uvm_fault(0xfffffd806da8dcd0, 0x7, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND 450020 2527 0 0x14000 0x200 1 reaper witness_checkorder(fffffd806f1e9be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1e9bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002120d2b8,fffffd806f1e9bd0,fffffd806f1e9c58,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002120d2b8,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002120d2b8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002120d2b8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002120d2b8,ffff8000212b1310,ffff8000212b1360) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212b13e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b13e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c72a36850d0, 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(0xfffffd806da8dcd0, 0x7, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806f1e9be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1e9bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002120d2b8,fffffd806f1e9bd0,fffffd806f1e9c58,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002120d2b8,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002120d2b8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002120d2b8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002120d2b8,ffff8000212b1310,ffff8000212b1360) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212b13e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b13e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c72a36850d0, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff8000212b10b0 rbx 0xe rdx 0 rcx 0xfffffd80037e9680 rax 0xffffffff82c39ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0x3d6b4d181ccf3426 r11 0xbe5bbabd98ce3446 r12 0 r13 0xfffffd806f1e9be0 r14 0xffffffffffffffff r15 0xffff80002120d2b8 rip 0xffffffff826c515c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000212b1000 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor289034553) pid=208464 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000211f4018,0xffff80002120dd68 process=0xffff8000ffff6198 user=0xffff8000212ac000, vmspace=0xfffffd806da8dcd0 estcpu=26, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31925 402483 21469 0 2 0 syz-executor289034553 31925 480774 21469 0 2 0x4000080 syz-executor289034553 45136 393319 45373 0 2 0 syz-executor289034553 45136 522141 45373 0 3 0x4000080 fsleep syz-executor289034553 45136 208614 45373 0 3 0x4000080 fsleep syz-executor289034553 7049 244504 39300 0 2 0 syz-executor289034553 7049 106842 39300 0 3 0x4000080 fsleep syz-executor289034553 51601 287108 85644 0 2 0 syz-executor289034553 51601 12803 85644 0 3 0x4000080 fsleep syz-executor289034553 21469 317442 3765 0 3 0x80 nanoslp syz-executor289034553 37434 16204 3765 0 2 0 syz-executor289034553 45373 120939 3765 0 2 0 syz-executor289034553 40847 359322 3765 0 3 0x80 nanoslp syz-executor289034553 12783 298626 3765 0 3 0x80 nanoslp syz-executor289034553 39300 250939 3765 0 2 0 syz-executor289034553 90414 252707 3765 0 3 0x80 nanoslp syz-executor289034553 85644 173597 3765 0 2 0 syz-executor289034553 3765 263148 73763 0 3 0x82 nanoslp syz-executor289034553 73763 199380 18324 0 3 0x10008a sigsusp ksh 18324 262308 27046 0 3 0x9a kqread sshd 41773 513380 1 0 3 0x100083 ttyin getty 27046 320453 1 0 3 0x88 kqread sshd 8456 25655 742 73 3 0x1100090 kqread syslogd 742 295206 1 0 3 0x100082 netio syslogd 69011 209546 1 0 3 0x100080 kqread resolvd 2602 446862 41501 77 3 0x100092 kqread dhcpleased 49703 166338 41501 77 3 0x100092 kqread dhcpleased 41501 371883 1 0 3 0x80 kqread dhcpleased 99494 102786 0 0 3 0x14200 bored smr 35294 451728 0 0 2 0x14200 zerothread 34496 316941 0 0 3 0x14200 aiodoned aiodoned 64716 139282 0 0 3 0x14200 syncer update 8467 22778 0 0 3 0x14200 cleaner cleaner 2527 450020 0 0 7 0x14200 reaper 75037 180401 0 0 3 0x14200 pgdaemon pagedaemon 80854 121739 0 0 3 0x14200 bored viomb 24332 193000 0 0 3 0x40014200 acpi0 acpi0 70375 362384 0 0 3 0x40014200 idle1 93985 39216 0 0 3 0x14200 bored softnet3 32675 16306 0 0 3 0x14200 bored softnet2 80656 478071 0 0 3 0x14200 bored softnet1 42622 501196 0 0 3 0x14200 bored softnet0 32463 19661 0 0 3 0x14200 bored systqmp 