uvm_fault(0xfffffd806be31b60, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND *314425 39235 0 0 0x4000000 0K syz-executor dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff8000ffff22a0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff22a0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000313e2b40) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bd39888,81,fffffd80097fb5b0,ffff8000ffff22a0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063649bb8,ffff8000ffff22a0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063649bb8,ffff8000ffff22a0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8063649bb8,ffff8000ffff22a0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063649bb8,ffff8000ffff22a0) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff8000313e2da0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000313e2da0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe64f377a2c0, count: 6 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd806be31b60, 0x0, 0, 1) -> e ddb{0}> trace dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff8000ffff22a0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff22a0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000313e2b40) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bd39888,81,fffffd80097fb5b0,ffff8000ffff22a0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063649bb8,ffff8000ffff22a0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063649bb8,ffff8000ffff22a0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8063649bb8,ffff8000ffff22a0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063649bb8,ffff8000ffff22a0) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff8000313e2da0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000313e2da0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe64f377a2c0, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000313e2a70 rbx 0xffffffff822c3380 dtclose rdx 0 rcx 0xffff8000ffff22a0 rax 0xffffffff83844028 dt_prov_syscall r8 0xffffffff82049b40 uvm_map_inentry_sp r9 0x83 r10 0 r11 0x7e56db66dfbd6246 r12 0xffff80000006bf80 r13 0 r14 0 r15 0xffff8000014ed900 rip 0xffffffff822c3760 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff8000313e2a40 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb{0}> show proc PROC (syz-executor) tid=314425 pid=39235 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2abc58,0xffff8000ffff2f80 process=0xffff8000fffeb090 user=0xffff8000313dd000, vmspace=0xfffffd806be31b60 estcpu=32, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93120 133770 29475 0 2 0 syz-executor 93120 136115 29475 0 3 0x4000080 fsleep syz-executor 83526 339121 83794 0 2 0 syz-executor 83526 216489 83794 0 3 0x4000080 fsleep syz-executor 60924 354265 56123 0 2 0 syz-executor 60924 39893 56123 0 3 0x4000080 fsleep syz-executor 2053 320266 733 0 2 0 syz-executor 2053 345140 733 0 3 0x4000080 fsleep syz-executor 2053 126769 733 0 3 0x4000080 fsleep syz-executor 89604 190108 53788 0 2 0 syz-executor 89604 235096 53788 0 3 0x4000080 fsleep syz-executor 89604 156660 53788 0 3 0x4000080 fsleep syz-executor 7274 392441 13972 0 2 0 syz-executor 7274 436210 13972 0 2 0x4000001 syz-executor 39235 257076 55267 0 2 0 syz-executor *39235 314425 55267 0 7 0x4000000 syz-executor 39235 320061 55267 0 3 0x4000080 fsleep syz-executor 39235 95043 55267 0 3 0x4000080 fsleep syz-executor 60888 113023 0 0 3 0x14200 acct acct 31913 51086 0 0 3 0x14200 bored sosplice 36586 442520 67556 0 3 0x100082 sbwait ndp 67556 456093 88552 0 3 0x10008a sigsusp sh 88552 420574 65069 0 3 0x82 wait syz-executor 53788 438445 65069 0 3 0x82 nanoslp syz-executor 13972 97234 65069 0 3 0x82 nanoslp syz-executor 56123 130682 65069 0 3 0x82 nanoslp syz-executor 55267 193973 65069 0 3 0x82 