kernel: protection fault trap, code=0 Stopped at lf_advlock+0x223: addl $0x1,0x28(%rbx) ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace lf_advlock(ffff800000cfdbe0,0,fffffd80742b7ba0,8,ffff80002febbbc0,40) at lf_advlock+0x223 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800000cfdbe0,0,fffffd80742b7ba0,8,ffff80002febbbc0,40) at lf_advlock+0x223 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd8067cd61b8,fffffd80742b7ba0,8,ffff80002febbbc0,40) at VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:612 sys_fcntl(ffff8000212bf0a0,ffff80002febbc48,ffff80002febbc90) at sys_fcntl+0xad9 syscall(ffff80002febbd10) at syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff80002febbd10) at syscall+0x57c sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa99e77662e0, count: -5 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002febbad0 rbx 0xdeafbeaddeafbead rdx 0 rcx 0x5 rax 0xffff8000212bf0a0 r8 0xffff80002febbbc0 r9 0x40 r10 0x8dbe5cb065bba096 r11 0x66ecba334b5e4b9f r12 0xffff800000cfdbe0 r13 0x8 r14 0xffff80002febbbc0 r15 0 rip 0xffffffff815a23f3 lf_advlock+0x223 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002febba30 ss 0x10 lf_advlock+0x223: addl $0x1,0x28(%rbx) ddb{0}> show proc PROC (syz-executor.7) pid=89619 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000212bede8,0xffff8000212bf620 process=0xffff80002122d930 user=0xffff80002feb6000, vmspace=0xfffffd8074305018 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34039 425217 15737 32767 7 0x10 syz-executor.6 34039 43635 15737 32767 3 0x4000090 fsleep syz-executor.6 34039 134690 15737 32767 3 0x4000090 fsleep syz-executor.6 34039 13617 15737 32767 3 0x4000090 fsleep syz-executor.6 34039 396779 15737 32767 2 0x4000010 syz-executor.6 34039 309517 15737 32767 3 0x4000090 fsleep syz-executor.6 98886 5852 3868 32767 2 0x10 syz-executor.7 *98886 89619 3868 32767 7 0x4000010 syz-executor.7 98886 74714 3868 32767 3 0x4000010 lockflk syz-executor.7 55454 443212 39188 32767 2 0x400010 syz-executor.2 55454 358397 39188 32767 3 0x4400090 fsleep syz-executor.2 94895 522836 59466 32767 2 0x81010 syz-executor.3 94895 140911 59466 32767 3 0x4003010 suspend syz-executor.3 65740 351644 69148 32767 2 0x490 syz-executor.1 65740 427653 69148 32767 3 0x4000090 fsleep syz-executor.1 65740 136515 69148 32767 2 0x4000010 syz-executor.1 59466 224004 69389 32767 3 0x90 nanoslp syz-executor.3 69389 342840 20297 0 3 0x82 wait syz-executor.3 76223 34339 46826 32767 3 0x10 biowait syz-executor.4 46826 405598 20297 0 3 0x82 wait syz-executor.4 82152 176922 4611 32767 2 0x10 syz-executor.5 4611 20746 20297 0 3 0x82 wait syz-executor.5 69148 493110 26681 32767 3 0x90 nanoslp syz-executor.1 26681 4929 20297 0 3 0x82 wait syz-executor.1 39188 411191 80718 32767 3 0x90 nanoslp syz-executor.2 80718 343347 20297 0 3 0x82 wait syz-executor.2 8733 402942 0 0 3 0x14200 bored sosplice 3868 418361 30518 32767 3 0x90 nanoslp syz-executor.7 15737 227618 73272 32767 3 0x90 nanoslp syz-executor.6 30518 68091 20297 0 3 0x82 wait syz-executor.7 40064 503495 66872 0 3 0x100082 netio arp 73272 360095 20297 0 3 0x82 wait syz-executor.6 66872 350652 55676 0 3 0x10008a sigsusp sh 55676 37549 1 0 3 0x80 wait syz-executor.3 44593 296305 80253 32767 2 0x10 syz-executor.0 80253 313618 20297 0 3 0x82 wait syz-executor.0 20297 102289 1461 0 3 0x82 thrsleep syz-fuzzer 20297 253981 1461 0 3 0x4000082 nanoslp syz-fuzzer 20297 83109 1461 0 3 0x4000082 thrsleep syz-fuzzer 20297 200250 1461 0 3 0x4000082 wait syz-fuzzer 20297 500995 1461 0 3 0x4000082 wait syz-fuzzer 20297 449232 1461 0 3 0x4000082 thrsleep syz-fuzzer 20297 423655 1461 0 3 0x4000082 wait syz-fuzzer 20297 339575 1461 0 3 0x4000082 wait syz-fuzzer 20297 372693 1461 0 3 0x4000082 thrsleep syz-fuzzer 20297 397331 1461 0 3 0x4000082 thrsleep syz-fuzzer 20297 443105 1461 0 3 0x4000082 wait syz-fuzzer 20297 358770 1461 0 3 0x4000082 wait syz-fuzzer 20297 13337 1461 0 3 0x4000082 wait syz-fuzzer 20297 377796 1461 0 3 0x4000082 wait syz-fuzzer 20297 11808 1461 0 