panic: Caught invalid memory access at ffffffff851ea3b4 size 4 op 0 Stopped at db_enter+0x17: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *488492 79540 0 0 0x4000000 0K syz-executor 44973 9422 0 0x2 0 1 ifconfig db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff846365a7) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load4_noabort(ffffffff851ea3b4) at __asan_load4_noabort+0xa3 checkalias(ffff800001c9e548,7fff) at checkalias+0x47d sys/kern/vfs_subr.c:603 ffs_vinit(ffff800000d7d800,ffff80003a74f440) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 ffs_vget(ffff800000d7d800,6654,ffff80003a74f600) at ffs_vget+0x748 sys/ufs/ffs/ffs_vfsops.c:1285 ufs_lookup() at ufs_lookup+0x15c1 sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(ffff800001c9e398,ffff80003a74fee0,ffff80003a74ff10) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003a74feb0) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 namei(ffff80003a74feb0) at namei+0xe19 sys/kern/vfs_lookup.c:250 vn_open(ffff80003a74feb0,81,0) at vn_open+0x240 sys/kern/vfs_vnops.c:146 doopenat(ffff800045ffdca0,ffffff9c,200000000180,80,0,0,ffff80003a750210) at doopenat+0x460 sys/kern/vfs_syscalls.c:1163 sys_open(ffff800045ffdca0,ffff80003a750210,ffff80003a750180) at sys_open+0x86 sys/kern/vfs_syscalls.c:1065 syscall(ffff80003a750210) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a750210) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 end trace frame: 0xffff80003a750290, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: Caught invalid memory access at ffffffff851ea3b4 size 4 op 0 ddb{0}> show kasan KASAN: invalid read of 4 bytes at 0xffffffff851ea3b4 from pc 0xffffffff8402397d KASAN: first bad byte at 0xffffffff851ea3b4 (+0); shadow 0xfa: global redzone (out-of-bounds) KASAN: 0xffffffff851ea3b4 is 16 bytes to the right of the 4-byte global 'mem_no' (/syzkaller/managers/kasan/kernel/sys/arch/amd64/amd64/conf.c) KASAN: pc: checkalias+0x47d KASAN: call trace: #0 __asan_load4_noabort+0x82 kasan_shadow_check sys/kern/subr_kasan.c:1014 [inline] #0 __asan_load4_noabort+0x82 sys/kern/subr_kasan.c:1098 #1 checkalias+0x47d sys/kern/vfs_subr.c:603 #2 ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 #3 ffs_vget+0x748 sys/ufs/ffs/ffs_vfsops.c:1285 #4 ufs_lookup+0x15c1 sys/ufs/ufs/ufs_lookup.c:573 #5 VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 #6 vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 #7 namei+0xe19 sys/kern/vfs_lookup.c:250 #8 vn_open+0x240 sys/kern/vfs_vnops.c:146 #9 doopenat+0x460 sys/kern/vfs_syscalls.c:1163 #10 sys_open+0x86 sys/kern/vfs_syscalls.c:1065 #11 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #12 Xsyscall+0x128 KASAN: shadow of 0xffffffff851ea280..0xffffffff851ea500 (1 cell = 8 bytes): 0xffffffff851ea280: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0xffffffff851ea300: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa >0xffffffff851ea380: 00 fa fa fa 00 fa[fa]fa 00 fa fa fa 00 00 00 00 0xffffffff851ea400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0xffffffff851ea480: 00 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff846365a7) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load4_noabort(ffffffff851ea3b4) at __asan_load4_noabort+0xa3 checkalias(ffff800001c9e548,7fff) at checkalias+0x47d sys/kern/vfs_subr.c:603 ffs_vinit(ffff800000d7d800,ffff80003a74f440) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 ffs_vget(ffff800000d7d800,6654,ffff80003a74f600) at ffs_vget+0x748 sys/ufs/ffs/ffs_vfsops.c:1285 ufs_lookup() at ufs_lookup+0x15c1 sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(ffff800001c9e398,ffff80003a74fee0,ffff80003a74ff10) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003a74feb0) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 