kernel: protection fault trap, code=0 Stopped at strlcpy+0x65: movb %al,0(%r15) ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace strlcpy(deadbeefdeadc1e7,ffffffff82932919,18) at strlcpy+0x65 sys/lib/libkern/strlcpy.c:35 kthread_create(ffffffff816cb080,0,0,ffffffff82932919) at kthread_create+0x83 sys/kern/kern_kthread.c:74 nfs_getset_niothreads(1) at nfs_getset_niothreads+0x177 sys/nfs/nfs_syscalls.c:700 nfs_sysctl(ffff80002f397b38,1,0,ffff80002f397b68,20000000,4,7c1cd6278b28c09d) at nfs_sysctl+0xb8 sys/nfs/nfs_vfsops.c:887 sys_sysctl(ffff80002a6799c0,ffff80002f397ca0,ffff80002f397bf0) at sys_sysctl+0x217 sys/kern/kern_sysctl.c:254 syscall(ffff80002f397ca0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0152f497d0, count: -7 ddb> show registers rdi 0 rsi 0x17 rbp 0xffff80002f3979e0 rbx 0x2 rdx 0xffff800000de1600 rcx 0x2649 __ALIGN_SIZE+0x1649 rax 0x6e r8 0x78 r9 0 r10 0xb4b87c69ea6241ea r11 0x6ef4aa164d47ab99 r12 0x16 r13 0xffffffff82932919 substchar+0x53767 r14 0xffffffff82932919 substchar+0x53767 r15 0xdeadbeefdeadc1e7 rip 0xffffffff82715dc5 strlcpy+0x65 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002f397990 ss 0x10 strlcpy+0x65: movb %al,0(%r15) ddb> show proc PROC (syz-executor.5) tid=499128 pid=99736 tcnt=4 stat=onproc flags process=8000000 proc=4000000 runpri=83, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a6787d0,0xffff80002a68a2c8 process=0xffff8000377d1508 user=0xffff80002f392000, vmspace=0xfffffd807973f030 estcpu=33, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25130 478628 22674 0 2 0x8000000 syz-executor.3 25130 509768 22674 0 2 0xc000000 syz-executor.3 71312 280669 91834 0 2 0x8000000 syz-executor.7 71312 247379 91834 0 2 0xc000000 syz-executor.7 40357 476929 61263 0 2 0x8000000 syz-executor.0 40357 76905 61263 0 3 0xc000080 fsleep syz-executor.0 87655 125548 52219 0 2 0x8000000 syz-executor.6 87655 241265 52219 0 3 0xc000080 fsleep syz-executor.6 7225 270899 41916 0 2 0x8000000 syz-executor.2 7225 336655 41916 0 3 0xc000080 fsleep syz-executor.2 97064 81657 21138 0 2 0x8000000 syz-executor.1 97064 423479 21138 0 3 0xc000080 fsleep syz-executor.1 97064 105372 21138 0 3 0xc000080 fsleep syz-executor.1 97064 34436 21138 0 3 0xc000080 fsleep syz-executor.1 99736 41456 96433 0 2 0x8000000 syz-executor.5 *99736 499128 96433 0 7 0xc000000 syz-executor.5 99736 99630 96433 0 2 0xc000000 syz-executor.5 99736 278504 96433 0 2 0xc000000 syz-executor.5 52219 263840 26310 0 2 0x8000482 syz-executor.6 41916 406508 26310 0 3 0x8000082 nanoslp syz-executor.2 5503 327034 26310 0 2 0x8000002 syz-executor.4 61263 78322 26310 0 2 0x8000482 syz-executor.0 21138 88184 26310 0 3 0x8000082 nanoslp syz-executor.1 22674 341603 26310 0 2 0x8000482 syz-executor.3 91834 484522 26310 0 2 0x8000482 syz-executor.7 96433 316772 26310 0 3 0x8000082 nanoslp syz-executor.5 86799 304595 0 0 3 0x14200 acct acct 584 353582 0 0 3 0x14200 bored sosplice 26310 306662 77179 0 3 0x1a000082 thrsleep syz-fuzzer 26310 154071 77179 0 3 0x1e000082 thrsleep syz-fuzzer 26310 25549 77179 0 3 0x1e000082 kqread syz-fuzzer 26310 224120 77179 0 3 0x1e000082 thrsleep syz-fuzzer 26310 63182 77179 0 3 0x1e000082 thrsleep syz-fuzzer 26310 109005 77179 0 3 0x1e000082 wait syz-fuzzer 26310 331377 77179 0 3 0x1e000082 wait syz-fuzzer 26310 509364 77179 0 3 0x1e000082 thrsleep syz-fuzzer 26310 361332 77179 0 3 0x1e000082 wait syz-fuzzer 26310 7239 77179 0 3 0x1e000082 wait syz-fuzzer 26310 51019 77179 0 3 0x1e000082 thrsleep syz-fuzzer 26310 277591 77179 0 3 0x1e000082 wait syz-fuzzer 26310 448790 77179 0 3 0x1e000082 wait syz-fuzzer 26310 454838 77179 0 3 0x1e000082 wait syz-fuzzer 26310 205668 77179 0 3 0x1e000082 wait syz-fuzzer 77179 105255 7772 0 3 0x810008a sigsusp ksh 7772 421899 16921 0 3 0x1800009a kqread sshd 12253 507026 1 0 3 0x18100083 ttyin getty 16921 138804 1 0 3 0x18000088 kqread sshd 78507 124125 21807 73 3 0x19100090 kqread syslogd 21807 188185 1 0 3 0x18100082 sbwait syslogd 24139 293273 1 0 3 0x18100080 kqread resolvd 6070 349872 54422 77 3 0x18100092 kqread dhcpleased 12318 185971 54422 77 3 0x18100092 kqread dhcpleased 54422 409190 1 0 3 0x18000080 kqread dhcpleased 15441 368323 0 0 3 0x14200 bored smr 67705 56355 0 0 2 0x14200 zerothread 430 519583 0 0 3 0x14200 aiodoned aiodoned 91329 254880 0 0 3 0x14200 syncer update 50376 102185 0 0 3 0x14200 cleaner cleaner 85259 418679 0 0 3 0x14200 reaper reaper 69230 446213 0 0 3 0x14200 pgdaemon pagedaemon 31917 97455 0 0 3 0x14200 bored viomb 89073 257190 0 0 3 0x40014200 acpi0 acpi0 77162 141320 0 0 3 0x14200 bored softnet3 42711 132343 0 0 3 0x14200 bored softnet2 95520 441819 0 0 3 0x14200 bored softnet1 86363 478584 0 0 3 0x14200 bored softnet0 61469 319295 0 0 3 0x14200 bored systqmp 72603 339967 0 0 3 0x14200 bored systq 40435 522670 0 0 3 0x40014200 tmoslp softclock 92402 259753 0 0 3 0x40014200 idle0 1 105065 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10169 6427K 10921K 166960K 28951 0 pcb 15 15K 17K 166960K 728 0 rtable 137 9K 12K 166960K 4024 0 pf 23 8K 10K 166960K 454 0 ifaddr 27 10K 14K 166960K 540 0 ifgroup 38 1K 2K 166960K 775 0 sysctl 4 1K 1K 166960K 18 0 counters 27 17K 17K 166960K 221 0 ioctlops 0 0K 2K 166960K 502 0 iov 0 0K 24K 166960K 723 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1496 94K 95K 166960K 9115 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 278 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 589 0 dirhash 12 2K 3K 166960K 240 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 73K 166960K 10288 0 sigio 0 0K 0K 166960K 250 0 proc 61 59K 83K 166960K 3675 0 subproc 