uvm_fault(0xffffffff82a471a8, 0xffff80001ef3f004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND 302132 350 0 0 0 1 syz-executor.0 * 84703 30427 0 0 0x4000000 0K syz-executor.1 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806f30aa08,ffff80002e40ea88,ffff80002e40eab8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e40ea58) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002e40ea58) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff80002e40ea58,216,0) at vn_open+0x188 sys/kern/vfs_vnops.c:113 doopenat(ffff80002af0ba40,ffffff9c,20001640,615,0,ffff80002e40ec40) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff80002e40ecb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e40ecb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x97a1bfe4900, count: 7 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(0xffffffff82a471a8, 0xffff80001ef3f004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806f30aa08,ffff80002e40ea88,ffff80002e40eab8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e40ea58) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002e40ea58) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff80002e40ea58,216,0) at vn_open+0x188 sys/kern/vfs_vnops.c:113 doopenat(ffff80002af0ba40,ffffff9c,20001640,615,0,ffff80002e40ec40) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff80002e40ecb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e40ecb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x97a1bfe4900, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002e40e6c0 rbx 0 rdx 0xffff800000b99900 rcx 0xffffffff rax 0xfffffd805c4f1020 r8 0xffffffffffffffff r9 0xfffffd807f7d80c0 r10 0x7a92cd31c091f36 r11 0xbeaebe830c167384 r12 0 r13 0 r14 0 r15 0xffff80001ef3f000 rip 0xffffffff817ddb9e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002e40e5c0 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb{0}> show proc PROC (syz-executor.1) pid=84703 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5500,0xffff80002af0b7b0 process=0xffff80002aefc440 user=0xffff80002e409000, vmspace=0xfffffd8076b29000 estcpu=33, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 350 302132 85074 0 7 0 syz-executor.0 350 20983 85074 0 2 0x4000080 syz-executor.0 30427 327844 80364 0 2 0 syz-executor.1 *30427 84703 80364 0 7 0x4000000 syz-executor.1 49230 459098 83592 0 2 0 syz-executor.3 49230 187258 83592 0 3 0x4000080 fsleep syz-executor.3 73133 338709 58698 0 2 0 syz-executor.2 73133 500045 58698 0 3 0x4000080 fsleep syz-executor.2 58698 45781 92891 0 2 0x2 syz-executor.2 24797 410426 92891 0 2 0x2 syz-executor.6 61907 65707 92891 0 2 0x2 syz-executor.5 41450 73048 92891 0 2 0x2 syz-executor.7 26850 90094 0 0 3 0x14280 nfsidl nfsio 12318 236908 0 0 3 0x14280 nfsidl nfsio 22052 55573 0 0 3 0x14280 nfsidl nfsio 61480 69812 0 0 3 0x14280 nfsidl nfsio 23429 294948 0 0 3 0x14280 nfsidl nfsio 68468 159873 0 0 3 0x14280 nfsidl nfsio 37832 202600 0 0 3 0x14280 nfsidl nfsio 95792 18825 0 0 3 0x14280 nfsidl nfsio 59615 319689 0 0 3 0x14280 nfsidl nfsio 3468 412002 0 0 3 0x14280 nfsidl nfsio 16747 122993 0 0 3 0x14280 nfsidl nfsio 91027 79113 0 0 3 0x14280 nfsidl nfsio 8702 5403 0 0 3 0x14280 nfsidl nfsio 31549 469914 0 0 3 0x14280 nfsidl nfsio 33787 407664 0 0 3 0x14280 nfsidl nfsio 68028 421217 0 0 3 0x14280 nfsidl nfsio 46923 502374 0 0 3 0x14280 nfsidl nfsio 20792 376343 0 0 3 0x14280 nfsidl nfsio 54722 204821 0 0 3 0x14280 nfsidl nfsio 71764 285169 0 0 3 0x14280 nfsidl nfsio 85074 423303 92891 0 3 0x82 nanoslp syz-executor.0 68985 498347 0 0 3 0x14200 bored sosplice 94526 15131 92891 0 2 0x482 syz-executor.4 83592 263404 92891 0 3 0x82 nanoslp syz-executor.3 80364 386770 92891 0 2 0x482 syz-executor.1 92891 519021 44761 0 3 0x82 thrsleep syz-fuzzer 92891 17462 44761 0 2 0x4000482 syz-fuzzer 92891 383826 44761 0 3 0x4000082 thrsleep syz-fuzzer 92891 236275 44761 0 2 0x4000482 syz-fuzzer 92891 429584 44761 0 3 0x4000082 thrsleep syz-fuzzer 92891 55575 44761 0 3 0x4000082 thrsleep syz-fuzzer 92891 129212 44761 0 3 0x4000082 kqread syz-fuzzer 92891 