5293 224535 0 0 3 0x14200 bored systq 54999 420302 0 0 3 0x40014200 bored softclock 31164 495922 0 0 3 0x40014200 idle0 1 385876 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10156 6389K 6420K 78643K 11234 0 pcb 13 8K 8K 78643K 13 0 rtable 58 1K 2K 78643K 110 0 pf 12 6K 6K 78643K 12 0 ifaddr 12 9K 9K 78643K 12 0 ifgroup 17 1K 1K 78643K 17 0 counters 44 33K 33K 78643K 44 0 ioctlops 0 0K 2K 78643K 21 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1181 74K 74K 78643K 1317 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 55 78K 79K 78643K 246 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 243 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 125 6K 7K 78643K 3047 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 1 5904K 5968K 78643K 3077 0 kqueue 13 20K 30K 78643K 154 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 20 0 17 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 33 0 20 1 0 1 1 0 8 0 syncache 304 5 0 5 1 0 1 1 0 8 1 tcpqe 32 81 0 81 1 1 0 1 0 8 0 tcpcb 808 140 0 132 2 0 2 2 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 288 0 275 3 0 3 3 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1422 0 37 87 0 87 87 0 8 0 ffsino 272 1422 0 37 93 0 93 93 0 8 0 nchpl 144 1606 0 47 58 0 58 58 0 8 0 uvmvnodes 80 1561 0 0 32 0 32 32 0 8 0 vnodes 216 1561 0 0 87 0 87 87 0 8 0 namei 1024 4386 0 4386 1 0 1 1 0 8 1 percpumem 16 35 0 0 1 0 1 1 0 8 0 kstatmem 264 6 0 0 1 0 1 1 0 8 0 scxspl 216 4862 0 4862 3 2 1 2 1 8 1 plimitpl 152 16 0 10 1 0 1 1 0 8 0 sigapl 424 449 0 403 6 0 6 6 0 8 0 futexpl 64 960 0 956 1 0 1 1 0 8 0 knotepl 120 49 0 0 2 0 2 2 0 8 0 kqueuepl 216 280 0 268 2 0 2 2 0 8 0 pipepl 320 217 0 214 1 0 1 1 0 8 0 fdescpl 496 432 0 406 5 1 4 4 0 8 0 filepl 152 1908 0 1842 4 0 4 4 0 8 0 lockfpl 104 263 0 258 1 0 1 1 0 8 0 lockfspl 48 134 0 129 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 407 0 403 1 0 1 1 0 8 0 processpl 1072 449 0 403 4 0 4 4 0 8 0 procpl 680 650 0 598 5 0 5 5 0 8 0 sockpl 488 341 0 312 5 0 5 5 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 262 0 0 33 0 33 33 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 274 0 0 19 1 18 18 0 8 0 bufpl 288 2475 0 88 171 0 171 171 0 8 0 anonpl 24 165300 0 163266 24 7 17 24 0 186 3 amapchunkpl 152 10161 0 9926 13 1 12 12 0 158 0 amappl16 200 4602 0 4599 5 4 1 5 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 99 0 90 1 0 1 1 0 8 0 amappl13 176 19 0 18 1 0 1 1 0 8 0 amappl12 168 921 0 904 1 0 1 1 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 17 0 17 1 0 1 1 0 8 1 amappl9 144 150 0 150 1 1 0 1 0 8 0 amappl8 136 31 0 29 1 0 1 1 0 8 0 amappl7 128 155 0 140 1 0 1 1 0 8 0 amappl6 120 138 0 125 1 0 1 1 0 8 0 amappl5 112 105 0 97 1 0 1 1 0 8 0 amappl4 104 411 0 384 1 0 1 1 0 8 0 amappl3 96 2781 0 2735 2 0 2 2 0 8 0 amappl2 88 596 0 548 2 0 2 2 0 8 0 amappl1 80 9733 0 9277 11 0 11 11 0 8 0 amappl 88 2779 0 2692 3 0 3 3 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 432 0 406 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 432 0 406 1 0 1 1 0 8 0 vmmpekpl 168 8110 0 8088 2 0 2 2 0 8 0 vmmpepl 168 37774 0 36575 58 0 58 58 0 357 0 vmsppl 464 431 0 406 5 1 4 4 0 8 0 rwobjpl 56 19770 0 17535 34 1 33 33 0 8 0 pdppl 4096 871 0 812 81 16 65 65 0 8 6 pvpl 32 266266 0 261459 52 7 45 52 0 265 3 pmappl 248 431 0 406 3 1 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 510 0 19 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f1e9be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1e9bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002120d2b8,fffffd806f1e9bd0,fffffd806f1e9c58,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002120d2b8,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002120d2b8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002120d2b8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002120d2b8,ffff8000212b1310,ffff8000212b1360) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212b13e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b13e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c72a36850d0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b3548) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b3548) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -5