kernel: protection fault trap, code=0 Stopped at lf_advlock+0x2fa: incl 0x28(%r12) ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace lf_advlock(ffff800001440e60,0,fffffd8061d87938,8,ffff80003c438fe8,30) at lf_advlock+0x2fa ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001440e60,0,fffffd8061d87938,8,ffff80003c438fe8,30) at lf_advlock+0x2fa sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd8077d5d548,fffffd8061d87938,8,ffff80003c438fe8,30) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 sys_flock(ffff8000333f4020,ffff80003c439130,ffff80003c439080) at sys_flock+0x295 sys/kern/kern_descrip.c:-1 syscall(ffff80003c439130) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439130) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ff888eee0, count: -5 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c438f30 rbx 0 rdx 0 rcx 0xffff8000333f4020 rax 0xffffffff837e1ff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0 r10 0xf337eb336007cd4a r11 0x8c6b92503dac9dff r12 0xdeadbeefdeadbeef r13 0x8 r14 0xffff80003c438fe8 r15 0x1 rip 0xffffffff824e1f8a lf_advlock+0x2fa cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c438ea0 ss 0x10 lf_advlock+0x2fa: incl 0x28(%r12) ddb{0}> show proc PROC (syz-executor) tid=462172 pid=33636 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000333f5778,0xffffffff839485c0 process=0xffff8000333fc020 user=0xffff80003c434000, vmspace=0xfffffd807baeb028 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 33636 383621 97736 0 7 0 syz-executor 33636 400740 97736 0 3 0x4000000 biowait syz-executor 33636 424019 97736 0 2 0x4000000 syz-executor *33636 462172 97736 0 7 0x4000000 syz-executor 39829 101015 67050 0 2 0 syz-executor 39829 424095 67050 0 3 0x4000080 fsleep syz-executor 71964 382350 80634 0 2 0 syz-executor 71964 210171 80634 0 2 0x4000000 syz-executor 98491 425034 83787 0 2 0 syz-executor 98491 452346 83787 0 3 0x4000080 fsleep syz-executor 67050 213664 57120 0 2 0x3 syz-executor 80634 142684 57120 0 3 0x82 nanoslp syz-executor 75006 375974 57120 0 3 0x82 nanoslp syz-executor 76068 452811 57120 0 2 0x3 syz-executor 38080 493594 57120 0 3 0x82 nanoslp syz-executor 97736 315085 57120 0 3 0x82 nanoslp syz-executor 26429 354715 57120 0 2 0x3 syz-executor 83787 444549 57120 0 3 0x82 nanoslp syz-executor 57120 500959 1436 0 3 0x82 kqread syz-executor 1436 328117 46652 0 3 0x10008a sigsusp ksh 46652 494733 83552 0 3 0x98 kqread sshd-session 83552 226997 93989 0 3 0x92 kqread sshd-session 41611 226633 1 0 3 0x100083 ttyin getty 93989 239879 1 0 3 0x88 kqread sshd 60174 81171 64912 74 3 0x1100092 bpf pflogd 64912 507187 1 0 3 0x80 sbwait pflogd 66226 402937 26047 73 3 0x1100090 kqread syslogd 26047 25420 1 0 3 0x100082 sbwait syslogd 55605 474382 1 0 3 0x100080 kqread resolvd 85073 467192 49376 77 3 0x100092 kqread dhcpleased 20768 263532 49376 77 3 0x100092 kqread dhcpleased 49376 159787 1 0 3 0x80 kqread dhcpleased 52094 215322 0 0 3 0x14200 bored smr 17360 48086 0 0 2 0x14200 zerothread 69477 169599 0 0 3 0x14200 aiodoned aiodoned 4341 398286 0 0 3 0x14200 syncer update 90764 70916 0 0 3 0x14200 cleaner cleaner 63796 291539 0 0 2 0x14200 reaper 45296 431081 0 0 3 0x14200 pgdaemon pagedaemon 57158 143041 0 0 3 0x14200 bored viomb 61272 14994 0 0 3 0x40014200 acpi0 acpi0 17714 332705 0 0 3 0x40014200 idle1 29012 188681 0 0 3 0x14200 bored softnet1 99780 249381 0 0 3 0x14200 bored softnet0 82765 351290 0 0 3 0x14200 bored systqmp 67683 268841 0 0 3 0x14200 bored systq 31465 379121 0 0 3 0x14200 tmoslp softclockmp 40968 467908 0 0 3 0x40014200 tmoslp softclock 53382 77255 0 0 3 0x40014200 idle0 1 9756 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 33636 (syz-executor) thread 0xffff8000333f5a10 (400740) exclusive rrwlock inode r = 0 (0xfffffd8077c90dc8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x34d sys/kern/vfs_vnops.c:116 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8077c8e930) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #10 Xsyscall+0x128 Process 33636 (syz-executor) thread 0xffff8000333f4020 (462172) exclusive rwlock lockflk r = 0 (0xffffffff838126e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 lf_advlock+0x227 sys/kern/vfs_lockf.c:260 #3 VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 #4 sys_flock+0x295 sys/kern/kern_descrip.