uvm_fault(0xfffffd806efdd748, 0x8, 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 459688 91307 0 0x14000 0x200 1 reaper witness_checkorder(fffffd806ef8bbe0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef8bbd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212942c8,fffffd806ef8bbd0,fffffd806ef8bc58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212942c8,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212942c8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212942c8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212942c8,ffff8000212fb210,ffff8000212fb260) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212fb2e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212fb2e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d69f15a8490, 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(0xfffffd806efdd748, 0x8, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806ef8bbe0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef8bbd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212942c8,fffffd806ef8bbd0,fffffd806ef8bc58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212942c8,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212942c8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212942c8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212942c8,ffff8000212fb210,ffff8000212fb260) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212fb2e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212fb2e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d69f15a8490, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff8000212fafb0 rbx 0xe rdx 0 rcx 0xffff8000212942c8 rax 0xffffffff82bd4ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0x2a5e82d621fce5a r11 0x718dc4347ed70ba3 r12 0 r13 0xfffffd806ef8bbe0 r14 0 r15 0xffff8000212942c8 rip 0xffffffff8138576c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000212faf00 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.6) pid=369363 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800021295808,0xffff800021295020 process=0xffff80002128e9f8 user=0xffff8000212f6000, vmspace=0xfffffd806efdd748 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 33299 402094 34104 0 2 0 syz-executor.5 65620 429776 21437 60928 3 0x90 nanoslp syz-executor.2 65620 252699 21437 60928 3 0x4000090 fsleep syz-executor.2 65620 221749 21437 60928 3 0x4000090 fsleep syz-executor.2 65620 516261 21437 60928 3 0x4000090 fsleep syz-executor.2 38792 381215 97909 0 2 0 syz-executor.0 38792 331817 97909 0 3 0x4000080 piperd syz-executor.0 38792 227026 97909 0 3 0x4000080 fsleep syz-executor.0 73507 9719 24062 0 2 0 syz-executor.3 73507 63970 24062 0 3 0x4000080 kqpoll syz-executor.3 73507 236162 24062 0 2 0x4000000 syz-executor.3 97909 316783 52086 0 3 0x82 nanoslp syz-executor.0 63802 377151 0 0 3 0x14280 nfsidl nfsio 70099 460470 0 0 3 0x14280 nfsidl nfsio 83361 363307 0 0 3 0x14280 nfsidl nfsio 14448 371864 0 0 3 0x14280 nfsidl nfsio 66654 441830 0 0 3 0x14280 nfsidl nfsio 69412 124065 0 0 3 0x14280 nfsidl nfsio 67084 498991 0 0 3 0x14280 nfsidl nfsio 41626 363816 0 0 3 0x14280 nfsidl nfsio 54166 425528 0 0 3 0x14280 nfsidl nfsio 74306 97717 0 0 3 0x14280 nfsidl nfsio 56348 430974 0 0 3 0x14280 nfsidl nfsio 53293 484975 0 0 3 0x14280 nfsidl nfsio 41977 193649 0 0 3 0x14280 nfsidl nfsio 70955 302825 0 0 3 0x14280 nfsidl nfsio 19622 435168 0 0 3 0x14280 nfsidl nfsio 24214 290558 0 0 3 0x14280 nfsidl nfsio 12297 13544 0 0 3 0x14280 nfsidl nfsio 47772 259389 0 0 3 0x14280 nfsidl nfsio 86741 29481 0 0 3 0x14280 nfsidl nfsio 71878 138016 0 0 3 0x14280 nfsidl nfsio 321 30396 1 0 3 0x100083 ttyin getty 43771 368011 0 0 3 0x14200 bored sosplice 27952 74458 52086 0 2 0x2 syz-executor.7 18892 198526 52086 0 3 0x82 nanoslp syz-executor.6 21437 42454 52086 0 3 0x82 nanoslp syz-executor.2 34104 279882 52086 0 3 0x82 nanoslp syz-executor.5 32107 320155 52086 0 3 0x82 nanoslp syz-executor.4 49459 337241 62564 0 3 0x100082 netio arp 62564 405836 1 0 3 0x10008a sigsusp sh 24062 129626 52086 0 3 0x82 nanoslp syz-executor.3 50620 379609 52086 0 3 0x82 nanoslp syz-executor.1 52086 258457 39044 0 3 0x2000082 wait syz-fuzzer 52086 122506 39044 0 3 0x6000082 nanoslp syz-fuzzer 52086 420900 39044 0 3 0x6000082 wait syz-fuzzer 52086 58865 39044 0 3 0x6000082 wait syz-fuzzer 52086 162400 39044 0 3 0x6000082 kqread syz-fuzzer 52086 96131 39044 0 3 0x6000082 wait syz-fuzzer 52086 296388 39044 0 3 0x6000082 thrsleep syz-fuzzer 52086 438421 39044 0 3 0x6000082 wait syz-fuzzer 52086 443399 39044 0 3 0x6000082 wait syz-fuzzer 52086 226434 39044 0 3 0x6000082 thrsleep syz-fuzzer 52086 366114 39044 0 3 0x6000082 thrsleep syz-fuzzer 52086 239146 39044 0 3 0x6000082 wait syz-fuzzer 52086 445685 39044 0 3 0x6000082 thrsleep syz-fuzzer 52086 126803 39044 0 3 0x6000082 thrsleep syz-fuzzer 52086 514255 39044 0 3 0x6000082 wait syz-fuzzer 39044 338774 2953 0 3 0x10008a sigsusp ksh 2953 215729 7824 0 3 0x9a kqread sshd 7824 509594 1 0 3 0x88 kqread sshd 23007 466074 63629 74 3 0x1100092 bpf pflogd 63629 194657 1 0 3 0x80 netio pflogd 83011 488517 71435 73 3 0x1100090 kqread syslogd 71435 142261 1 0 3 0x100082 netio syslogd 32348 390511 1 0 3 0x100080 kqread resolvd 15506 349693 13575 77 3 0x100092 kqread dhcpleased 32522 281113 13575 77 3 0x100092 kqread dhcpleased 13575 238967 1 0 3 0x80 kqread dhcpleased 71486 340379 0 0 3 0x14200 bored smr 34970 4850 0 0 2 0x14200 zerothread 51676 130243 0 0 3 0x14200 aiodoned aiodoned 53868 147368 0 0 3 0x14200 syncer update 23026 187491 0 0 3 0x14200 cleaner cleaner 91307 459688 0 0 7 0x14200 reaper 8652 112576 0 0 3 0x14200 pgdaemon pagedaemon 51025 120789 0 0 3 0x14200 bored viomb 63026 32567 0 0 3 0x40014200 acpi0 acpi0 76897 371852 0 0 3 0x40014200 idle1 94070 70057 0 0 3 0x14200 bored softnet3 70887 460279 0 0 3 0x14200 bored softnet2 6157 387911 0 0 3 0x14200 bored softnet1 43890 20238 0 0 2 0x14200 softnet0 58340 492174 0 0 3 0x14200 bored systqmp 82497 197747 0 0 3 0x14200 bored systq 92264 316390 0 0 3 0x40014200 bored softclock 35669 284517 0 0 3 0x40014200 idle0 1 58482 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 10209 6617K 7194K 78643K 13777 0 pcb 15 13K 18K 78643K 1142 0 rtable 241 7K 7K 78643K 422 0 pf 35 10K 10K 78643K 59 0 ifaddr 46 15K 15K 78643K 59 0 ifgroup 60 2K 2K 78643K 83 0 sysctl 2 0K 0K 78643K 2 0 counters 62 36K 36K 78643K 72 0 ioctlops 0 0K 4K 78643K 1494 0 iov 0 0K 20K 78643K 44 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1365 85K 86K 78643K 1978 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 20 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 36 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 97K 78643K 1339 0 sigio 0 0K 0K 78643K 52 0 proc 69 91K 115K 78643K 617 0 subproc 117 7K 7K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 38 0 in_multi 99 7K 7K 78643K 117 0 ether_multi 1 0K 0K 78643K 3 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 736 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 350 86K 91K 78643K 15623 0 UVM aobj 50 6K 6K 78643K 50 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 22 0 NDP 13 0K 1K 78643K 36 0 temp 73 5916K 6035K 78643K 8030 0 kqueue 12 18K 29K 78643K 138 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 73 0 69 1 0 1 1 0 8 0 rtentry 112 127 0 15 4 0 4 4 0 8 0 unpcb 144 925 0 910 11 7 4 6 0 8 3 syncache 304 19 0 19 3 3 0 1 0 8 0 tcpqe 32 455 0 455 3 3 0 1 0 8 0 tcpcb 808 298 0 294 11 8 3 7 0 8 2 arp 120 21 0 3 1 0 1 1 0 8 0 inpcb 368 1712 0 1703 18 10 8 10 0 8 7 nd6 136 29 0 3 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 10 0 1 1 0 1 1 0 8 0 pffrag 232 5 0 4 1 0 1 1 0 482 0 pffrnode 88 5 0 4 1 0 1 1 0 8 0 pffrent 40 11 0 10 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 62 0 36 1 0 1 1 0 8 0 pfstkey 128 62 0 36 1 0 1 1 0 8 0 pfstate 376 62 0 36 5 2 3 3 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 