3 0x4000082 thrsleep syz-fuzzer 20297 58089 1461 0 3 0x4000082 kqread syz-fuzzer 1461 160819 69461 0 3 0x10008a sigsusp ksh 69461 359078 73605 0 3 0x9a kqread sshd 33111 392463 1 0 3 0x100083 ttyin getty 73605 281312 1 0 3 0x88 kqread sshd 50954 336696 48709 73 3 0x1100090 kqread syslogd 48709 513437 1 0 3 0x100082 netio syslogd 18538 205363 1 0 3 0x100080 kqread resolvd 96667 463530 14806 77 3 0x100092 kqread dhcpleased 16353 117552 14806 77 3 0x100092 kqread dhcpleased 14806 420735 1 0 3 0x80 kqread dhcpleased 2332 152860 0 0 3 0x14200 bored smr 16082 425367 0 0 2 0x14200 zerothread 20119 11595 0 0 3 0x14200 aiodoned aiodoned 34492 463071 0 0 3 0x14200 syncer update 37602 502684 0 0 3 0x14200 cleaner cleaner 11166 423150 0 0 3 0x14200 reaper reaper 7794 418529 0 0 3 0x14200 pgdaemon pagedaemon 69280 139023 0 0 3 0x14200 bored viomb 76790 384057 0 0 3 0x40014200 acpi0 acpi0 226 62759 0 0 3 0x40014200 idle1 54849 488840 0 0 3 0x14200 bored softnet 1992 178023 0 0 3 0x14200 bored softnet 77921 159038 0 0 3 0x14200 bored softnet 29499 117046 0 0 3 0x14200 bored softnet 56409 60244 0 0 3 0x14200 bored systqmp 56637 481308 0 0 3 0x14200 bored systq 92180 307347 0 0 2 0x40014200 softclock 99475 99571 0 0 3 0x40014200 idle0 1 280276 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 98886 (syz-executor.7) thread 0xffff8000212bf0a0 (89619) exclusive rwlock lockflk r = 0 (0xffffffff82b48f20) #0 witness_lock+0x44d #1 lf_advlock+0x195 sys/kern/vfs_lockf.c:260 #2 VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:612 #3 sys_fcntl+0xad9 #4 syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] #4 syscall+0x57c sys/arch/amd64/amd64/trap.c:626 #5 Xsyscall+0x128 Process 76223 (syz-executor.4) thread 0xffff8000212a58a0 (34339) exclusive rrwlock inode r = 0 (0xfffffd807ae1b1b0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #10 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807ae1ba30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #8 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #9 Xsyscall+0x128 Process 82152 (syz-executor.5) thread 0xffff8000212a4dc0 (176922) exclusive rrwlock inode r = 0 (0xfffffd807ae1b5f0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #10 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807ae1b2c0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #8 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #9 Xsyscall+0x128 Process 44593 (syz-executor.0) thread 0xffff80002121d5e0 (296305) exclusive rrwlock inode r = 0 (0xfffffd807ae1bc50) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #10 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bcd5f88) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #8 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 6413K 6421K 78643K 11371 0 pcb 13 12K 14K 78643K 17 0 rtable 242 6K 7K 78643K 2126 0 ifaddr 73 24K 24K 78643K 177 0 sysctl 3 1K 3K 78643K 10 0 counters 60 35K 35K 78643K 94 0 ioctlops 0 0K 2K 78643K 123 0 iov 0 0K 28K 78643K 1948 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1285 80K 80K 78643K 7177 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 132 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4024 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 26 97K 117K 78643K 9822 0 sigio 0 0K 0K 78643K 296 0 proc 56 78K 103K 78643K 1518 0 subproc 117 7K 7K 78643K 325 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1047 0 in_multi 99 6K 7K 78643K 427 0 ether_multi 1 0K 0K 78643K 34 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 1805 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 395 101K 115K 78643K 72712 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 1 0K 0K 78643K 801 0 NDP 11 0K 1K 78643K 76 0 temp 128 5778K 5906K 78643K 28190 0 kqueue 12 18K 26K 78643K 914 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1508 0 1504 21 19 2 4 0 8 1 rtentry 112 313 0 199 4 0 4 4 0 8 0 unpcb 144 16850 0 16834 91 85 6 10 0 8 5 syncache 296 148 0 148 19 18 1 1 0 8 1 tcpqe 32 139 0 139 18 18 0 1 0 8 0 tcpcb 776 6228 0 6222 