104 6K 7K 166960K 1355 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1422 0 in_multi 44 3K 7K 166960K 1513 0 ether_multi 2 0K 0K 166960K 77 0 mrt 2 0K 0K 166960K 29 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 3509 0 pfkey data 0 0K 0K 166960K 11 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 416 364K 380K 166960K 88131 0 UVM aobj 131 6K 6K 166960K 149 0 pinsyscall 38 76K 100K 166960K 13958 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 528 0 NDP 8 0K 2K 166960K 408 0 temp 79 6804K 7440K 166960K 193094 0 kqueue 15 21K 29K 166960K 1075 0 SYN cache 2 104K 112K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1057 0 1054 3 2 1 3 0 8 0 rtentry 112 1315 0 1260 4 1 3 4 0 8 1 unpcb 144 6975 0 6962 4 3 1 4 0 8 0 syncache 336 177 0 177 2 1 1 1 0 8 1 tcpqe 32 297 0 297 2 1 1 1 0 8 1 tcpcb 808 3393 0 3375 9 6 3 9 0 8 0 arp 88 252 0 244 1 0 1 1 0 8 0 ipq 40 21 0 21 1 0 1 1 0 8 1 ipqe 40 200 0 200 1 0 1 1 0 8 1 inpcb 360 10242 0 10218 22 18 4 16 0 8 1 nd6 104 327 0 318 1 0 1 1 0 8 0 pkpcb 40 75 0 75 2 1 1 1 0 8 1 kcovpl 48 103 0 95 1 0 1 1 0 8 0 ppxss 1072 41 0 41 2 1 1 1 0 8 1 art_heap8 4096 3 0 2 2 1 1 2 0 8 0 art_heap4 256 4889 0 4653 52 30 22 30 0 8 5 art_table 32 4892 0 4655 4 0 4 4 0 8 1 art_node 16 1291 0 1241 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 29 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 580 0 570 1 0 1 1 0 8 0 shmpl 112 146 0 18 4 0 4 4 0 8 0 dirhash 1024 169 0 152 3 0 3 3 0 8 0 dino2pl 256 16365 0 14815 98 0 98 98 0 8 0 ffsino 240 16365 0 14815 92 0 92 92 0 8 0 nchpl 144 30526 0 28801 67 1 66 67 0 8 0 uvmvnodes 80 7883 0 0 161 0 161 161 0 8 0 vnodes 216 7883 0 0 438 0 438 438 0 8 0 namei 1024 103413 0 103413 5 3 2 3 0 8 2 vcpupl 2048 45 0 1 6 0 6 6 0 8 0 vmpool 664 80 0 36 4 0 4 4 0 8 0 kstatmem 264 404 0 388 2 0 2 2 0 8 0 scxspl 216 101068 0 101068 8 7 1 8 1 8 1 plimitpl 152 1533 0 1517 1 0 1 1 0 8 0 sigapl 424 10536 0 10489 10 2 8 8 0 8 2 futexpl 64 155893 0 155886 1 0 1 1 0 8 0 knotepl 120 88428 0 88337 12 9 3 11 0 8 0 kqueuepl 184 2070 0 2058 1 0 1 1 0 8 0 pipepl 288 1371 0 1343 7 4 3 7 0 8 0 fdescpl 432 10367 0 10338 4 0 4 4 0 8 0 filepl 120 60503 0 60257 13 4 9 13 0 8 0 lockfpl 104 3419 0 3417 2 1 1 2 0 8 0 lockfspl 48 1504 0 1502 1 0 1 1 0 8 0 sessionpl 144 118 0 102 1 0 1 1 0 8 0 pgrppl 48 233 0 217 1 0 1 1 0 8 0 ucredpl 104 9577 0 9565 1 0 1 1 0 8 0 zombiepl 144 10790 0 10790 1 0 1 1 0 8 1 processpl 1072 10536 0 10489 5 0 5 5 0 8 0 procpl 656 21715 0 21643 11 2 9 9 0 8 2 sosppl 168 190 0 187 1 0 1 1 0 8 0 sockpl 488 18438 0 18398 48 40 8 24 0 8 1 mcl64k 65536 367 0 367 2 1 1 1 0 8 1 mcl16k 16384 233 0 233 2 1 1 1 0 8 1 mcl12k 12288 378 0 378 2 1 1 1 0 8 1 mcl9k 9216 83 0 83 2 1 1 1 0 8 1 mcl8k 8192 774 0 774 2 1 1 1 0 8 1 mcl4k 4096 1859 0 1859 3 2 1 2 0 8 1 mcl2k2 2112 112 0 