login: panic: ufs_rename: lost dir entry Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 219646 1613 0 0 0 1 syz-executor.0 *262076 6658 0 0x1000 0x4080000 0K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8245df3b) at panic+0x177 sys/kern/subr_prf.c:202 ufs_rename(ffff800027afcbf8) at ufs_rename+0x15b1 sys/ufs/ufs/ufs_vnops.c:921 VOP_RENAME(fffffd807ea6bbe8,fffffd8067ee48c8,ffff800027afcdc8,fffffd807ea6bbe8,0,ffff800027afcd18) at VOP_RENAME+0xf0 sys/kern/vfs_vops.c:386 dorenameat(ffff800021242d28,ffffff9c,200000c0,ffffff9c,20000100) at dorenameat+0x29c sys/kern/vfs_syscalls.c:3021 syscall(ffff800027afcf60) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027afcf60) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaaba99cdf60, count: 8 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: ufs_rename: lost dir entry ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8245df3b) at panic+0x177 sys/kern/subr_prf.c:202 ufs_rename(ffff800027afcbf8) at ufs_rename+0x15b1 sys/ufs/ufs/ufs_vnops.c:921 VOP_RENAME(fffffd807ea6bbe8,fffffd8067ee48c8,ffff800027afcdc8,fffffd807ea6bbe8,0,ffff800027afcd18) at VOP_RENAME+0xf0 sys/kern/vfs_vops.c:386 dorenameat(ffff800021242d28,ffffff9c,200000c0,ffffff9c,20000100) at dorenameat+0x29c sys/kern/vfs_syscalls.c:3021 syscall(ffff800027afcf60) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027afcf60) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaaba99cdf60, count: -7 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800027afc980 rbx 0xffffffff827f4bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff800021242d28 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfa9ebd5ae1898e3b r11 0xeb5aa643f3ab5707 r12 0xffffffff827f4a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81410c88 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800027afc970 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=262076 stat=onproc flags process=1000 proc=4080000 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021243268,0xffff8000fffeed30 process=0xffff8000ffff0018 user=0xffff800027af8000, vmspace=0xfffffd8008586450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1613 219646 42002 0 7 0 syz-executor.0 90174 266385 85082 0 2 0 syz-executor.3 * 6658 262076 51903 0 7 0x4081000 syz-executor.1 6658 313010 51903 0 3 0x4003000 suspend syz-executor.1 54677 139394 3494 0 3 0x80 nanoslp syz-executor.2 54677 146700 3494 0 3 0x4000080 fsleep syz-executor.2 54677 483555 3494 0 3 0x4000080 fsleep syz-executor.2 42002 444531 42824 0 3 0x82 nanoslp syz-executor.0 84727 13721 1 0 3 0x100083 ttyin getty 85082 293299 42824 0 3 0x82 nanoslp syz-executor.3 51903 11131 42824 0 3 0x82 nanoslp syz-executor.1 20556 297172 0 0 3 0x14280 nfsidl nfsio 61169 505680 0 0 3 0x14280 nfsidl nfsio 29193 267062 0 0 3 0x14280 nfsidl nfsio 61015 258826 0 0 3 0x14280 nfsidl nfsio 46988 487252 0 0 3 0x14280 nfsidl nfsio 87612 381718 0 0 3 0x14280 nfsidl nfsio 30257 55549 0 0 3 0x14280 nfsidl nfsio 37956 475369 0 0 3 0x14280 nfsidl nfsio 73155 497221 0 0 3 0x14280 nfsidl nfsio 6744 10823 0 0 3 0x14280 nfsidl nfsio 83206 337082 0 0 3 0x14280 nfsidl nfsio 9726 59323 0 0 3 0x14280 nfsidl nfsio 22002 433171 0 0 3 0x14280 nfsidl nfsio 21027 79557 0 0 3 0x14280 nfsidl nfsio 62671 58867 0 