uvm_fault(0xfffffd800b103998, 0x20, 0, 1) -> e fatal page fault panic: e r n e aenneli c iasgnserotton a(ssert>siih_ot ate h >sih_state I GSIS_ PENDIN | _RESTA RT)) = = S I S PE NDING" f a i le d i e "/syz k a l le r /m an ag er / ul t i c ernel/ s n/ker oftintr. c l i e 7 1 S art nISstacTART)c =.. IS_PENDING" failed: file "/syzkaller/mnac(ffrs/fuft337190/0)rne /sys/kern/kern_softintr.c", lini +0x1Pd0ar allel traceback, suppressed... __assert(ffffffff833bp946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1 softintr_dispatch(0) at softintr_dispatch+0x2ea dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839a4800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a4800) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80002a3336e0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a3336e0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f330a5cd060, count: 249 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 20 EXIT 0 1 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 225319 18006 0 0 0x4000000 0 syz-executor * 37168 73309 0 0x10000002 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x766843000dc0, 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 *cpu0: uvm_fault(0xfffffd800b103998, 0x20, 0, 1) -> e cpu1: kernel diagnostic assertion "(sih->sih_state & (SIS_PENDING | SIS_RESTART)) == SIS_PENDING" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_softintr.c", line 71 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x766843000dc0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3d7100 rbx 0 rdx 0 rcx 0xffff8000ffff2d08 rax 0x33 r8 0xffff80002a3d7030 r9 0 r10 0x4db40b1e416e1140 r11 0xf631deba4b7765a2 r12 0 r13 0 r14 0xffff8000ffff2d08 r15 0 rip 0xffffffff822643ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3d7080 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=37168 pid=73309 tcnt=1 stat=onproc flags process=10000002 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2540,0xffff8000ffff27e8 process=0xffff8000ffff79c8 user=0xffff80002a3d2000, vmspace=0xfffffd806ef6f008 estcpu=36, cpticks=210, pctcpu=0.52, user=3, sys=204, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35518 412394 95615 0 2 0 syz-executor 35518 398412 95615 0 3 0x4000080 fsleep syz-executor 18006 329047 46786 0 2 0 syz-executor 18006 225319 46786 0 7 0x4000000 syz-executor 18006 501410 46786 0 3 0x4000080 fsleep syz-executor 84222 510747 31469 0 2 0 syz-executor 84222 263755 31469 0 2 0x4000000 syz-executor 18191 458440 12002 0 2 0xc80 syz-executor 18191 359731 12002 0 3 0x4000080 lockf syz-executor 18191 350888 12002 0 3 0x4000080 fsleep syz-executor 89461 48627 17515 0 3 0x2 netlock syz-executor 9477 296405 40620 0 4 0x82000 syz-executor 9477 2166 40620 0 2 0x4082000 syz-executor 9477 511593 40620 0 3 0x4002000 suspend syz-executor 9477 27240 40620 0 4 0x4082000 syz-executor 22407 495926 0 0 3 0x14200 acct acct 95615 322587 17515 0 3 0x82 nanoslp syz-executor 30510 517681 0 0 3 0x14200 bored sosplice 46786 264915 17515 0 3 0x82 nanoslp syz-executor *73309 37168 17515 0 7 0x10000002 syz-executor 56380 107353 17515 0 3 0x82 wait syz-executor 31469 515783 17515 0 3 0x82 nanoslp syz-executor 12002 25904 17515 0 2 0xc82 syz-executor 40620 344176 17515 0 3 0x82 nanoslp syz-executor 17515 239292 74712 0 3 0x82 kqread syz-executor 74712 430411 69964 0 3 0x10008a sigsusp ksh 69964 500987 96050 0 3 0x98 kqread sshd-session 96050 145730 57711 0 3 0x92 kqread sshd-session 21748 74710 1 0 3 0x100083 ttyin getty 57711 108552 1 0 3 0x88 kqread