namei(ffff80003a74feb0) at namei+0xe19 sys/kern/vfs_lookup.c:250 vn_open(ffff80003a74feb0,81,0) at vn_open+0x240 sys/kern/vfs_vnops.c:146 doopenat(ffff800045ffdca0,ffffff9c,200000000180,80,0,0,ffff80003a750210) at doopenat+0x460 sys/kern/vfs_syscalls.c:1163 sys_open(ffff800045ffdca0,ffff80003a750210,ffff80003a750180) at sys_open+0x86 sys/kern/vfs_syscalls.c:1065 syscall(ffff80003a750210) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a750210) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x300dadf49f0, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003a74f0d0 rbx 0xffff80003a74f140 rdx 0 rcx 0xffffffff85373ff0 cpu_info_full_primary+0x1ff0 rax 0xffff80000016ca00 r8 0x101010101010101 r9 0x8080808080808080 r10 0xffff80003a74eeb8 r11 0xffffffff831b6f90 x86_bus_space_io_read_1 r12 0xffffffff846365a7 .str.1+0x9e147 r13 0xffffffff85374c08 cpu_info_full_primary+0x2c08 r14 0xffffffff85374e07 cpu_info_full_primary+0x2e07 r15 0x1 rip 0xffffffff830fa4f7 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff80003a74f0d0 ss 0x10 db_enter+0x17: popq %rbp ddb{0}> show proc PROC (syz-executor) tid=488492 pid=79540 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ffd4d8,0xffff800045ffc028 process=0xffff80003ab58e90 user=0xffff80003a745000, vmspace=0xffff800001c943f0 estcpu=36, cpticks=18, pctcpu=0.0, user=0, sys=18, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 93927 52088 99934 0 2 0x100000 0 sh 96231 271161 14554 0 2 0x40 0 syz-executor 79540 372351 70314 0 2 0 0 syz-executor *79540 488492 70314 0 7 0 0x4000000 syz-executor 9422 44973 39588 0 7 0x2 0 ifconfig 39588 33418 48437 0 3 0x100002 0x88 sigsusp sh 6207 25674 14927 0 2 0 0 syz-executor 6207 14744 14927 0 3 0 0x4000080 fsleep syz-executor 99934 33525 11494 0 2 0x100002 0 sh 38885 286687 69400 0 2 0x100002 0 sh 44419 442208 53675 0 2 0x100000 0 sh 53675 82984 50139 0 3 0x100002 0x88 sigsusp sh 46273 287586 27423 0 2 0x100002 0 sh 11494 188679 76106 0 3 0x2 0x80 wait syz-executor 14927 439940 76106 0 2 0x2 0xc80 syz-executor 14554 125538 76106 0 3 0x82 0 ppwait syz-executor 50139 219906 76106 0 3 0x2 0x80 wait syz-executor 27423 337616 76106 0 3 0x2 0x80 wait syz-executor 69400 379727 76106 0 3 0x2 0x80 wait syz-executor 70314 141970 76106 0 2 0x2 0 syz-executor 48437 519253 76106 0 3 0x2 0x80 wait syz-executor 76106 489141 44407 0 3 0x2 0x80 kqread syz-executor 44407 280077 99864 0 3 0x100002 0x88 sigsusp ksh 99864 355230 39082 0 3 0x10 0x88 kqread sshd-session 39082 465881 65460 0 3 0x12 0x80 kqread sshd-session 69040 168889 1 0 3 0x100003 0x80 ttyin getty 65460 394856 1 0 3 0 0x88 kqread sshd 35989 471691 43184 74 2 0x1100012 0x80 pflogd 43184 419317 1 0 3 0 0x80 sbwait pflogd 4326 437604 165 73 2 0x1100010 0x80 syslogd 165 215821 1 0 3 0x100002 0x80 sbwait syslogd 70558 84024 1 0 3 0x100000 0x80 kqread resolvd 99331 353545 46352 77 3 0x100012 0x80 kqread dhcpleased 89160 513378 46352 77 3 0x100012 0x80 kqread dhcpleased 46352 7110 1 0 3 0 0x80 kqread dhcpleased 49882 511440 0 0 2 0x14000 0x200 smr 66960 140527 0 0 2 0x14000 0x200 zerothread 55886 181526 0 0 3 0x14000 0x200 aiodoned aiodoned 59601 155191 0 0 3 0x14000 0x200 syncer update 53550 54775 0 0 3 0x14000 0x200 cleaner cleaner 85552 361535 0 0 3 0x14000 0x200 reaper reaper 85758 317791 0 0 3 0x14000 0x200 pgdaemon pagedaemon 40735 49727 0 0 3 0x14000 0x200 bored viomb 25777 513980 0 0 3 0x14000 0x40000200 acpi0 acpi0 62291 298475 0 0 3 0x14000 0x40000200 idle1 33570 330792 0 0 3 0x14000 0x200 bored softnet1 23892 511056 0 0 3 0x14000 0x200 bored softnet0 50883 457345 0 0 3 0x14000 0x200 smrbar systqmp 74234 148391 0 0 3 0x14000 0x200 bored systq 27900 405578 0 0 2 0x14000 0x200 softclockmp 87534 361130 0 0 3 0x14000 0x40000200 tmoslp softclock 77375 46247 0 0 3 0x14000 0x40000200 idle0 1 109726 