0 3 0x14280 nfsidl nfsio 88341 230538 0 0 3 0x14280 nfsidl nfsio 77555 505637 0 0 3 0x14280 nfsidl nfsio 6018 442723 0 0 3 0x14280 nfsidl nfsio 82156 422673 0 0 3 0x14280 nfsidl nfsio 27091 173327 0 0 3 0x14280 nfsidl nfsio 86049 270842 0 0 3 0x14200 bored sosplice 3494 371726 42824 0 3 0x82 nanoslp syz-executor.2 42824 129466 41778 0 3 0x82 thrsleep syz-fuzzer 42824 113965 41778 0 3 0x4000082 nanoslp syz-fuzzer 42824 385469 41778 0 3 0x4000082 kqread syz-fuzzer 42824 90036 41778 0 3 0x4000082 thrsleep syz-fuzzer 42824 344560 41778 0 3 0x4000082 nanoslp syz-fuzzer 42824 386645 41778 0 3 0x4000082 thrsleep syz-fuzzer 42824 98500 41778 0 3 0x4000082 thrsleep syz-fuzzer 42824 302927 41778 0 3 0x4000082 thrsleep syz-fuzzer 41778 483961 11987 0 3 0x10008a sigsusp ksh 11987 68163 84347 0 3 0x9a poll sshd 84347 288807 1 0 3 0x88 poll sshd 4427 289046 56906 74 3 0x100092 bpf pflogd 56906 69653 1 0 3 0x80 netio pflogd 75326 50328 50034 73 3 0x100090 kqread syslogd 50034 440467 1 0 3 0x100082 netio syslogd 85984 103098 1 0 3 0x100080 kqread resolvd 43992 322316 45462 77 3 0x100092 kqread dhcpleased 57161 233432 45462 77 3 0x100092 kqread dhcpleased 45462 519273 1 0 3 0x80 kqread dhcpleased 13295 326544 0 0 3 0x14200 bored smr 27824 207100 0 0 2 0x14200 zerothread 71886 222855 0 0 3 0x14200 aiodoned aiodoned 35648 516332 0 0 3 0x14200 syncer update 92679 396174 0 0 3 0x14200 cleaner cleaner 34985 949 0 0 3 0x14200 reaper reaper 93800 465207 0 0 3 0x14200 pgdaemon pagedaemon 96867 372452 0 0 3 0x14200 bored viomb 66586 187208 0 0 3 0x40014200 acpi0 acpi0 98953 72876 0 0 3 0x40014200 idle1 2837 275113 0 0 3 0x14200 bored softnet 3468 281336 0 0 3 0x14200 bored systqmp 90742 237885 0 0 3 0x14200 bored systq 30882 199062 0 0 3 0x40014200 bored softclock 72620 336776 0 0 3 0x40014200 idle0 1 11387 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 1613 (syz-executor.0) thread 0xffff8000fffeefc0 (219646) exclusive rwlock amaplk r = 0 (0xfffffd806d6f3a58) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:776 #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 (0xfffffd8067ea58d0) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1746 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676 #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 6658 (syz-executor.1) thread 0xffff800021242d28 (262076) exclusive rrwlock inode r = 0 (0xfffffd8078e482c8) #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_relookup+0xb0 sys/kern/vfs_lookup.c:782 #11 ufs_rename+0x13c4 sys/ufs/ufs/ufs_vnops.c:1055 #12 VOP_RENAME+0xf0 sys/kern/vfs_vops.c:386 #13 dorenameat+0x29c sys/kern/vfs_syscalls.c:3021 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82993908) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 tsleep+0x12c sys/kern/kern_synch.c:158 #5 biowait+0x91 sys/kern/vfs_bio.c:1271 #6 ffs_bufatoff+0x125 sys/ufs/ffs/ffs_subr.c:71 #7 ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:258 #8 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #9 vfs_relookup+0xb0 sys/kern/vfs_lookup.c:782 #10 ufs_rename+0x13c4 sys/ufs/ufs/ufs_vnops.c:1055 #11 VOP_RENAME+0xf0 sys/kern/vfs_vops.c:386 #12 dorenameat+0x29c sys/kern/vfs_syscalls.c:3021 #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 (0xfffffd8078e48e78) #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_relookup+0x53 sys/kern/vfs_lookup.c:773 #6 ufs_rename+0x13c4 sys/ufs/ufs/ufs_vnops.c:1055 #7 VOP_RENAME+0xf0 sys/kern/vfs_vops.c:386 #8 dorenameat+0x29c sys/kern/vfs_syscalls.c:3021 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10183 6683K 7127K 78643K 23244 0 pcb 13 14K 16K 78643K 453 0 rtable 155 7K 10K 78643K 1591 0 ifaddr 61 15K 17K 78643K 662 0 sysctl 2 0K 0K 78643K 2 0 counters 48 34K 35K 78643K 164 0 ioctlops 0 0K 4K 78643K 2053 0 iov 0 0K 32K 78643K 178 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1373 86K 86K 78643K 4246 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 41 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 662 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 49K 78643K 3618 0 sigio 0 0K 0K 78643K 81 0 proc 70 87K 111K 78643K 792 0 subproc 52 3K 3K 78643K 177 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 125 0 in_multi 55 3K 3K 78643K 248 0 ether_multi 1 0K 0K 78643K 44 0 mrt 1 0K 0K 78643K 18 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 2K 78643K 970 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 341 284K 284K 78643K 48023 0 UVM aobj 131 8K 8K 78643K 146 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 205 0 NDP 8 0K 1K 78643K 94 0 temp 100 4205K 4317K 78643K 40346 0 kqueue 10 14K 22K 78643K 135 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 120 209 0 206 3 2 1 3 0 8 0 rtentry 112 201 0 138 3 1 2 3 0 8 0 unpcb 136 1175 0 1160 7 6 1 5 0 8 0 syncache 296 17 0 17 6 6 0 1 0 8 0 tcpqe 32 119 0 119 6 6 0 1 0 8 0 tcpcb 736 1332 0 1328 55 47 8 20 0 8 7 arp 120 28 0 18 1 0 1 1 0 8 0 inpcb 304 3253 0 3246 46 39 7 11 0 8 6 rttmr 72 6 0 6 2 2 0 1 0 8 0 ip6q 72 4 0 4 1 1 0 1 0 8 0 ip6af 40 12 0 12 1 1 0 1 0 8 0 nd6 48 47 0 33 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 2 0 1 0 8 0 kcovpl 48 13 0 9 1 0 1 1 0 8 0 ppxss 1248 15 0 15 3 3 0 1 0 8 0 pfstscr 40 11 0 11 3 2 1 1 0 8 1 pffrag 232 9 0 9 2 2 0 1 0 482 0 pffrnode 88 9 0 9 2 2 0 1 0 8 0 pffrent 40 275 0 275 2 2 0 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 pfrktable 1344 431 0 427 4 3 1 1 0 8 0 pftag 88 11 0 10 2 1 1 1 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 95 0 93 1 0 1 1 0 8 0 pfstkey 112 107 0 105 1 0 1 1 0 8 0 pfstate 320 99 0 97 6 5 1 6 0 8 0 pfrule 1360 370 0 357 9 7 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 959 0 678 22 4 18 19 0 8 0 art_table 32 960 0 678 3 0 3 3 0 8 0 art_node 16 200 0 146 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 653 0 643 1 0 1 1 0 8 0 shmpl 112 143 0 15 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6167 0 4742 90 0 90 90 0 8 0 ffsino 272 6167 0 4742 96 0 96 96 0 8 0 nchpl 144 11378 0 9778 61 0 61 61 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 37198 0 37196 2 1 1 1 0 8 0 percpumem 16 94 0 58 1 0 1 1 0 8 0 vcpupl 2048 17 0 0 3 0 3 3 0 8 0 vmpool 560 17 0 0 2 0 2 2 0 8 0 pfiaddrpl 120 122 0 120 3 2 1 1 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 32977 0 32977 15 14 1 8 0 8 1 plimitpl 152 290 0 279 1 0 1 1 0 8 0 sigapl 424 3951 0 3893 15 6 9 15 0 8 0 futexpl 64 33931 0 33929 1 0 1 1 0 8 0 knotepl 112 124 0 0 3 0 3 3 0 8 0 kqueuepl 216 604 0 598 17 14 3 5 0 8 2 pipepl 336 817 0 801 26 24 2 7 0 8 0 fdescpl 496 3816 