387073 44761 0 3 0x4000082 thrsleep syz-fuzzer 92891 348616 44761 0 3 0x4000082 thrsleep syz-fuzzer 44761 162513 32878 0 3 0x10008a sigsusp ksh 32878 171581 49698 0 3 0x9a kqread sshd 43350 125425 1 0 3 0x100083 ttyin getty 49698 367549 1 0 3 0x88 kqread sshd 46157 249997 63272 74 3 0x100092 bpf pflogd 63272 497388 1 0 3 0x80 netio pflogd 76850 460625 62827 73 3 0x100090 kqread syslogd 62827 410661 1 0 3 0x100082 netio syslogd 26485 225042 1 0 3 0x100080 kqread resolvd 47386 394445 30614 77 3 0x100092 kqread dhcpleased 75935 498271 30614 77 3 0x100092 kqread dhcpleased 30614 295354 1 0 3 0x80 kqread dhcpleased 19148 492486 0 0 3 0x14200 bored smr 750 313245 0 0 2 0x14200 zerothread 80534 113378 0 0 3 0x14200 aiodoned aiodoned 92698 486139 0 0 3 0x14200 syncer update 15660 223023 0 0 3 0x14200 cleaner cleaner 53676 487825 0 0 3 0x14200 reaper reaper 74339 379813 0 0 3 0x14200 pgdaemon pagedaemon 16655 62739 0 0 3 0x14200 bored viomb 94493 268124 0 0 3 0x40014200 acpi0 acpi0 610 456237 0 0 3 0x40014200 idle1 61598 137494 0 0 3 0x14200 bored softnet 25152 314212 0 0 3 0x14200 bored systqmp 43869 203011 0 0 3 0x14200 bored systq 1594 175380 0 0 2 0x40014200 softclock 38695 256098 0 0 3 0x40014200 idle0 1 47376 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 350 (syz-executor.0) thread 0xffff800022c6ed28 (302132) exclusive rwlock amaplk r = 0 (0xfffffd805d886600) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8076b298b8) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 30427 (syz-executor.1) thread 0xffff80002af0ba40 (84703) exclusive rrwlock inode r = 0 (0xfffffd8008778920) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 vn_open+0x188 sys/kern/vfs_vnops.c:113 #8 doopenat+0x26a sys/kern/vfs_syscalls.c:1128 #9 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82a3d4a8) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 Process 61907 (syz-executor.5) thread 0xffff8000211437a8 (65707) exclusive rrwlock inode r = 0 (0xfffffd806e641d60) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd805e2a53d0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 6501K 7814K 78643K 16320 0 pcb 13 14K 16K 78643K 400 0 rtable 219 9K 13K 78643K 1241 0 ifaddr 89 18K 19K 78643K 722 0 sysctl 2 0K 0K 78643K 4 0 counters 56 35K 36K 78643K 116 0 ioctlops 0 0K 4K 78643K 2298 0 iov 0 0K 28K 78643K 4402 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1425 89K 89K 78643K 3353 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 48 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 72 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 93K 78643K 4356 0 sigio 0 0K 0K 78643K 5 0 proc 71 87K 111K 78643K 1059 0 subproc 104 6K 6K 78643K 247 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 135 0 in_multi 85 5K 6K 78643K 305 0 ether_multi 1 0K 0K 78643K 19 0 mrt 0 0K 0K 78643K 30 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 1785 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 7 26K 26K 78643K 7 0 UVM amap 404 337K 339K 78643K 57102 0 UVM aobj 105 4K 4K 78643K 126 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 116 0 NDP 15 0K 2K 78643K 86 0 temp 141 4713K 4783K 78643K 91580 0 kqueue 12 18K 24K 78643K 177 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 120 461 0 458 10 9 1 3 0 8 0 rtentry 112 272 0 181 4 0 4 4 0 8 0 unpcb 136 2033 0 2018 22 21 1 6 0 8 0 syncache 296 10 0 10 3 3 0 1 0 8 0 tcpqe 32 101 0 101 1 1 0 1 0 8 0 tcpcb 736 1136 0 1132 47 46 1 11 0 8 0 arp 120 43 0 27 1 0 1 1 0 8 0 inpcb 304 3247 0 3240 61 55 6 14 0 8 5 rttmr 72 13 0 13 3 3 0 1 0 8 0 nd6 48 69 0 46 1 0 1 1 0 8 0 pkpcb 40 10 0 10 1 1 0 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1248 19 0 19 5 4 1 1 0 8 1 pfstscr 40 78 0 78 2 1 1 1 0 8 1 pffrag 232 14 0 14 1 1 0 1 0 482 0 pffrnode 88 14 0 14 1 1 0 1 0 8 0 pffrent 40 34 0 34 1 1 0 1 0 8 0 pfosfp 40 1466 0 1041 5 0 5 5 0 8 0 pfosfpen 112 1466 0 748 21 0 21 21 0 8 0 pfrktable 1344 150 0 145 1 0 1 1 0 8 0 pftag 88 7 0 0 1 0 1 1 0 8 0 pfstitem 24 46 0 44 1 0 1 1 0 8 0 pfstkey 112 128 0 126 1 0 1 1 0 8 0 pfstate 320 85 