uvm_fault(0xfffffd806cd1b208, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff823e5038 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80002a254450 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff823e5038 Starting stack trace... panic(ffffffff834e8bb4) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a2543a0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fefa08,fffffd806f1f17a0,ffff80002a254560) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045fefa08,ffff80002a2546b0,ffff80002a254600) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80002a2546b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2546b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9c1676ed680, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 3 249 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 428380 64579 0 0x2 0 0 syz-executor * 26432 24493 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x74a6842b6db0, 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(0xfffffd806cd1b208, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x74a6842b6db0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2c68e0 rbx 0 rdx 0 rcx 0xffff80002a222010 rax 0x33 r8 0xffff80002a2c6810 r9 0x1 r10 0x21dbbc8378761dad r11 0xb863423ce8b48cda r12 0 r13 0 r14 0xffff80002a222010 r15 0 rip 0xffffffff8225b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a2c6860 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=26432 pid=24493 tcnt=1 stat=onproc flags process=2 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ffcd00,0xffff80002a2222b8 process=0xffff800045ff3500 user=0xffff80002a2c1000, vmspace=0xfffffd800b1cb000 estcpu=36, cpticks=15, pctcpu=0.3, user=0, sys=15, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 27281 94676 34979 0 2 0 0 syz-executor 27281 258596 34979 0 3 0 0x4000000 sbar syz-executor 92184 353836 71663 0 2 0 0 syz-executor 92184 65571 71663 0 3 0 0x4000080 fsleep syz-executor 51794 516039 50615 0 2 0 0 syz-executor 51794 60620 50615 0 3 0 0x4000080 fsleep syz-executor 6275 386242 59514 0 2 0x2 0 syz-executor 76011 409082 41884 0 2 0 0xc80 syz-executor 76011 158021 41884 0 2 0 0x4000000 syz-executor 76011 409564 41884 0 3 0 0x4000080 fsleep syz-executor 71979 203551 1 0 2 0x100003 0x80 getty 1949 494169 0 0 3 0x14000 0x280 nfsidl nfsio 34435 176393 0 0 3 0x14000 0x280 nfsidl nfsio 55803 67683 0 0 3 0x14000 0x280 nfsidl nfsio 21290 234480 0 0 3 0x14000 0x280 nfsidl nfsio 34350 84535 0 0 3 0x14000 0x280 nfsidl nfsio 9591 368006 0 0 3 0x14000 0x280 nfsidl nfsio 54120 431967 0 0 3 0x14000 0x280 nfsidl nfsio 88779 12142 0 0 3 0x14000 0x280 nfsidl nfsio 25373 76659 0 0 3 0x14000 0x280 nfsidl nfsio 69251 487926 0 0 3 0x14000 0x280 nfsidl nfsio 34812 130021 0 0 3 0x14000 0x280 nfsidl nfsio 42897 209338 0 0 3 0x14000 0x280 nfsidl nfsio 88216 360446 0 0 3 0x14000 0x280 nfsidl nfsio 54183 164270 0 0 3 0x14000 0x280 nfsidl nfsio 96444 236840 0 0 3 0x14000 0x280 nfsidl nfsio 45075 62720 0 0 3 0x14000 0x280 nfsidl nfsio 18069 309074 0 0 3 0x14000 0x280 nfsidl nfsio 9494 270206 0 0 3 0x14000 0x280 nfsidl nfsio 75139 152809 0 0 3 0x14000 0x280 nfsidl nfsio 422 500812 0 0 3 0x14000 0x280 nfsidl nfsio 83882 454600 0 0 3 0x14000 0x200 acct acct 71663 129331 59514 0 2 0x2 0xc80 syz-executor 64579 428380 59514 0 7 0x2 0 syz-executor 34979 421841 59514 0 2 0x2 0xc80 syz-executor 41884 453153 59514 0 2 0x2 0xc80 syz-executor 39148 207455 59514 0 2 0x2 0 syz-executor *24493 26432 59514 0 7 0x2 0 syz-executor 50615 40312 59514 0 2 0x2 0xc80 syz-executor 59514 505067 1 0 3 0x2 0x80 kqread syz-executor 6540 426522 41429 74 3 0x1100012 0x80 bpf pflogd 41429 144625 1 0 3 0 0x80 sbwait pflogd 90770 32784 1 73 3 0x1100010 0x80 kqread syslogd 16414 17719 0 0 2 0x14000 0x200 smr 56163 328804 0 0 2 0x14000 0x200 zerothread 58160 281988 0 0 3 0x14000 0x200 aiodoned aiodoned 18868 314417 0 0 3 0x14000 0x200 syncer update 23762 214998 0 0 3 0x14000 0x200 cleaner cleaner 17671 284985 0 0 3 0x14000 0x200 reaper reaper 20233 69193 0 0 3 0x14000 0x200 pgdaemon pagedaemon 98328 381664 0 0 3 0x14000 0x200 bored viomb 545 161197 0 0 3 0x14000 0x40000200 acpi0 acpi0 98494 318554 0 0 3 0x14000 0x40000200 idle1 33509 36295 0 0 3 0x14000 0x200 bored softnet1 48884 161292 0 0 2 0x14000 0x200 softnet0 40788 42962 0 0 2 0x14000 0x200 systqmp 16935 244746 0 0 3 0x14000 0x200 bored systq 17860 6628 0 0 3 0x14000 0x200 netlock softclockmp 12312 400011 0 0 3 0x14000 0x40000200 tmoslp softclock 67967 217705 0 0 3 0x14000 0x40000200 idle0 1 188681 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 27281 (syz-executor) thread 0xffff800045fefa08 (258596) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83adda40) #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 64579 (syz-executor) thread 0xffff800045fef240 (428380) exclusive rrwlock inode r = 0 (0xfffffd806d0ba8d8) #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:150 #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:3063 #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 (0xfffffd806d8878d0) #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:3048 #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 39148 (syz-executor) thread 0xffff80002a2222a8 (207455) exclusive rrwlock inode r = 0 (0xfffffd806d0ba688) #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:150 #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:3063 #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 (0xfffffd806d887c48) #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:3048 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11053 12084K 12289K 166960K 12318 0 pcb 18 12K 28K 166960K 122 0 rtable 208 6K 9K 166960K 424 0 pf 37 18K 24K 166960K 106 0 ifaddr 36 6K 8K 166960K 54 0 ifgroup 49 2K 2K 166960K 76 0 sysctl 3 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 84 0 ioctlops 0 0K 8K 166960K 1638 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1356 85K 86K 166960K 1720 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 10 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 14 49K 93K 166960K 404 0 sigio 0 0K 0K 166960K 4 0 proc 32 50K 180K 166960K 589 0 subproc 70 4K 4K 166960K 170 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 44 0 in_multi 77 5K 6K 166960K 106 0 ether_multi 1 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 16 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 429 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 135 99K 176K 166960K 5290 0 UVM aobj 10 2K 2K 166960K 11 0 pinsyscall 22 44K 105K 166960K 1594 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 11 0K 2K 166960K 33 0 temp 39 9118K 9126K 166960K 15761 0 kqueue 3 4K 28K 166960K 73 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 65 0 65 1 0 1 1 0 8 1 rtentry 176 117 0 26 6 0 6 6 0 8 0 unpcb 144 155 0 146 2 0 2 2 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 165 0 164 7 1 6 7 0 8 5 arp 136 18 0 4 1 0 1 1 0 8 0 inpcb 328 423 0 420 7 1 6 7 0 8 4 nd6 152 28 0 7 2 0 2 2 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 18 0 11 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pfstscr 40 6 0 2 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 3 0 1 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 pfrktable 1344 12 0 12 2 1 1 1 0 8 1 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfstlim 224 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 8 0 3 2 1 1 1 0 8 0 pftag 88 3 0 2 2 1 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 45 0 1 1 0 1 1 0 8 0 pfstkey 128 47 0 4 2 0 2 2 0 8 0 pfstate 448 44 0 2 5 0 5 5 0 8 0 pfrule 1360 27 0 22 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 495 0 111 31 0 31 31 0 8 1 art_table 40 496 0 111 5 0 5 5 0 8 0 art_node 32 117 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 72 9 0 1 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2002 0 530 93 0 93 93 0 8 0 ffsino 296 2002 0 530 114 0 114 114 0 8 0 nchpl 144 2524 0 812 64 0 64 64 0 8 0 vnodes 216 2374 0 0 132 0 132 132 0 8 0 namei 1024 8307 0 8305 3 2 1 2 0 8 0 percpumem 16 58 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 3 0 3 2 1 1 1 0 8 1 kstatmem 264 37 0 12 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 8129 0 8129 4 3 1 3 1 8 1 plimitpl 152 66 0 53 1 0 1 1 0 8 0 sigapl 424 730 0 674 9 1 8 8 0 8 0 knotepl 120 345 0 0 11 0 11 11 0 8 0 kqueuepl 224 85 0 83 2 1 1 2 0 8 0 pipepl 344 206 0 179 6 0 6 6 0 8 3 fdescpl 528 693 0 674 3 0 3 3 0 8 0 filepl 160 3653 0 3470 12 0 12 12 0 8 1 lockfpl 104 106 0 104 1 0 1 1 0 8 0 lockfspl 48 44 0 42 1 0 1 1 0 8 0 sessionpl 144 39 0 34 1 0 1 1 0 8 0 pgrppl 48 63 0 50 1 0 1 1 0 8 0 ucredpl 104 315 0 307 1 0 1 1 0 8 0 zombiepl 144 674 0 674 2 1 1 1 0 8 1 processpl 1232 730 0 674 6 0 6 6 0 8 0 procpl 664 1105 0 1044 7 0 7 7 0 8 0 sosppl 176 3 0 3 1 1 0 1 0 8 0 sockpl 752 719 0 707 10 1 9 10 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 148 0 0 10 0 10 10 0 8 0 bufpl 272 2711 0 106 174 0 174 174 0 8 0 anonpl 32 5433 0 0 44 0 44 44 0 247 0 amapchunkpl 152 15815 0 15514 27 3 24 26 0 158 9 amappl16 200 2095 0 2075 6 4 2 5 0 8 0 amappl15 192 18 0 18 1 1 0 1 0 8 0 amappl14 184 437 0 437 1 0 1 1 0 8 1 amappl13 176 125 0 121 1 0 1 1 0 8 0 amappl12 168 981 0 963 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 66 0 60 1 0 1 1 0 8 0 amappl9 144 281 0 281 1 1 0 1 0 8 0 amappl8 136 106 0 104 1 0 1 1 0 8 0 amappl7 128 154 0 147 1 0 1 1 0 8 0 amappl6 120 159 0 159 1 0 1 1 0 8 1 amappl5 112 101 0 95 1 0 1 1 0 8 0 amappl4 104 300 0 288 1 0 1 1 0 8 0 amappl3 96 3226 0 3159 4 0 4 4 0 8 1 amappl2 88 560 0 537 2 0 2 2 0 8 0 amappl1 80 11604 0 11411 15 2 13 15 0 8 2 amappl 88 4496 0 4393 5 0 5 5 0 92 0 uvmvnodes 80 105 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 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 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 693 0 674 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 693 0 674 1 0 1 1 0 8 0 vmmpekpl 168 8007 0 7962 3 0 3 3 0 8 0 vmmpepl 168 52812 0 51899 88 1 87 87 0 357 24 vmsppl 488 692 0 674 5 1 4 5 0 8 0 rwobjpl 80 17689 0 17151 23 0 23 23 0 8 1 pdppl 4096 1393 0 1348 103 52 51 85 0 8 6 pvpl 32 12488 0 0 102 1 101 101 0 265 0 pmappl 256 692 0 674 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 461 0 59 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83956ff0) 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+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83add240) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83add240) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83add240,1) 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(fffffd806fd0a450) at biowait+0xc6 sys/kern/vfs_bio.c:1110 bwrite(fffffd806fd0a450) at bwrite+0x359 sys/kern/vfs_bio.c:625 VOP_BWRITE(fffffd806fd0a450) at VOP_BWRITE+0x60 sys/kern/vfs_vops.c:648 ufs_mkdir(ffff80002a35c9f0) at ufs_mkdir+0x547 sys/ufs/ufs/ufs_vnops.c:1160 VOP_MKDIR(fffffd806db3b628,ffff80002a35cb50,ffff80002a35cb80,ffff80002a35ca80) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800045fef240,ffffff9c,7eb1cdd67c60,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 syscall(ffff80002a35cd00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35cd00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 end trace frame: 0xffff80002a35cd80, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83956ff0) 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+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83add240) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83add240) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83add240,1) 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(fffffd806fd0a450) at biowait+0xc6 sys/kern/vfs_bio.c:1110 bwrite(fffffd806fd0a450) at bwrite+0x359 sys/kern/vfs_bio.c:625 VOP_BWRITE(fffffd806fd0a450) at VOP_BWRITE+0x60 sys/kern/vfs_vops.c:648 ufs_mkdir(ffff80002a35c9f0) at ufs_mkdir+0x547 sys/ufs/ufs/ufs_vnops.c:1160 VOP_MKDIR(fffffd806db3b628,ffff80002a35cb50,ffff80002a35cb80,ffff80002a35ca80) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800045fef240,ffffff9c,7eb1cdd67c60,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 syscall(ffff80002a35cd00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35cd00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7eb1cdd67d00, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x74a6842b6db0, count: 14 ddb{1}>