0 3793 4 1 3 4 0 8 0 filepl 152 23538 0 23385 46 33 13 14 0 8 6 lockfpl 104 1031 0 1029 4 3 1 2 0 8 0 lockfspl 48 258 0 256 1 0 1 1 0 8 0 sessionpl 144 30 0 17 1 0 1 1 0 8 0 pgrppl 48 33 0 20 1 0 1 1 0 8 0 ucredpl 96 2033 0 2021 1 0 1 1 0 8 0 zombiepl 144 5374 0 5373 2 1 1 1 0 8 0 processpl 1064 3951 0 3893 9 4 5 9 0 8 0 procpl 672 10976 0 10907 13 6 7 12 0 8 0 srpgc 96 12 0 12 4 4 0 1 0 8 0 sosppl 168 20 0 20 5 5 0 1 0 8 0 sockpl 480 4649 0 4624 80 69 11 29 0 8 7 mcl64k 65536 33 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 271 0 0 27 0 27 27 0 8 0 mtagpl 96 772 0 0 19 0 19 19 0 8 0 mbufpl 256 1750 0 0 108 0 108 108 0 8 0 bufpl 288 9471 0 3127 454 0 454 454 0 8 0 anonpl 24 1075449 0 1056514 149 30 119 138 0 186 2 amapchunkpl 152 120048 0 119269 71 39 32 44 0 158 0 amappl16 200 9604 0 9009 59 26 33 43 0 8 1 amappl15 192 296 0 295 3 2 1 1 0 8 0 amappl14 184 7 0 4 1 0 1 1 0 8 0 amappl13 176 514 0 511 1 0 1 1 0 8 0 amappl12 168 483 0 479 1 0 1 1 0 8 0 amappl11 160 59 0 44 1 0 1 1 0 8 0 amappl10 152 1270 0 1261 1 0 1 1 0 8 0 amappl9 144 1351 0 1345 1 0 1 1 0 8 0 amappl8 136 783 0 721 3 0 3 3 0 8 0 amappl7 128 315 0 305 1 0 1 1 0 8 0 amappl6 120 1079 0 1062 1 0 1 1 0 8 0 amappl5 112 4667 0 4644 1 0 1 1 0 8 0 amappl4 104 884 0 856 1 0 1 1 0 8 0 amappl3 96 838 0 822 1 0 1 1 0 8 0 amappl2 88 1269 0 1229 2 1 1 2 0 8 0 amappl1 80 72490 0 71975 13 2 11 13 0 8 0 amappl 88 47417 0 47191 6 0 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 72 145 0 15 3 0 3 3 0 8 0 uaddrrnd 24 3833 0 3793 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3833 0 3793 1 0 1 1 0 8 0 vmmpekpl 168 34741 0 34679 4 0 4 4 0 8 0 vmmpepl 168 352854 0 350635 210 98 112 117 0 357 12 vmsppl 368 3832 0 3793 4 0 4 4 0 8 0 rwobjpl 56 92991 0 85449 109 2 107 107 0 8 0 pdppl 4096 7674 0 7603 95 24 71 71 0 8 0 pvpl 32 1817617 0 1794747 237 46 191 219 0 265 3 pmappl 248 3832 0 3793 3 0 3 3 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1011 0 110 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8245df3b) at panic+0x177 sys/kern/subr_prf.c:202 ufs_rename(ffff800027afcbf8) at ufs_rename+0x15b1 sys/ufs/ufs/ufs_vnops.c:921 VOP_RENAME(fffffd807ea6bbe8,fffffd8067ee48c8,ffff800027afcdc8,fffffd807ea6bbe8,0,ffff800027afcd18) at VOP_RENAME+0xf0 sys/kern/vfs_vops.c:386 dorenameat(ffff800021242d28,ffffff9c,200000c0,ffffff9c,20000100) at dorenameat+0x29c sys/kern/vfs_syscalls.c:3021 syscall(ffff800027afcf60) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027afcf60) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaaba99cdf60, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) 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:139 uvm_fault(fffffd8067ea58b8,aaa1f003000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002125e490,aaa1f0031d2) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002125e490) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe8d20, count: 7 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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:139 uvm_fault(fffffd8067ea58b8,aaa1f003000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002125e490,aaa1f0031d2) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002125e490) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe8d20, count: -8