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #6 Xsyscall+0x128 Process 39829 (syz-executor) thread 0xffff8000333f4a80 (101015) exclusive rwlock vmmaplk r = 0 (0xfffffd807baebc98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #6 Xsyscall+0x128 Process 71964 (syz-executor) thread 0xffff8000333f4d18 (210171) exclusive rrwlock inode r = 0 (0xfffffd806f4f4d88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:687 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 vn_open+0x15a sys/kern/vfs_vnops.c:140 #12 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #14 Xsyscall+0x128 Process 63796 (reaper) thread 0xffff8000ffffdc90 (291539) exclusive rwlock kmmaplk r = 0 (0xffffffff838dbf30) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:831 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 11027K 11205K 166960K 11536 0 pcb 18 14K 15K 166960K 77 0 rtable 197 7K 8K 166960K 412 0 pf 32 17K 18K 166960K 72 0 ifaddr 38 6K 7K 166960K 65 0 ifgroup 51 2K 2K 166960K 85 0 sysctl 4 1K 9K 166960K 9 0 counters 66 36K 37K 166960K 104 0 ioctlops 0 0K 4K 166960K 1523 0 iov 0 0K 16K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1338 84K 85K 166960K 1602 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 16 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 85K 166960K 383 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 164K 166960K 575 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 14 0 in_multi 84 6K 7K 166960K 122 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 6 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 444 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 231 159K 173K 166960K 5353 0 UVM aobj 7 2K 2K 166960K 9 0 pinsyscall 40 80K 98K 166960K 1533 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 11 0K 2K 166960K 41 0 temp 45 8648K 8715K 166960K 20583 0 kqueue 17 26K 26K 166960K 76 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 60 0 55 1 0 1 1 0 8 0 rtentry 176 129 0 43 6 0 6 6 0 8 0 unpcb 144 170 0 152 2 0 2 2 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 59 0 53 1 0 1 1 0 8 0 arp 136 20 0 6 1 0 1 1 0 8 0 inpcb 328 438 0 428 13 6 7 7 0 8 6 nd6 152 27 0 6 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 15 0 15 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 4 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 32 0 1 1 0 1 1 0 8 0 pfstkey 128 32 0 1 1 0 1 1 0 8 0 pfstate 384 32 0 1 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 597 0 231 29 2 27 29 0 8 3 art_table 40 598 0 231 5 0 5 5 0 8 0 art_node 32 129 0 54 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 2 1 1 1 0 8 0 semapl 112 12 0 3 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2085 0 573 96 1 95 96 0 8 0 ffsino 296 2085 0 573 117 0 117 117 0 8 0 nchpl 144 2592 0 890 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 vnodes 216 2255 0 0 126 0 126 126 0 8 0 namei 1024 8377 0 8376 1 0 1 1 0 8 0 percpumem 16 67 0 19 1 0 1 1 0 8 0 kstatmem 264 48 0 24 3 1 2 3 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 10720 0 10719 11 3 8 8 1 8 7 plimitpl 152 63 0 45 1 0 1 1 0 8 0 sigapl 424 689 0 643 6 0 6 6 0 8 0 knotepl 120 307 0 0 10 0 10 10 0 8 0 kqueuepl 224 172 0 160 5 0 5 5 0 8 4 pipepl 344 142 0 115 3 0 3 3 0 8 0 fdescpl 528 673 0 644 3 0 3 3 0 8 0 filepl 160 3409 0 3179 18 3 15 15 0 8 4 lockfpl 104 91 0 89 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 102 0 85 1 0 1 1 0 8 0 ucredpl 104 555 0 540 1 0 1 1 0 8 0 zombiepl 144 769 0 767 2 1 1 1 0 8 0 processpl 1232 689 0 643 5 0 5 5 0 8 0 procpl 664 1144 0 1092 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 677 0 644 17 6 11 11 0 8 7 mcl64k 65536 3 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 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 251 0 0 16 0 16 16 0 8 0 bufpl 280 4099 0 130 284 0 284 284 0 8 0 anonpl 32 8961 0 0 73 0 73 73 0 246 0 amapchunkpl 152 16654 0 16208 29 4 25 27 0 158 2 amappl16 200 2375 0 2346 18 6 12 15 0 8 8 amappl15 192 46 0 46 1 1 0 1 0 8 0 amappl14 184 8 0 8 1 1 0 1 0 8 0 amappl13 176 436 0 435 1 0 1 1 0 8 0 amappl12 168 1075 0 1035 3 1 2 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 84 0 83 1 0 1 1 0 8 0 amappl6 120 294 0 281 1 0 1 1 0 8 0 amappl5 112 89 0 78 1 0 1 1 0 8 0 amappl4 104 420 0 390 1 0 1 1 0 8 0 amappl3 96 2714 0 2630 3 0 3 3 0 8 0 amappl2 88 785 0 712 2 0 2 2 0 8 0 amappl1 80 10053 0 9462 14 1 13 14 0 8 0 amappl 88 4564 0 4411 5 0 5 5 0 92 0 uvmvnodes 80 2255 0 0 47 0 47 47 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 dma512 512 1 0 1 1 1 0 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 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 673 0 644 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 673 0 644 1 0 1 1 0 8 0 vmmpekpl 168 7246 0 7210 2 0 2 2 0 8 0 vmmpepl 168 50063 0 48246 101 4 97 97 0 357 9 vmsppl 488 672 0 643 6 1 5 5 0 8 0 rwobjpl 80 18740 0 15562 66 0 66 66 0 8 0 pdppl 4096 1354 0 1286 102 30 72 82 0 8 4 pvpl 32 14536 0 0 120 2 118 118 0 265 0 pmappl 256 672 0 643 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 37 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace lf_advlock(ffff800001440e60,0,fffffd8061d87938,8,ffff80003c438fe8,30) at lf_advlock+0x2fa ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001440e60,0,fffffd8061d87938,8,ffff80003c438fe8,30) at lf_advlock+0x2fa sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd8077d5d548,fffffd8061d87938,8,ffff80003c438fe8,30) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 sys_flock(ffff8000333f4020,ffff80003c439130,ffff80003c439080) at sys_flock+0x295 sys/kern/kern_descrip.c:-1 syscall(ffff80003c439130) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439130) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ff888eee0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x73204e4ae4b0, count: -3