login: kernel: protection fault trap, code=0 Stopped at lf_advlock+0x21f: addl $0x1,0x28(%rbx) 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(ffff800000bcf0e0,0,fffffd806d5bf1f0,2,ffff8000212044c0,40) at lf_advlock+0x21f ls_ref sys/kern/vfs_lockf.c:140 [inline] lf_advlock(ffff800000bcf0e0,0,fffffd806d5bf1f0,2,ffff8000212044c0,40) at lf_advlock+0x21f sys/kern/vfs_lockf.c:281 VOP_ADVLOCK(fffffd806caccb68,fffffd806d5bf1f0,2,ffff8000212044c0,40) at VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:628 closef(fffffd8075a19988,ffff800021192000) at closef+0xe5 syscall(ffff8000212045f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212045f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8490, count: -5 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800021204410 rbx 0xdeaf4152deaf4152 rdx 0x6 rcx 0x5 rax 0 r8 0xffff8000212044c0 r9 0x40 r10 0 r11 0xe3fde0640d4885cd r12 0x2 r13 0xffffffffffffffff r14 0xffff800000bcf0e0 r15 0 rip 0xffffffff81744def lf_advlock+0x21f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021204380 ss 0x10 lf_advlock+0x21f: addl $0x1,0x28(%rbx) ddb{0}> show proc PROC (syz-executor3824244753) pid=32750 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021192540,0xffff800021193cf0 process=0xffff8000211f7620 user=0xffff8000211ff000, vmspace=0xfffffd8070acdb90 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18628 35920 99008 0 3 0 lockflk syz-executor3824244753 81509 29344 89458 0 3 0 lockflk syz-executor3824244753 99232 196077 84468 0 3 0 lockflk syz-executor3824244753 *26172 32750 56548 0 7 0 syz-executor3824244753 5151 186564 48998 0 3 0x80 nanoslp syz-executor3824244753 82521 512317 48998 0 3 0x80 nanoslp syz-executor3824244753 37342 391057 48998 0 3 0x80 nanoslp syz-executor3824244753 85199 52638 48998 0 3 0x80 nanoslp syz-executor3824244753 56548 90145 48998 0 3 0x80 nanoslp syz-executor3824244753 84468 10416 48998 0 3 0x80 nanoslp syz-executor3824244753 99008 497388 48998 0 3 0x80 nanoslp syz-executor3824244753 89458 298492 48998 0 3 0x80 nanoslp syz-executor3824244753 48998 215837 96802 0 3 0x82 nanoslp syz-executor3824244753 96802 349695 92859 0 3 0x10008a sigsusp ksh 92859 446585 2168 0 3 0x9a kqread sshd 96558 428914 1 0 3 0x100083 ttyin getty 2168 465351 1 0 3 0x88 kqread sshd 21763 521931 36152 74 3 0x1100092 bpf pflogd 36152 121026 1 0 3 0x80 netio pflogd 16251 374712 84715 73 3 0x1100090 kqread syslogd 84715 6513 1 0 3 0x100082 netio syslogd 29116 345551 1 0 3 0x100080 kqread resolvd 91223 64900 2224 77 3 0x100092 kqread dhcpleased 14449 20130 2224 77 3 0x100092 kqread dhcpleased 2224 341632 1 0 3 0x80 kqread dhcpleased 1541 109059 0 0 3 0x14200 bored smr 73141 508431 0 0 3 0x14200 pgzero zerothread 19358 228342 0 0 3 0x14200 aiodoned aiodoned 56414 387776 0 0 3 0x14200 syncer update 45416 331533 0 0 3 0x14200 cleaner cleaner 65310 121593 0 0 3 0x14200 reaper reaper 98804 2362 0 0 3 0x14200 pgdaemon pagedaemon 75534 166076 0 0 3 0x14200 bored viomb 12650 218557 0 0 3 0x40014200 acpi0 acpi0 21840 445146 0 0 7 0x40014200 idle1 87651 438606 0 0 3 0x14200 bored softnet 29279 489971 0 0 3 0x14200 bored systqmp 15528 467937 0 0 3 0x14200 bored systq 14096 377589 0 0 3 0x40014200 bored softclock 57035 292852 0 0 3 0x40014200 idle0 1 511746 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 26172 (syz-executor3824244753) thread 0xffff800021192000 (32750) exclusive rwlock lockflk r = 0 (0xffffffff8291bb40) #0 witness_lock+0x44d #1 lf_advlock+0x189 sys/kern/vfs_lockf.c:263 #2 VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:628 #3 closef+0xe5 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10161 6456K 6478K 78643K 180684 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 112 0 ifaddr 29 8K 8K 78643K 32 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 4K 78643K 1479 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1171 