panic: kernel diagnostic assertion "part >= 0 && part < MAXPARTITIONS" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/subr_disk.c", line 1169 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 12470 45833 0 0 0x4000000 1K syz-executor 323818 69618 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a3608) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833de253,ffffffff833bee08,491,ffffffff833d2418) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff8000001a1048,13,2000,1) at disk_openpart+0x20d sdopen(d13,102,2000,ffff80003abfa2d8) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c4569d8) at spec_open+0x2d9 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806545a038,102,fffffd80097fd618,ffff80003abfa2d8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 vn_open(ffff80003c456b80,102,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 sys_ktrace(ffff80003abfa2d8,ffff80003c456d60,ffff80003c456cb0) at sys_ktrace+0x9a sys/kern/kern_ktrace.c:551 syscall(ffff80003c456d60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456d60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3c52955600, count: 4 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "part >= 0 && part < MAXPARTITIONS" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/subr_disk.c", line 1169 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a3608) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833de253,ffffffff833bee08,491,ffffffff833d2418) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff8000001a1048,13,2000,1) at disk_openpart+0x20d sdopen(d13,102,2000,ffff80003abfa2d8) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c4569d8) at spec_open+0x2d9 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806545a038,102,fffffd80097fd618,ffff80003abfa2d8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 vn_open(ffff80003c456b80,102,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 sys_ktrace(ffff80003abfa2d8,ffff80003c456d60,ffff80003c456cb0) at sys_ktrace+0x9a sys/kern/kern_ktrace.c:551 syscall(ffff80003c456d60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456d60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3c52955600, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4567a0 rbx 0xffff8000299eee07 rdx 0xffff80000002a580 rcx 0xffff80003abfa2d8 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x58d5dd1d9f92b29e r11 0x4d2fdaab1dd710c5 r12 0xffff8000299eec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81f52ef5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c456790 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=12470 pid=45833 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003abfa040,0xffffffff83976910 process=0xffff8000fffe7510 user=0xffff80003c451000, vmspace=0xfffffd806f7d51f0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45833 211676 88573 0 2 0 syz-executor *45833 12470 88573 0 7 0x4000000 syz-executor 69618 323818 33810 0 7 0 syz-executor 69618 263391 33810 0 2 0x4000000 syz-executor 9559 390355 59325 0 2 0 syz-executor 94591 120131 22821 0 2 0 syz-executor 94591 1295 22821 0 3 0x4000080 fsleep syz-executor 54127 310665 84230 0 2 0 syz-executor 54127 117797 84230 0 3 0x4000080 fsleep syz-executor 31119 87829 19386 -1 2 0x10 syz-executor 31119 86862 19386 -1 3 0x4000090 piperd syz-executor 33754 456932 67911 0 3 0x80 nanoslp syz-executor 33754 118825 67911 0 3 0x4000080 kqread syz-executor 33754 201546 67911 0 3 0x4000080 fsleep syz-executor 98286 411824 70218 0 3 0x80 nanoslp syz-executor 98286 105866 70218 0 3 0x4000080 sbwait syz-executor 98286 372549 70218 0 3 0x4000080 fsleep syz-executor 70218 274979 11547 0 3 0x82 nanoslp syz-executor 63675 310423 0 0 3 0x14280 nfsidl nfsio 28975 431377 0 0 3 0x14280 nfsidl nfsio 15883 507152 0 0 3 0x14280 nfsidl nfsio 76551 517364 0 0 3 0x14280 nfsidl nfsio 30613 345905 0 0 3 0x14280 nfsidl nfsio 9460 279163 0 0 3 0x14280 nfsidl nfsio 80615 187007 0 0 3 0x14280 nfsidl nfsio 51403 476719 0 0 3 0x14280 nfsidl nfsio 88888 125185 0 0 3 0x14280 nfsidl nfsio 96043 19314 0 0 3 0x14280 nfsidl nfsio 22555 242579 0 0 3 0x14280 nfsidl nfsio 45405 400602 0 0 3 0x14280 nfsidl nfsio 24247 82896 0 0 3 0x14280 nfsidl nfsio 86611 362949 0 0 3 0x14280 nfsidl nfsio 16650 77796 0 0 3 0x14280 nfsidl nfsio 11493 322013 0 0 3 0x14280 nfsidl nfsio 96560 507898 0 0 3 0x14280 nfsidl nfsio 37543 20919 0 0 3 0x14280 nfsidl nfsio 14316 368762 0 0 3 0x14280 nfsidl nfsio 8191 122587 0 0 3 0x14280 