uvm_fault(0xffffee805eaf0028, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81226958 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c3d6690 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81226958 Starting stack trace... panic(ffffffff834f2571) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c3d65e0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fef770,ffffee805e9c2210,ffff80003c3d67c0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff800045fef770,ffff80003c3d6910,ffff80003c3d6860) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c3d6910) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d6910) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfee07199830, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -11481168 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *129456 35382 0 0 0x4000000 1 syz-executor 473636 13632 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x106bd00ae00, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffee805eaf0028, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x106bd00ae00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800038bb0d40 rbx 0 rdx 0xffff8000015fe180 rcx 0xffff800045fe7a10 rax 0x3a r8 0xffff800038bb0c70 r9 0x1 r10 0xcbaea8c3ecc93a68 r11 0x3d6275126489d117 r12 0 r13 0 r14 0xffff800045fe7a10 r15 0 rip 0xffffffff826b93ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800038bb0cc0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=129456 pid=35382 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045fe4030,0xffff800045fe6a90 process=0xffff800045fe8e88 user=0xffff800038bab000, vmspace=0xffffee805eaf03f8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 14324 361706 51920 0 2 0 0 syz-executor 14324 195944 51920 0 3 0 0x4000000 sbar syz-executor 17464 322382 80257 0 2 0 0 syz-executor 17464 153451 80257 0 3 0 0x4000080 fsleep syz-executor 17464 90831 80257 0 3 0 0x4000080 fsleep syz-executor 36446 276342 1901 0 2 0 0xc80 syz-executor 36446 383071 1901 0 3 0 0x4000080 fsleep syz-executor 36446 41379 1901 0 3 0 0x4000080 ttyopn syz-executor 35382 258367 46431 0 2 0 0 syz-executor *35382 129456 46431 0 7 0 0x4000000 syz-executor 35382 108286 46431 0 3 0 0x4000080 piperd syz-executor 88184 304809 37414 0 2 0 0xc80 syz-executor 88184 311052 37414 0 3 0 0x4000080 fsleep syz-executor 88184 212971 37414 0 3 0 0x4000080 pipewr syz-executor 97603 460442 20594 0 2 0 0xc80 syz-executor 97603 52531 20594 0 3 0 0x4000080 semwait syz-executor 97603 115811 20594 0 3 0 0x4000080 fsleep syz-executor 548 66180 0 0 3 0x14000 0x200 acct acct 39279 486724 40777 0 2 0 0xc80 syz-executor 39279 62018 40777 0 3 0 0x4000080 fsleep syz-executor 39279 61788 40777 0 3 0 0x4000080 msgwait syz-executor 13632 473636 28911 0 7 0x2 0 syz-executor 54901 198320 1 0 3 0 0x80 nanoslp init 51920 405430 28911 0 2 0x2 0xc80 syz-executor 20594 73743 28911 0 2 0x2 0xc80 syz-executor 1901 204635 28911 0 2 0x2 0xc80 syz-executor 80257 395139 28911 0 2 0x2 0xc80 syz-executor 46431 356650 28911 0 2 0x2 0xc80 syz-executor 37414 113266 28911 0 2 0x2 0xc80 syz-executor 40777 324012 28911 0 2 0x2 0xc80 syz-executor 28911 522201 72384 0 3 0x2 0x80 kqread syz-executor 72384 163170 7425 0 3 0x100002 0x88 sigsusp ksh 7425 316617 22173 0 3 0x10 0x88 kqread sshd-session 22173 109595 2486 0 3 0x12 0x80 kqread sshd-session 2486 479330 1 0 3 0 0x88 kqread sshd 3727 146426 4730 74 3 0x1100012 0x80 bpf pflogd 4730 227100 1 0 3 0 0x80 sbwait pflogd 39778 150965 14037 73 3 0x1100010 0x80 kqread syslogd 14037 488439 1 0 3 0x100002 0x80 sbwait syslogd 38324 480595 1 0 3 0x100000 0x80 kqread resolvd 86932 342631 34086 77 3 0x100012 0x80 kqread dhcpleased 83883 2863 34086 77 3 0x100012 0x80 kqread dhcpleased 34086 204921 1 0 3 0 0x80 kqread dhcpleased 121 476062 0 0 3 0x14000 0x200 bored smr 13850 169912 0 0 2 0x14000 0x200 zerothread 83936 321541 0 0 3 0x14000 0x200 aiodoned aiodoned 51307 