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 79540 (syz-executor) thread 0xffff800045ffdca0 (488492) exclusive rrwlock inode r = 0 (0xffff800001c7c590) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0xda sys/ufs/ufs/ufs_ihash.c:146 #5 ffs_vget+0x2e9 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ufs_lookup+0x15c1 sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 #8 vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 #9 namei+0xe19 sys/kern/vfs_lookup.c:250 #10 vn_open+0x240 sys/kern/vfs_vnops.c:146 #11 doopenat+0x460 sys/kern/vfs_syscalls.c:1163 #12 sys_open+0x86 sys/kern/vfs_syscalls.c:1065 #13 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xffff800001c7c468) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527 #4 vn_lock+0xca sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x1f7 sys/kern/vfs_lookup.c:431 #6 namei+0xe19 sys/kern/vfs_lookup.c:250 #7 vn_open+0x240 sys/kern/vfs_vnops.c:146 #8 doopenat+0x460 sys/kern/vfs_syscalls.c:1163 #9 sys_open+0x86 sys/kern/vfs_syscalls.c:1065 #10 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff854ee7c0) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 doopenat+0x445 sys/kern/vfs_syscalls.c:1163 #2 sys_open+0x86 sys/kern/vfs_syscalls.c:1065 #3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #4 Xsyscall+0x128 Process 50883 (systqmp) thread 0xffff800045ffe7c8 (457345) shared rwlock systqmp r = 0 (0xffffffff85151698) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x1ba sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11050 12242K 12242K 166960K 12141 0 pcb 17 24K 24K 166960K 17 0 rtable 161 8K 8K 166960K 251 0 pf 34 22K 22K 166960K 45 0 ifaddr 33 7K 7K 166960K 35 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 13K 166960K 5 0 counters 70 42K 42K 166960K 70 0 ioctlops 0 0K 4K 166960K 1478 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1291 83K 83K 166960K 1362 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 2K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 292K 166960K 11964 0 file desc 21 77K 93K 166960K 115 0 proc 69 128K 209K 166960K 516 0 subproc 72 9K 9K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 in_multi 49 3K 3K 166960K 49 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 25 182K 182K 166960K 25 0 exec 0 0K 2K 166960K 374 0 fusefs mount 1 36K 36K 166960K 1 0 tdb 3 1K 1K 166960K 3 0 VM swap 14 124K 124K 166960K 15 0 UVM amap 208 241K 250K 166960K 3047 0 UVM aobj 3 4K 4K 166960K 3 0 pinsyscall 1070 1716K 1722K 166960K 1263 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 18 0K 0K 166960K 18 0 temp 34 9162K 9172K 166960K 3811 0 kqueue 13 40K 40K 166960K 25 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 29 0 26 1 0 1 1 0 8 0 rtentry 176 73 0 1 4 0 4 4 0 8 0 unpcb 144 39 0 22 1 0 1 1 0 8 0 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 8 0 4 1 0 1 1 0 8 0 arp 136 16 0 0 1 0 1 1 0 8 0 inpcb 328 60 0 53 2 0 2 2 0 8 1 nd6 152 8 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 14 0 0 1 0 1 1 0 8 0 pfstkey 128 14 0 0 1 0 1 1 0 8 0 pfstate 448 14 0 0 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 250 0 0 16 0 16 16 0 8 0 art_table 40 251 0 0 3 0 3 3 0 8 0 art_node 32 73 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1561 0 97 92 0 92 92 0 8 0 ffsino 296 1561 0 97 113 0 113 113 0 8 0 nchpl 144 1749 0 54 63 0 63 63 0 8 0 vnodes 216 1647 0 0 92 0 92 92 0 8 0 namei 1024 5297 0 5296 1 0 1 1 0 8 0 percpumem 16 51 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 0 2 0 2 2 0 8 0 scxspl 216 6590 0 6590 4 2 2 2 1 8 2 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 444 0 393 7 0 7 7 0 8 0 knotepl 120 53 0 0 2 0 2 2 0 8 0 kqueuepl 224 21 0 12 1 0 1 1 0 8 0 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 428 0 393 3 0 3 3 0 8 0 filepl 160 1534 0 1325 9 0 