uvm_fault(0xfffffd805d96b3f8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8190e738 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002b3f6fc0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8190e738 Starting stack trace... panic(ffffffff833a4fb8) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002b3f6f10) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001516000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003b009ca8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b009ca8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002b3f70c0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d381b48,81,fffffd80097fb5b0,ffff80003b009ca8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1570c8,ffff80003b009ca8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1570c8,ffff80003b009ca8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1570c8,ffff80003b009ca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c1570c8,ffff80003b009ca8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b009ca8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003b009ca8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b009ca8,ffff80002b3f7430,ffff80002b3f7380) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002b3f7430) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002b3f7430) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d43ebaae520, count: 242 End of stack trace. WARN ING: SPL NOT LOWERED ON SYSCALL 83 1075773648 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *349897 27372 0 0 0x4000000 1 syz-executor 496824 6952 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0x30b8fa0cf60, 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(0xfffffd805d96b3f8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x30b8fa0cf60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003b007570 rbx 0 rdx 0xffff80000147b240 rcx 0xffff8000fffef770 rax 0x3b r8 0xffff80003b0074a0 r9 0x1 r10 0x283a8335737e00e r11 0x3aa9abc0b6893972 r12 0 r13 0 r14 0xffff8000fffef770 r15 0 rip 0xffffffff81a233ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003b0074f0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=349897 pid=27372 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffee018,0xffffffff83917b08 process=0xffff8000ffff61b8 user=0xffff80003b002000, vmspace=0xfffffd805d96b7c8 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 27372 22714 55404 0 2 0 syz-executor *27372 349897 55404 0 7 0x4000000 syz-executor 92907 185623 99079 0 2 0 syz-executor 92907 109873 99079 0 3 0x4000080 fsleep syz-executor 67860 508424 21933 0 2 0 syz-executor 67860 440855 21933 0 3 0x4000080 fsleep syz-executor 40310 498265 0 0 3 0x14200 acct acct 54655 32291 46720 -1 2 0x10 syz-executor 54655 127078 46720 -1 3 0x4000090 fsleep syz-executor 57828 193803 62654 0 2 0xc80 syz-executor 57828 263520 62654 0 3 0x4000080 msgwait syz-executor 57828 195742 62654 0 3 0x4000080 fsleep syz-executor 36542 487624 32971 -1 2 0xc90 syz-executor 36542 336823 32971 -1 3 0x4000090 kqread syz-executor 36542 302578 32971 -1 3 0x4000090 kqread syz-executor 36542 102470 32971 -1 3 0x4000090 fsleep syz-executor 93887 379363 48205 0 2 0x2 syz-executor 46720 401701 48205 0 2 0xc82 syz-executor 32971 133218 48205 0 2 0xc82 syz-executor 35339 32793 0 0 3 0x14200 bored sosplice 80968 390971 1 0 2 0x100083 getty 55404 415643 48205 0 2 0xc82 syz-executor 62654 478734 48205 0 2 0xc82 syz-executor 56951 50896 48205 0 2 0xc82 syz-executor 21933 369611 48205 0 2 0xc82 syz-executor 99079 63393 48205 0 2 0xc82 syz-executor 48205 114215 1927 0 3 0x82 kqread syz-executor 1927 175496 73113 0 3 0x10008a sigsusp ksh 73113 181196 67788 0 3 0x98 kqread sshd-session 67788 131795 75272 0 3 0x92 kqread sshd-session 75272 346753 1 0 3 0x88 kqread sshd 50412 10138 66409 74 3 0x1100092 bpf pflogd 66409 483332 1 0 3 0x80 sbwait pflogd 33810 67603 1689 73 3 0x1100090 kqread syslogd 1689 235868 1 0 3 0x100082 sbwait syslogd 71008 252205 1 0 3 0x100080 kqread resolvd 53086 7774 77736 77 3 0x100092 kqread dhcpleased 88056 430457 77736 77 3 0x100092 kqread dhcpleased 77736 231296 1 0 3 0x80 kqread dhcpleased 20960 460322 0 0 3 0x14200 bored smr 56397 300663 0 0 2 0x14200 zerothread 62425 445124 0 0 3 0x14200 aiodoned aiodoned 77990 204822 0 0 2 0x14e00 update 38289 196570 0 0 3 0x14200 cleaner cleaner 86919 392813 0 0 3 0x14200 reaper reaper 14330 332159 0 0 3 0x14200 pgdaemon pagedaemon 98134 169911 0 0 3 0x14200 bored viomb 25698 137268 0 0 3 0x40014200 acpi0 acpi0 6906 30358 0 0 3 0x40014200 idle1 97948 71977 0 0 3 0x14200 bored softnet1 24835 114597 0 0 2 0x14200 softnet0 21228 21461 0 0 2 0x14200 systqmp 19641 485281 0 0 3 0x14200 bored systq 59308 269225 0 0 2 0x14200 softclockmp 6952 496824 0 0 7 0x40014200 softclock 21620 185087 0 0 3 0x40014200 idle0 1 363360 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 93887 (syz-executor) thread 0xffff800038bf87f0 (379363) exclusive rrwlock inode r = 0 (0xfffffd806bc8eeb8) #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+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #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+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b8fd7d0) #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+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11142K 11685K 166960K 12739 0 pcb 17 15K 16K 