nanoslp syz-executor 29475 510712 65069 0 3 0x82 nanoslp syz-executor 83794 341309 65069 0 3 0x82 nanoslp syz-executor 733 377843 65069 0 3 0x82 nanoslp syz-executor 65069 137757 25870 0 3 0x82 kqread syz-executor 25870 44131 59922 0 3 0x10008a sigsusp ksh 59922 120481 92888 0 3 0x98 kqread sshd-session 92888 256298 9543 0 3 0x92 kqread sshd-session 76540 386251 1 0 3 0x100083 ttyopn getty 9543 351540 1 0 3 0x88 kqread sshd 54319 183607 56538 74 3 0x1100092 bpf pflogd 56538 194709 1 0 3 0x80 sbwait pflogd 41954 2203 96179 73 3 0x1100090 kqread syslogd 96179 516519 1 0 3 0x100082 sbwait syslogd 61287 337552 1 0 3 0x100080 kqread resolvd 38888 377361 72282 77 3 0x100092 kqread dhcpleased 87271 216932 72282 77 3 0x100092 kqread dhcpleased 72282 353162 1 0 3 0x80 kqread dhcpleased 60357 465220 0 0 3 0x14200 bored smr 91672 334936 0 0 2 0x14200 zerothread 41201 23000 0 0 3 0x14200 aiodoned aiodoned 6724 388921 0 0 3 0x14200 syncer update 19013 308782 0 0 3 0x14200 cleaner cleaner 13998 474745 0 0 3 0x14200 reaper reaper 89370 462858 0 0 3 0x14200 pgdaemon pagedaemon 21837 335534 0 0 3 0x14200 bored viomb 36937 33919 0 0 3 0x40014200 acpi0 acpi0 3113 435339 0 0 7 0x40014200 idle1 62704 440326 0 0 3 0x14200 bored softnet3 9839 220780 0 0 3 0x14200 bored softnet2 45109 301902 0 0 3 0x14200 bored softnet1 9190 362477 0 0 3 0x14200 bored softnet0 27838 425059 0 0 3 0x14200 bored systqmp 85289 58064 0 0 3 0x14200 bored systq 643 95059 0 0 3 0x14200 tmoslp softclockmp 72231 285773 0 0 3 0x40014200 tmoslp softclock 70424 215742 0 0 3 0x40014200 idle0 1 299936 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 39235 (syz-executor) thread 0xffff8000ffff22a0 (314425) exclusive rwlock dtlk r = 0 (0xffffffff8384ea98) #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+0x377 sys/kern/kern_rwlock.c:310 #2 dt_ioctl_record_stop+0x68 sys/dev/dt/dt_dev.c:-1 #3 dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #3 dtclose+0x105 sys/dev/dt/dt_dev.c:232 #4 spec_close+0x45f sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x126 sys/kern/kern_descrip.c:1267 #8 closef+0x192 sys/kern/kern_descrip.c:1251 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a1a370) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 vn_closefile+0x41 sys/kern/vfs_vnops.c:608 #2 fdrop+0x126 sys/kern/kern_descrip.c:1267 #3 closef+0x192 sys/kern/kern_descrip.c:1251 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11044K 11413K 166960K 12050 0 pcb 17 14K 16K 166960K 78 0 rtable 204 7K 8K 166960K 464 0 pf 35 17K 67485K 166960K 69 0 ifaddr 40 6K 8K 166960K 58 0 ifgroup 55 2K 2K 166960K 84 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 37K 166960K 92 0 ioctlops 0 0K 4K 166960K 1600 0 iov 0 0K 12K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1400 88K 89K 166960K 1883 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 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 240K 166960K 629 0 sigio 1 0K 0K 166960K 7 0 proc 74 103K 140K 166960K 580 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 84 0 in_multi 84 6K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 482 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 251 162K 176K 166960K 7307 0 UVM aobj 44 2K 2K 166960K 45 0 pinsyscall 45 90K 104K 166960K 1710 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 38 0 NDP 12 0K 1K 166960K 36 0 temp 52 8690K 8758K 166960K 18062 0 kqueue 13 20K 27K 166960K 116 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 63 0 59 1 0 1 1 0 8 0 rtentry 176 122 0 30 6 0 6 6 0 8 0 unpcb 144 363 0 346 7 1 6 6 0 8 5 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 180 0 176 5 4 1 4 0 8 0 arp 128 20 0 2 1 0 1 1 0 8 0 inpcb 328 561 0 553 12 10 2 10 0 8 0 nd6 144 25 0 3 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 7 0 