uvm_fault(0xfffffd8069a89018, 0x4d00000056, 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 283142 93170 0 0x1000 0x4080000 1 syz-executor.3 witness_checkorder(fffffd806f0df1c0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0df1b0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021238aa8,fffffd806f0df1b0,fffffd806f0df238,7,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021238aa8,7) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021238aa8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021238aa8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021238aa8,ffff80002b3b7700,ffff80002b3b7750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002b3b77d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002b3b77d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef1e1839510, 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(0xfffffd8069a89018, 0x4d00000056, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806f0df1c0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0df1b0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021238aa8,fffffd806f0df1b0,fffffd806f0df238,7,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021238aa8,7) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021238aa8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021238aa8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021238aa8,ffff80002b3b7700,ffff80002b3b7750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002b3b77d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002b3b77d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef1e1839510, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002b3b74a0 rbx 0xe rdx 0 rcx 0xffff800021238aa8 rax 0xffffffff82b79ff0 cpu_info_full_primary+0x1ff0 r8 0x21 r9 0 r10 0xf1f676103d8aa8c7 r11 0xb65012544bde27f3 r12 0 r13 0xfffffd806f0df1c0 r14 0x4d0000004e r15 0xffff800021238aa8 rip 0xffffffff81009f9c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002b3b73f0 ss 0 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.1) pid=177227 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff8000212397f0,0xffff800021212ad0 process=0xffff80002129e5c8 user=0xffff80002b3b2000, vmspace=0xfffffd8069a89018 estcpu=34, cpticks=1, pctcpu=0.4 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79479 261693 69545 0 2 0 syz-executor.7 79479 254177 69545 0 3 0x4000080 fsleep syz-executor.7 14791 322734 93652 0 2 0 syz-executor.6 14791 335709 93652 0 3 0x4000080 fsleep syz-executor.6 3465 333451 95960 0 2 0 syz-executor.2 3465 353917 95960 0 2 0x4000480 syz-executor.2 93170 266707 86527 0 3 0x3000 suspend syz-executor.3 93170 283142 86527 0 7 0x4081000 syz-executor.3 30239 516171 79319 0 2 0 syz-executor.0 30239 157241 79319 0 2 0x4000000 syz-executor.0 31978 385211 99454 0 2 0 syz-executor.4 31978 470246 99454 0 2 0x4000480 syz-executor.4 93652 225342 17914 0 3 0x82 nanoslp syz-executor.6 69545 368134 17914 0 3 0x82 nanoslp syz-executor.7 98271 145065 17914 0 2 0x2 syz-executor.5 99454 84508 17914 0 3 0x82 nanoslp syz-executor.4 86527 523936 17914 0 3 0x82 nanoslp syz-executor.3 95960 283595 17914 0 2 0x482 syz-executor.2 40672 397394 17914 0 2 0x482 syz-executor.1 79319 431837 17914 0 3 0x82 nanoslp syz-executor.0 17914 474900 85080 0 3 0x2000082 wait syz-fuzzer 17914 179950 85080 0 3 0x6000082 nanoslp syz-fuzzer 17914 441382 85080 0 3 0x6000082 wait syz-fuzzer 17914 446530 85080 0 3 0x6000082 thrsleep syz-fuzzer 17914 92555 85080 0 3 0x6000082 thrsleep syz-fuzzer 17914 68428 85080 0 3 0x6000082 wait syz-fuzzer 17914 487141 85080 0 3 0x6000082 wait syz-fuzzer 17914 59732 85080 0 3 0x6000082 wait syz-fuzzer 17914 335287 85080 0 3 0x6000082 wait syz-fuzzer 17914 373688 85080 0 3 0x6000082 wait syz-fuzzer 