sshd 12692 204693 38537 74 3 0x1100092 bpf pflogd 38537 150319 1 0 3 0x80 sbwait pflogd 4723 269271 30149 73 3 0x1100090 kqread syslogd 30149 106972 1 0 3 0x100082 sbwait syslogd 14978 375866 1 0 3 0x100080 kqread resolvd 82181 310092 75504 77 3 0x100092 kqread dhcpleased 242 109379 75504 77 3 0x100092 kqread dhcpleased 75504 214281 1 0 3 0x80 kqread dhcpleased 91667 262511 0 0 3 0x14200 bored smr 74108 436339 0 0 2 0x14200 zerothread 91263 433794 0 0 3 0x14200 aiodoned aiodoned 74702 401172 0 0 3 0x14200 syncer update 55168 449223 0 0 3 0x14200 cleaner cleaner 80513 463753 0 0 3 0x14200 reaper reaper 94604 297173 0 0 3 0x14200 pgdaemon pagedaemon 55934 48327 0 0 3 0x14200 bored viomb 90459 365280 0 0 3 0x40014200 acpi0 acpi0 12807 141993 0 0 3 0x40014200 idle1 72293 303994 0 0 3 0x14200 bored softnet7 42333 313144 0 0 3 0x14200 bored softnet6 98516 271639 0 0 3 0x14200 bored softnet5 82382 43047 0 0 3 0x14200 bored softnet4 38646 114196 0 0 3 0x14200 bored softnet3 32446 308820 0 0 3 0x14200 bored softnet2 34143 443336 0 0 3 0x14200 bored softnet1 93349 361255 0 0 3 0x14200 bored softnet0 280 453816 0 0 3 0x14200 bored systqmp 12906 43222 0 0 3 0x14200 bored systq 83600 15717 0 0 3 0x14200 tmoslp softclockmp 83230 79959 0 0 3 0x40014200 tmoslp softclock 7926 163867 0 0 3 0x40014200 idle0 1 202133 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 18006 (syz-executor) thread 0xffff8000ffff3238 (225319) Process 84222 (syz-executor) thread 0xffff80003b02f4e8 (263755) Process 9477 (syz-executor) thread 0xffff80003b02fa18 (2166) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10262 11093K 11200K 166960K 12618 0 pcb 17 16K 18K 166960K 552 0 rtable 183 10K 13K 166960K 774 0 pf 39 18K 82K 166960K 654 0 ifaddr 35 6K 7K 166960K 148 0 ifgroup 59 2K 2K 166960K 242 0 sysctl 4 1K 9K 166960K 21 0 counters 70 37K 38K 166960K 418 0 ioctlops 0 0K 5K 166960K 2361 0 iov 0 0K 28K 166960K 101 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1394 88K 88K 166960K 2816 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 160 0 dirhash 12 2K 3K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1731 0 sigio 0 0K 0K 166960K 30 0 proc 73 115K 164K 166960K 775 0 subproc 72 4K 4K 166960K 92 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 224 0 in_multi 59 4K 7K 166960K 245 0 ether_multi 1 0K 0K 166960K 29 0 mrt 3 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 620 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 4K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 168K 185K 166960K 17595 0 UVM aobj 36 2K 2K 166960K 39 0 pinsyscall 42 84K 99K 166960K 2884 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 108 0 NDP 15 0K 2K 166960K 101 0 temp 78 8652K 8720K 166960K 102140 0 kqueue 16 22K 35K 166960K 417 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 120 160 0 155 1 0 1 1 0 8 0 rtentry 176 187 0 122 5 0 5 5 0 8 0 unpcb 144 994 0 977 9 8 1 4 0 8 0 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 444 0 436 8 6 2 4 0 8 1 arp 128 19 0 7 1 0 1 1 0 8 0 inpcb 328 1908 0 1895 21 14 7 7 0 8 5 nd6 144 33 0 24 1 0 1 1 0 8 0 pkpcb 40 147 0 147 4 3 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1192 155 0 155 2 1 1 1 0 8 1 pppxif 1504 11 0 11 4 3 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 16 0 7 1 0 1 1 0 482 0 pffrnode 88 12 0 4 1 0 1 1 0 8 0 pffrent 40 25 0 16 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 100 0 100 4 3 1 1 0 8 1 pfanchor 1288 70 0 67 1 0 1 1 0 8 0 pftag 88 26 0 25 1 0 1 1 0 8 0 pfstitem 24 143 0 42 1 0 