507 0 47 29 0 29 29 0 8 0 art_table 32 508 0 47 4 0 4 4 0 8 0 art_node 16 126 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semapl 112 27 0 17 1 0 1 1 0 8 0 shmpl 112 47 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3088 0 1623 92 0 92 92 0 8 0 ffsino 272 3088 0 1623 98 0 98 98 0 8 0 nchpl 144 5060 0 3401 63 0 63 63 0 8 0 uvmvnodes 80 3713 0 0 76 0 76 76 0 8 0 vnodes 216 3713 0 0 207 0 207 207 0 8 0 namei 1024 17244 0 17244 3 2 1 2 0 8 1 percpumem 16 49 0 5 1 0 1 1 0 8 0 vmpool 696 3 0 3 1 1 0 1 0 8 0 kstatmem 264 36 0 10 2 0 2 2 0 8 0 scxspl 216 15170 0 15170 14 13 1 8 1 8 1 plimitpl 152 149 0 132 1 0 1 1 0 8 0 sigapl 424 1681 0 1611 11 2 9 9 0 8 1 futexpl 64 11065 0 11061 2 1 1 1 0 8 0 knotepl 120 123 0 0 4 0 4 4 0 8 0 kqueuepl 216 304 0 295 3 2 1 3 0 8 0 pipepl 320 523 0 490 17 11 6 8 0 8 3 fdescpl 496 1642 0 1612 5 0 5 5 0 8 0 filepl 152 10558 0 10293 34 17 17 21 0 8 6 lockfpl 104 691 0 688 2 1 1 2 0 8 0 lockfspl 48 208 0 205 1 0 1 1 0 8 0 sessionpl 144 27 0 9 1 0 1 1 0 8 0 pgrppl 48 27 0 9 1 0 1 1 0 8 0 ucredpl 104 1139 0 1123 1 0 1 1 0 8 0 zombiepl 144 1614 0 1611 2 1 1 1 0 8 0 processpl 1072 1681 0 1611 5 0 5 5 0 8 0 procpl 680 3958 0 3866 10 1 9 9 0 8 0 sosppl 168 11 0 11 3 3 0 1 0 8 0 sockpl 488 2715 0 2687 47 34 13 21 0 8 9 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 48 0 0 6 0 6 6 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 356 0 0 45 0 45 45 0 8 0 mtagpl 96 250 0 0 7 0 7 7 0 8 0 mbufpl 256 1027 0 0 60 0 60 60 0 8 0 bufpl 288 5909 0 149 412 0 412 412 0 8 0 anonpl 24 297265 0 283446 91 6 85 88 0 186 0 amapchunkpl 152 49625 0 48725 46 5 41 43 0 158 2 amappl16 200 6929 0 6576 23 4 19 22 0 8 0 amappl15 192 20 0 19 1 0 1 1 0 8 0 amappl14 184 165 0 150 2 1 1 2 0 8 0 amappl13 176 47 0 47 2 1 1 1 0 8 1 amappl12 168 2341 0 2310 4 2 2 3 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 29 0 18 1 0 1 1 0 8 0 amappl9 144 221 0 221 3 3 0 1 0 8 0 amappl8 136 237 0 171 3 0 3 3 0 8 0 amappl7 128 82 0 69 2 1 1 2 0 8 0 amappl6 120 263 0 243 3 2 1 3 0 8 0 amappl5 112 201 0 190 1 0 1 1 0 8 0 amappl4 104 623 0 578 3 1 2 3 0 8 0 amappl3 96 9952 0 9867 4 1 3 3 0 8 0 amappl2 88 1951 0 1876 3 1 2 3 0 8 0 amappl1 80 14526 0 13940 24 11 13 23 0 8 0 amappl 88 15029 0 14795 7 0 7 7 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 49 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1645 0 1615 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1645 0 1615 1 0 1 1 0 8 0 vmmpekpl 168 18640 0 18585 3 0 3 3 0 8 0 vmmpepl 168 118064 0 115748 149 41 108 126 0 357 0 vmsppl 464 1644 0 1615 5 0 5 5 0 8 0 rwobjpl 56 39372 0 34104 77 2 75 75 0 8 0 pdppl 4096 3298 0 3230 194 120 74 86 0 8 6 pvpl 32 702654 0 682806 366 140 226 365 0 265 61 pmappl 248 1644 0 1615 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 989 0 143 25 0 25 25 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806ef8bbe0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef8bbd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212942c8,fffffd806ef8bbd0,fffffd806ef8bc58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212942c8,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212942c8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212942c8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212942c8,ffff8000212fb210,ffff8000212fb260) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212fb2e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212fb2e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d69f15a8490, 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(ffffffff82cdebd8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cdebd8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b37f0) 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(ffffffff82cdebd8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cdebd8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b37f0) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -5