uvm_fault(0xfffffd806ae54590, 0x18ff000008, 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 497431 9951 0 0x14000 0x200 1 softnet0 witness_checkorder(fffffd806f0ff6d0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0ff6c0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021262ff0,fffffd806f0ff6c0,fffffd806f0ff748,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021262ff0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021262ff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021262ff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021262ff0,ffff800026f45dd0,ffff800026f45e20) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800026f45ea0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800026f45ea0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74846eee5e00, 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(0xfffffd806ae54590, 0x18ff000008, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806f0ff6d0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0ff6c0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021262ff0,fffffd806f0ff6c0,fffffd806f0ff748,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021262ff0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021262ff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021262ff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021262ff0,ffff800026f45dd0,ffff800026f45e20) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800026f45ea0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800026f45ea0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74846eee5e00, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800026f45b70 rbx 0xe rdx 0 rcx 0xffff800021262ff0 rax 0xffffffff82c05ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0x26f9addf26ac5270 r11 0x3868849fea670a66 r12 0 r13 0xfffffd806f0ff6d0 r14 0x18ff000000 r15 0xffff800021262ff0 rip 0xffffffff81ef9c8c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800026f45ac0 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.4) pid=192960 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800021262d48,0xffff800021262560 process=0xffff80002958d938 user=0xffff800026f40000, vmspace=0xfffffd806ae54590 estcpu=27, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49254 1441 97618 32767 2 0x10 syz-executor.7 33330 131305 2301 32767 2 0x10 syz-executor.3 2714 473089 50373 32767 2 0x10 syz-executor.0 2714 267120 50373 32767 3 0x4000090 fsleep syz-executor.0 45085 287226 44893 32767 2 0x10 syz-executor.2 45085 511091 44893 32767 2 0x4000010 syz-executor.2 82810 84783 77351 32767 2 0x10 syz-executor.6 82810 268536 77351 32767 3 0x4000090 fsleep syz-executor.6 50373 292203 86203 32767 3 0x90 nanoslp syz-executor.0 86203 321702 54121 0 3 0x82 wait syz-executor.0 62320 506618 20491 32767 3 0x90 piperd syz-executor.5 20491 290307 54121 0 3 0x82 wait syz-executor.5 72162 336649 0 0 2 0x14200 sosplice 97618 408876 59462 32767 3 0x90 nanoslp syz-executor.7 59462 385039 54121 0 3 0x82 wait syz-executor.7 77351 145999 73057 32767 3 0x90 nanoslp syz-executor.6 88124 143209 58983 32767 2 0x10 syz-executor.4 73057 438371 54121 0 3 0x82 wait syz-executor.6 58983 77771 54121 0 3 0x82 wait syz-executor.4 2301 383878 94795 32767 3 0x90 nanoslp syz-executor.3 44893 394223 62293 32767 3 0x90 nanoslp syz-executor.2 62293 516919 54121 0 3 0x82 wait syz-executor.2 94795 388297 54121 0 3 0x82 wait syz-executor.3 54121 275105 6746 0 3 0x2000082 wait syz-fuzzer 54121 398361 6746 0 3 0x6000082 nanoslp syz-fuzzer 54121 231150 6746 0 3 0x6000082 thrsleep syz-fuzzer 54121 194230 6746 0 3 0x6000082 wait syz-fuzzer 54121 406085 6746 0 3 0x6000082 wait syz-fuzzer 54121 406904 6746 0 3 0x6000082 wait syz-fuzzer 54121 469345 6746 0 3 0x6000082 thrsleep syz-fuzzer 54121 518822 6746 0 3 0x6000082 