1 1 0 8 0 pfstkey 128 149 0 46 4 0 4 4 0 8 0 pfstate 384 142 0 44 10 0 10 10 0 8 0 pfrule 1344 77 0 72 2 1 1 2 0 8 0 rttmr 136 7 0 7 3 2 1 1 0 8 1 art_heap8 4096 6 0 2 6 2 4 6 0 8 0 art_heap4 256 1074 0 781 33 11 22 28 0 8 3 art_table 40 1080 0 783 5 0 5 5 0 8 0 art_node 32 187 0 131 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 9 1 0 1 1 0 8 0 semapl 112 153 0 143 1 0 1 1 0 8 0 shmpl 112 36 0 3 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 4833 0 3322 95 0 95 95 0 8 0 ffsino 296 4833 0 3322 117 0 117 117 0 8 0 nchpl 144 7259 0 5561 64 0 64 64 0 8 0 rtmask 32 19 0 19 4 3 1 1 0 8 1 uvmvnodes 80 5579 0 0 114 0 114 114 0 8 0 vnodes 216 5579 0 0 310 0 310 310 0 8 0 namei 1024 25025 0 25025 4 3 1 2 0 8 1 percpumem 16 224 0 174 1 0 1 1 0 8 0 pfiaddrpl 120 25 0 25 4 3 1 1 0 8 1 kstatmem 264 160 0 130 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 3 3 0 1 0 8 0 scxspl 216 49304 0 49304 14 12 2 8 1 8 2 plimitpl 152 589 0 567 1 0 1 1 0 8 0 sigapl 424 2066 0 2010 10 1 9 9 0 8 1 knotepl 120 1005 0 0 30 0 30 30 0 8 0 kqueuepl 224 687 0 676 8 6 2 5 0 8 1 pipepl 344 355 0 328 15 4 11 14 0 8 8 fdescpl 528 1993 0 1962 3 0 3 3 0 8 0 filepl 160 13072 0 12847 34 15 19 23 0 8 8 lockfpl 104 919 0 915 2 1 1 2 0 8 0 lockfspl 48 266 0 263 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 2424 0 2410 1 0 1 1 0 8 0 zombiepl 144 2339 0 2336 1 0 1 1 0 8 0 processpl 1232 2066 0 2010 7 1 6 6 0 8 1 procpl 664 4793 0 4728 13 5 8 9 0 8 1 sosppl 168 16 0 16 2 1 1 1 0 8 1 sockpl 752 3305 0 3270 32 21 11 14 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 69 0 0 9 0 9 9 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1113 0 0 70 0 70 70 0 8 0 bufpl 280 21044 0 14901 440 0 440 440 0 8 0 anonpl 32 12507 0 0 102 1 101 101 0 246 0 amapchunkpl 152 59193 0 58594 55 15 40 40 0 158 13 amappl16 200 7202 0 7025 49 31 18 26 0 8 8 amappl15 192 9 0 8 3 2 1 1 0 8 0 amappl14 184 153 0 141 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 2683 0 2652 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 249 0 248 1 0 1 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 118 0 105 1 0 1 1 0 8 0 amappl6 120 276 0 272 1 0 1 1 0 8 0 amappl5 112 132 0 122 1 0 1 1 0 8 0 amappl4 104 327 0 307 1 0 1 1 0 8 0 amappl3 96 10443 0 10338 3 0 3 3 0 8 0 amappl2 88 2280 0 2199 2 0 2 2 0 8 0 amappl1 80 15570 0 14962 16 2 14 15 0 8 0 amappl 88 16552 0 16370 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 10 0 10 5 5 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 38 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1993 0 1962 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1993 0 1962 1 0 1 1 0 8 0 vmmpekpl 168 17587 0 17545 3 0 3 3 0 8 0 vmmpepl 168 130209 0 128029 120 14 106 109 0 357 3 vmsppl 488 1992 0 1962 7 2 5 5 0 8 0 rwobjpl 80 41096 0 34372 138 0 138 138 0 8 0 pdppl 4096 3994 0 3924 108 34 74 82 0 8 4 pvpl 32 21257 0 0 173 1 172 172 0 265 0 pmappl 256 1992 0 1962 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 367 0 63 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83830ff0) 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(ffffffff839a4800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a4800) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vio_ctrleof(ffff80000019fb00) at vio_ctrleof+0x4a sys/dev/pv/if_vio.c:1983 intr_handler(ffff8000360068d0,ffff80000006a200) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:563 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(70) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff8337b692) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff83371900) at