kernel: protection fault trap, code=0 Stopped at lf_advlock+0x2f1: incl 0x28(%r12) ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace lf_advlock(ffff800001690820,0,fffffd806cfe20f8,8,ffff80002f0afad0,30) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001690820,0,fffffd806cfe20f8,8,ffff80002f0afad0,30) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806cc752e8,fffffd806cfe20f8,8,ffff80002f0afad0,30) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 doopenat(ffff80002f0b0d10,ffffff9c,200000000040,e8,0,0,4cf02f04fc712768) at doopenat+0x66b sys/kern/vfs_syscalls.c:1195 sys_openat(ffff80002f0b0d10,ffff80002f0afcc0,ffff80002f0afc10) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1100 syscall(ffff80002f0afcc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f0afcc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd312a3598b0, count: -6 ddb> show registers rdi 0xffff80003a8dc000 rsi 0x5cd rbp 0xffff80002f0af8c0 rbx 0 rdx 0xffff80003a8dc000 rcx 0x5cc rax 0xffffffff81ae0531 rw_assert_wrlock+0xa1 r8 0xa0 r9 0 r10 0xfb0deb4af9535ad3 r11 0xb4e9f8a5f88afd94 r12 0xdeadbeefdeadbeef r13 0x8 r14 0xffff80002f0afad0 r15 0x1 rip 0xffffffff823c2011 lf_advlock+0x2f1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002f0af830 ss 0 lf_advlock+0x2f1: incl 0x28(%r12) ddb> show proc PROC (syz-executor) tid=243287 pid=6274 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a8a34e8,0xffff80002a8a2568 process=0xffff8000ffff8498 user=0xffff80002f0aa000, vmspace=0xfffffd806cabd740 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 87829 44410 36364 -1 2 0x10 syz-executor 87829 324653 36364 -1 2 0x4000010 syz-executor 6274 123084 7142 -1 2 0x10 syz-executor 6274 443865 7142 -1 3 0x4000090 sbwait syz-executor * 6274 243287 7142 -1 7 0x4000010 syz-executor 6274 354612 7142 -1 3 0x4000090 fsleep syz-executor 6110 478681 63265 0 2 0xc80 syz-executor 6110 264078 63265 0 3 0x4000080 sbwait syz-executor 6110 473963 63265 0 3 0x4000080 fsleep syz-executor 6110 132767 63265 0 3 0x4000080 fsleep syz-executor 21168 101351 80585 0 2 0xc90 syz-executor 21168 440192 80585 0 3 0x4000090 kqsel syz-executor 21168 135291 80585 0 3 0x4000090 fsleep syz-executor 7142 502494 83497 0 2 0xc82 syz-executor 1768 185448 0 0 3 0x14200 acct acct 36364 478157 83497 0 3 0x82 nanoslp syz-executor 84977 11340 83497 0 2 0x2 syz-executor 80585 103201 83497 0 2 0xc82 syz-executor 41994 151864 83497 0 2 0xc82 syz-executor 63265 256724 83497 0 2 0xc82 syz-executor 8828 449348 83497 0 2 0xc82 syz-executor 32368 313389 83497 0 2 0x2 syz-executor 83497 390046 10558 0 3 0x82 kqread syz-executor 10558 311098 80932 0 3 0x10008a sigsusp ksh 80932 114397 80218 0 3 0x98 kqread sshd-session 80218 189792 90388 0 3 0x92 kqread sshd-session 17515 367638 1 0 3 0x100083 ttyin getty 90388 208647 1 0 3 0x88 kqread sshd 51491 166636 46161 73 3 0x1100090 kqread syslogd 46161 500032 1 0 3 0x100082 sbwait syslogd 15452 394080 1 0 3 0x100080 kqread resolvd 6525 517238 61314 77 3 0x100092 kqread dhcpleased 78593 109105 61314 77 3 0x100092 kqread dhcpleased 61314 509260 1 0 3 0x80 kqread dhcpleased 65090 8433 0 0 3 0x14200 bored smr 53832 240099 0 0 2 0x14200 zerothread 36965 221575 0 0 3 0x14200 aiodoned aiodoned 