uvm_fault(0xfffffd806ef83990, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff819aaa18 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3c9020 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff819aaa18 Starting stack trace... panic(ffffffff8339ed07) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3c8f70) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001626000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003200b4e0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003200b4e0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3c9120) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f8d77c8,81,fffffd80097fb208,ffff80003200b4e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b9e4c10,ffff80003200b4e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b9e4c10,ffff80003200b4e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b9e4c10,ffff80003200b4e0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b9e4c10,ffff80003200b4e0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003200b4e0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003200b4e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003200b4e0,ffff80002a3c9490,ffff80002a3c93e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3c9490) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3c9490) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x799e4702dd10, 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 *348367 24889 0 0 0 1 syz-executor 199556 74237 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x756b9e2c0b60, 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(0xfffffd806ef83990, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x756b9e2c0b60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3e97d0 rbx 0 rdx 0 rcx 0xffff80003200a020 rax 0x2a r8 0xffff80002a3e9700 r9 0x1 r10 0xd1f1d960c0f66f5d r11 0x6980466d60ad11cb r12 0 r13 0xffffffff8139e2a8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8136f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3e9750 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=348367 pid=24889 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3c98,0xffff80003200b788 process=0xffff80002a2c0018 user=0xffff80002a3e4000, vmspace=0xfffffd800efcc7d0 estcpu=36, cpticks=7, pctcpu=0.0, user=6, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90163 161578 67987 0 2 0x100000 sh 67987 159473 72203 0 3 0x10008a sigsusp sh 47523 216232 51847 0 2 0 syz-executor 47523 299913 51847 0 3 0x4000080 fsleep syz-executor *24889 348367 54122 0 7 0 syz-executor 24889 230593 54122 0 3 0x4000080 fifow syz-executor 24889 102215 54122 0 3 0x4000080 fsleep syz-executor 72203 366872 90542 0 3 0x82 wait syz-executor 54014 520312 77488 0 3 0x80 nanoslp syz-executor 54014 495592 77488 0 3 0x4000080 kqsel syz-executor 54014 253691 77488 0 3 0x4000080 fsleep syz-executor 39847 1335 90542 0 3 0x2 biowait syz-executor 83444 435712 0 0 3 0x14200 acct acct 43312 237455 1 0 3 0x100083 ttyin getty 66806 457382 90542 0 3 0x82 nanoslp syz-executor 51847 70213 90542 0 3 0x82 nanoslp syz-executor 99571 441338 90542 0 3 0x82 nanoslp syz-executor 54122 426784 90542 0 3 0x82 nanoslp syz-executor 77488 81275 90542 0 3 0x82 nanoslp syz-executor 82012 227707 90542 0 3 0x82 wait syz-executor 738 114284 0 0 3 0x14200 bored sosplice 90542 419187 66639 0 3 0x82 kqread syz-executor 66639 156124 3008 0 3 0x10008a sigsusp ksh 3008 409349 21735 0 3 0x98 kqread sshd-session 21735 319329 94334 0 3 0x92 kqread sshd-session 94334 233947 1 0 3 0x88 kqread sshd 29918 76221 79979 74 3 0x1100092 bpf pflogd 79979 294417 1 0 3 0x80 sbwait pflogd 77724 118262 20821 73 3 0x1100090 kqread syslogd 20821 281656 1 0 3 0x100082 sbwait syslogd 56243 84473 1 0 3 0x100080 kqread resolvd 10328 185796 0 0 3 0x14200 bored smr 81541 458156 0 0 2 0x14200 zerothread 46925 330173 0 0 3 0x14200 aiodoned aiodoned 66055 335950 0 0 3 0x14200 syncer update 51787 466938 0 0 3 0x14200 cleaner cleaner 74237 199556 0 0 7 0x14200 reaper 68661 