wait syz-fuzzer 54121 43849 6746 0 3 0x6000082 thrsleep syz-fuzzer 54121 370952 6746 0 3 0x6000082 thrsleep syz-fuzzer 54121 487792 6746 0 3 0x6000082 thrsleep syz-fuzzer 54121 421657 6746 0 3 0x6000082 wait syz-fuzzer 54121 234475 6746 0 2 0x6000082 syz-fuzzer 54121 441194 6746 0 3 0x6000082 thrsleep syz-fuzzer 54121 42810 6746 0 3 0x6000082 wait syz-fuzzer 6746 426294 74325 0 3 0x10008a sigsusp ksh 74325 59689 28204 0 3 0x9a kqread sshd 35268 300900 1 0 3 0x100083 ttyin getty 28204 412345 1 0 3 0x88 kqread sshd 50504 225222 43749 73 3 0x1100090 kqread syslogd 43749 188520 1 0 3 0x100082 netio syslogd 18778 300893 1 0 3 0x100080 kqread resolvd 53850 171977 93902 77 3 0x100092 kqread dhcpleased 73350 453155 93902 77 3 0x100092 kqread dhcpleased 93902 96998 1 0 3 0x80 kqread dhcpleased 32993 397195 0 0 3 0x14200 bored smr 9502 264816 0 0 2 0x14200 zerothread 32722 6472 0 0 3 0x14200 aiodoned aiodoned 2914 322804 0 0 3 0x14200 syncer update 31117 329520 0 0 3 0x14200 cleaner cleaner 8094 304463 0 0 2 0x14200 reaper 5484 336628 0 0 3 0x14200 pgdaemon pagedaemon 67096 216219 0 0 3 0x14200 bored viomb 19725 258842 0 0 3 0x40014200 acpi0 acpi0 48877 495836 0 0 3 0x40014200 idle1 9058 388463 0 0 3 0x14200 bored softnet3 36700 29701 0 0 3 0x14200 bored softnet2 28926 23241 0 0 3 0x14200 bored softnet1 9951 497431 0 0 7 0x14200 softnet0 29854 26249 0 0 3 0x14200 bored systqmp 15879 65045 0 0 3 0x14200 bored systq 60645 356390 0 0 3 0x40014200 bored softclock 64570 443784 0 0 3 0x40014200 idle0 1 383951 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff82cf2598) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 in_pcblookup+0x86 sys/netinet/in_pcb.c:1182 #4 tcp_input+0xa9c #5 ip_deliver+0x363 sys/netinet/ip_input.c:691 #6 ipintr+0x8d sys/netinet/ip_input.c:263 #7 if_netisr+0xfa sys/net/if.c:1063 #8 taskq_thread+0xe5 sys/kern/kern_task.c:450 #9 proc_trampoline+0x1c Process 72162 (sosplice) thread 0xffff8000211b2ff8 (336649) shared rwlock sosplice r = 0 (0xffff800000d38c70) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c Process 9951 (softnet0) thread 0xffff800021168550 (497431) exclusive rwlock netlock r = 0 (0xffffffff82b8dd00) #0 witness_lock+0x447 #1 if_netisr+0x1f sys/net/if.c:1046 #2 taskq_thread+0xe5 sys/kern/kern_task.c:450 #3 proc_trampoline+0x1c shared rwlock softnet0 r = 0 (0xffff80000002c070) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10178 6405K 6420K 78643K 11274 0 pcb 13 8K 8K 78643K 13 0 rtable 212 6K 6K 78643K 499 0 pf 27 8K 8K 78643K 39 0 ifaddr 40 14K 15K 78643K 68 0 ifgroup 46 2K 2K 78643K 70 0 counters 58 35K 35K 78643K 70 0 ioctlops 0 0K 2K 78643K 34 0 iov 0 0K 1K 78643K 4 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1356 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 22 81K 121K 78643K 339 0 proc 56 78K 103K 78643K 617 0 subproc 91 5K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 8 0 in_multi 88 6K 7K 78643K 154 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 457 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 289 71K 79K 78643K 4774 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 3 0 NDP 14 0K 2K 78643K 42 0 temp 29 5905K 5970K 78643K 4989 0 kqueue 12 18K 30K 78643K 47 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 46 0 43 1 0 1 1 0 8 0 rtentry 112 166 0 67 4 0 4 4 0 8 0 unpcb 144 57 0 44 1 0 1 1 0 8 0 syncache 304 11 0 11 2 1 1 1 0 8 1 tcpqe 32 58 0 58 2 1 1 1 0 8 1 tcpcb 808 34 0 16 2 0 2 2 0 8 0 arp 120 28 0 12 1 0 1 1 0 8 0 inpcb 368 152 0 128 3 0 3 3 0 8 0 nd6 136 39 0 18 1 0 1 1 0 8 0 kcovpl 48 13 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 675 0 264 29 0 29 29 0 8 3 art_table 32 676 0 264 4 0 4 4 0 8 0 art_node 16 165 0 75 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1637 0 201 91 0 91 91 0 8 0 ffsino 272 1637 