uvm_fault(0xffffffff8354a888, 0xffff8000296a2050, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 423739 8539 0 0 0 1 syz-executor *356386 62310 0 0x2 0x1 0K syz-executor ffs2_balloc(fffffd806e15c780,59398,44,fffffd807f7d3680,1,ffff80002a0b0148) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0b01d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807210d708,ffff80002a0b0288,3,fffffd807f7d3680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff6f50,fffffd807210d708,fffffd807f7d3680,ffff80002a0b0350,ffff80002a0b0330) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrnamei(ffff8000ffff6f50,ffff800029fe6c00) at ktrnamei+0x13a sys/kern/kern_ktrace.c:217 namei(ffff80002a0b0658) at namei+0x2a2 sys/kern/vfs_lookup.c:170 vn_open(ffff80002a0b0658,30001,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140 doopenat(ffff8000ffff6f50,ffffff9c,71b8f5261f10,30000,0,ffff80002a0b0800) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff80002a0b08b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b08b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71b8f5261a10, count: 5 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: uvm_fault(0xffffffff8354a888, 0xffff8000296a2050, 0, 1) -> d ddb{0}> trace ffs2_balloc(fffffd806e15c780,59398,44,fffffd807f7d3680,1,ffff80002a0b0148) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0b01d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807210d708,ffff80002a0b0288,3,fffffd807f7d3680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff6f50,fffffd807210d708,fffffd807f7d3680,ffff80002a0b0350,ffff80002a0b0330) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrnamei(ffff8000ffff6f50,ffff800029fe6c00) at ktrnamei+0x13a sys/kern/kern_ktrace.c:217 namei(ffff80002a0b0658) at namei+0x2a2 sys/kern/vfs_lookup.c:170 vn_open(ffff80002a0b0658,30001,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140 doopenat(ffff8000ffff6f50,ffffff9c,71b8f5261f10,30000,0,ffff80002a0b0800) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff80002a0b08b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b08b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71b8f5261a10, count: -10 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a0b00f0 rbx 0 rdx 0 rcx 0xffff8000296a2000 rax 0xa r8 0xffffffffffffffff r9 0xffff80002a0b0148 r10 0xe2ba21e716a07a2a r11 0x956cd316d5ae2177 r12 0x10 r13 0x1 r14 0xffffffff r15 0xfffffd805ab8e360 rip 0xffffffff828c492e ffs2_balloc+0x9fe cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a0aff80 ss 0 ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 ddb{0}> show proc PROC (syz-executor) tid=356386 pid=62310 tcnt=1 stat=onproc flags process=2 proc=1 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff76e8,0xffff8000ffff62b8 process=0xffff800036596d50 user=0xffff80002a0ab000, vmspace=0xfffffd80092fe000 estcpu=36, cpticks=3, pctcpu=0.12, user=0, sys=28, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8539 423739 63613 0 7 0 syz-executor 8539 148343 63613 0 2 0x4000000 syz-executor 69677 145015 86595 0 2 0 syz-executor 69677 271657 86595 0 3 0x4000080 fsleep syz-executor 19197 171019 79235 0 2 0 syz-executor 19197 12929 79235 0 3 0x4000080 fsleep syz-executor 56758 186028 54807 0 2 0 syz-executor 56758 247163 54807 0 3 0x4000080 fsleep syz-executor 67130 242836 62392 0 2 0 syz-executor 67130 367875 62392 0 3 0x4000080 fsleep syz-executor 67130 399785 62392 0 3 0x4000080 lockf syz-executor 67130 384077 62392 0 3 0x4000080 fsleep syz-executor 57853 45198 77675 0 2 0x2 syz-executor 79235 31803 77675 0 3 0x82 nanoslp syz-executor 65639 518850 77675 0 3 0x82 nanoslp syz-executor 62392 427624 77675 0 3 0x82 nanoslp syz-executor 54807 54972 77675 0 3 0x82 nanoslp syz-executor *62310 356386 77675 0 7 0x3 syz-executor 86595 155531 77675 0 3 0x82 nanoslp syz-executor 63613 506675 77675 0 3 0x82 nanoslp syz-executor 78452 299855 0 0 3 0x14200 bored sosplice 77675 485178 64476 0 2 0x2 syz-executor 64476 115801 89298 0 3 0x10008a sigsusp ksh 89298 332916 43469 0 3 0x98 kqread sshd-session 43469 335388 11780 0 3 0x92 kqread sshd-session 74466 514819 1 0 3 0x100083 ttyopn getty 11780 387764 1 0 3 0x88 kqread