7744 0 0 3 0x14200 pgdaemon pagedaemon 98039 172542 0 0 3 0x14200 bored viomb 52294 465329 0 0 3 0x40014200 acpi0 acpi0 85372 238043 0 0 3 0x40014200 idle1 69892 466747 0 0 3 0x14200 bored softnet7 3537 153507 0 0 3 0x14200 bored softnet6 36194 458430 0 0 3 0x14200 bored softnet5 38498 155442 0 0 3 0x14200 bored softnet4 61534 407398 0 0 3 0x14200 bored softnet3 82749 242206 0 0 3 0x14200 bored softnet2 47647 361194 0 0 3 0x14200 bored softnet1 39574 295458 0 0 2 0x14200 softnet0 674 22326 0 0 2 0x40014200 systqmp 7186 29960 0 0 3 0x14200 bored systq 35487 268212 0 0 3 0x14200 tmoslp softclockmp 83173 31008 0 0 3 0x40014200 tmoslp softclock 17524 368263 0 0 3 0x40014200 idle0 1 247231 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 39847 (syz-executor) thread 0xffff80003c443780 (1335) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10252 11099K 12686K 166960K 18374 0 pcb 18 20K 36K 166960K 2097 0 rtable 201 14K 16K 166960K 1442 0 pf 40 19K 67486K 166960K 703 0 ifaddr 34 7K 9K 166960K 369 0 ifgroup 56 2K 3K 166960K 743 0 sysctl 4 1K 9K 166960K 111 0 counters 68 36K 38K 166960K 842 0 ioctlops 0 0K 8K 166960K 2952 0 iov 0 0K 32K 166960K 712 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1478 93K 94K 166960K 6320 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 9K 13K 166960K 58 0 VM map 2 1K 1K 166960K 2 0 sem 27 36K 46K 166960K 60 0 dirhash 12 2K 3K 166960K 105 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 6111 0 sigio 0 0K 0K 166960K 330 0 proc 67 83K 164K 166960K 1519 0 subproc 72 4K 4K 166960K 194 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1030 0 in_multi 57 4K 7K 166960K 417 0 ether_multi 1 0K 0K 166960K 60 0 mrt 1 0K 0K 166960K 30 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 1649 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 233 139K 174K 166960K 55388 0 UVM aobj 235 7K 7K 166960K 242 0 pinsyscall 37 74K 103K 166960K 7523 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 464 0 NDP 12 0K 2K 166960K 286 0 temp 84 8652K 8780K 166960K 355548 0 kqueue 8 14K 32K 166960K 1161 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 120 863 0 862 7 5 2 3 0 8 1 rtentry 176 511 0 447 6 1 5 5 0 8 1 unpcb 144 4261 0 4246 18 17 1 6 0 8 0 syncache 336 17 0 17 7 7 0 1 0 8 0 tcpqe 32 10 0 10 2 2 0 1 0 8 0 tcpcb 736 2222 0 2217 38 30 8 10 0 8 7 arp 128 129 0 118 1 0 1 1 0 8 0 inpcb 328 8160 0 8150 64 56 8 12 0 8 7 nd6 144 55 0 44 1 0 1 1 0 8 0 pkpcb 40 120 0 120 8 7 1 1 0 8 1 kcovpl 48 21 0 13 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 2 0 1 0 8 0 ppxss 1192 304 0 304 4 3 1 1 0 8 1 pppxif 1504 33 0 33 7 6 1 1 0 8 1 pfstscr 40 6 0 4 2 1 1 1 0 8 0 pffrag 232 51 0 42 1 0 1 1 0 482 0 pffrnode 88 28 0 21 1 0 1 1 0 8 0 pffrent 40 88 0 79 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 4 0 4 3 3 0 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 306 0 208 1 0 1 1 0 8 0 pfstkey 128 317 0 220 4 0 4 4 0 8 0 pfstate 384 310 0 214 11 0 11 11 0 8 0 pfrule 1344 46 0 41 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 5 0 1 5 1 4 5 0 8 0 art_heap4 256 1523 0 1242 48 17 31 34 0 8 7 art_table 40 1528 0 1243 6 0 6 6 0 8 1 art_node 32 507 0 452 2 0 2 2 0 8 1 sysvmsgpl 40 23 0 16 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 50 0 25 1 0 1 1 0 8 0 shmpl 112 239 0 7 7 0 7 7 0 8 0 dirhash 1024 81 0 64 3 0 3 3 0 8 0 dino2pl 256 12829 0 11298 98 1 97 97 0 8 0 ffsino 296 12829 0 11298 120 1 119 119 0 8 0 nchpl 144 21338 0 19607 65 0 65 65 0 8 0 rtmask 32 53 0 53 7 6 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 84065 0 84064 7 6 1 2 0 8 0 percpumem 16 436 0 387 1 0 1 1 0 8 0 kstatmem 264 496 0 468 4 1 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 26 0 26 7 6 1 1 0 8 1 scxspl 216 179256 0 179255 15 14 1 8 1 8 0 plimitpl 152 1732 0 1716 1 0 1 1 0 8 0 sigapl 424 6370 0 6317 7 0 7 7 0 8 0 knotepl 120 691 0 0 21 0 21 21 0 8 0 kqueuepl 224 2830 0 2822 26 21 5 5 0 8 4 pipepl 344 1119 0 1092 25 22 3 9 0 8 0 fdescpl 528 6330 0 6301 3 0 3 3 0 8 0 filepl 160 