kernel: protection fault trap, code=0 Stopped at lf_advlock+0x2f7: incl 0x28(%r12) ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace lf_advlock(ffff800001431b20,0,ffff80002a316010,2,ffff80002a493fe0,40) at lf_advlock+0x2f7 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001431b20,0,ffff80002a316010,2,ffff80002a493fe0,40) at lf_advlock+0x2f7 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806b3c76f0,ffff80002a316010,2,ffff80002a493fe0,40) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:620 closef(fffffd806a409408,ffff80002a41e038) at closef+0x140 sys/kern/kern_descrip.c:-1 fdfree(ffff80002a41e038) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80002a41e038,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80002a41e038,ffff80002a494220,ffff80002a494170) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a494220) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a494220) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c04979bc110, count: -8 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a493f30 rbx 0 rdx 0xa rcx 0x9 rax 0 r8 0x2 r9 0x1 r10 0x288bd2a67bb633dc r11 0x4fb62a5ed7c422e6 r12 0xdeafbeaddeafbead r13 0x2 r14 0xffff800001431b20 r15 0xffffffffffffffff rip 0xffffffff81193647 lf_advlock+0x2f7 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a493ea0 ss 0x10 lf_advlock+0x2f7: incl 0x28(%r12) ddb{1}> show proc PROC (syz-executor.2) tid=331417 pid=18898 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a41e038 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a41e2c8,0xffffffff8392fc10 process=0xffff8000fffed2c0 user=0xffff80002a48f000, vmspace=0xfffffd806a429988 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83272 361974 99752 0 2 0 syz-executor.4 83272 288274 99752 0 2 0x4000000 syz-executor.4 12448 232412 66025 0 2 0 syz-executor.6 50963 3233 74875 0 7 0 syz-executor.1 50963 310294 74875 0 3 0x4000000 lockflk syz-executor.1 66025 40473 17059 0 3 0x82 nanoslp syz-executor.6 65347 122179 17059 0 3 0x82 nanoslp syz-executor.2 13153 165311 81168 0 3 0x100082 sbwait arp 81168 445675 1 0 3 0x10008a sigsusp sh 17994 63000 17059 0 3 0x2 biowait syz-executor.7 54756 414532 17059 0 3 0x10000082 nanoslp syz-executor.3 99752 141266 17059 0 3 0x82 nanoslp syz-executor.4 49803 3909 17059 0 2 0x2 syz-executor.5 74875 459451 17059 0 3 0x82 nanoslp syz-executor.1 94654 497450 17059 0 3 0x2 biowait syz-executor.0 17059 23943 2139 0 3 0x82 wait syz-execprog 17059 488884 2139 0 3 0x4000082 nanoslp syz-execprog 17059 266745 2139 0 3 0x4000082 wait syz-execprog 17059 150857 2139 0 3 0x4000082 thrsleep syz-execprog 17059 512388 2139 0 3 0x4000082 wait syz-execprog 17059 313757 2139 0 3 0x4000082 thrsleep syz-execprog 17059 978 2139 0 3 0x4000082 wait syz-execprog 17059 391829 2139 0 3 0x4000082 kqread syz-execprog 17059 42771 2139 0 3 0x4000082 wait syz-execprog 17059 441011 2139 0 3 0x4000082 thrsleep syz-execprog 17059 215554 2139 0 3 0x4000082 thrsleep syz-execprog 17059 323246 2139 0 3 0x4000082 wait syz-execprog 17059 28879 2139 0 3 0x4000082 wait syz-execprog 17059 348211 2139 0 3 0x4000082 wait syz-execprog 17059 156693 2139 0 3 0x4000082 thrsleep syz-execprog 17059 17329 2139 0 3 0x4000082 thrsleep syz-execprog 2139 135785 9713 0 3 0x10008a sigsusp ksh 9713 3406 19242 0 3 0x98 kqread sshd-session 19242 257991 94766 0 3 0x92 kqread sshd-session 85098 10906 1 0 3 0x100083 ttyin getty 94766 134354 1 0 3 0x88 kqread sshd 15414 513375 32164 73 3 0x1100090 kqread syslogd 32164 311570 1 0 3 0x100082 sbwait syslogd 93696 347391 1 0 3 0x100080 kqread resolvd 78016 154357 9535 77 3 0x100092 kqread dhcpleased 35871 447186 9535 77 3 0x100092 kqread dhcpleased 9535 47941 1 0 3 0x80 kqread dhcpleased 97206 180107 0 0 3 0x14200 bored smr 79701 23417 0 0 2 0x14200 zerothread 97615 76333 0 0 3 0x14200 aiodoned aiodoned 