kernel: page fault trap, code=10 Stopped at 0 TID PID UID PRFLAGS PFLAGS CPU COMMAND *288866 89453 0 0x8000000 0 1 syz-executor.1 77829 76520 60928 0x8000010 0x4000000 0 syz-executor.6 end trace frame: 0x0, 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: attempt to execute user address 0x0 in supervisor mode ddb{1}> trace end trace frame: 0x0, count: -1 ddb{1}> show registers rdi 0x1f98e000 rsi 0xffff80002fed0040 rbp 0 rbx 0 rdx 0x6b65c002 rcx 0 rax 0x800000006fff8001 r8 0 r9 0x1 r10 0x9f9ea2b2b201328d r11 0x910db383a2c11521 r12 0 r13 0 r14 0 r15 0 rip 0 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002f8cb2f0 ss 0 0 ddb{1}> show proc PROC (syz-executor.1) tid=288866 pid=89453 tcnt=1 stat=onproc flags process=8000000 proc=0 runpri=83, usrpri=83, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002fed19e0,0xffff80002fed0a90 process=0xffff80003318c028 user=0xffff80002f8c6000, vmspace=0xfffffd806b6536f0 estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1370 406239 80884 0 2 0x8000000 syz-executor.7 1370 304198 80884 0 3 0xc000080 fsleep syz-executor.7 12062 386948 92850 0 4 0x8082000 syz-executor.0 12062 115169 92850 0 2 0xc002000 syz-executor.0 45728 49412 1014 0 2 0x8000010 syz-executor.2 45728 424448 1014 0 3 0xc000090 fsleep syz-executor.2 79382 408045 37966 0 2 0x8000000 syz-executor.3 79382 102223 37966 0 3 0xc000080 fsleep syz-executor.3 11961 364134 97504 0 2 0x8000000 syz-executor.5 *89453 288866 1938 0 7 0x8000000 syz-executor.1 76520 174422 8842 60928 2 0x8000010 syz-executor.6 76520 77829 8842 60928 7 0xc000010 syz-executor.6 38452 130518 41894 0 2 0x8000000 syz-executor.4 38452 336945 41894 0 3 0xc000080 fsleep syz-executor.4 5870 285193 1 0 3 0x18000082 nanoslp getty 37966 48133 63933 0 2 0x8000002 syz-executor.3 92850 387146 63933 0 3 0x8000082 nanoslp syz-executor.0 1938 504470 63933 0 3 0x8000082 nanoslp syz-executor.1 8842 224647 63933 0 3 0x8000082 nanoslp syz-executor.6 18407 308953 0 0 3 0x14280 nfsidl nfsio 83112 426066 0 0 3 0x14280 nfsidl nfsio 21813 380574 0 0 3 0x14280 nfsidl nfsio 85219 431905 0 0 3 0x14280 nfsidl nfsio 47274 64425 0 0 3 0x14280 nfsidl nfsio 44952 377103 0 0 3 0x14280 nfsidl nfsio 94076 62366 0 0 3 0x14280 nfsidl nfsio 38837 331985 0 0 3 0x14280 nfsidl nfsio 81606 55419 0 0 3 0x14280 nfsidl nfsio 53069 62378 0 0 3 0x14280 nfsidl nfsio 97825 233245 0 0 3 0x14280 nfsidl nfsio 24943 384726 0 0 3 0x14280 nfsidl nfsio 67510 494863 0 0 3 0x14280 nfsidl nfsio 50212 205938 0 0 3 0x14280 nfsidl nfsio 184 168847 0 0 3 0x14280 nfsidl nfsio 76674 360194 0 0 3 0x14280 nfsidl nfsio 248 381015 0 0 3 0x14280 nfsidl nfsio 38061 182445 0 0 3 0x14280 nfsidl nfsio 96726 442357 0 0 3 0x14280 nfsidl nfsio 71389 240456 0 0 3 0x14280 nfsidl nfsio 87032 95838 0 0 3 0x14200 acct acct 1014 281583 63933 0 3 0x8000082 nanoslp syz-executor.2 63191 145250 0 0 3 0x14200 bored sosplice 80884 381880 63933 0 3 0x8000082 nanoslp syz-executor.7 90981 418528 82626 0 3 0x18100082 netio arp 82626 339312 1 0 3 0x810008a sigsusp sh 97504 423073 63933 0 2 0x8000002 syz-executor.5 41894 413358 63933 0 2 0x8000002 syz-executor.4 63933 461403 37005 0 3 0x1a000082 wait syz-fuzzer 63933 284505 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 306187 37005 0 3 0x1e000082 wait syz-fuzzer 63933 481991 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 162161 37005 0 3 0x1e000082 wait syz-fuzzer 63933 365083 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 230279 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 25569 37005 0 3 0x1e000082 wait syz-fuzzer 63933 56710 37005 0 3 0x1e000082 wait syz-fuzzer 63933 421497 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 249966 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 205988 37005 0 3 0x1e000082 wait syz-fuzzer 63933 24866 37005 0 3 0x1e000082 wait syz-fuzzer 63933 440933 37005 0 3 0x1e000082 thrsleep syz-fuzzer 63933 274108 37005 0 3 0x1e000082 wait syz-fuzzer 63933 33732 37005 0 3 0x1e000082 kqread syz-fuzzer 37005 331291 48042 0 3 0x810008a sigsusp ksh 48042 265023 59365 0 3 0x1800009a kqread sshd 59365 179671 1 0 3 0x18000088 kqread sshd 60253 325784 11049 73 3 0x19100090 kqread syslogd 11049 291695 1 0 3 0x18100082 sbwait syslogd 54599 41416 1 0 3 0x18100080 kqread resolvd 96353 101943 27210 77 3 0x18100092 kqread dhcpleased 51303 323791 27210 77 3 0x18100092 kqread dhcpleased 27210 76433 1 0 3 0x18000080 kqread dhcpleased 36151 165787 0 0 3 0x14200 bored smr 63755 25239 0 0 2 0x14200 zerothread 31596 333134 0 0 3 0x14200 aiodoned aiodoned 99482 393665 0 0 3 0x14200 syncer update 85325 55032 0 0 3 0x14200 cleaner cleaner 27311 355909 0 0 3 0x14200 reaper reaper 65718 278425 0 0 3 0x14200 pgdaemon pagedaemon 70427 128743 0 0 3 0x14200 bored viomb 50570 307932 0 0 3 0x40014200 acpi0 acpi0 81854 245010 0 0 3 0x40014200 idle1 66929 511414 0 0 3 0x14200 bored softnet3 39858 126978 0 0 3 0x14200 bored softnet2 35796 392302 0 0 3 0x14200 bored softnet1 99113 97199 0 0 3 0x14200 bored softnet0 96685 21669 0 0 3 0x14200 bored systqmp 38977 264734 0 0 3 0x14200 bored systq 25371 431488 0 0 3 0x14200 tmoslp softclockmp 78640 411433 0 0 3 0x40014200 tmoslp softclock 49640 389378 0 0 3 0x40014200 idle0 1 190416 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82df7018) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 userret+0x6c single_thread_check sys/kern/kern_sig.c:2083 [inline] #1 userret+0x6c sys/kern/kern_sig.c:2000 #2 intr_user_exit+0x3c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 6498K 6860K 166960K 12321 0 pcb 17 12K 12K 166960K 144 0 rtable 243 7K 7K 166960K 566 0 pf 32 9K 10K 166960K 76 0 ifaddr 45 15K 15K 166960K 79 0 ifgroup 57 2K 2K 166960K 112 0 sysctl 3 0K 1K 166960K 6 0 counters 66 36K 36K 166960K 94 0 ioctlops 0 0K 4K 166960K 1517 0 iov 0 0K 13K 166960K 55 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1375 86K 87K 166960K 1937 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 76 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 20 73K 89K 166960K 884 0 sigio 0 0K 0K 166960K 12 0 proc 58 79K 103K 166960K 670 0 subproc 117 7K 7K 166960K 169 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 138 0 in_multi 99 7K 7K 166960K 161 0 ether_multi 1 0K 0K 166960K 5 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 531 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 290 92K 96K 166960K 9939 0 UVM aobj 11 2K 2K 166960K 11 0 pinsyscall 41 82K 100K 166960K 2139 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 54 0 NDP 12 0K 1K 166960K 50 0 temp 74 6820K 7316K 166960K 14944 0 kqueue 12 18K 28K 166960K 121 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 99 0 94 1 0 1 1 0 8 0 rtentry 112 179 0 67 4 0 4 4 0 8 0 unpcb 144 622 0 608 3 1 2 2 0 8 1 syncache 336 6 0 6 3 3 0 1 0 8 0 tcpqe 32 130 0 130 2 2 0 1 0 8 0 tcpcb 808 207 0 200 6 4 2 2 0 8 1 arp 120 30 0 12 1 0 1 1 0 8 0 inpcb 384 852 0 839 6 4 2 3 0 8 0 nd6 136 43 0 13 2 0 2 2 0 8 0 pkpcb 40 7 0 7 2 2 0 1 0 8 0 kcovpl 48 13 0 4 1 0 1 1 0 8 0 ppxss 1168 3 0 3 3 2 1 1 0 8 1 pffrag 232 8 0 3 1 0 1 1 0 482 0 pffrnode 88 7 0 3 1 0 1 1 0 8 0 pffrent 40 138 0 133 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 76 0 30 1 0 1 1 0 8 0 pfstkey 128 76 0 30 2 0 2 2 0 8 0 pfstate 376 76 0 30 5 0 5 5 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 256 667 0 201 30 0 30 30 0 8 0 art_table 32 668 0 201 4 0 4 4 0 8 0 art_node 16 176 0 75 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 3 2 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2864 0 