17914 38965 85080 0 3 0x6000082 thrsleep syz-fuzzer 17914 297253 85080 0 3 0x6000082 wait syz-fuzzer 17914 38546 85080 0 3 0x6000082 thrsleep syz-fuzzer 17914 338712 85080 0 3 0x6000082 thrsleep syz-fuzzer 17914 350408 85080 0 3 0x6000082 thrsleep syz-fuzzer 17914 289705 85080 0 3 0x6000082 kqread syz-fuzzer 85080 249228 35859 0 3 0x10008a sigsusp ksh 35859 319058 87508 0 3 0x9a kqread sshd 31996 462541 1 0 3 0x100083 ttyin getty 87508 203629 1 0 3 0x88 kqread sshd 83284 263850 8379 74 3 0x1100092 bpf pflogd 8379 41667 1 0 3 0x80 netio pflogd 37403 114066 88353 73 3 0x1100090 kqread syslogd 88353 387624 1 0 3 0x100082 netio syslogd 42102 264791 1 0 3 0x100080 kqread resolvd 58289 204202 51395 77 3 0x100092 kqread dhcpleased 27772 306108 51395 77 3 0x100092 kqread dhcpleased 51395 136112 1 0 3 0x80 kqread dhcpleased 32256 156645 0 0 3 0x14200 bored smr 16691 376197 0 0 2 0x14200 zerothread 39619 301476 0 0 3 0x14200 aiodoned aiodoned 41491 184521 0 0 3 0x14200 syncer update 96968 196353 0 0 3 0x14200 cleaner cleaner 76696 94440 0 0 2 0x14200 reaper 58617 341724 0 0 3 0x14200 pgdaemon pagedaemon 36162 149123 0 0 3 0x14200 bored viomb 1540 54110 0 0 3 0x40014200 acpi0 acpi0 32607 267383 0 0 3 0x40014200 idle1 10745 309292 0 0 3 0x14200 bored softnet3 70 76229 0 0 3 0x14200 bored softnet2 66041 285066 0 0 3 0x14200 bored softnet1 16271 241495 0 0 3 0x14200 bored softnet0 77690 281348 0 0 3 0x14200 bored systqmp 30054 375360 0 0 3 0x14200 bored systq 56297 230011 0 0 3 0x40014200 bored softclock 23616 259134 0 0 3 0x40014200 idle0 1 163731 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82cfced8) #0 witness_lock+0x447 #1 sched_idle+0x199 sys/kern/kern_sched.c:172 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 6484K 7185K 78643K 13693 0 pcb 13 8K 8K 78643K 19 0 rtable 234 6K 6K 78643K 356 0 pf 32 9K 10K 78643K 43 0 ifaddr 45 15K 15K 78643K 47 0 ifgroup 55 2K 2K 78643K 55 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 4K 78643K 1535 0 iov 0 0K 0K 78643K 724 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1291 81K 81K 78643K 2947 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 17 61K 93K 78643K 8736 0 proc 67 91K 115K 78643K 526 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 7K 7K 78643K 99 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 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 390 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 333 81K 81K 78643K 75718 0 UVM aobj 14 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 2K 78643K 28 0 temp 35 5906K 6034K 78643K 23225 0 kqueue 15 24K 28K 78643K 434 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 37 0 34 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 270 0 255 1 0 1 1 0 8 0 syncache 304 4 0 4 1 1 0 1 0 8 0 tcpqe 32 90 0 90 1 1 0 1 0 8 0 tcpcb 808 8 0 4 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 2788 0 2768 15 10 5 8 0 8 3 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 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 27 0 25 1 0 1 1 0 8 0 pfstkey 128 27 0 25 1 0 1 1 0 8 0 pfstate 376 27 0 25 3 2 1 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 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11095 0 9649 91 0 91 91 0 8 0 ffsino 272 11095 0 9649 97 0 97 97 0 8 0 nchpl 144 26051 0 24364 65 1 64 64 0 8 0 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 64223 0 64223 2 1 1 2 0 8 1 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 61287 0 61287 10 9 1 8 1 8 1 plimitpl 152 34 0 18 1 0 1 1 0 8 0 sigapl 424 9058 0 9011 8 2 6 7 0 8 0 futexpl 64 72633 0 72631 1 0 1 1 0 8 0 knotepl 120 106 0 0 4 0 4 4 0 8 0 kqueuepl 216 1411 0 1399 1 0 1 1 0 8 0 pipepl 320 142 0 114 3 0 3 3 0 8 0 fdescpl 496 9041 0 9011 5 0 5 5 