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(ffff80000002a560,0,fffffd800e16ea60,8,ffff80003c930e40,20) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff80000002a560,0,fffffd800e16ea60,8,ffff80003c930e40,20) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806c80c6e0,fffffd800e16ea60,8,ffff80003c930e40,20) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 doopenat(ffff80002f0c1240,ffffff9c,200000000080,fdc52675,0,0,15743b06fde527b0) at doopenat+0x66b sys/kern/vfs_syscalls.c:1189 sys_open(ffff80002f0c1240,ffff80003c931030,ffff80003c930f80) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80003c931030) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931030) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x69998e8370, count: -6 ddb> show registers rdi 0xffff80002a8b4000 rsi 0x296 rbp 0xffff80003c930c30 rbx 0 rdx 0xffff80002a8b4000 rcx 0x295 rax 0xffffffff825b3321 rw_assert_wrlock+0xa1 r8 0xa0 r9 0 r10 0x2bb49346c51c40f1 r11 0x1a1b97939d407a3 r12 0xdead4110dead4110 r13 0x8 r14 0xffff80003c930e40 r15 0x1 rip 0xffffffff82956431 lf_advlock+0x2f1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c930ba0 ss 0x10 lf_advlock+0x2f1: incl 0x28(%r12) ddb> show proc PROC (syz-executor) tid=306007 pid=94712 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f0c14d8,0xffff80002f0c07f0 process=0xffff8000ffff8d98 user=0xffff80003c92c000, vmspace=0xfffffd806cb0ed00 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 13077 125268 99963 0 2 0x2 syz-executor 535 141027 84031 0 2 0 syz-executor 535 461316 84031 0 3 0x4000080 fsleep syz-executor 84350 440583 76221 0 2 0 syz-executor 53943 304440 7869 0 2 0 syz-executor 53943 105311 7869 0 2 0x4000000 syz-executor 94712 89242 8134 0 2 0 syz-executor *94712 306007 8134 0 7 0x4000000 syz-executor 77026 424723 1 0 2 0 syz-executor 77026 175122 1 0 3 0x4000080 fsleep syz-executor 84031 231965 99963 0 2 0xc82 syz-executor 73399 485229 99963 0 2 0x10000082 syz-executor 7869 267799 99963 0 3 0x82 nanoslp syz-executor 68828 136984 99963 0 2 0x2 syz-executor 76221 42677 99963 0 2 0xc82 syz-executor 32307 153161 99963 0 3 0x82 nanoslp syz-executor 8134 395491 99963 0 2 0xc82 syz-executor 99963 428739 57554 0 3 0x82 kqread syz-executor 57554 241330 22588 0 3 0x10008a sigsusp ksh 22588 419746 22014 0 3 0x98 kqread sshd-session 22014 92531 48387 0 3 0x92 kqread sshd-session 37636 11097 1 0 3 0x100083 ttyin getty 48387 390061 1 0 3 0x88 kqread sshd 82335 60336 58660 73 3 0x1100090 kqread syslogd 58660 310624 1 0 3 0x100082 sbwait syslogd 999 31215 1 0 3 0x100080 kqread resolvd 85416 74865 16384 77 3 0x100092 kqread dhcpleased 26606 450172 16384 77 3 0x100092 kqread dhcpleased 16384 60915 1 0 3 0x80 kqread dhcpleased 72212 210885 0 0 3 0x14200 bored smr 11395 455581 0 0 2 0x14200 zerothread 25502 121027 0 0 3 0x14200 aiodoned aiodoned 80413 49575 0 0 3 0x14200 syncer update 77122 380416 0 0 3 0x14200 cleaner cleaner 27424 275895 0 0 3 0x14200 reaper reaper 60573 25185 0 0 3 0x14200 pgdaemon pagedaemon 8465 67800 0 0 3 0x14200 bored viomb 93286 151164 0 0 3 0x40014200 acpi0 acpi0 76299 171402 0 0 3 0x14200 bored softnet0 11500 293780 0 0 3 0x14200 smrbar systqmp 37247 132601 0 0 3 0x14200 bored systq 46017 428705 0 0 3 0x40014200 tmoslp softclock 43609 97130 0 0 3 0x40014200 idle0 1 308091 0 0 3 0x82 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 11048 12103K 12303K 166960K 12345 0 pcb 17 14K 15K 166960K 70 0 rtable 242 7K 9K 166960K 386 0 pf 35 14K 17K 166960K 65 0 ifaddr 42 7K 7K 166960K 53 0 ifgroup 50 2K 2K 166960K 66 0 sysctl 4 1K 9K 166960K 8 0 counters 33 17K 18K 166960K 42 0 ioctlops 0 0K 4K 166960K 76 0 iov 0 0K 4K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1307 82K 82K 166960K 1608 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 16 0 dirhash 15 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 54K 93K 166960K 360 0 sigio 0 0K 0K 166960K 1 0 proc 59 59K 91K 166960K 528 0 subproc 72 4K 5K 166960K 100 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 26 0 in_multi 99 7K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 139 625K 625K 166960K 139 0 exec 0 0K 1K 166960K 446 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 205 158K 167K 166960K 4882 0 UVM aobj 11 2K 2K 166960K 11 0 pinsyscall 37 74K 94K 166960K 1446 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 11 0K 2K 166960K 34 0 temp 43 9068K 9133K 166960K 9945 0 kqueue 13 20K 26K 166960K 59 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 90 0 87 2 0 2 2 0 8 1 rtentry 136 116 0 6 4 0 4 4 0 8 0 unpcb 144 149 0 132 2 0 2 2 0 8 1 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 57 0 52 1 0 1 1 0 8 0 arp 96 19 0 1 1 0 1 1 0 8 0 inpcb 