9 9 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 82 0 69 1 0 1 1 0 8 0 zombiepl 144 393 0 393 1 0 1 1 0 8 1 processpl 1232 444 0 393 5 0 5 5 0 8 0 procpl 664 446 0 393 5 0 5 5 0 8 0 sockpl 752 128 0 101 4 0 4 4 0 8 1 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 13 0 0 2 0 2 2 0 8 0 mextrefs 64 13 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 136 0 0 9 0 9 9 0 8 0 bufpl 272 2286 0 106 146 0 146 146 0 8 0 anonpl 32 3838 0 0 31 0 31 31 0 222 0 amapchunkpl 152 8272 0 7898 15 0 15 15 0 158 0 amappl16 200 1869 0 1861 5 0 5 5 0 8 4 amappl15 192 10 0 10 1 0 1 1 0 8 1 amappl14 184 423 0 416 1 0 1 1 0 8 0 amappl13 176 141 0 129 1 0 1 1 0 8 0 amappl12 168 673 0 643 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 0 1 1 0 8 1 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 274 0 273 1 0 1 1 0 8 0 amappl8 136 100 0 97 1 0 1 1 0 8 0 amappl7 128 178 0 164 1 0 1 1 0 8 0 amappl6 120 143 0 136 1 0 1 1 0 8 0 amappl5 112 107 0 97 1 0 1 1 0 8 0 amappl4 104 302 0 283 1 0 1 1 0 8 0 amappl3 96 1380 0 1289 3 0 3 3 0 8 0 amappl2 88 537 0 479 2 0 2 2 0 8 0 amappl1 80 10247 0 9632 15 0 15 15 0 8 0 amappl 88 2341 0 2208 4 0 4 4 0 92 1 uvmvnodes 80 98 0 0 2 0 2 2 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 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 428 0 393 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 428 0 393 1 0 1 1 0 8 0 vmmpekpl 168 5629 0 5597 2 0 2 2 0 8 0 vmmpepl 168 37010 0 35193 84 0 84 84 0 357 4 vmsppl 488 427 0 393 5 0 5 5 0 8 0 rwobjpl 80 14335 0 13318 23 0 23 23 0 8 0 pdppl 4096 864 0 786 98 12 86 86 0 8 8 pvpl 32 9105 0 0 74 0 74 74 0 265 0 pmappl 256 427 0 393 3 0 3 3 0 8 0 extentpl 40 47 0 29 1 0 1 1 0 8 0 phpool 120 398 0 16 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff846365a7) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load4_noabort(ffffffff851ea3b4) at __asan_load4_noabort+0xa3 checkalias(ffff800001c9e548,7fff) at checkalias+0x47d sys/kern/vfs_subr.c:603 ffs_vinit(ffff800000d7d800,ffff80003a74f440) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 ffs_vget(ffff800000d7d800,6654,ffff80003a74f600) at ffs_vget+0x748 sys/ufs/ffs/ffs_vfsops.c:1285 ufs_lookup() at ufs_lookup+0x15c1 sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(ffff800001c9e398,ffff80003a74fee0,ffff80003a74ff10) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003a74feb0) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 namei(ffff80003a74feb0) at namei+0xe19 sys/kern/vfs_lookup.c:250 vn_open(ffff80003a74feb0,81,0) at vn_open+0x240 sys/kern/vfs_vnops.c:146 doopenat(ffff800045ffdca0,ffffff9c,200000000180,80,0,0,ffff80003a750210) at doopenat+0x460 sys/kern/vfs_syscalls.c:1163 sys_open(ffff800045ffdca0,ffff80003a750210,ffff80003a750180) at sys_open+0x86 sys/kern/vfs_syscalls.c:1065 syscall(ffff80003a750210) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a750210) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x300dadf49f0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x19: leave x86_ipi_db(ffff800028ff3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff854edfc0) at __mp_lock+0x272 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff854edfc0) at __mp_lock+0x272 sys/kern/kern_lock.c:173 syscall(ffff8000336e4d80) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff8000336e4d80) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x788796631de0, count: 9 ddb{1}> trace x86_ipi_db(ffff800028ff3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff854edfc0) at __mp_lock+0x272 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff854edfc0) at __mp_lock+0x272 sys/kern/kern_lock.c:173 syscall(ffff8000336e4d80) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff8000336e4d80) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x788796631de0, count: -6