0 83 3 2 1 3 0 8 0 pfrule 1360 212 0 186 5 2 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1072 0 688 30 5 25 30 0 8 0 art_table 32 1073 0 688 4 0 4 4 0 8 0 art_node 16 271 0 192 1 0 1 1 0 8 0 sysvmsgpl 40 168 0 144 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 63 0 53 1 0 1 1 0 8 0 shmpl 112 123 0 21 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7830 0 6371 92 0 92 92 0 8 0 ffsino 272 7830 0 6371 98 0 98 98 0 8 0 nchpl 144 14062 0 12424 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 48317 0 48316 3 2 1 2 0 8 0 percpumem 16 70 0 30 1 0 1 1 0 8 0 vcpupl 2048 40 0 0 5 0 5 5 0 8 0 vmpool 560 45 0 5 3 0 3 3 0 8 0 pfiaddrpl 120 24 0 21 4 3 1 1 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 38544 0 38544 17 14 3 8 0 8 3 plimitpl 152 231 0 216 1 0 1 1 0 8 0 sigapl 424 4685 0 4623 10 2 8 8 0 8 0 futexpl 64 35377 0 35375 2 1 1 1 0 8 0 knotepl 120 172 0 0 5 0 5 5 0 8 0 kqueuepl 216 725 0 717 13 12 1 5 0 8 0 pipepl 336 979 0 951 27 24 3 13 0 8 0 fdescpl 496 4629 0 4602 6 2 4 5 0 8 0 filepl 152 28759 0 28517 56 43 13 19 0 8 3 lockfpl 104 5051 0 5049 9 7 2 3 0 8 1 lockfspl 48 1127 0 1125 1 0 1 1 0 8 0 sessionpl 144 35 0 18 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 96 3785 0 3770 1 0 1 1 0 8 0 zombiepl 144 4623 0 4622 2 1 1 1 0 8 0 processpl 1064 4685 0 4622 5 0 5 5 0 8 0 procpl 672 12344 0 12269 14 6 8 9 0 8 1 srpgc 96 8 0 8 3 2 1 1 0 8 1 sosppl 168 21 0 21 3 3 0 1 0 8 0 sockpl 480 5822 0 5797 146 134 12 28 0 8 8 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 19 0 0 3 1 2 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 208 0 0 23 0 23 23 0 8 0 mtagpl 96 402 0 0 9 0 9 9 0 8 0 mbufpl 256 667 0 0 37 0 37 37 0 8 0 bufpl 288 10983 0 4647 453 0 453 453 0 8 0 anonpl 24 1238342 0 1222189 168 42 126 145 0 186 0 amapchunkpl 152 133872 0 133024 50 12 38 41 0 158 1 amappl16 200 10471 0 9911 71 40 31 43 0 8 0 amappl15 192 350 0 346 1 0 1 1 0 8 0 amappl14 184 539 0 534 1 0 1 1 0 8 0 amappl13 176 733 0 732 1 0 1 1 0 8 0 amappl12 168 801 0 795 1 0 1 1 0 8 0 amappl11 160 562 0 547 1 0 1 1 0 8 0 amappl10 152 545 0 541 1 0 1 1 0 8 0 amappl9 144 730 0 724 1 0 1 1 0 8 0 amappl8 136 1622 0 1539 3 0 3 3 0 8 0 amappl7 128 901 0 885 1 0 1 1 0 8 0 amappl6 120 509 0 483 2 1 1 2 0 8 0 amappl5 112 3857 0 3841 1 0 1 1 0 8 0 amappl4 104 2133 0 2108 1 0 1 1 0 8 0 amappl3 96 1270 0 1255 1 0 1 1 0 8 0 amappl2 88 2780 0 2721 3 1 2 3 0 8 0 amappl1 80 85875 0 85319 22 8 14 19 0 8 1 amappl 88 55585 0 55312 9 1 8 8 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 72 125 0 21 2 0 2 2 0 8 0 uaddrrnd 24 4674 0 4607 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4674 0 4607 1 0 1 1 0 8 0 vmmpekpl 168 39287 0 39234 3 0 3 3 0 8 0 vmmpepl 168 426073 0 423537 195 60 135 149 0 357 10 vmsppl 368 4673 0 4607 8 1 7 7 0 8 0 rwobjpl 56 106673 0 99057 112 3 109 110 0 8 0 pdppl 4096 9355 0 9254 333 224 109 109 0 8 8 pvpl 32 2158589 0 2138181 304 100 204 248 0 265 3 pmappl 248 4673 0 4607 6 1 5 5 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1180 0 307 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806f30aa08,ffff80002e40ea88,ffff80002e40eab8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e40ea58) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002e40ea58) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff80002e40ea58,216,0) at vn_open+0x188 sys/kern/vfs_vnops.c:113 doopenat(ffff80002af0ba40,ffffff9c,20001640,615,0,ffff80002e40ec40) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff80002e40ecb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e40ecb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x97a1bfe4900, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:144 syscall(ffff80002af30890) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002af30890) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc73b0, count: 9 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:144 syscall(ffff80002af30890) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002af30890) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc73b0, count: -6