112 2 1 1 1 0 8 1 mcl2k 2048 102659 0 102591 57 40 17 32 0 8 7 mtagpl 96 1069 0 1069 4 0 4 4 0 8 4 mbufpl 256 321319 0 321185 334 306 28 69 0 8 8 bufpl 280 24658 0 16775 564 0 564 564 0 8 0 anonpl 24 1181040 0 1174932 90 29 61 90 0 188 0 amapchunkpl 152 283775 0 283082 52 19 33 49 0 158 4 amappl16 200 25526 0 25420 127 118 9 32 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 537 0 524 2 1 1 2 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 12535 0 12501 2 0 2 2 0 8 0 amappl11 160 54 0 44 1 0 1 1 0 8 0 amappl10 152 185 0 172 1 0 1 1 0 8 0 amappl9 144 168 0 168 2 1 1 1 0 8 1 amappl8 136 1251 0 1119 6 0 6 6 0 8 0 amappl7 128 109 0 94 1 0 1 1 0 8 0 amappl6 120 1840 0 1816 2 0 2 2 0 8 0 amappl5 112 686 0 674 1 0 1 1 0 8 0 amappl4 104 1366 0 1326 2 0 2 2 0 8 0 amappl3 96 54447 0 54353 3 0 3 3 0 8 0 amappl2 88 11664 0 11575 4 1 3 4 0 8 0 amappl1 80 52214 0 51716 22 10 12 22 0 8 0 amappl 88 86132 0 85908 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 72 148 0 18 3 0 3 3 0 8 0 uaddrrnd 24 10447 0 10374 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10447 0 10374 1 0 1 1 0 8 0 vmmpekpl 168 70421 0 70354 4 0 4 4 0 8 0 vmmpepl 168 648235 0 646172 117 9 108 111 0 357 5 vmsppl 344 10446 0 10374 7 0 7 7 0 8 0 rwobjpl 24 157489 0 148253 57 0 57 57 0 8 0 pdppl 4096 20900 0 20792 612 504 108 110 0 8 0 pvpl 32 3418965 0 3406761 367 234 133 367 0 265 3 pmappl 216 10446 0 10374 5 0 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1291 0 902 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace strlcpy(deadbeefdeadc1e7,ffffffff82932919,18) at strlcpy+0x65 sys/lib/libkern/strlcpy.c:35 kthread_create(ffffffff816cb080,0,0,ffffffff82932919) at kthread_create+0x83 sys/kern/kern_kthread.c:74 nfs_getset_niothreads(1) at nfs_getset_niothreads+0x177 sys/nfs/nfs_syscalls.c:700 nfs_sysctl(ffff80002f397b38,1,0,ffff80002f397b68,20000000,4,7c1cd6278b28c09d) at nfs_sysctl+0xb8 sys/nfs/nfs_vfsops.c:887 sys_sysctl(ffff80002a6799c0,ffff80002f397ca0,ffff80002f397bf0) at sys_sysctl+0x217 sys/kern/kern_sysctl.c:254 syscall(ffff80002f397ca0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0152f497d0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace strlcpy(deadbeefdeadc1e7,ffffffff82932919,18) at strlcpy+0x65 sys/lib/libkern/strlcpy.c:35 kthread_create(ffffffff816cb080,0,0,ffffffff82932919) at kthread_create+0x83 sys/kern/kern_kthread.c:74 nfs_getset_niothreads(1) at nfs_getset_niothreads+0x177 sys/nfs/nfs_syscalls.c:700 nfs_sysctl(ffff80002f397b38,1,0,ffff80002f397b68,20000000,4,7c1cd6278b28c09d) at nfs_sysctl+0xb8 sys/nfs/nfs_vfsops.c:887 sys_sysctl(ffff80002a6799c0,ffff80002f397ca0,ffff80002f397bf0) at sys_sysctl+0x217 sys/kern/kern_sysctl.c:254 syscall(ffff80002f397ca0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0152f497d0, count: -7