1344 195 0 192 1 0 1 1 0 8 0 pfanchor 1280 281 0 35 21 0 21 21 0 8 0 pftag 88 9 0 8 2 1 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 120 58 0 54 2 1 1 1 0 8 0 pfstate 336 47 0 45 2 1 1 1 0 8 0 pfrule 1360 224 0 150 7 0 7 7 0 8 0 rttmr 136 7 0 7 2 2 0 1 0 8 0 art_heap8 4096 8 0 7 4 2 2 3 0 8 1 art_heap4 256 1606 0 1161 36 8 28 30 0 8 0 art_table 32 1614 0 1168 4 0 4 4 0 8 0 art_node 16 348 0 268 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 0 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 129 0 119 1 0 1 1 0 8 0 shmpl 112 119 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5228 0 3785 91 0 91 91 0 8 0 ffsino 240 5228 0 3785 86 0 86 86 0 8 0 nchpl 144 9240 0 7600 63 1 62 63 0 8 0 rtmask 32 33 0 33 3 3 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 33569 0 33569 4 3 1 2 0 8 1 vcpupl 2048 13 0 1 2 0 2 2 0 8 0 vmpool 536 16 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 56 0 56 4 4 0 1 0 8 0 kstatmem 264 114 0 86 2 0 2 2 0 8 0 scxspl 216 26486 0 26477 16 13 3 8 0 8 2 plimitpl 152 649 0 633 1 0 1 1 0 8 0 sigapl 424 3476 0 3410 8 0 8 8 0 8 0 futexpl 64 28839 0 28835 1 0 1 1 0 8 0 knotepl 120 33996 0 33916 16 9 7 11 0 8 3 kqueuepl 184 413 0 405 9 8 1 4 0 8 0 pipepl 288 535 0 507 11 8 3 5 0 8 0 fdescpl 432 3439 0 3412 4 0 4 4 0 8 0 filepl 120 23018 0 22777 39 28 11 16 0 8 2 lockfpl 104 807 0 805 2 1 1 2 0 8 0 lockfspl 48 251 0 249 1 0 1 1 0 8 0 sessionpl 144 39 0 23 1 0 1 1 0 8 0 pgrppl 48 53 0 37 1 0 1 1 0 8 0 ucredpl 104 2701 0 2690 1 0 1 1 0 8 0 zombiepl 144 3412 0 3410 1 0 1 1 0 8 0 processpl 1000 3476 0 3410 11 2 9 9 0 8 0 procpl 672 7942 0 7858 12 2 10 10 0 8 2 sosppl 168 16 0 16 3 3 0 1 0 8 0 sockpl 456 7852 0 7823 190 178 12 33 0 8 8 mcl64k 65536 85 0 85 4 3 1 1 0 8 1 mcl16k 16384 40 0 40 7 6 1 1 0 8 1 mcl12k 12288 90 0 90 4 3 1 1 0 8 1 mcl9k 9216 37 0 37 6 6 0 1 0 8 0 mcl8k 8192 372 0 372 4 3 1 1 0 8 1 mcl4k 4096 357 0 357 2 1 1 1 0 8 1 mcl2k2 2112 15 0 15 6 5 1 1 0 8 1 mcl2k 2048 75910 0 75847 15 5 10 11 0 8 0 mtagpl 96 990 0 668 14 3 11 12 0 8 0 mbufpl 256 151169 0 150654 107 62 45 75 0 8 1 bufpl 288 8229 0 1816 459 0 459 459 0 8 0 anonpl 24 599645 0 585065 131 27 104 117 0 188 0 amapchunkpl 152 58156 0 57554 48 21 27 38 0 158 0 amappl16 200 8306 0 7712 48 15 33 44 0 8 0 amappl15 192 160 0 157 2 1 1 1 0 8 0 amappl14 184 558 0 555 1 0 1 1 0 8 0 amappl13 176 245 0 242 1 0 1 1 0 8 0 amappl12 168 80 0 78 1 0 1 1 0 8 0 amappl11 160 821 0 804 1 0 1 1 0 8 0 amappl10 152 395 0 389 1 0 1 1 0 8 0 amappl9 144 1279 0 1265 1 0 1 1 0 8 0 amappl8 136 1081 0 1021 3 0 3 3 0 8 0 amappl7 128 495 0 470 1 0 1 1 0 8 0 amappl6 120 1028 0 1010 2 1 1 2 0 8 0 amappl5 112 2531 0 2516 1 0 1 1 0 8 0 amappl4 104 2700 0 2666 4 3 1 2 0 8 0 amappl3 96 9050 0 9002 2 0 2 2 0 8 0 amappl2 88 3631 0 3568 2 0 2 2 0 8 0 amappl1 80 82270 0 81561 26 10 16 21 0 8 0 amappl 88 17523 0 17364 4 0 4 4 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 72 121 0 9 3 0 3 3 0 8 0 uaddrrnd 24 3455 0 3416 