uvm_fault(0xfffffd806ef38788, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81d2b590 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003a7f3f80 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81d2b590 Starting stack trace... panic(ffffffff833325a8) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003a7f3ed0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800000afb000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(31e5f,81,2000,ffff80003ac10558) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff80003ac10558) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003a7f4080) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807a6ade78,81,fffffd80097fb7b8,ffff80003ac10558) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1f0548,ffff80003ac10558) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1f0548,ffff80003ac10558) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1f0548,ffff80003ac10558) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c1f0548,ffff80003ac10558) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003ac10558) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003ac10558,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003ac10558,ffff80003a7f43f0,ffff80003a7f4340) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a7f43f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a7f43f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75362ed31d50, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *335755 19061 0 0 0 1 syz-executor 192976 43130 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ce908b93fa0, 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(0xfffffd806ef38788, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ce908b93fa0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000323dcdb0 rbx 0 rdx 0 rcx 0xffff800033bdf738 rax 0x2a r8 0xffff8000323dcce0 r9 0x1 r10 0xee7e013e299985ae r11 0xfcf088dff26b885 r12 0 r13 0xffffffff81a47d38 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff81c734c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000323dcd30 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=335755 pid=19061 tcnt=2 stat=onproc flags process=0 proc=0 runpri=83, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003ac11748,0xffff800033bdf4b8 process=0xffff8000fffe5c78 user=0xffff8000323d7000, vmspace=0xfffffd806a11f028 estcpu=33, cpticks=7, pctcpu=0.0, user=5, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40550 352732 38604 0 3 0x80 nanoslp syz-executor 40550 1857 38604 0 3 0x4000080 fsleep syz-executor 40550 40988 38604 0 3 0x4000080 fsleep syz-executor 40550 332201 38604 0 3 0x4000080 fsleep syz-executor *19061 335755 74621 0 7 0 syz-executor 19061 97596 74621 0 3 0x4000080 fsleep syz-executor 43130 192976 65953 0 7 0 syz-executor 43130 342587 65953 0 2 0x4000000 syz-executor 27295 255146 67184 0 2 0 syz-executor 27295 327300 67184 0 3 0x4000080 fsleep syz-executor 27295 227171 67184 0 3 0x4000080 fsleep syz-executor 97832 205927 74343 0 3 0x80 nanoslp syz-executor 97832 350760 74343 0 3 0x4000080 fsleep syz-executor 97832 460392 74343 0 3 0x4000080 fsleep syz-executor 97832 460386 74343 0 3 0x4000080 fsleep syz-executor 18999 99339 44986 0 3 0x82 nanoslp syz-executor 74621 400652 44986 0 3 0x82 nanoslp syz-executor 97165 143342 1 0 3 0x100083 ttyin getty 55940 136761 0 0 3 0x14200 bored sosplice 41745 423207 44986 0 2 0x2 syz-executor 38604 80741 44986 0 3 0x82 nanoslp syz-executor 67184 90334 44986 0 3 0x82 nanoslp syz-executor 92540 511939 44986 0 3 0x2 biowait syz-executor 74343 313488 44986 0 3 0x82 nanoslp syz-executor 65953 126063 44986 0 3 0x82 nanoslp syz-executor 44986 250150 31604 0 3 0x82 kqread syz-executor 31604 10828 92892 0 3 0x10008a sigsusp ksh 92892 138877 55122 0 3 0x98 kqread sshd-session 55122 45983 59340 0 3 0x92 kqread sshd-session 59340 361458 1 0 3 0x88 kqread sshd 91121 130878 1903 74 3 0x1100092 bpf pflogd 1903 226683 1 0 3 0x80 sbwait pflogd 46082 488925 71021 73 3 0x1100090 kqread syslogd 71021 218081 1 0 3 0x100082 sbwait syslogd 37727 488436 1 0 3 0x100080 kqread resolvd 70296 368959 72156 77 3 0x100092 kqread dhcpleased 43287 129269 72156 77 3 0x100092 kqread dhcpleased 72156 156910 1 0 3 0x80 kqread dhcpleased 26200 229962 0 0 3 0x14200 bored smr 38923 21436 0 0 3 0x14200 pgzero zerothread 26959 110219 0 0 3 0x14200 aiodoned aiodoned 28292 482278 0 0 3 0x14200 syncer update 19089 285461 0 0 3 0x14200 cleaner cleaner 26360 277971 0 0 3 0x14200 reaper reaper 64674 185758 0 0 3 0x14200 pgdaemon pagedaemon 73833 371750 0 0 3 0x14200 bored viomb 30855 126897 0 0 3 0x40014200 acpi0 acpi0 73191 29770 0 0 3 0x40014200 idle1 12695 8292 0 0 3 0x14200 bored softnet3 24937 516892 0 0 3 0x14200 bored softnet2 65688 424278 0 0 3 0x14200 bored softnet1 62163 313597 0 0 3 0x14200 netlock softnet0 76286 401587 0 0 2 0x14200 systqmp 21257 244067 0 0 3 0x14200 bored systq 64032 389455 0 0 3 0x14200 tmoslp softclockmp 50704 306498 0 0 3 0x40014200 tmoslp softclock 27925 230536 0 0 3 0x40014200 idle0 1 17687 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 43130 (syz-executor) thread 0xffff80003ac119d8 (342587) exclusive rwlock lockflk r = 0 (0xffffffff83853238) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 lf_advlock+0x22a sys/kern/vfs_lockf.c:261 #3 VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 #4 doopenat+0x4e3 sys/kern/vfs_syscalls.c:-1 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #6 Xsyscall+0x128 Process 92540 (syz-executor) thread 0xffff8000ffff0cf0 (511939) exclusive rrwlock inode r = 0 (0xfffffd8074c37428) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd 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:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cb46318) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10241 11267K 11455K 166960K 12589 0 pcb 17 16K 17K 166960K 222 0 rtable 198 8K 8K 166960K 508 0 pf 37 18K 22K 166960K 185 0 ifaddr 39 6K 8K 166960K 89 0 ifgroup 55 2K 2K 166960K 137 0 sysctl 4 1K 9K 166960K 19 0 counters 68 36K 37K 166960K 324 0 ioctlops 0 0K 4K 166960K 1905 0 iov 0 0K 18K 166960K 46 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1367 86K 86K 166960K 2106 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 32 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 974 0 sigio 0 0K 0K 166960K 81 0 proc 72 91K 128K 166960K 670 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 136 0 in_multi 80 5K 7K 166960K 148 0 ether_multi 1 0K 0K 166960K 2 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 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 515 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 238 171K 186K 166960K 11000 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 41 82K 107K 166960K 2173 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 60 0 NDP 12 0K 2K 166960K 59 0 temp 76 8688K 8778K 166960K 42400 0 kqueue 13 20K 28K 166960K 153 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 93 0 90 1 0 1 1 0 8 0 rtentry 176 153 0 67 6 0 6 6 0 8 0 unpcb 144 716 0 694 6 4 2 4 0 8 1 syncache 336 9 0 9 4 3 1 1 0 8 1 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 808 244 0 237 2 0 2 2 0 8 1 arp 128 24 0 8 1 0 1 1 0 8 0 inpcb 384 1033 0 1022 14 12 2 8 0 8 0 nd6 144 33 0 12 1 0 1 1 0 8 0 pkpcb 40 37 0 37 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 115 0 115 2 1 1 1 0 8 1 pppxif 1504 37 0 37 4 3 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 40 0 37 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 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 55 0 19 1 0 1 1 0 8 0 pfstkey 128 57 0 21 2 0 2 2 0 8 0 pfstate 384 56 0 20 4 0 4 4 0 8 0 pfrule 1344 25 0 16 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 648 0 273 30 6 24 30 0 8 0 art_table 32 650 0 273 4 0 4 4 0 8 0 art_node 16 150 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 7 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3067 0 1566 96 1 95 96 0 8 0 ffsino 288 3067 0 1566 109 0 109 109 0 8 0 nchpl 144 4410 0 2712 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 3593 0 0 74 0 74 74 0 8 0 vnodes 216 3593 0 0 200 0 200 200 0 8 0 namei 1024 15137 0 15137 1 0 1 1 0 8 1 percpumem 16 177 0 128 1 0 1 1 0 8 0 kstatmem 264 78 0 50 5 2 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 13303 0 13302 10 9 1 8 1 8 0 plimitpl 152 123 0 105 1 0 1 1 0 8 0 sigapl 424 1307 0 1258 11 2 9 9 0 8 1 knotepl 120 321 0 0 10 0 10 10 0 8 0 kqueuepl 224 396 0 387 9 8 1 5 0 8 0 pipepl 336 228 0 201 5 0 5 5 0 8 2 fdescpl 520 1268 0 1238 3 0 3 3 0 8 0 filepl 160 7871 0 7643 23 7 16 16 0 8 6 lockfpl 104 300 0 298 2 1 1 2 0 8 0 lockfspl 48 102 0 99 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 960 0 946 1 0 1 1 0 8 0 zombiepl 144 1664 0 1663 1 0 1 1 0 8 0 processpl 1208 1307 0 1258 6 0 6 6 0 8 0 procpl 656 2733 0 2674 9 1 8 8 0 8 1 srpgc 96 8 0 8 2 2 0 1 0 8 0 sockpl 728 1894 0 1858 25 18 7 15 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 347 0 0 22 0 22 22 0 8 0 bufpl 280 3885 0 125 269 0 269 269 0 8 0 anonpl 32 7588 0 0 62 0 62 62 0 246 0 amapchunkpl 152 35709 0 35216 56 26 30 34 0 158 8 amappl16 200 3411 0 3203 38 26 12 15 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 134 0 121 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1965 0 1935 3 1 2 2 0 8 0 amappl11 160 47 0 33 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 267 0 267 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 122 0 109 1 0 1 1 0 8 0 amappl6 120 209 0 206 1 0 1 1 0 8 0 amappl5 112 154 0 143 1 0 1 1 0 8 0 amappl4 104 351 0 328 1 0 1 1 0 8 0 amappl3 96 6994 0 6886 5 1 4 4 0 8 0 amappl2 88 730 0 667 2 0 2 2 0 8 0 amappl1 80 13078 0 12472 18 3 15 15 0 8 1 amappl 88 10078 0 9913 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 72 0 72 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 1268 0 1238 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1268 0 1238 1 0 1 1 0 8 0 vmmpekpl 168 12066 0 12018 3 0 3 3 0 8 0 vmmpepl 168 85732 0 83596 109 11 98 99 0 357 0 vmsppl 480 1267 0 1238 6 1 5 5 0 8 0 rwobjpl 72 27951 0 23229 87 0 87 87 0 8 0 pdppl 4096 2544 0 2476 108 36 72 84 0 8 4 pvpl 32 15821 0 0 129 1 128 128 0 265 0 pmappl 256 1267 0 1238 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 411 0 49 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0