7 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 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 pfstitem 24 58 0 17 1 0 1 1 0 8 0 pfstkey 128 58 0 17 2 0 2 2 0 8 0 pfstate 384 58 0 17 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 471 0 103 30 2 28 30 0 8 2 art_table 32 473 0 104 4 0 4 4 0 8 0 art_node 16 120 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 3 2 1 1 0 8 1 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 42 0 1 2 0 2 2 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2467 0 968 95 0 95 95 0 8 0 ffsino 288 2467 0 968 109 0 109 109 0 8 0 nchpl 144 3298 0 1611 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 2897 0 0 60 0 60 60 0 8 0 vnodes 216 2897 0 0 161 0 161 161 0 8 0 namei 1024 11016 0 11016 3 2 1 1 0 8 1 percpumem 16 61 0 12 1 0 1 1 0 8 0 kstatmem 264 42 0 16 3 1 2 3 0 8 0 scxspl 216 10811 0 10811 10 2 8 8 1 8 8 plimitpl 152 175 0 158 1 0 1 1 0 8 0 sigapl 424 936 0 883 9 0 9 9 0 8 1 knotepl 120 316 0 0 10 0 10 10 0 8 0 kqueuepl 224 199 0 190 3 2 1 3 0 8 0 pipepl 336 132 0 104 3 0 3 3 0 8 0 fdescpl 520 896 0 863 3 0 3 3 0 8 0 filepl 160 4822 0 4606 16 1 15 15 0 8 5 lockfpl 104 218 0 215 1 0 1 1 0 8 0 lockfspl 48 62 0 59 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 712 0 698 1 0 1 1 0 8 0 zombiepl 144 992 0 992 3 2 1 1 0 8 1 processpl 1240 936 0 883 6 0 6 6 0 8 0 procpl 656 1703 0 1639 8 0 8 8 0 8 2 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 13 0 13 2 2 0 1 0 8 0 sockpl 728 1011 0 980 25 13 12 16 0 8 8 mcl64k 65536 2 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 86 0 0 3 0 3 3 0 8 0 mbufpl 256 254 0 0 16 0 16 16 0 8 0 bufpl 280 3289 0 124 227 0 227 227 0 8 0 anonpl 32 7659 0 0 62 0 62 62 0 246 0 amapchunkpl 152 23290 0 22777 27 2 25 27 0 158 4 amappl16 200 2310 0 2281 18 12 6 11 0 8 3 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 122 0 109 1 0 1 1 0 8 0 amappl13 176 8 0 7 1 0 1 1 0 8 0 amappl12 168 1544 0 1510 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 34 0 31 1 0 1 1 0 8 0 amappl7 128 109 0 95 1 0 1 1 0 8 0 amappl6 120 178 0 174 1 0 1 1 0 8 0 amappl5 112 123 0 114 1 0 1 1 0 8 0 amappl4 104 323 0 301 1 0 1 1 0 8 0 amappl3 96 4471 0 4351 4 0 4 4 0 8 0 amappl2 88 710 0 644 2 0 2 2 0 8 0 amappl1 80 10022 0 9381 15 0 15 15 0 8 0 amappl 88 6539 0 6367 6 1 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 44 0 1 1 0 1 1 0 8 0 uaddrrnd 24 896 0 863 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 896 0 863 1 0 1 1 0 8 0 vmmpekpl 168 8528 0 8493 2 0 2 2 0 8 0 vmmpepl 168 60720 0 58644 102 8 94 99 0 357 2 vmsppl 480 895 0 863 5 0 5 5 0 8 0 rwobjpl 72 20513 0 16582 73 1 72 72 0 8 0 pdppl 4096 1800 0 1726 108 34 74 84 0 8 0 pvpl 32 15118 0 0 122 0 122 122 0 265 0 pmappl 256 895 0 863 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 403 0 46 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff8000ffff22a0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff22a0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000313e2b40) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bd39888,81,fffffd80097fb5b0,ffff8000ffff22a0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063649bb8,ffff8000ffff22a0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063649bb8,ffff8000ffff22a0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8063649bb8,ffff8000ffff22a0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063649bb8,ffff8000ffff22a0) at closef+0x192 sys/kern/kern_descrip.c:1251 syscall(ffff8000313e2da0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000313e2da0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe64f377a2c0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x448 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x448 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5