59601 53015 0 0 3 0x14200 syncer update 77642 72812 0 0 3 0x14200 cleaner cleaner 69554 197250 0 0 3 0x14200 reaper reaper 81633 483823 0 0 3 0x14200 pgdaemon pagedaemon 37836 40491 0 0 3 0x14200 bored viomb 45759 60031 0 0 3 0x40014200 acpi0 acpi0 59483 256319 0 0 3 0x14200 bored softnet0 99139 57266 0 0 3 0x14200 bored systqmp 53326 280853 0 0 3 0x14200 bored systq 46703 135676 0 0 2 0x40014200 softclock 42628 91204 0 0 3 0x40014200 idle0 1 155511 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11045 12171K 12302K 166960K 12418 0 pcb 17 12K 12K 166960K 62 0 rtable 206 14K 15K 166960K 644 0 pf 31 13K 18K 166960K 64 0 ifaddr 35 5K 7K 166960K 56 0 ifgroup 50 2K 2K 166960K 73 0 sysctl 3 1K 9K 166960K 8 0 counters 33 17K 17K 166960K 40 0 ioctlops 0 0K 4K 166960K 160 0 iov 0 0K 12K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1322 83K 83K 166960K 1646 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 46 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 93K 166960K 406 0 sigio 0 0K 0K 166960K 4 0 proc 66 75K 116K 166960K 597 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 51 0 in_multi 73 5K 7K 166960K 126 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 392 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 207 150K 165K 166960K 5260 0 UVM aobj 12 2K 2K 166960K 12 0 pinsyscall 37 74K 94K 166960K 1513 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 11 0 NDP 11 0K 2K 166960K 36 0 temp 74 9115K 9179K 166960K 14597 0 kqueue 15 22K 28K 166960K 62 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 88 0 85 2 1 1 2 0 8 0 rtentry 136 190 0 105 4 0 4 4 0 8 0 unpcb 144 148 0 128 2 1 1 2 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 98 0 94 4 3 1 4 0 8 0 arp 96 20 0 6 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 5 0 2 1 0 1 1 0 8 0 inpcb 328 334 0 326 4 3 1 4 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 112 29 0 12 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 3 0 3 1 1 0 1 0 8 0 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 2 1 1 0 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 6 0 6 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 532 0 150 31 6 25 31 0 8 0 art_table 40 533 0 150 5 0 5 5 0 8 0 art_node 32 190 0 112 2 1 1 2 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 64 44 0 34 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2118 0 656 92 0 92 92 0 8 0 ffsino 256 2118 0 656 92 0 92 92 0 8 0 nchpl 144 2781 0 1081 64 0 64 64 0 8 0 vnodes 216 2339 0 0 130 0 130 130 0 8 0 namei 1024 9186 0 9183 2 1 1 2 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 37 0 14 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 9048 0 9048 8 7 1 8 1 8 1 plimitpl 152 91 0 73 1 0 1 1 0 8 0 sigapl 424 696 0 654 6 1 5 6 0 8 0 knotepl 120 13567 0 13518 10 8 2 10 0 8 0 kqueuepl 184 85 0 73 1 0 1 1 0 8 0 pipepl 304 136 0 109 3 0 3 3 0 8 0 fdescpl 448 681 0 653 5 1 4 5 0 8 0 filepl 120 3340 0 3116 10 2 8 9 0 8 0 lockfpl 104 87 0 85 1 0 1 1 0 8 0 lockfspl 48 38 0 36 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 48 0 31 1 0 1 1 0 8 0 ucredpl 104 600 0 583 1 0 1 1 0 8 0 zombiepl 144 660 0 658 2 1 1 1 0 8 0 processpl 1152 696 0 654 4 0 4 4 0 8 0 procpl 664 1069 0 1018 6 0 6 6 