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3455 0 3416 1 0 1 1 0 8 0 vmmpekpl 168 27679 0 27624 3 0 3 3 0 8 0 vmmpepl 168 338121 0 335415 173 39 134 135 0 357 7 vmsppl 272 3454 0 3416 5 2 3 3 0 8 0 rwobjpl 24 84457 0 76760 47 0 47 47 0 8 0 pdppl 4096 6916 0 6844 321 245 76 76 0 8 4 pvpl 32 1289104 0 1269507 313 135 178 259 0 265 0 pmappl 216 3454 0 3416 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1229 0 398 24 0 24 24 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:437 panic(ffffffff82576b14) at panic+0x161 sys/kern/subr_prf.c:198 __assert(ffffffff825ee919,ffffffff8260b2c3,eb,ffffffff826297ea) at __assert+0x25 sys/kern/subr_prf.c:157 buf_unmap(fffffd807684e6e8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd80688534b8) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd80658048c8,25,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179 getblk(fffffd80658048c8,25,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047 ffs2_balloc(fffffd807a8963c8,94000,4000,fffffd807f7d7340,0,ffff800024becf08) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff800024becfa0) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346 VOP_WRITE(fffffd80658048c8,ffff800024bed1c0,13,fffffd807f7d7340) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8071030178,ffff800024bed1c0,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002178a540,5,ffff800024bed1c0,0,ffff800024bed2c0) at dofilewritev+0x19c sys/kern/sys_generic.c:375 sys_writev(ffff80002178a540,ffff800024bed268,ffff800024bed2c0) at sys_writev+0xa7 sys/kern/sys_generic.c:322 syscall(ffff800024bed330) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x446c7fa7e70, count: -15 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82576b14) at panic+0x161 sys/kern/subr_prf.c:198 __assert(ffffffff825ee919,ffffffff8260b2c3,eb,ffffffff826297ea) at __assert+0x25 sys/kern/subr_prf.c:157 buf_unmap(fffffd807684e6e8) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235 buf_map(fffffd80688534b8) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117 buf_get(fffffd80658048c8,25,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1179 getblk(fffffd80658048c8,25,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1047 ffs2_balloc(fffffd807a8963c8,94000,4000,fffffd807f7d7340,0,ffff800024becf08) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736 ffs_write(ffff800024becfa0) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:346 VOP_WRITE(fffffd80658048c8,ffff800024bed1c0,13,fffffd807f7d7340) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8071030178,ffff800024bed1c0,0) at vn_write+0x152 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002178a540,5,ffff800024bed1c0,0,ffff800024bed2c0) at dofilewritev+0x19c sys/kern/sys_generic.c:375 sys_writev(ffff80002178a540,ffff800024bed268,ffff800024bed2c0) at sys_writev+0xa7 sys/kern/sys_generic.c:322 syscall(ffff800024bed330) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x446c7fa7e70, count: -15