328 267 0 258 8 1 7 7 0 8 5 nd6 112 26 0 1 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1072 8 0 8 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 6 0 5 1 0 1 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 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 6 2 1 1 1 0 8 0 pfstate 384 4 0 3 2 1 1 1 0 8 0 pfrule 1360 6 0 4 1 0 1 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 256 476 0 13 30 0 30 30 0 8 0 art_table 40 477 0 13 5 0 5 5 0 8 0 art_node 32 116 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 68 0 66 1 0 1 1 0 8 0 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 2 3 0 3 3 0 8 0 dino2pl 256 2019 0 558 92 0 92 92 0 8 0 ffsino 256 2019 0 558 92 0 92 92 0 8 0 nchpl 144 2523 0 826 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2222 0 0 124 0 124 124 0 8 0 namei 1024 8120 0 8119 1 0 1 1 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 6 0 6 1 0 1 1 0 8 1 scxspl 216 8172 0 8172 3 2 1 3 1 8 1 plimitpl 152 97 0 80 1 0 1 1 0 8 0 sigapl 424 645 0 603 6 1 5 6 0 8 0 knotepl 120 19539 0 19492 18 8 10 10 0 8 8 kqueuepl 184 76 0 67 1 0 1 1 0 8 0 pipepl 304 145 0 117 3 0 3 3 0 8 0 fdescpl 448 632 0 604 5 1 4 5 0 8 0 filepl 120 3171 0 2955 11 1 10 10 0 8 2 lockfpl 104 104 0 102 1 0 1 1 0 8 0 lockfspl 48 48 0 46 1 0 1 1 0 8 0 sessionpl 144 29 0 19 1 0 1 1 0 8 0 pgrppl 48 43 0 24 1 0 1 1 0 8 0 ucredpl 104 579 0 568 1 0 1 1 0 8 0 zombiepl 144 730 0 728 2 1 1 1 0 8 0 processpl 1152 645 0 603 4 0 4 4 0 8 0 procpl 664 1016 0 969 6 0 6 6 0 8 1 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 513 0 484 7 0 7 7 0 8 4 mcl64k 65536 13 0 13 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 2797 0 2743 15 7 8 15 0 8 0 mcl2k 2048 338 0 335 5 3 2 3 0 8 0 mtagpl 96 6 0 5 2 1 1 1 0 8 0 mbufpl 256 6620 0 6464 20 0 20 20 0 8 6 bufpl 280 2800 0 104 193 0 193 193 0 8 0 anonpl 24 124527 0 121460 39 6 33 33 0 187 7 amapchunkpl 152 15028 0 14621 30 4 26 26 0 158 6 amappl16 200 2344 0 2318 7 3 4 5 0 8 1 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 473 0 472 1 0 1 1 0 8 0 amappl13 176 116 0 106 1 0 1 1 0 8 0 amappl12 168 870 0 844 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 57 0 47 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 102 0 100 1 0 1 1 0 8 0 amappl7 128 143 0 132 1 0 1 1 0 8 0 amappl6 120 151 0 150 1 0 1 1 0 8 0 amappl5 112 87 0 78 1 0 1 1 0 8 0 amappl4 104 270 0 254 1 0 1 1 0 8 0 amappl3 96 2822 0 2728 4 0 4 4 0 8 0 amappl2 88 509 0 450 2 0 2 2 0 8 0 amappl1 80 9849 0 9299 13 1 12 13 0 8 0 amappl 88 4170 0 4028 4 0 4 4 0 92 0 uvmvnodes 80 104 0 0 3 0 3 3 0 8 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 128 256 0 256 2 1 1 1 0 8 1 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 24 632 0 604 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 632 0 604 1 0 1 1 0 8 0 vmmpekpl 168 6663 0 6625 2 0 2 2 0 8 0 vmmpepl 168 47522 0 45831 84 1 83 83 0 357 1 vmsppl 368 631 0 604 4 1 3 4 0 8 0 rwobjpl 40 15977 0 15023 12 1 11 11 0 8 0 pdppl 4096 1270 0 1208 102 36 66 80 0 8 4 pvpl 32 302564 0 294368 115 13 102 102 0 265 19 pmappl 216 631 0 604 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 382 0 53 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace lf_advlock(ffff80000002a560,0,fffffd800e16ea60,8,ffff80003c930e40,20) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff80000002a560,0,fffffd800e16ea60,8,ffff80003c930e40,20) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806c80c6e0,fffffd800e16ea60,8,ffff80003c930e40,20) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 doopenat(ffff80002f0c1240,ffffff9c,200000000080,fdc52675,0,0,15743b06fde527b0) at doopenat+0x66b sys/kern/vfs_syscalls.c:1189 sys_open(ffff80002f0c1240,ffff80003c931030,ffff80003c930f80) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80003c931030) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931030) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x69998e8370, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace lf_advlock(ffff80000002a560,0,fffffd800e16ea60,8,ffff80003c930e40,20) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff80000002a560,0,fffffd800e16ea60,8,ffff80003c930e40,20) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806c80c6e0,fffffd800e16ea60,8,ffff80003c930e40,20) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 doopenat(ffff80002f0c1240,ffffff9c,200000000080,fdc52675,0,0,15743b06fde527b0) at doopenat+0x66b sys/kern/vfs_syscalls.c:1189 sys_open(ffff80002f0c1240,ffff80003c931030,ffff80003c930f80) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80003c931030) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c931030) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x69998e8370, count: -6