0 8 0 filepl 152 30419 0 30158 20 9 11 13 0 8 0 lockfpl 104 1558 0 1554 1 0 1 1 0 8 0 lockfspl 48 704 0 700 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 7 1 0 1 1 0 8 0 ucredpl 104 3198 0 3186 1 0 1 1 0 8 0 zombiepl 144 9012 0 9011 1 0 1 1 0 8 0 processpl 1072 9058 0 9011 4 0 4 4 0 8 0 procpl 680 18457 0 18388 18 11 7 7 0 8 1 sockpl 488 3095 0 3057 23 14 9 13 0 8 4 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 26 0 0 4 1 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 301 0 0 37 6 31 37 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 502 0 0 22 0 22 22 0 8 0 bufpl 288 12763 0 6434 453 0 453 453 0 8 0 anonpl 24 749787 0 742241 64 17 47 56 0 186 0 amapchunkpl 152 238397 0 237585 51 18 33 34 0 158 0 amappl16 200 12629 0 12489 10 2 8 8 0 8 0 amappl15 192 47 0 46 1 0 1 1 0 8 0 amappl14 184 180 0 164 2 1 1 2 0 8 0 amappl13 176 22 0 21 1 0 1 1 0 8 0 amappl12 168 9755 0 9722 4 2 2 3 0 8 0 amappl11 160 62 0 48 1 0 1 1 0 8 0 amappl10 152 23 0 12 1 0 1 1 0 8 0 amappl9 144 202 0 200 1 0 1 1 0 8 0 amappl8 136 258 0 186 3 0 3 3 0 8 0 amappl7 128 73 0 58 2 0 2 2 0 8 0 amappl6 120 235 0 216 2 1 1 2 0 8 0 amappl5 112 214 0 202 1 0 1 1 0 8 0 amappl4 104 664 0 622 3 1 2 3 0 8 0 amappl3 96 48658 0 48555 4 1 3 3 0 8 0 amappl2 88 9744 0 9674 3 1 2 3 0 8 0 amappl1 80 39137 0 38573 23 10 13 23 0 8 0 amappl 88 75169 0 74947 6 0 6 6 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 9042 0 9012 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9042 0 9012 1 0 1 1 0 8 0 vmmpekpl 168 51230 0 51178 3 0 3 3 0 8 0 vmmpepl 168 492414 0 490288 144 48 96 117 0 357 1 vmsppl 464 9041 0 9012 5 0 5 5 0 8 0 rwobjpl 56 111792 0 104584 107 5 102 102 0 8 0 pdppl 4096 18092 0 18024 428 358 70 84 0 8 2 pvpl 32 2355308 0 2341779 360 244 116 350 0 265 4 pmappl 248 9041 0 9012 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1211 0 389 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f0df1c0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0df1b0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021238aa8,fffffd806f0df1b0,fffffd806f0df238,7,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021238aa8,7) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021238aa8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021238aa8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021238aa8,ffff80002b3b7700,ffff80002b3b7750) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002b3b77d0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002b3b77d0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef1e1839510, 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(ffffffff82d8c508) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 sys/kern/kern_lock.c:147 single_thread_check_locked(ffff800021213ab0,0) at single_thread_check_locked+0x23a sys/kern/kern_sig.c:2033 userret(ffff800021213ab0) at userret+0x72 single_thread_check sys/kern/kern_sig.c:2060 [inline] userret(ffff800021213ab0) at userret+0x72 sys/kern/kern_sig.c:1970 syscall(ffff80002d5e9f00) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002d5e9f00) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a45dc45210, count: 7 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(ffffffff82d8c508) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 sys/kern/kern_lock.c:147 single_thread_check_locked(ffff800021213ab0,0) at single_thread_check_locked+0x23a sys/kern/kern_sig.c:2033 userret(ffff800021213ab0) at userret+0x72 single_thread_check sys/kern/kern_sig.c:2060 [inline] userret(ffff800021213ab0) at userret+0x72 sys/kern/kern_sig.c:1970 syscall(ffff80002d5e9f00) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002d5e9f00) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a45dc45210, count: -8