215678 0 0 3 0x14000 0x200 syncer update 65575 242817 0 0 3 0x14000 0x200 cleaner cleaner 71061 498103 0 0 3 0x14000 0x200 reaper reaper 20367 375564 0 0 3 0x14000 0x200 pgdaemon pagedaemon 95718 106614 0 0 3 0x14000 0x200 bored viomb 28861 284585 0 0 3 0x14000 0x40000200 acpi0 acpi0 59016 392880 0 0 3 0x14000 0x40000200 idle1 56219 209723 0 0 3 0x14000 0x200 bored softnet1 23570 5062 0 0 2 0x14000 0x200 softnet0 88981 471569 0 0 2 0x14000 0x200 systqmp 56408 368424 0 0 3 0x14000 0x200 bored systq 78927 365228 0 0 3 0x14000 0x200 netlock softclockmp 35580 227958 0 0 3 0x14000 0x40000200 tmoslp softclock 1818 472609 0 0 3 0x14000 0x40000200 idle0 1 213589 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 14324 (syz-executor) thread 0xffff800045fef770 (195944) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a7a440) #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 13632 (syz-executor) thread 0xffff800045fe7ca8 (473636) exclusive rrwlock inode r = 0 (0xffffee806ce28440) #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 (0xffffee806d549d78) #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 11080 12108K 12473K 166960K 12796 0 pcb 17 13K 13K 166960K 138 0 rtable 248 17K 17K 166960K 470 0 pf 39 18K 25K 166960K 186 0 ifaddr 41 7K 7K 166960K 69 0 ifgroup 59 2K 2K 166960K 114 0 sysctl 1 1K 9K 166960K 39 0 counters 72 37K 37K 166960K 124 0 ioctlops 0 0K 4K 166960K 1636 0 iov 1 1K 12K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1303 82K 82K 166960K 1800 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 13 0K 0K 166960K 67 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 93K 166960K 652 0 sigio 0 0K 0K 166960K 5 0 proc 63 99K 164K 166960K 649 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 68 0 in_multi 88 5K 6K 166960K 133 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 434 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 239 163K 177K 166960K 7436 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 41 82K 107K 166960K 1842 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 13 0K 2K 166960K 50 0 temp 41 9115K 9179K 166960K 22606 0 kqueue 13 20K 28K 166960K 116 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 120 128 0 124 3 2 1 3 0 8 0 rtentry 176 128 0 27 6 0 6 6 0 8 0 unpcb 144 225 0 208 2 0 2 2 0 8 1 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 736 183 0 178 7 3 4 4 0 8 2 arp 136 21 0 5 1 0 1 1 0 8 0 inpcb 328 626 0 583 9 2 7 7 0 8 2 nd6 152 29 0 6 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 19 0 19 2 1 1 1 0 8 1 pfstscr 40 6 0 2 1 0 1 1 0 8 0 pffrag 232 12 0 3 1 0 1 1 0 482 0 pffrnode 88 9 0 2 1 0 1 1 0 8 0 pffrent 40 26 0 14 1 0 1 1 0 8 0 pfosfp 40 1437 0 1436 5 4 1 5 0 8 0 pfosfpen 112 1437 0 1436 21 12 9 21 0 8 8 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfsrclim 320 6 0 6 1 0 1 1 0 8 1 pfstlim 224 2 0 2 2 1 1 1 0 8 1 pfanchor 1288 5 0 0 1 0 1 1 0 8 0 pfstitem 24 51 0 3 1 0 1 1 0 8 0 pfstkey 128 53 0 5 2 0 2 2 0 8 0 pfstate 448 50 0 4 6 0 6 6 0 8 0 pfrule 1360 30 0 28 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 535 0 95 31 0 31 31 0 8 1 art_table 40 536 0 95 5 0 5 5 0 8 0 art_node 32 128 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 72 63 0 53 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2439 0 963 93 0 93 93 0 8 0 ffsino 296 2439 0 963 114 0 114 114 0 8 0 nchpl 144 3309 0 1600 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 vnodes 216 2800 0 0 156 0 156 156 0 8 0 namei 1024 10264 0 10263 3 2 1 2 0 8 0 percpumem 16 78 0 26 1 0 1 1 0 8 0 kstatmem 264 67 0 36 4 1 3 3 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 13494 0 13494 13 9 4 8 1 8 4 plimitpl 152 74 0 57 1 0 1 1 0 8 0 sigapl 424 971 0 923 7 1 6 7 0 8 0 knotepl 120 541 0 0 17 0 17 17 0 8 0 kqueuepl 224 162 0 153 1 0 1 1 0 8 0 pipepl 344 155 0 126 3 0 3 3 0 8 0 fdescpl 528 954 0 923 3 0 3 3 0 8 0 filepl 160 4332 0 4077 14 2 12 12 0 8 0 lockfpl 104 