nfsidl nfsio 41691 370625 1 0 3 0x100083 ttyin getty 33810 481226 11547 0 3 0x82 nanoslp syz-executor 67911 474781 11547 0 3 0x82 nanoslp syz-executor 19386 271134 11547 0 3 0x82 nanoslp syz-executor 22821 33771 11547 0 3 0x82 nanoslp syz-executor 84230 16363 11547 0 3 0x82 nanoslp syz-executor 59325 281216 11547 0 3 0x82 nanoslp syz-executor 88573 133846 11547 0 3 0x82 nanoslp syz-executor 11547 309185 84349 0 3 0x82 kqread syz-executor 84349 412565 48585 0 3 0x10008a sigsusp ksh 48585 249172 16531 0 3 0x98 kqread sshd-session 16531 291957 43784 0 3 0x92 kqread sshd-session 43784 174399 1 0 3 0x88 kqread sshd 75055 468283 31182 74 3 0x1100092 bpf pflogd 31182 25390 1 0 3 0x80 sbwait pflogd 4378 487351 77068 73 3 0x1100090 kqread syslogd 77068 206848 1 0 3 0x100082 sbwait syslogd 6364 293977 1 0 3 0x100080 kqread resolvd 94514 271074 97429 77 3 0x100092 kqread dhcpleased 26250 45343 97429 77 3 0x100092 kqread dhcpleased 97429 436652 1 0 3 0x80 kqread dhcpleased 25385 155152 0 0 3 0x14200 bored smr 68681 510056 0 0 2 0x14200 zerothread 18011 393726 0 0 3 0x14200 aiodoned aiodoned 71179 169335 0 0 3 0x14200 syncer update 63185 450101 0 0 3 0x14200 cleaner cleaner 61776 194741 0 0 3 0x14200 reaper reaper 23302 370586 0 0 3 0x14200 pgdaemon pagedaemon 47730 351513 0 0 3 0x14200 bored viomb 31662 257845 0 0 3 0x40014200 acpi0 acpi0 36327 202625 0 0 3 0x40014200 idle1 11731 72422 0 0 3 0x14200 bored softnet1 90281 349874 0 0 3 0x14200 bored softnet0 29892 233485 0 0 3 0x14200 smrbar systqmp 61662 440223 0 0 3 0x14200 bored systq 2713 65312 0 0 3 0x14200 tmoslp softclockmp 28400 490727 0 0 3 0x40014200 tmoslp softclock 93672 209669 0 0 3 0x40014200 idle0 1 410892 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 45833 (syz-executor) thread 0xffff80003abfa2d8 (12470) exclusive rwlock dklk r = 0 (0xffff8000001a1070) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sdopen+0x196 sys/scsi/sd.c:337 #3 spec_open+0x2d9 sys/kern/spec_vnops.c:150 #4 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #5 vn_open+0x6a0 sys/kern/vfs_vnops.c:177 #6 sys_ktrace+0x9a sys/kern/kern_ktrace.c:551 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839643c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:765 #2 Xsyscall+0x128 Process 29892 (systqmp) thread 0xffff8000ffffe298 (233485) shared rwlock systqmp r = 0 (0xffffffff837a7848) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 11045K 11500K 166960K 12079 0 pcb 17 13K 13K 166960K 136 0 rtable 181 8K 9K 166960K 499 0 pf 29 16K 67486K 166960K 111 0 ifaddr 32 5K 8K 166960K 86 0 ifgroup 43 2K 2K 166960K 134 0 sysctl 4 1K 9K 166960K 18 0 counters 62 36K 38K 166960K 158 0 ioctlops 0 0K 4K 166960K 1633 0 iov 1 4K 24K 166960K 48 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 85K 166960K 1840 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 34 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 835 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 164K 166960K 634 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 65 0 in_multi 66 4K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 444 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 237 159K 177K 166960K 9533 0 UVM aobj 30 10K 10K 166960K 32 0 pinsyscall 43 86K 112K 166960K 1991 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 39 0 NDP 11 0K 2K 166960K 56 0 temp 79 8672K 8784K 166960K 44840 0 kqueue 13 20K 30K 166960K 176 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 114 0 111 1 0 1 1 0 8 0 rtentry 176 150 0 78 6 0 6 6 0 8 1 unpcb 144 366 0 345 1 0 1 1 0 8 0 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpcb 736 255 0 251 7 0 7 7 0 8 6 arp 136 25 0 10 1 0 1 1 0 8 0 inpcb 328 834 0 823 12 3 9 9 0 8 7 nd6 152 29 0 14 2 0 2 2 0 8 0 pkpcb 40 68 0 68 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 36 0 36 1 0 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pffrag 232 3 0 2 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 6 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 45 0 17 1 0 1 1 0 8 0 pfstkey 128 45 0 17 2 0 2 2 0 8 0 pfstate 448 44 0 17 4 0 4 4 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 619 0 328 31 2 29 31 0 8 5 art_table 40 623 0 328 5 0 5 5 0 8 0 art_node 32 149 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 2 1 1 1 0 8 1 semapl 112 32 0 22 1 0 1 1 0 8 0 shmpl 112 26 0 2 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2879 0 1368 96 0 96 96 0 8 0 ffsino 296 2879 0 1368 118 0 118 118 0 