73K 73K 78643K 254399 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 4 6K 17K 78643K 508309 0 proc 67 87K 87K 78643K 282 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 97 440K 440K 78643K 97 0 exec 0 0K 2K 78643K 432 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 95 5K 5K 78643K 171698 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 24 4690K 4753K 78643K 172778 0 kqueue 11 16K 18K 78643K 24 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 136 35 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 2 0 1 0 8 0 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 32 0 26 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 8 0 7 2 1 1 1 0 8 0 pfstkey 112 8 0 7 2 1 1 1 0 8 0 pfstate 320 8 0 7 2 1 1 1 0 8 0 pfrule 1360 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 85210 0 83826 87 0 87 87 0 8 0 ffsino 272 85210 0 83826 93 0 93 93 0 8 0 nchpl 144 85385 0 83835 58 0 58 58 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 2376511 0 2376511 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 4234 0 4234 76 75 1 8 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 169765 0 169720 6 0 6 6 0 8 0 knotepl 120 56 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 336 86 0 83 2 1 1 1 0 8 0 fdescpl 496 169751 0 169724 4 0 4 4 0 8 0 filepl 152 1864929 0 1864859 4 0 4 4 0 8 1 lockfpl 104 318975 0 318973 1 0 1 1 0 8 0 lockfspl 48 161044 0 161042 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 1524986 0 1524974 1 0 1 1 0 8 0 zombiepl 144 169724 0 169720 2 1 1 1 0 8 0 processpl 1064 169765 0 169720 4 0 4 4 0 8 0 procpl 672 169765 0 169720 4 0 4 4 0 8 0 sockpl 480 84 0 60 5 1 4 4 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 68 0 0 9 1 8 8 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 134 0 0 7 0 7 7 0 8 0 bufpl 288 2014 0 93 138 0 138 138 0 8 0 anonpl 24 1058003 0 1055650 17 2 15 17 0 186 0 amapchunkpl 152 173428 0 173272 8 1 7 8 0 158 0 amappl16 200 169465 0 169462 2 1 1 1 0 8 0 amappl15 192 67 0 64 1 0 1 1 0 8 0 amappl14 184 2 0 1 1 0 1 1 0 8 0 amappl13 176 35 0 34 2 1 1 1 0 8 0 amappl12 168 9 0 9 2 2 0 1 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 4 0 2 1 0 1 1 0 8 0 amappl9 144 450 0 448 1 0 1 1 0 8 0 amappl8 136 370 0 367 1 0 1 1 0 8 0 amappl7 128 65 0 62 1 0 1 1 0 8 0 amappl6 120 115 0 102 1 0 1 1 0 8 0 amappl5 112 169628 0 169607 1 0 1 1 0 8 0 amappl4 104 641 0 620 1 0 1 1 0 8 0 amappl3 96 121 0 112 1 0 1 1 0 8 0 amappl2 88 370 0 332 1 0 1 1 0 8 0 amappl1 80 686594 0 686196 10 1 9 10 0 8 0 amappl 88 171417 0 171340 2 0 2 2 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 169751 0 169724 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 169751 0 169724 1 0 1 1 0 8 0 vmmpekpl 168 387547 0 387530 1 0 1 1 0 8 0 vmmpepl 168 2737693 0 2736666 89 44 45 48 0 357 0 vmsppl 368 169750 0 169724 3 0 3 3 0 8 0 rwobjpl 56 183523 0 177035 92 0 92 92 0 8 0 pdppl 4096 339509 0 339448 199 138 61 69 0 8 0 pvpl 32 4718211 0 4713850 43 6 37 43 0 265 0 pmappl 248 169750 0 169724 2 0 2 2 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 559 0 144 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace lf_advlock(ffff800000bcf0e0,0,fffffd806d5bf1f0,2,ffff8000212044c0,40) at lf_advlock+0x21f ls_ref sys/kern/vfs_lockf.c:140 [inline] lf_advlock(ffff800000bcf0e0,0,fffffd806d5bf1f0,2,ffff8000212044c0,40) at lf_advlock+0x21f sys/kern/vfs_lockf.c:281 VOP_ADVLOCK(fffffd806caccb68,fffffd806d5bf1f0,2,ffff8000212044c0,40) at VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:628 closef(fffffd8075a19988,ffff800021192000) at closef+0xe5 syscall(ffff8000212045f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212045f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8490, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a 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+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5