sshd 32593 283041 57435 74 3 0x1100092 bpf pflogd 57435 449927 1 0 3 0x80 sbwait pflogd 24925 323325 88221 73 3 0x1100090 kqread syslogd 88221 486793 1 0 3 0x100082 sbwait syslogd 30475 451087 1 0 3 0x100080 kqread resolvd 16687 390617 20134 77 3 0x100092 kqread dhcpleased 18000 166291 20134 77 3 0x100092 kqread dhcpleased 20134 155655 1 0 3 0x80 kqread dhcpleased 42722 64656 0 0 3 0x14200 bored smr 96860 143716 0 0 2 0x14200 zerothread 98684 498581 0 0 3 0x14200 aiodoned aiodoned 31538 220859 0 0 3 0x14200 syncer update 36270 192838 0 0 3 0x14200 cleaner cleaner 29826 42220 0 0 3 0x14200 reaper reaper 78541 484738 0 0 3 0x14200 pgdaemon pagedaemon 40582 169316 0 0 3 0x14200 bored viomb 50970 350145 0 0 3 0x40014200 acpi0 acpi0 92823 151636 0 0 3 0x40014200 idle1 12524 49387 0 0 3 0x14200 bored softnet3 26446 29031 0 0 3 0x14200 bored softnet2 88685 4229 0 0 3 0x14200 bored softnet1 13162 223070 0 0 3 0x14200 bored softnet0 42747 394278 0 0 3 0x14200 bored systqmp 93104 62863 0 0 3 0x14200 bored systq 26545 233063 0 0 3 0x14200 tmoslp softclockmp 71721 432859 0 0 2 0x40014200 softclock 67855 247004 0 0 3 0x40014200 idle0 1 377100 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 8539 (syz-executor) thread 0xffff800036fb51f0 (148343) exclusive rwlock vmmaplk r = 0 (0xfffffd806c87fb58) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 #4 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 #5 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 57853 (syz-executor) thread 0xffff800036fb4038 (45198) exclusive rwlock vmmaplk r = 0 (0xfffffd806be89eb8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3822 #4 process_new+0x553 sys/kern/kern_fork.c:279 #5 fork1+0x3ea sys/kern/kern_fork.c:405 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806c87f630) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3813 #4 process_new+0x553 sys/kern/kern_fork.c:279 #5 fork1+0x3ea sys/kern/kern_fork.c:405 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 62310 (syz-executor) thread 0xffff8000ffff6f50 (356386) exclusive rrwlock inode r = 0 (0xfffffd806e15c818) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ktrwriteraw+0x172 sys/kern/kern_ktrace.c:679 #7 ktrnamei+0x13a sys/kern/kern_ktrace.c:217 #8 namei+0x2a2 sys/kern/vfs_lookup.c:170 #9 vn_open+0x13f sys/kern/vfs_vnops.c:140 #10 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #11 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #11 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83561d10) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 pool_get+0x242 sys/kern/subr_pool.c:589 #5 namei+0xdf sys/kern/vfs_lookup.c:145 #6 vn_open+0x13f sys/kern/vfs_vnops.c:140 #7 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10205 10108K 10421K 166960K 11783 0 pcb 17 14K 16K 166960K 178 0 rtable 239 8K 8K 166960K 901 0 pf 37 18K 18K 166960K 128 0 ifaddr 41 7K 7K 166960K 122 0 ifgroup 59 2K 2K 166960K 138 0 sysctl 3 0K 0K 166960K 4 0 counters 66 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1529 0 iov 0 0K 12K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1426 90K 90K 166960K 1905 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 93K 166960K 785 0 sigio 0 0K 0K 166960K 18 0 proc 72 91K 128K 166960K 1031 0 subproc 104 6K 6K 166960K 312 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 135 0 in_multi 90 6K 7K 166960K 316 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 613 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 227 72K 79K 166960K 7969 0 UVM aobj 87 4K 4K 166960K 87 0 pinsyscall 42 84K 106K 166960K 2285 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 25 0 NDP 13 0K 2K 166960K 85 0 temp 48 6817K 6882K 166960K 20500 0 kqueue 13 20K 28K 166960K 92 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 251 0 248 6 5 1 4 0 8 0 rtentry 112 308 0 199 5 1 4 4 0 8 0 unpcb 144 294 0 277 2 0 2 2 0 8 1 syncache 336 7 0 7 4 3 1 1 0 8 1 tcpcb 808 216 0 210 8 4 4 7 0 8 3 arp 120 52 0 35 1 0 1 1 0 8 0 inpcb 336 760 0 747 14 7 7 7 0 8 5 nd6 136 80 0 55 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 24 0 16 1 0 1 1 0 8 0 ppxss 1168 3 0 3 2 2 0 1 0 8 0 pffrag 232 6 0 3 1 0 1 1 0 482 0 