8 0 nchpl 144 4051 0 2350 64 0 64 64 0 8 0 rtmask 32 10 0 10 2 1 1 1 0 8 1 vnodes 216 3177 0 0 177 0 177 177 0 8 0 namei 1024 13673 0 13673 2 1 1 2 0 8 1 percpumem 16 94 0 48 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 840 3 0 0 1 0 1 1 0 8 0 kstatmem 264 78 0 58 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 21952 0 21952 9 2 7 8 1 8 7 plimitpl 152 186 0 169 1 0 1 1 0 8 0 sigapl 424 1153 0 1085 9 1 8 8 0 8 0 knotepl 120 561 0 0 17 0 17 17 0 8 0 kqueuepl 224 259 0 248 3 1 2 2 0 8 1 pipepl 344 237 0 208 3 0 3 3 0 8 0 fdescpl 528 1116 0 1084 3 0 3 3 0 8 0 filepl 160 6846 0 6620 18 2 16 16 0 8 4 lockfpl 104 276 0 274 1 0 1 1 0 8 0 lockfspl 48 113 0 111 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 978 0 963 1 0 1 1 0 8 0 zombiepl 144 1085 0 1085 1 0 1 1 0 8 1 processpl 1232 1153 0 1085 6 0 6 6 0 8 0 procpl 664 2304 0 2227 9 1 8 8 0 8 0 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 1394 0 1359 18 4 14 14 0 8 9 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 48 0 0 6 0 6 6 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 233 0 0 15 0 15 15 0 8 0 bufpl 280 8518 0 2381 439 0 439 439 0 8 0 anonpl 32 11771 0 0 95 0 95 95 0 246 0 amapchunkpl 152 30291 0 29822 36 4 32 32 0 158 8 amappl16 200 4449 0 4416 40 27 13 28 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 10 0 9 1 0 1 1 0 8 0 amappl13 176 477 0 476 1 0 1 1 0 8 0 amappl12 168 1493 0 1451 3 0 3 3 0 8 0 amappl11 160 5 0 4 1 0 1 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 45 0 42 1 0 1 1 0 8 0 amappl7 128 85 0 84 1 0 1 1 0 8 0 amappl6 120 298 0 285 1 0 1 1 0 8 0 amappl5 112 92 0 81 1 0 1 1 0 8 0 amappl4 104 437 0 405 1 0 1 1 0 8 0 amappl3 96 5241 0 5152 4 1 3 3 0 8 0 amappl2 88 1256 0 1179 2 0 2 2 0 8 0 amappl1 80 12810 0 12226 15 1 14 15 0 8 0 amappl 88 8641 0 8481 5 0 5 5 0 92 0 uvmvnodes 80 128 0 0 3 0 3 3 0 8 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 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 31 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1116 0 1084 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1116 0 1084 1 0 1 1 0 8 0 vmmpekpl 168 10857 0 10807 3 0 3 3 0 8 0 vmmpepl 168 78788 0 76850 109 9 100 109 0 357 9 vmsppl 488 1115 0 1084 6 1 5 5 0 8 0 rwobjpl 80 23982 0 22912 33 4 29 33 0 8 0 pdppl 4096 2245 0 2171 108 32 76 87 0 8 2 pvpl 32 19807 0 0 161 1 160 160 0 265 0 pmappl 256 1118 0 1084 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 302 0 39 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8386fff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7b0eb9f450a0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff8386fff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7b0eb9f450a0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a3608) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833de253,ffffffff833bee08,491,ffffffff833d2418) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff8000001a1048,13,2000,1) at disk_openpart+0x20d sdopen(d13,102,2000,ffff80003abfa2d8) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c4569d8) at spec_open+0x2d9 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806545a038,102,fffffd80097fd618,ffff80003abfa2d8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 vn_open(ffff80003c456b80,102,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 sys_ktrace(ffff80003abfa2d8,ffff80003c456d60,ffff80003c456cb0) at sys_ktrace+0x9a sys/kern/kern_ktrace.c:551 syscall(ffff80003c456d60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456d60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3c52955600, count: 4 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a3608) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833de253,ffffffff833bee08,491,ffffffff833d2418) at __assert+0x29 sys/kern/subr_prf.c:-1 disk_openpart(ffff8000001a1048,13,2000,1) at disk_openpart+0x20d sdopen(d13,102,2000,ffff80003abfa2d8) at sdopen+0x261 sys/scsi/sd.c:429 spec_open(ffff80003c4569d8) at spec_open+0x2d9 sys/kern/spec_vnops.c:150 VOP_OPEN(fffffd806545a038,102,fffffd80097fd618,ffff80003abfa2d8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 vn_open(ffff80003c456b80,102,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 sys_ktrace(ffff80003abfa2d8,ffff80003c456d60,ffff80003c456cb0) at sys_ktrace+0x9a sys/kern/kern_ktrace.c:551 syscall(ffff80003c456d60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456d60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3c52955600, count: -11