panic: Caught invalid memory access at ffffffff84ecbaf4 size 4 op 0 Stopped at db_enter+0x17: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *241490 12602 0 0 0x4000000 0K syz-executor 24370 53518 0 0x2 0 1 syz-executor db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff8463738e) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load4_noabort(ffffffff84ecbaf4) at __asan_load4_noabort+0xa3 checkalias(ffff800000121538,7108) at checkalias+0x47d sys/kern/vfs_subr.c:603 ffs_vinit(ffff800000d80800,ffff800029998400) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 ffs_vget(ffff800000d80800,665c,ffff8000299985c0) 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(ffff800000121898,ffff800029998c30,ffff800029998c60) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 vfs_lookup(ffff800029998c00) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 namei(ffff800029998c00) at namei+0xe19 sys/kern/vfs_lookup.c:250 dofchmodat(ffff800045ffcfa8,ffffff9c,2000000000c0,19b,0) at dofchmodat+0x1d1 sys/kern/vfs_syscalls.c:2325 syscall(ffff800029998f20) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800029998f20) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdee0103d410, count: 2 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 ffffffff84ecbaf4 size 4 op 0 ddb{0}> show kasan KASAN: invalid read of 4 bytes at 0xffffffff84ecbaf4 from pc 0xffffffff83a6bddd KASAN: first bad byte at 0xffffffff84ecbaf4 (+0); shadow 0xfa: global redzone (out-of-bounds) KASAN: 0xffffffff84ecbaf4 is 948 bytes to the right of the 8160-byte global 'cdevsw' (/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 dofchmodat+0x1d1 sys/kern/vfs_syscalls.c:2325 #9 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 KASAN: shadow of 0xffffffff84ecb980..0xffffffff84ecbc00 (1 cell = 8 bytes): 0xffffffff84ecb980: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0xffffffff84ecba00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa >0xffffffff84ecba80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa[fa]fa 0xffffffff84ecbb00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0xffffffff84ecbb80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 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(ffffffff8463738e) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load4_noabort(ffffffff84ecbaf4) at __asan_load4_noabort+0xa3 checkalias(ffff800000121538,7108) at checkalias+0x47d sys/kern/vfs_subr.c:603 ffs_vinit(ffff800000d80800,ffff800029998400) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 ffs_vget(ffff800000d80800,665c,ffff8000299985c0) 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(ffff800000121898,ffff800029998c30,ffff800029998c60) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 vfs_lookup(ffff800029998c00) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 namei(ffff800029998c00) at namei+0xe19 sys/kern/vfs_lookup.c:250 dofchmodat(ffff800045ffcfa8,ffffff9c,2000000000c0,19b,0) at dofchmodat+0x1d1 sys/kern/vfs_syscalls.c:2325 syscall(ffff800029998f20) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800029998f20) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdee0103d410, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800029998090 rbx 0xffff800029998100 rdx 0 rcx 0xffffffff85221ff0 cpu_info_full_primary+0x1ff0 rax 0xffff80000016e980 r8 0x101010101010101 r9 0x8080808080808080 r10 0xffff800029997e78 r11 0xffffffff81b873f0 x86_bus_space_io_read_1 r12 0xffffffff8463738e .str.28+0x9d9ae r13 0xffffffff85222c08 cpu_info_full_primary+0x2c08 r14 0xffffffff85222e07 cpu_info_full_primary+0x2e07 r15 0x1 rip 0xffffffff820d6ab7 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff800029998090 ss 0x10 db_enter+0x17: popq %rbp ddb{0}> show proc PROC (syz-executor) tid=241490 pid=12602 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=77, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ffd4d8,0xffff800045ffc028 process=0xffff800045ffa1c8 user=0xffff80002998d000, vmspace=0xffff800001c4c7b8 estcpu=27, cpticks=20, pctcpu=0.0, user=0, sys=20, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 29012 76330 51315 0 2 0 0 syz-executor 29012 492218 51315 0 3 0 0x4000080 fsleep syz-executor 45444 134081 52721 0 2 0 0 syz-executor 45444 404285 52721 0 3 0 0x4000080 fsleep