166960K 172 0 rtable 191 8K 8K 166960K 384 0 pf 32 17K 67484K 166960K 137 0 ifaddr 38 6K 8K 166960K 102 0 ifgroup 51 2K 2K 166960K 170 0 sysctl 3 1K 9K 166960K 12 0 counters 66 36K 37K 166960K 174 0 ioctlops 0 0K 4K 166960K 1645 0 iov 0 0K 28K 166960K 67 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1495 94K 94K 166960K 2224 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 58 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 788 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 164K 166960K 696 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 73 0 in_multi 85 6K 7K 166960K 164 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 482 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 155K 170K 166960K 8756 0 UVM aobj 26 4K 4K 166960K 26 0 pinsyscall 42 84K 101K 166960K 1953 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 52 0 NDP 13 0K 2K 166960K 71 0 temp 58 8650K 8747K 166960K 27822 0 kqueue 15 24K 30K 166960K 144 0 SYN cache 2 8K 16K 166960K 3 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 78 0 74 1 0 1 1 0 8 0 rtentry 176 137 0 59 5 0 5 5 0 8 0 unpcb 144 516 0 496 8 2 6 6 0 8 5 syncache 336 5 0 5 3 2 1 1 0 8 1 tcpcb 736 243 0 239 7 3 4 4 0 8 3 arp 136 18 0 5 1 0 1 1 0 8 0 inpcb 328 738 0 727 10 6 4 7 0 8 2 nd6 152 23 0 8 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 1 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 1 1 1 0 8 1 ppxss 1192 37 0 37 1 0 1 1 0 8 1 pppxif 1504 6 0 6 3 2 1 1 0 8 1 pffrag 232 8 0 0 1 0 1 1 0 482 0 pffrnode 88 7 0 0 1 0 1 1 0 8 0 pffrent 40 8 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfstitem 24 49 0 19 1 0 1 1 0 8 0 pfstkey 128 49 0 19 2 0 2 2 0 8 0 pfstate 384 49 0 19 4 0 4 4 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 646 0 269 30 6 24 28 0 8 0 art_table 40 648 0 269 5 0 5 5 0 8 0 art_node 32 137 0 70 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semapl 112 54 0 44 1 0 1 1 0 8 0 shmpl 112 23 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2789 0 1280 96 0 96 96 0 8 0 ffsino 296 2789 0 1280 117 0 117 117 0 8 0 nchpl 144 3877 0 2178 64 0 64 64 0 8 0 uvmvnodes 80 3486 0 0 72 0 72 72 0 8 0 vnodes 216 3486 0 0 194 0 194 194 0 8 0 namei 1024 13515 0 13515 4 3 1 2 0 8 1 percpumem 16 102 0 54 1 0 1 1 0 8 0 kstatmem 264 100 0 76 3 1 2 3 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 28790 0 28790 12 11 1 8 1 8 1 plimitpl 152 131 0 112 1 0 1 1 0 8 0 sigapl 424 1083 0 1034 7 1 6 7 0 8 0 knotepl 120 573 0 0 17 0 17 17 0 8 0 kqueuepl 224 281 0 267 4 2 2 3 0 8 1 pipepl 344 220 0 192 3 0 3 3 0 8 0 fdescpl 528 1064 0 1033 3 0 3 3 0 8 0 filepl 160 6336 0 6102 21 5 16 16 0 8 5 lockfpl 104 396 0 391 2 0 2 2 0 8 1 lockfspl 48 186 0 182 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 50 0 33 1 0 1 1 0 8 0 ucredpl 104 753 0 738 1 0 1 1 0 8 0 zombiepl 144 1035 0 1034 2 1 1 1 0 8 0 processpl 1232 1083 0 1034 5 1 4 5 0 8 0 procpl 664 2202 0 2144 6 0 6 6 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 752 1348 0 1313 26 9 17 17 0 8 13 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 57 0 0 8 0 8 8 0 8 0 mtagpl 96 36 0 0 1 0 1 1 0 8 0 mbufpl 256 206 0 0 13 0 13 13 0 8 0 bufpl 280 12550 0 6407 439 0 439 439 0 8 0 anonpl 32 11738 0 0 95 0 95 95 0 246 0 amapchunkpl 152 30054 0 29447 36 10 26 31 0 158 1 amappl16 200 4618 0 4588 32 22 10 26 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1756 0 1725 4 1 3 3 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 11 0 10 1 0 1 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 170 0 158 1 0 1 1 0 8 0 amappl6 120 203 0 199 1 0 1 1 0 8 0 amappl5 112 176 0 166 1 0 1 1 0 8 0 amappl4 104 352 0 333 1 0 1 1 0 8 0 amappl3 96 4927 0 4834 4 1 3 3 0 8 0 amappl2 88 1307 0 1227 2 0 2 2 0 8 0 amappl1 80 11169 0 10569 15 1 14 14 0 8 0 amappl 88 7939 0 7773 5 0 5 5 0 92 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 25 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1064 0 1033 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1064 0 1033 1 0 1 1 0 8 0 vmmpekpl 168 10029 0 9974 3 0 3 3 0 8 0 vmmpepl 168 73606 0 71613 111 8 103 110 0 357 1 vmsppl 488 1063 0 1033 6 1 5 5 0 8 0 rwobjpl 80 25885 0 21441 91 0 91 91 0 8 0 pdppl 4096 2136 0 2066 102 28 74 84 0 8 4 pvpl 32 20814 0 0 169 1 168 169 0 265 0 pmappl 256 1063 0 1033 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 294 0 45 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837efff0) 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(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a207f30,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83915db8,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff837d87a8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff758) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837efff0) 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(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a207f30,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83915db8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83915db8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83915db8,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 softclock_thread_run(ffffffff837d87a8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff758) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x30b8fa0cf60, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x30b8fa0cf60, count: -1