panic+0x12d sys/kern/subr_prf.c:218 __assert(ffffffff833b0946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1 end trace frame: 0xffff800036006d40, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83830ff0) 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(ffffffff839a4800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a4800) at __mp_lock+0x192 sys/kern/kern_lock.c:165 vio_ctrleof(ffff80000019fb00) at vio_ctrleof+0x4a sys/dev/pv/if_vio.c:1983 intr_handler(ffff8000360068d0,ffff80000006a200) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:563 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(70) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 db_printf(ffffffff8337b692) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff83371900) at panic+0x12d sys/kern/subr_prf.c:218 __assert(ffffffff833b0946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1 softintr_dispatch(0) at softintr_dispatch+0x2ea dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 tsleep_nsec(ffff8000000396f4,10,ffffffff833adf1c,12a05f200) at tsleep_nsec+0x1e4 sys/kern/kern_synch.c:143 vio_ctrl_submit(ffff800000039000,0) at vio_ctrl_submit+0x181 sys/dev/pv/if_vio.c:1832 vio_ctrl_mq(ffff800000039000) at vio_ctrl_mq+0x116 sys/dev/pv/if_vio.c:1919 vio_stop(ffff800000039058,1) at vio_stop+0x525 virtio_has_feature sys/dev/pv/virtiovar.h:226 [inline] vio_stop(ffff800000039058,1) at vio_stop+0x525 sys/dev/pv/if_vio.c:1046 vio_ioctl(ffff800000039058,80206910,ffff800036007010) at vio_ioctl+0x565 sys/dev/pv/if_vio.c:-1 if_downall() at if_downall+0xe2 sys/net/if.c:1722 boot(104) at boot+0x1e1 sys/arch/amd64/amd64/machdep.c:922 reboot(104) at reboot+0xb1 panic(ffffffff83371900) at panic+0x1f9 __assert(ffffffff833b0946,ffffffff8331ee0b,47,ffffffff83416792) at __assert+0x29 sys/kern/subr_prf.c:-1 softintr_dispatch(0) at softintr_dispatch+0x2ea dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 kputchar(20,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff833377d8) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff800036007590,6) at trap_print+0xd8 sys/arch/amd64/amd64/trap.c:631 kerntrap(ffff800036007590) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:485 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b mtx_enter_try(18) at mtx_enter_try+0x7b sys/kern/kern_lock.c:290 mtx_enter(18) at mtx_enter+0x62 sys/kern/kern_lock.c:261 clockintr_unbind(ffff8000014e2b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001479000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(11e5f,81,2000,ffff8000ffff3238) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff3238) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036007820) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807d02f7e8,81,fffffd80097fb750,ffff8000ffff3238) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b86fd60,ffff8000ffff3238) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b86fd60,ffff8000ffff3238) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b86fd60,ffff8000ffff3238) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b86fd60,ffff8000ffff3238) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff800036007a80) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036007a80) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdde011588f0, count: -49 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x766843000dc0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x766843000dc0, count: -1