52306 0 52098 42 27 15 19 0 8 2 lockfpl 104 3384 0 3382 4 3 1 2 0 8 0 lockfspl 48 1183 0 1181 1 0 1 1 0 8 0 sessionpl 144 44 0 36 1 0 1 1 0 8 0 pgrppl 48 259 0 243 1 0 1 1 0 8 0 ucredpl 104 10854 0 10844 1 0 1 1 0 8 0 zombiepl 144 8290 0 8287 2 1 1 1 0 8 0 processpl 1248 6370 0 6317 5 0 5 5 0 8 0 procpl 664 15969 0 15911 7 0 7 7 0 8 0 sosppl 168 28 0 28 9 9 0 1 0 8 0 sockpl 752 13908 0 13882 103 93 10 21 0 8 7 mcl64k 65536 25 0 0 4 0 4 4 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 101 0 0 11 4 7 11 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 1897 0 0 118 0 118 118 0 8 0 bufpl 280 73957 0 67814 441 1 440 440 0 8 0 anonpl 32 26448 0 0 213 0 213 213 0 246 0 amapchunkpl 152 202533 0 201716 88 49 39 44 0 158 4 amappl16 200 25033 0 24341 155 99 56 59 0 8 4 amappl15 192 9 0 9 2 2 0 1 0 8 0 amappl14 184 155 0 146 1 0 1 1 0 8 0 amappl13 176 5 0 5 3 3 0 1 0 8 0 amappl12 168 7192 0 7161 3 1 2 2 0 8 0 amappl11 160 52 0 44 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 271 0 271 2 2 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 174 0 164 1 0 1 1 0 8 0 amappl6 120 307 0 302 1 0 1 1 0 8 0 amappl5 112 177 0 170 1 0 1 1 0 8 0 amappl4 104 346 0 326 1 0 1 1 0 8 0 amappl3 96 40891 0 40784 4 0 4 4 0 8 0 amappl2 88 934 0 884 2 0 2 2 0 8 0 amappl1 80 34049 0 33541 16 3 13 15 0 8 0 amappl 88 53363 0 53187 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 11 0 11 4 4 0 1 0 8 0 dma128 128 261 0 261 8 7 1 1 0 8 1 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 85 0 84 1 0 1 1 0 8 0 aobjpl 72 241 0 7 5 0 5 5 0 8 0 uaddrrnd 24 6330 0 6301 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6330 0 6301 1 0 1 1 0 8 0 vmmpekpl 168 42878 0 42814 4 0 4 4 0 8 0 vmmpepl 168 403104 0 400716 204 68 136 137 0 357 7 vmsppl 488 6329 0 6301 7 2 5 5 0 8 0 rwobjpl 80 105123 0 97475 175 11 164 166 0 8 0 pdppl 4096 12668 0 12602 133 65 68 84 0 8 2 pvpl 32 38342 0 0 310 1 309 309 0 265 0 pmappl 256 6329 0 6301 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 503 0 141 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378eff0) 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(ffffffff83891ab0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83891ab0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268450,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83891ab0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83891ab0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a2685b0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(0,ffffffff83801830) at __sanitizer_cov_trace_const_cmp4+0x1d kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(0,ffffffff83801830) at __sanitizer_cov_trace_const_cmp4+0x1d sys/dev/kcov.c:230 mtx_enter(ffffffff83801830) at mtx_enter+0x77 sys/kern/kern_lock.c:261 msleep_nsec(ffffffff83801868,ffffffff83801830,4,ffffffff83386fc2,ffffffffffffffff) at msleep_nsec+0x2d3 sys/kern/kern_synch.c:209 reaper(ffff8000ffffc538) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff8378eff0) 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(ffffffff83891ab0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83891ab0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268450,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83891ab0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83891ab0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a2685b0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_const_cmp4(0,ffffffff83801830) at __sanitizer_cov_trace_const_cmp4+0x1d kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(0,ffffffff83801830) at __sanitizer_cov_trace_const_cmp4+0x1d sys/dev/kcov.c:230 mtx_enter(ffffffff83801830) at mtx_enter+0x77 sys/kern/kern_lock.c:261 msleep_nsec(ffffffff83801868,ffffffff83801830,4,ffffffff83386fc2,ffffffffffffffff) at msleep_nsec+0x2d3 sys/kern/kern_synch.c:209 reaper(ffff8000ffffc538) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x756b9e2c0b60, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x756b9e2c0b60, count: -1