login: ¹j¼õ¬|ÿ ž¨E1\…:uvm_fault(0xfffffd800d90fb90, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff827885d8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff800033b8bb20 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff827885d8 Starting stack trace... panic(ffffffff834ed534) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800033b8ba70) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003a3b82b8,fffffd805f887a68,ffff800033b8bc50) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff80003a3b82b8,ffff800033b8bda0,ffff800033b8bcf0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff800033b8bda0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033b8bda0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa61791e11e0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 1595034272 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *296516 45437 0 0 0 1 syz-executor 22257 72616 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x77adec23e920, count: 14 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{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800d90fb90, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x77adec23e920, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003879d230 rbx 0 rdx 0 rcx 0xffff80003a3b87e8 rax 0x3b r8 0xffff80003879d160 r9 0x1 r10 0xd3334f83a5f32aca r11 0x839256c602335537 r12 0 r13 0 r14 0xffff80003a3b87e8 r15 0 rip 0xffffffff82a403ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003879d1b0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=296516 pid=45437 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c409780,0xffff80003a3b9258 process=0xffff80003c3d4e90 user=0xffff800038798000, vmspace=0xfffffd800d90fb90 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49714 61243 25297 -1 2 0x10 syz-executor 49714 105158 25297 -1 2 0x4000c90 syz-executor *45437 296516 47216 0 7 0 syz-executor 45437 154320 47216 0 3 0x4000000 sbar syz-executor 871 313529 24282 0 2 0xc80 syz-executor 871 340426 24282 0 3 0x4000080 ttyout syz-executor 871 467455 24282 0 3 0x4000080 fsleep syz-executor 99082 204174 48806 0 2 0xc80 syz-executor 99082 460993 48806 0 3 0x4000080 netacc syz-executor 68202 121644 88911 0 2 0xc80 syz-executor 68202 293698 88911 0 3 0x4000080 kqsel syz-executor 68202 42677 88911 0 3 0x4000080 fsleep syz-executor 19415 52731 60136 0 4 0x82000 syz-executor 19415 256261 60136 0 2 0x4082000 syz-executor 19415 36280 60136 0 3 0x4082000 inode syz-executor 19415 454165 60136 0 3 0x4002000 suspend syz-executor 87622 314378 0 0 3 0x14200 acct acct 8079 350178 1 0 2 0x100083 getty 72616 22257 22321 0 7 0x2 syz-executor 88911 507349 22321 0 2 0xc82 syz-executor 24282 126159 22321 0 2 0xc82 syz-executor 25297 202464 22321 0 2 0xc82 syz-executor 61757 348177 22321 0 2 0x2 syz-executor 48806 82288 22321 0 2 0xc82 syz-executor 60136 5351 22321 0 2 0xc82 syz-executor 47216 408657 22321 0 2 0xc82 syz-executor 22321 343144 12439 0 3 0x82 kqread syz-executor 12439 305229 27351 0 3 0x10008a sigsusp ksh 27351 66854 83067 0 3 0x98 kqread sshd-session 83067 324339 74413 0 3 0x92 kqread sshd-session 74413 443456 1 0 3 0x88 kqread sshd 8293 27652 27107 74 3 0x1100092 bpf pflogd 27107 239744 1 0 3 0x80 sbwait pflogd 77760 431702 94797 73 3 0x1100090 kqread syslogd 94797 448672 1 0 3 0x100082 sbwait syslogd 68079 86384 1 0 3 0x100080 kqread resolvd 37388 290833 25909 77 3 0x100092 kqread dhcpleased 2827 387053 25909 77 3 0x100092 kqread dhcpleased 25909 10537 1 0 3 0x80 kqread dhcpleased 86572 311469 0 0 2 0x40014200 smr 89585 484637 0 0 2 0x14200 zerothread 83047 164905 0 0 3 0x14200 aiodoned aiodoned 33744 41079 0 0 3 0x14200 syncer update 7274 415592 0 0 3 0x14200 cleaner cleaner 91201 316777 0 0 3 0x14200 reaper reaper 2008 59 0 0 3 0x14200 pgdaemon pagedaemon 2040 153275 0 0 3 0x14200 bored viomb 38872 341516 0 0 3 0x40014200 acpi0 acpi0 69375 313219 0 0 3 0x40014200 idle1 47706 402007 0 0 3 0x14200 bored softnet1 66387 29006 0 0 2 0x14200 softnet0 30908 364332 0 0 3 0x14200 smrbar systqmp 38062 458316 0 0 3 0x14200 bored systq 50595 424579 0 0 3 0x14200 tmoslp softclockmp 24418 457212 0 0 3 0x40014200 tmoslp softclock 39264 236373 0 0 3 0x40014200 idle0 1 107373 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 45437 (syz-executor) thread 0xffff80003a3b82b8 (154320) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3e580) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 19415 (syz-executor) thread 0xffff80003a3b8550 (256261) exclusive rrwlock inode r = 0 (0xfffffd806c87da00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vn_write+0x18f sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 72616 (syz-executor) thread 0xffff8000fffef240 (22257) exclusive rrwlock inode r = 0 (0xfffffd806db48d60) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c87dea0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 61757 (syz-executor) thread 0xffff80002a222a70 (348177) exclusive rrwlock inode r = 0 (0xfffffd806c40bd80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cb608d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 30908 (systqmp) thread 0xffff8000ffffe000 (364332) shared rwlock systqmp r = 0 (0xffffffff8395acd8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11054 12079K 12354K 166960K 12273 0 pcb 17 12K 12K 166960K 61 0 rtable 197 5K 7K 166960K 360 0 pf 36 18K 19K 166960K 59 0 ifaddr 38 6K 7K 166960K 46 0 ifgroup 51 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1529 0 iov 0 0K 16K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1291 81K 82K 166960K 1497 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 306 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 163K 166960K 591 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 21 0 in_multi 85 6K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 402 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 167K 178K 166960K 4567 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 41 82K 106K 166960K 1466 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 11 0K 2K 166960K 29 0 temp 39 9115K 9122K 166960K 9918 0 kqueue 14 22K 26K 166960K 44 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 176 115 0 25 6 0 6 6 0 8 0 unpcb 144 117 0 99 2 0 2 2 0 8 1 syncache 336 69 0 69 1 0 1 1 0 8 1 tcpcb 736 68 0 64 4 0 4 4 0 8 3 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 231 0 224 4 0 4 4 0 8 3 nd6 152 28 0 5 2 0 2 2 0 8 1 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 45 0 0 1 0 1 1 0 8 0 pfstkey 128 67 0 23 2 0 2 2 0 8 0 pfstate 448 53 0 11 5 0 5 5 0 8 0 pfrule 1360 28 0 22 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 468 0 53 30 0 30 30 0 8 2 art_table 40 469 0 53 5 0 5 5 0 8 0 art_node 32 115 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 72 5 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1861 0 393 93 0 93 93 0 8 0 ffsino 296 1861 0 393 114 0 114 114 0 8 0 nchpl 144 2310 0 604 64 0 64 64 0 8 0 vnodes 216 2038 0 0 114 0 114 114 0 8 0 namei 1024 7132 0 7131 2 0 2 2 0 8 1 percpumem 16 51 0 2 1 0 1 1 0 8 0 kstatmem 264 29 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8812 0 8812 3 2 1 2 1 8 1 plimitpl 152 47 0 27 1 0 1 1 0 8 0 sigapl 424 625 0 578 7 0 7 7 0 8 1 knotepl 120 545 0 0 17 0 17 17 0 8 0 kqueuepl 224 67 0 56 1 0 1 1 0 8 0 pipepl 344 133 0 105 3 0 3 3 0 8 0 fdescpl 528 608 0 578 3 0 3 3 0 8 0 filepl 160 2571 0 2350 11 0 11 11 0 8 1 lockfpl 104 96 0 92 1 0 1 1 0 8 0 lockfspl 48 45 0 41 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 263 0 249 1 0 1 1 0 8 0 zombiepl 144 578 0 578 1 0 1 1 0 8 1 processpl 1232 625 0 578 5 0 5 5 0 8 0 procpl 664 918 0 861 6 0 6 6 0 8 0 sockpl 752 392 0 364 7 0 7 7 0 8 3 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 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 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 208 0 0 13 0 13 13 0 8 0 bufpl 280 3262 0 105 226 0 226 226 0 8 0 anonpl 32 7506 0 0 61 0 61 61 0 246 0 amapchunkpl 152 13476 0 13014 26 0 26 26 0 158 5 amappl16 200 2344 0 2177 15 3 12 14 0 8 3 amappl15 192 36 0 36 1 1 0 1 0 8 0 amappl14 184 492 0 491 1 0 1 1 0 8 0 amappl13 176 126 0 113 1 0 1 1 0 8 0 amappl12 168 858 0 829 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 73 0 59 1 0 1 1 0 8 0 amappl9 144 274 0 273 2 1 1 1 0 8 0 amappl8 136 104 0 102 1 0 1 1 0 8 0 amappl7 128 153 0 138 1 0 1 1 0 8 0 amappl6 120 163 0 162 1 0 1 1 0 8 0 amappl5 112 96 0 86 1 0 1 1 0 8 0 amappl4 104 296 0 277 1 0 1 1 0 8 0 amappl3 96 2573 0 2464 4 0 4 4 0 8 0 amappl2 88 545 0 483 2 0 2 2 0 8 0 amappl1 80 11085 0 10480 16 0 16 16 0 8 2 amappl 88 3815 0 3658 5 0 5 5 0 92 0 uvmvnodes 80 108 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 128 254 0 254 2 1 1 1 0 8 1 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 608 0 578 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 608 0 578 1 0 1 1 0 8 0 vmmpekpl 168 6916 0 6877 2 0 2 2 0 8 0 vmmpepl 168 47736 0 45731 95 0 95 95 0 357 3 vmsppl 488 607 0 578 5 0 5 5 0 8 1 rwobjpl 80 16740 0 15561 27 0 27 27 0 8 2 pdppl 4096 1223 0 1156 95 24 71 83 0 8 4 pvpl 32 14352 0 0 116 0 116 116 0 265 0 pmappl 256 607 0 578 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 278 0 27 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83994ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff80002a37a2b0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83a3dd80,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 biowait(fffffd806ca1f360) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806ca1f360) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs_update(fffffd806c87de00,1) at ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 ufs_mkdir(ffff80002a37a710) at ufs_mkdir+0x3b3 sys/ufs/ufs/ufs_vnops.c:1143 VOP_MKDIR(fffffd806d04ac10,ffff80002a37a870,ffff80002a37a8a0,ffff80002a37a7a0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 end trace frame: 0xffff80002a37a940, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83994ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff80002a37a2b0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3dd80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83a3dd80,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 biowait(fffffd806ca1f360) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806ca1f360) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ffs_update(fffffd806c87de00,1) at ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 ufs_mkdir(ffff80002a37a710) at ufs_mkdir+0x3b3 sys/ufs/ufs/ufs_vnops.c:1143 VOP_MKDIR(fffffd806d04ac10,ffff80002a37a870,ffff80002a37a8a0,ffff80002a37a7a0) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff8000fffef240,ffffff9c,7c4f93951510,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80002a37aa20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a37aa20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c4f939515b0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x77adec23e920, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x77adec23e920, count: -1