94 86 8 12 0 8 6 arp 120 54 0 36 1 0 1 1 0 8 0 ipq 40 6 0 6 5 4 1 1 0 8 1 ipqe 40 54 0 54 5 4 1 1 0 8 1 inpcb 368 13513 0 13503 119 111 8 22 0 8 6 ip6q 72 41 0 41 5 5 0 1 0 8 0 ip6af 40 123 0 123 5 5 0 1 0 8 0 nd6 48 92 0 64 1 0 1 1 0 8 0 kcovpl 48 25 0 16 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1289 0 822 35 5 30 30 0 8 0 art_table 32 1290 0 822 4 0 4 4 0 8 0 art_node 16 312 0 208 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 14 1 1 0 1 0 8 0 semupl 112 6 0 6 2 2 0 1 0 8 0 semapl 112 3988 0 3978 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 18641 0 17193 92 0 92 92 0 8 0 ffsino 272 18642 0 17193 98 0 98 98 0 8 0 nchpl 144 32012 0 30379 63 0 63 63 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 128212 0 128209 4 3 1 2 0 8 0 percpumem 16 60 0 17 1 0 1 1 0 8 0 kstatmem 264 56 0 34 2 0 2 2 0 8 0 scxspl 216 89684 0 89683 41 38 3 8 0 8 2 plimitpl 152 2615 0 2590 9 7 2 2 0 8 0 sigapl 424 10081 0 10026 7 0 7 7 0 8 0 futexpl 64 101269 0 101263 4 3 1 1 0 8 0 knotepl 120 572 0 0 10 0 10 10 0 8 0 kqueuepl 216 4469 0 4458 82 77 5 12 0 8 4 pipepl 320 3739 0 3708 98 87 11 15 0 8 8 fdescpl 496 10063 0 10026 7 1 6 6 0 8 0 filepl 152 108151 0 107885 145 126 19 27 0 8 8 lockfpl 104 15400 0 15398 2 1 1 2 0 8 0 lockfspl 48 2846 0 2844 1 0 1 1 0 8 0 sessionpl 144 40 0 23 1 0 1 1 0 8 0 pgrppl 48 189 0 172 1 0 1 1 0 8 0 ucredpl 104 31812 0 31794 1 0 1 1 0 8 0 zombiepl 144 10027 0 10026 2 1 1 1 0 8 0 processpl 1072 10081 0 10026 5 1 4 5 0 8 0 procpl 696 30566 0 30485 22 13 9 10 0 8 0 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 136 0 136 16 16 0 1 0 8 0 sockpl 488 32226 0 32196 628 616 12 42 0 8 8 mcl64k 65536 41 0 0 4 1 3 3 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 26 0 0 3 0 3 3 0 8 0 mcl4k 4096 66 0 0 8 3 5 8 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 386 0 0 39 11 28 39 0 8 2 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 9279 0 0 556 0 556 556 0 8 0 bufpl 288 22498 0 16171 453 0 453 453 0 8 0 anonpl 24 2169661 0 2155338 254 143 111 137 0 186 5 amapchunkpl 152 212346 0 211571 119 86 33 44 0 158 0 amappl16 200 24436 0 24042 176 146 30 45 0 8 8 amappl15 192 42 0 41 1 0 1 1 0 8 0 amappl14 184 196 0 184 1 0 1 1 0 8 0 amappl13 176 13 0 13 4 4 0 1 0 8 0 amappl12 168 605 0 598 1 0 1 1 0 8 0 amappl11 160 52 0 41 1 0 1 1 0 8 0 amappl10 152 61 0 44 1 0 1 1 0 8 0 amappl9 144 1032 0 1031 1 0 1 1 0 8 0 amappl8 136 620 0 496 5 0 5 5 0 8 0 amappl7 128 230 0 204 2 0 2 2 0 8 0 amappl6 120 319 0 299 1 0 1 1 0 8 0 amappl5 112 378 0 372 1 0 1 1 0 8 0 amappl4 104 851 0 815 3 2 1 3 0 8 0 amappl3 96 31289 0 31223 2 0 2 2 0 8 0 amappl2 88 10993 0 10906 7 4 3 3 0 8 1 amappl1 80 236624 0 235787 23 4 19 22 0 8 0 amappl 88 71624 0 71389 7 1 6 6 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 10063 0 10026 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10063 0 10026 1 0 1 1 0 8 0 vmmpekpl 168 93248 0 93183 4 0 4 4 0 8 0 vmmpepl 168 946896 0 943826 267 120 147 159 0 357 2 vmsppl 368 10062 0 10026 4 0 4 4 0 8 0 rwobjpl 56 265613 0 257865 129 17 112 116 0 8 0 pdppl 4096 20133 0 20052 330 243 87 93 0 8 6 pvpl 32 4141082 0 4120130 516 304 212 271 0 265 20 pmappl 248 10062 0 10026 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1756 0 380 40 0 40 40 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace lf_advlock(ffff800000cfdbe0,0,fffffd80742b7ba0,8,ffff80002febbbc0,40) at lf_advlock+0x223 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800000cfdbe0,0,fffffd80742b7ba0,8,ffff80002febbbc0,40) at lf_advlock+0x223 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd8067cd61b8,fffffd80742b7ba0,8,ffff80002febbbc0,40) at VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:612 sys_fcntl(ffff8000212bf0a0,ffff80002febbc48,ffff80002febbc90) at sys_fcntl+0xad9 syscall(ffff80002febbd10) at syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff80002febbd10) at syscall+0x57c sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa99e77662e0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7ffffbf8f0, count: -3