1348 96 0 96 96 0 8 0 ffsino 272 2864 0 1348 102 0 102 102 0 8 0 nchpl 144 4294 0 2560 67 0 67 67 0 8 0 uvmvnodes 80 3332 0 0 68 0 68 68 0 8 0 vnodes 216 3332 0 0 186 0 186 186 0 8 0 namei 1024 14592 0 14592 4 3 1 2 0 8 1 percpumem 16 61 0 14 1 0 1 1 0 8 0 vcpupl 3904 3 0 1 1 0 1 1 0 8 0 vmpool 696 8 0 6 1 0 1 1 0 8 0 kstatmem 264 52 0 28 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 21889 0 21889 13 12 1 8 1 8 1 plimitpl 152 183 0 167 1 0 1 1 0 8 0 sigapl 424 1198 0 1127 9 0 9 9 0 8 0 futexpl 64 12322 0 12318 1 0 1 1 0 8 0 knotepl 120 375 0 0 11 0 11 11 0 8 0 kqueuepl 216 221 0 213 1 0 1 1 0 8 0 pipepl 320 222 0 191 3 0 3 3 0 8 0 fdescpl 496 1157 0 1126 7 2 5 5 0 8 0 filepl 152 6836 0 6574 13 1 12 12 0 8 0 lockfpl 104 244 0 242 1 0 1 1 0 8 0 lockfspl 48 104 0 102 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 104 1097 0 1084 1 0 1 1 0 8 0 zombiepl 144 1127 0 1127 2 1 1 1 0 8 1 processpl 1136 1198 0 1127 6 0 6 6 0 8 0 procpl 656 2091 0 1999 9 0 9 9 0 8 0 srpgc 96 5 0 5 1 1 0 1 0 8 0 sosppl 168 7 0 7 2 2 0 1 0 8 0 sockpl 664 1594 0 1562 8 4 4 5 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 364 0 0 46 0 46 46 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 1012 0 0 62 0 62 62 0 8 0 bufpl 280 6817 0 562 447 0 447 447 0 8 0 anonpl 24 290602 0 284750 91 42 49 63 0 186 8 amapchunkpl 152 33234 0 32533 52 22 30 42 0 158 0 amappl16 200 7317 0 7197 21 12 9 19 0 8 0 amappl15 192 40 0 38 1 0 1 1 0 8 0 amappl14 184 167 0 156 2 1 1 2 0 8 0 amappl13 176 16 0 16 1 1 0 1 0 8 0 amappl12 168 1887 0 1853 2 0 2 2 0 8 0 amappl11 160 83 0 73 1 0 1 1 0 8 0 amappl10 152 44 0 36 1 0 1 1 0 8 0 amappl9 144 233 0 233 2 2 0 1 0 8 0 amappl8 136 154 0 119 2 0 2 2 0 8 0 amappl7 128 55 0 42 1 0 1 1 0 8 0 amappl6 120 395 0 378 2 1 1 2 0 8 0 amappl5 112 182 0 170 1 0 1 1 0 8 0 amappl4 104 568 0 534 2 1 1 2 0 8 0 amappl3 96 6457 0 6369 3 0 3 3 0 8 0 amappl2 88 1586 0 1510 4 2 2 4 0 8 0 amappl1 80 12114 0 11592 25 13 12 22 0 8 0 amappl 88 9324 0 9119 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1165 0 1132 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1165 0 1132 1 0 1 1 0 8 0 vmmpekpl 168 12397 0 12316 4 0 4 4 0 8 0 vmmpepl 168 90586 0 88590 130 31 99 114 0 357 8 vmsppl 440 1164 0 1132 4 0 4 4 0 8 0 rwobjpl 56 32085 0 27628 70 7 63 63 0 8 0 pdppl 4096 2337 0 2266 127 56 71 77 0 8 0 pvpl 32 47353 0 0 383 1 382 382 0 265 0 pmappl 248 1164 0 1132 5 2 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 490 0 70 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82cf6ff0) 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+0x33 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158 __mp_lock(ffffffff82df6e10) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82df6e10) at __mp_lock+0x133 sys/kern/kern_lock.c:147 preempt() at preempt+0x3a sys/kern/sched_bsd.c:340 ast(ffff8000331a9000) at ast+0x10b mi_ast sys/sys/syscall_mi.h:262 [inline] ast(ffff8000331a9000) at ast+0x10b sys/arch/amd64/amd64/trap.c:541 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x8b758d9e5a0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff82cf6ff0) 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+0x33 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158 __mp_lock(ffffffff82df6e10) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82df6e10) at __mp_lock+0x133 sys/kern/kern_lock.c:147 preempt() at preempt+0x3a sys/kern/sched_bsd.c:340 ast(ffff8000331a9000) at ast+0x10b mi_ast sys/sys/syscall_mi.h:262 [inline] ast(ffff8000331a9000) at ast+0x10b sys/arch/amd64/amd64/trap.c:541 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x8b758d9e5a0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at 0end trace frame: 0x0, count: 14 ddb{1}> trace end trace frame: 0x0, count: -1