pffrnode 88 6 0 3 1 0 1 1 0 8 0 pffrent 40 11 0 8 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 86 0 20 1 0 1 1 0 8 0 pfstkey 128 88 0 22 3 0 3 3 0 8 0 pfstate 376 86 0 21 7 0 7 7 0 8 0 pfrule 1344 22 0 16 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1239 0 791 32 3 29 29 0 8 0 art_table 32 1240 0 791 4 0 4 4 0 8 0 art_node 16 306 0 208 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 1 1 0 1 1 0 8 0 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 84 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2306 0 767 97 0 97 97 0 8 0 ffsino 272 2306 0 767 104 0 104 104 0 8 0 nchpl 144 3110 0 1405 64 0 64 64 0 8 0 uvmvnodes 80 2839 0 0 58 0 58 58 0 8 0 vnodes 216 2839 0 0 158 0 158 158 0 8 0 namei 1024 11664 0 11663 5 4 1 2 0 8 0 percpumem 16 68 0 21 1 0 1 1 0 8 0 kstatmem 264 68 0 42 2 0 2 2 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 16765 0 16765 12 9 3 8 1 8 3 plimitpl 152 117 0 100 1 0 1 1 0 8 0 sigapl 424 1075 0 1025 10 3 7 9 0 8 0 futexpl 64 6598 0 6593 2 1 1 1 0 8 0 knotepl 120 571 0 0 17 0 17 17 0 8 0 kqueuepl 216 341 0 332 8 2 6 8 0 8 5 pipepl 320 338 0 311 10 5 5 8 0 8 2 fdescpl 496 1036 0 1005 6 1 5 5 0 8 0 filepl 152 5319 0 5061 29 13 16 20 0 8 5 lockfpl 104 423 0 419 2 0 2 2 0 8 1 lockfspl 48 141 0 138 1 0 1 1 0 8 0 sessionpl 144 41 0 32 1 0 1 1 0 8 0 pgrppl 48 86 0 69 1 0 1 1 0 8 0 ucredpl 104 572 0 559 1 0 1 1 0 8 0 zombiepl 144 1161 0 1160 2 1 1 1 0 8 0 processpl 1160 1075 0 1025 6 1 5 6 0 8 0 procpl 648 1772 0 1715 9 3 6 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 5 0 5 2 1 1 1 0 8 1 sockpl 664 1316 0 1283 26 17 9 12 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 236 0 0 30 0 30 30 0 8 0 mtagpl 96 93 0 0 3 0 3 3 0 8 0 mbufpl 256 485 0 0 29 0 29 29 0 8 0 bufpl 280 7188 0 878 451 0 451 451 0 8 0 anonpl 24 228571 0 225211 118 71 47 99 0 185 14 amapchunkpl 152 26278 0 25807 60 30 30 51 0 158 8 amappl16 200 5376 0 5354 33 19 14 14 0 8 11 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 158 0 145 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1939 0 1908 4 2 2 3 0 8 0 amappl11 160 61 0 47 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 173 0 173 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 143 0 131 1 0 1 1 0 8 0 amappl6 120 401 0 400 1 0 1 1 0 8 0 amappl5 112 207 0 196 1 0 1 1 0 8 0 amappl4 104 356 0 338 1 0 1 1 0 8 0 amappl3 96 4915 0 4807 4 0 4 4 0 8 0 amappl2 88 918 0 850 2 0 2 2 0 8 0 amappl1 80 11093 0 10530 16 2 14 14 0 8 1 amappl 88 7433 0 7268 5 0 5 5 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 86 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1036 0 1005 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1036 0 1005 1 0 1 1 0 8 0 vmmpekpl 168 10639 0 10588 3 0 3 3 0 8 0 vmmpepl 168 71713 0 69896 107 12 95 95 0 357 9 vmsppl 440 1035 0 1005 6 2 4 5 0 8 0 rwobjpl 56 27099 0 23263 64 6 58 58 0 8 0 pdppl 4096 2079 0 2010 123 52 71 85 0 8 2 pvpl 32 36480 0 0 295 1 294 294 0 265 0 pmappl 248 1035 0 1005 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 459 0 77 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs2_balloc(fffffd806e15c780,59398,44,fffffd807f7d3680,1,ffff80002a0b0148) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a0b01d0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807210d708,ffff80002a0b0288,3,fffffd807f7d3680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff6f50,fffffd807210d708,fffffd807f7d3680,ffff80002a0b0350,ffff80002a0b0330) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrnamei(ffff8000ffff6f50,ffff800029fe6c00) at ktrnamei+0x13a sys/kern/kern_ktrace.c:217 namei(ffff80002a0b0658) at namei+0x2a2 sys/kern/vfs_lookup.c:170 vn_open(ffff80002a0b0658,30001,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140 doopenat(ffff8000ffff6f50,ffffff9c,71b8f5261f10,30000,0,ffff80002a0b0800) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff80002a0b08b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b08b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71b8f5261a10, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x769a8fcbd160, count: 12 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x769a8fcbd160, count: -3