syz-executor 12602 43909 12624 0 2 0 0 syz-executor *12602 241490 12624 0 7 0 0x4000000 syz-executor 30349 408129 93556 0 2 0x10 0 syz-executor 30349 77833 93556 0 3 0x10 0x4000080 sbwait syz-executor 30349 414153 93556 0 2 0x10 0x4000000 syz-executor 70570 419860 67487 0 2 0 0xc80 syz-executor 70570 49955 67487 0 3 0 0x4000080 piperd syz-executor 70570 119852 67487 0 3 0 0x4000080 fsleep syz-executor 98238 403704 53518 0 2 0 0xc80 syz-executor 98238 379646 53518 0 3 0 0x4000080 kqsel syz-executor 98238 184591 53518 0 3 0 0x4000080 kqread syz-executor 98238 469416 53518 0 3 0 0x4000080 kqsel syz-executor 98238 352978 53518 0 3 0 0x4000080 fsleep syz-executor 46770 371525 1 0 3 0x2 0x80 nanoslp getty 70951 449454 61347 0 2 0 0xc80 syz-executor 70951 207914 61347 0 3 0 0x4000080 netcon syz-executor 70951 400713 61347 0 3 0 0x4000080 fsleep syz-executor 70951 477065 61347 0 3 0 0x4000080 fsleep syz-executor 67487 240087 34186 0 2 0x2 0xc80 syz-executor 53518 24370 34186 0 7 0x2 0 syz-executor 51315 142801 34186 0 2 0x2 0xc80 syz-executor 52721 1898 34186 0 2 0x2 0xc80 syz-executor 93556 107979 34186 0 2 0x2 0xc80 syz-executor 12624 256120 34186 0 2 0x2 0xc80 syz-executor 61347 319845 34186 0 2 0x2 0xc80 syz-executor 91878 423663 34186 0 3 0x2 0x80 wait syz-executor 34186 464266 1 0 3 0x2 0x80 kqread syz-executor 14769 11916 1 74 3 0x1100012 0x80 bpf pflogd 8491 192412 1 73 2 0x1100010 0x80 syslogd 84696 218712 0 0 3 0x14000 0x200 bored smr 66468 208872 0 0 2 0x14000 0x200 zerothread 62858 21688 0 0 3 0x14000 0x200 aiodoned aiodoned 62945 389491 0 0 3 0x14000 0x200 syncer update 53021 470202 0 0 3 0x14000 0x200 cleaner cleaner 38350 508439 0 0 3 0x14000 0x200 reaper reaper 10611 331977 0 0 3 0x14000 0x200 pgdaemon pagedaemon 16133 363995 0 0 3 0x14000 0x200 bored viomb 73691 143418 0 0 3 0x14000 0x40000200 acpi0 acpi0 76512 140683 0 0 3 0x14000 0x40000200 idle1 52806 456791 0 0 3 0x14000 0x200 bored softnet1 61493 471038 0 0 3 0x14000 0x200 bored softnet0 64298 302243 0 0 3 0x14000 0x200 bored systqmp 43442 349881 0 0 3 0x14000 0x200 bored systq 58032 385413 0 0 2 0x14000 0x200 softclockmp 85746 274257 0 0 3 0x14000 0x40000200 tmoslp softclock 59024 248185 0 0 3 0x14000 0x40000200 idle0 1 94885 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 12602 (syz-executor) thread 0xffff800045ffcfa8 (241490) exclusive rrwlock inode r = 0 (0xffff800001d29220) #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 dofchmodat+0x1d1 sys/kern/vfs_syscalls.c:2325 #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 exclusive rrwlock inode r = 0 (0xffff8000019d1b08) #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 dofchmodat+0x1d1 sys/kern/vfs_syscalls.c:2325 #8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff85d77a80) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11049 12235K 12541K 166960K 12413 0 pcb 18 24K 24K 166960K 27 0 rtable 239 12K 13K 166960K 353 0 pf 34 22K 22K 166960K 47 0 ifaddr 43 12K 12K 166960K 46 0 ifgroup 55 2K 2K 166960K 57 0 sysctl 3 1K 13K 166960K 10 0 counters 70 42K 43K 166960K 72 0 ioctlops 0 0K 4K 166960K 1498 0 iov 0 0K 12K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1297 83K 84K 166960K 1421 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 6K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 292K 166960K 11964 0 file desc 18 65K 89K 166960K 222 0 sigio 0 0K 0K 166960K 4 0 proc 20 46K 161K 166960K 562 0 subproc 72 9K 9K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 ip_moptions 0 0K 0K 166960K 4 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 61 425K 425K 166960K 61 0 exec 0 0K 2K 166960K 387 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 179 143K 249K 166960K 3776 0 UVM aobj 7 4K 4K 166960K 7 0 pinsyscall 1048 1725K 1744K 166960K 1382 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 29 0 temp 39 9162K 9182K 166960K 4134 0 kqueue 4 13K 48K 166960K 38 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 34 0 34 1 0 1 1 0 8 1 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 130 0 119 2 0 2 2 0 8 1 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 23 0 21 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 108 0 102 2 0 2 2 0 8 1 nd6 152 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 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 30 0 0 1 0 1 1 0 8 0 pfstkey 128 30 0 0 1 0 1 1 0 8 0 pfstate 448 30 0 0 4 0 4 4 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 454 0 0 29 0 29 29 0 8 0 art_table 40 455 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 semapl 72 7 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1703 0 232 93 0 93 93 0 8 0 ffsino 296 1703 0 232 114 0 114 114 0 8 0 nchpl 144 2016 0 310 64 0 64 64 0 8 0 vnodes 216 1830 0 0 102 0 102 102 0 8 0 namei 1024 6666 0 6665 1 0 1 1 0 8 0 percpumem 16 52 0 1 1 0 1 1 0 8 0 kstatmem 264 29 0 2 2 0 2 2 0 8 0 scxspl 216 7282 0 7282 4 3 1 3 1 8 1 plimitpl 152 35 0 23 1 0 1 1 0 8 0 sigapl 424 540 0 502 7 0 7 7 0 8 1 knotepl 120 75 0 0 3 0 3 3 0 8 0 kqueuepl 224 45 0 39 1 0 1 1 0 8 0 pipepl 344 173 0 145 6 0 6 6 0 8 3 fdescpl 528 524 0 502 3 0 3 3 0 8 0 filepl 160 2341 0 2151 12 0 12 12 0 8 1 lockfpl 104 54 0 54 1 0 1 1 0 8 1 lockfspl 48 19 0 19 1 0 1 1 0 8 1 sessionpl 144 28 0 24 1 0 1 1 0 8 0 pgrppl 48 36 0 24 1 0 1 1 0 8 0 ucredpl 104 195 0 187 1 0 1 1 0 8 0 zombiepl 144 503 0 502 1 0 1 1 0 8 0 processpl 1232 540 0 502 5 0 5 5 0 8 1 procpl 664 700 0 648 6 0 6 6 0 8 1 sockpl 752 275 0 258 5 0 5 5 0 8 2 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 11 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 151 0 0 10 0 10 10 0 8 0 bufpl 272 2458 0 109 157 0 157 157 0 8 0 anonpl 32 11543 0 0 93 0 93 93 0 222 0 amapchunkpl 152 11021 0 10554 30 0 30 30 0 158 9 amappl16 200 2062 0 2044 16 2 14 14 0 8 12 amappl15 192 5 0 5 2 1 1 1 0 8 1 amappl14 184 434 0 433 1 0 1 1 0 8 0 amappl13 176 125 0 122 1 0 1 1 0 8 0 amappl12 168 774 0 753 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 68 0 64 1 0 1 1 0 8 0 amappl9 144 277 0 277 1 1 0 1 0 8 0 amappl8 136 104 0 101 1 0 1 1 0 8 0 amappl7 128 158 0 153 1 0 1 1 0 8 0 amappl6 120 216 0 216 1 0 1 1 0 8 1 amappl5 112 101 0 97 1 0 1 1 0 8 0 amappl4 104 300 0 291 1 0 1 1 0 8 0 amappl3 96 2023 0 1922 4 0 4 4 0 8 1 amappl2 88 536 0 520 2 0 2 2 0 8 0 amappl1 80 10858 0 10672 14 0 14 14 0 8 3 amappl 88 3043 0 2888 4 0 4 4 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 524 0 502 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 524 0 502 1 0 1 1 0 8 0 vmmpekpl 168 6517 0 6481 2 0 2 2 0 8 0 vmmpepl 168 42913 0 41822 92 0 92 92 0 357 34 vmsppl 488 523 0 502 5 0 5 5 0 8 1 rwobjpl 80 15820 0 15266 27 0 27 27 0 8 5 pdppl 4096 1057 0 1004 95 22 73 85 0 8 20 pvpl 32 18980 0 0 154 0 154 154 0 265 0 pmappl 256 523 0 502 3 0 3 3 0 8 0 extentpl 40 47 0 29 1 0 1 1 0 8 0 phpool 120 424 0 27 13 0 13 13 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(ffffffff8463738e) at panic+0x270 sys/kern/subr_prf.c:198 __asan_load4_noabort(ffffffff84ecbaf4) at __asan_load4_noabort+0xa3 checkalias(ffff800000121538,7108) at checkalias+0x47d sys/kern/vfs_subr.c:603 ffs_vinit(ffff800000d80800,ffff800029998400) at ffs_vinit+0x227 sys/ufs/ffs/ffs_subr.c:235 ffs_vget(ffff800000d80800,665c,ffff8000299985c0) 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(ffff800000121898,ffff800029998c30,ffff800029998c60) at VOP_LOOKUP+0xda sys/kern/vfs_vops.c:85 vfs_lookup(ffff800029998c00) at vfs_lookup+0xfbd sys/kern/vfs_lookup.c:580 namei(ffff800029998c00) at namei+0xe19 sys/kern/vfs_lookup.c:250 dofchmodat(ffff800045ffcfa8,ffffff9c,2000000000c0,19b,0) at dofchmodat+0x1d1 sys/kern/vfs_syscalls.c:2325 syscall(ffff800029998f20) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800029998f20) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdee0103d410, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x19: leave x86_ipi_db(ffff800028fe3ff0) 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 __asan_load4_noabort(ffffffff85d77280) at __asan_load4_noabort+0x5 sys/kern/subr_kasan.c:1098 syscall(ffff800029aa4350) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff800029aa4350) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7803341a3540, count: 9 ddb{1}> trace x86_ipi_db(ffff800028fe3ff0) 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 __asan_load4_noabort(ffffffff85d77280) at __asan_load4_noabort+0x5 sys/kern/subr_kasan.c:1098 syscall(ffff800029aa4350) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff800029aa4350) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7803341a3540, count: -6 ddb{1}>