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 552 582 0 551 6 3 3 6 0 8 0 mcl64k 65536 85 0 84 1 0 1 1 0 8 0 mcl16k 16384 6 0 6 1 1 0 1 0 8 0 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 2856 0 2801 14 6 8 14 0 8 0 mcl2k 2048 419 0 416 1 0 1 1 0 8 0 mtagpl 96 5 0 5 1 1 0 1 0 8 0 mbufpl 256 7961 0 7821 17 6 11 17 0 8 0 bufpl 280 2961 0 102 205 0 205 205 0 8 0 anonpl 24 136935 0 133768 59 35 24 59 0 186 0 amapchunkpl 152 16789 0 16361 32 12 20 31 0 158 1 amappl16 200 2576 0 2546 16 13 3 16 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 469 0 468 1 0 1 1 0 8 0 amappl13 176 114 0 104 1 0 1 1 0 8 0 amappl12 168 922 0 895 2 0 2 2 0 8 0 amappl11 160 22 0 22 1 1 0 1 0 8 0 amappl10 152 92 0 82 1 0 1 1 0 8 0 amappl9 144 261 0 261 1 1 0 1 0 8 0 amappl8 136 117 0 115 1 0 1 1 0 8 0 amappl7 128 153 0 142 1 0 1 1 0 8 0 amappl6 120 189 0 187 1 0 1 1 0 8 0 amappl5 112 86 0 78 1 0 1 1 0 8 0 amappl4 104 261 0 242 1 0 1 1 0 8 0 amappl3 96 3091 0 2992 4 1 3 4 0 8 0 amappl2 88 511 0 457 2 0 2 2 0 8 0 amappl1 80 10264 0 9713 14 2 12 14 0 8 0 amappl 88 4523 0 4378 4 0 4 4 0 92 0 uvmvnodes 80 108 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 dma64 64 7 0 7 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 681 0 653 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 681 0 653 1 0 1 1 0 8 0 vmmpekpl 168 6827 0 6786 3 0 3 3 0 8 0 vmmpepl 168 50657 0 48921 94 12 82 92 0 357 0 vmsppl 368 680 0 653 4 1 3 4 0 8 0 rwobjpl 40 16741 0 15786 13 2 11 13 0 8 0 pdppl 4096 1368 0 1306 110 44 66 80 0 8 4 pvpl 32 332780 0 323975 138 56 82 137 0 265 0 pmappl 216 680 0 653 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 385 0 74 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace lf_advlock(ffff800001690820,0,fffffd806cfe20f8,8,ffff80002f0afad0,30) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001690820,0,fffffd806cfe20f8,8,ffff80002f0afad0,30) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806cc752e8,fffffd806cfe20f8,8,ffff80002f0afad0,30) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 doopenat(ffff80002f0b0d10,ffffff9c,200000000040,e8,0,0,4cf02f04fc712768) at doopenat+0x66b sys/kern/vfs_syscalls.c:1195 sys_openat(ffff80002f0b0d10,ffff80002f0afcc0,ffff80002f0afc10) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1100 syscall(ffff80002f0afcc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f0afcc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd312a3598b0, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace lf_advlock(ffff800001690820,0,fffffd806cfe20f8,8,ffff80002f0afad0,30) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001690820,0,fffffd806cfe20f8,8,ffff80002f0afad0,30) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806cc752e8,fffffd806cfe20f8,8,ffff80002f0afad0,30) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 doopenat(ffff80002f0b0d10,ffffff9c,200000000040,e8,0,0,4cf02f04fc712768) at doopenat+0x66b sys/kern/vfs_syscalls.c:1195 sys_openat(ffff80002f0b0d10,ffff80002f0afcc0,ffff80002f0afc10) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1100 syscall(ffff80002f0afcc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f0afcc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd312a3598b0, count: -6