0 201 97 0 97 97 0 8 0 nchpl 144 2079 0 446 63 0 63 63 0 8 0 uvmvnodes 80 1815 0 0 38 0 38 38 0 8 0 vnodes 216 1815 0 0 101 0 101 101 0 8 0 namei 1024 7380 0 7380 2 1 1 2 0 8 1 percpumem 16 48 0 6 1 0 1 1 0 8 0 kstatmem 264 32 0 12 2 0 2 2 0 8 0 scxspl 216 7228 0 7228 3 2 1 2 1 8 1 plimitpl 152 51 0 30 1 0 1 1 0 8 0 sigapl 424 619 0 568 8 1 7 7 0 8 0 futexpl 64 604 0 602 1 0 1 1 0 8 0 knotepl 120 104 0 0 4 0 4 4 0 8 0 kqueuepl 216 43 0 35 1 0 1 1 0 8 0 pipepl 320 187 0 162 4 0 4 4 0 8 1 fdescpl 496 601 0 568 6 0 6 6 0 8 1 filepl 152 2169 0 1947 10 0 10 10 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 28 0 13 1 0 1 1 0 8 0 pgrppl 48 28 0 13 1 0 1 1 0 8 0 ucredpl 104 96 0 79 1 0 1 1 0 8 0 zombiepl 144 569 0 568 1 0 1 1 0 8 0 processpl 1072 619 0 568 5 0 5 5 0 8 1 procpl 680 771 0 702 8 1 7 7 0 8 0 sosppl 168 6 0 1 1 0 1 1 0 8 0 sockpl 488 255 0 215 6 1 5 5 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 21 0 0 3 0 3 3 0 8 0 mcl2k 2048 256 0 0 32 0 32 32 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 343 0 0 21 0 21 21 0 8 0 bufpl 288 4274 0 147 295 0 295 295 0 8 0 anonpl 24 208787 0 203251 59 2 57 58 0 186 17 amapchunkpl 152 15547 0 14846 32 0 32 32 0 158 3 amappl16 200 5759 0 5654 8 0 8 8 0 8 1 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 172 0 157 2 0 2 2 0 8 1 amappl13 176 13 0 13 1 1 0 1 0 8 0 amappl12 168 1307 0 1272 4 1 3 3 0 8 0 amappl11 160 53 0 43 1 0 1 1 0 8 0 amappl10 152 30 0 22 1 0 1 1 0 8 0 amappl9 144 179 0 178 1 0 1 1 0 8 0 amappl8 136 195 0 151 2 0 2 2 0 8 0 amappl7 128 67 0 51 2 0 2 2 0 8 0 amappl6 120 245 0 229 2 0 2 2 0 8 1 amappl5 112 200 0 191 1 0 1 1 0 8 0 amappl4 104 572 0 536 3 0 3 3 0 8 1 amappl3 96 3598 0 3513 3 0 3 3 0 8 0 amappl2 88 811 0 741 3 0 3 3 0 8 1 amappl1 80 10869 0 10347 23 4 19 22 0 8 6 amappl 88 4261 0 4052 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 601 0 568 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 601 0 568 1 0 1 1 0 8 0 vmmpekpl 168 10506 0 10452 3 0 3 3 0 8 0 vmmpepl 168 58370 0 56344 115 3 112 112 0 357 21 vmsppl 464 600 0 568 6 0 6 6 0 8 1 rwobjpl 56 23670 0 20805 45 0 45 45 0 8 4 pdppl 4096 1210 0 1136 128 52 76 94 0 8 2 pvpl 32 461944 0 450505 362 22 340 362 0 265 238 pmappl 248 600 0 568 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 719 0 56 20 0 20 20 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f0ff6d0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f0ff6c0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021262ff0,fffffd806f0ff6c0,fffffd806f0ff748,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021262ff0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021262ff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021262ff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021262ff0,ffff800026f45dd0,ffff800026f45e20) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800026f45ea0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800026f45ea0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74846eee5e00, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82ca0020) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ca0020) at __mp_lock+0x133 sys/kern/kern_lock.c:147 if_qstart_compat(ffff8000001a0550) at if_qstart_compat+0x1e sys/net/if.c:716 ifq_serialize(ffff8000001a0550,ffff8000001a0678) at ifq_serialize+0x16e sys/net/ifq.c:113 taskq_thread(ffff80000002c000) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82ca0020) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ca0020) at __mp_lock+0x133 sys/kern/kern_lock.c:147 if_qstart_compat(ffff8000001a0550) at if_qstart_compat+0x1e sys/net/if.c:716 ifq_serialize(ffff8000001a0550,ffff8000001a0678) at ifq_serialize+0x16e sys/net/ifq.c:113 taskq_thread(ffff80000002c000) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: -8