166 0 163 1 0 1 1 0 8 0 lockfspl 48 75 0 72 1 0 1 1 0 8 0 sessionpl 144 50 0 42 1 0 1 1 0 8 0 pgrppl 48 59 0 43 1 0 1 1 0 8 0 ucredpl 104 621 0 608 1 0 1 1 0 8 0 zombiepl 144 923 0 923 1 0 1 1 0 8 1 processpl 1232 971 0 923 5 1 4 5 0 8 0 procpl 664 1678 0 1617 7 1 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 1019 0 954 12 2 10 10 0 8 2 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k128 9344 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 186 0 0 12 0 12 12 0 8 0 bufpl 272 4482 0 106 292 0 292 292 0 8 0 anonpl 32 8526 0 0 69 0 69 69 0 247 0 amapchunkpl 152 23962 0 23457 31 3 28 28 0 158 7 amappl16 200 2966 0 2935 21 9 12 18 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 443 0 442 1 0 1 1 0 8 0 amappl13 176 125 0 114 1 0 1 1 0 8 0 amappl12 168 1218 0 1189 2 0 2 2 0 8 0 amappl11 160 18 0 18 1 1 0 1 0 8 0 amappl10 152 110 0 96 1 0 1 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 114 0 112 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 164 0 163 1 0 1 1 0 8 0 amappl5 112 153 0 142 1 0 1 1 0 8 0 amappl4 104 301 0 283 1 0 1 1 0 8 0 amappl3 96 4215 0 4117 3 0 3 3 0 8 0 amappl2 88 1078 0 996 2 0 2 2 0 8 0 amappl1 80 12605 0 12031 15 2 13 15 0 8 0 amappl 88 6623 0 6453 6 1 5 5 0 92 0 uvmvnodes 80 106 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 7 0 7 2 2 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 24 954 0 923 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 954 0 923 1 0 1 1 0 8 0 vmmpekpl 168 8865 0 8818 3 0 3 3 0 8 0 vmmpepl 168 66927 0 65031 101 4 97 98 0 357 11 vmsppl 488 953 0 923 6 1 5 5 0 8 0 rwobjpl 80 20651 0 19638 29 1 28 28 0 8 1 pdppl 4096 1915 0 1846 103 32 71 87 0 8 2 pvpl 32 15730 0 0 128 1 127 127 0 265 0 pmappl 256 953 0 923 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 586 0 42 16 0 16 16 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83984ff0) 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 __mp_lock(ffffffff83a79c40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a79c40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83a79c40,1) 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(ffffee806fb35668) at biowait+0xc6 sys/kern/vfs_bio.c:1110 bwrite(ffffee806fb35668) at bwrite+0x359 sys/kern/vfs_bio.c:625 ffs_update(ffffee806ce283a0,1) at ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 ufs_mkdir(ffff800037ba61b0) at ufs_mkdir+0x520 sys/ufs/ufs/ufs_vnops.c:1160 VOP_MKDIR(ffffee805f6a90f0,ffff800037ba6310,ffff800037ba6340,ffff800037ba6240) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800045fe7ca8,ffffff9c,6fc1e99af430,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 syscall(ffff800037ba64c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037ba64c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fc1e99af4d0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff83984ff0) 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 __mp_lock(ffffffff83a79c40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a79c40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83a79c40,1) 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(ffffee806fb35668) at biowait+0xc6 sys/kern/vfs_bio.c:1110 bwrite(ffffee806fb35668) at bwrite+0x359 sys/kern/vfs_bio.c:625 ffs_update(ffffee806ce283a0,1) at ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 ufs_mkdir(ffff800037ba61b0) at ufs_mkdir+0x520 sys/ufs/ufs/ufs_vnops.c:1160 VOP_MKDIR(ffffee805f6a90f0,ffff800037ba6310,ffff800037ba6340,ffff800037ba6240) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff800045fe7ca8,ffffff9c,6fc1e99af430,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 syscall(ffff800037ba64c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037ba64c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fc1e99af4d0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x106bd00ae00, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x106bd00ae00, count: -1