52719 260066 0 0 3 0x14200 syncer update 97444 296330 0 0 3 0x14200 cleaner cleaner 59913 19194 0 0 3 0x14200 reaper reaper 34154 242533 0 0 3 0x14200 pgdaemon pagedaemon 28498 24543 0 0 3 0x14200 bored viomb 61029 273683 0 0 3 0x40014200 acpi0 acpi0 19965 444679 0 0 3 0x40014200 idle1 93971 170249 0 0 3 0x14200 bored softnet3 95761 59917 0 0 3 0x14200 bored softnet2 23780 448403 0 0 3 0x14200 bored softnet1 84154 456981 0 0 3 0x14200 bored softnet0 57239 294971 0 0 3 0x14200 bored systqmp 42838 397662 0 0 3 0x14200 bored systq 65967 291082 0 0 3 0x14200 tmoslp softclockmp 93785 392139 0 0 3 0x40014200 tmoslp softclock 4480 287546 0 0 3 0x40014200 idle0 1 108285 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 17994 (syz-executor.7) thread 0xffff80002a303220 (63000) exclusive rrwlock inode r = 0 (0xfffffd806e1ff408) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80689dcb00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 94654 (syz-executor.0) thread 0xffff8000ffff02b8 (497450) exclusive rrwlock inode r = 0 (0xfffffd806e1fc1d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068b1fd38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10187 10954K 10965K 166960K 11270 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 6K 166960K 382 0 pf 31 16K 16K 166960K 36 0 ifaddr 42 7K 7K 166960K 50 0 ifgroup 50 2K 2K 166960K 59 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1262 79K 80K 166960K 6569 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 77K 166960K 4936 0 proc 57 78K 115K 166960K 521 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 111 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 415 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 253 147K 200K 166960K 39323 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 39 78K 104K 166960K 6267 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 1K 166960K 31 0 temp 1 8676K 8740K 166960K 14510 0 kqueue 13 20K 20K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 36 0 32 1 0 1 1 0 8 0 rtentry 176 125 0 15 6 1 5 5 0 8 0 unpcb 144 67 0 52 1 0 1 1 0 8 0 syncache 336 9 0 9 2 2 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpcb 808 12 0 9 1 0 1 1 0 8 0 arp 128 21 0 3 1 0 1 1 0 8 0 inpcb 384 69 0 63 1 0 1 1 0 8 0 nd6 144 27 0 3 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 504 0 51 32 3 29 29 0 8 0 art_table 32 505 0 51 5 1 4 4 0 8 0 art_node 16 124 0 24 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11672 0 10149 96 0 96 96 0 8 0 ffsino 288 11672 0 10149 109 0 109 109 0 8 0 nchpl 144 16731 0 14997 66 0 66 66 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 103107 0 103105 5 4 1 2 0 8 0 percpumem 16 49 0 2 1 0 1 1 0 8 0 kstatmem 264 26 0 4 2 0 2 2 0 8 0 scxspl 216 37992 0 37990 10 9 1 8 1 8 0 plimitpl 152 59 0 42 1 0 1 1 0 8 0 sigapl 424 5263 0 5216 8 2 6 6 0 8 0 futexpl 64 28472 0 28472 3 2 1 1 0 8 1 knotepl 120 125 0 0 4 0 4 4 0 8 0 kqueuepl 224 42 0 33 1 0 1 1 0 8 0 pipepl 336 175 0 144 5 2 3 3 0 8 0 fdescpl 520 5245 0 5217 3 0 3 3 0 8 0 filepl 160 64156 0 64011 10 3 7 7 0 8 0 lockfpl 104 18968 0 18966 1 0 1 1 0 8 0 lockfspl 48 4758 0 4756 1 0 1 1 0 8 0 sessionpl 144 35 0 18 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 57432 0 57421 1 0 1 1 0 8 0 zombiepl 144 5218 0 5216 3 2 1 1 0 8 0 processpl 1192 5263 0 5216 6 2 4 5 0 8 0 procpl 656 10128 0 10064 9 2 7 7 0 8 1 sockpl 728 172 0 147 4 1 3 3 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 182 0 0 21 0 21 21 0 8 0 mcl2k 2048 25 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 238 0 0 13 0 13 13 0 8 0 bufpl 280 9297 0 3081 445 0 445 445 0 8 0 anonpl 32 8784 0 0 71 0 71 71 0 246 0 amapchunkpl 152 132505 0 131938 43 16 27 27 0 158 3 amappl16 200 9244 0 9142 10 4 6 6 0 8 0 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 212 0 198 3 2 1 2 0 8 0 amappl13 176 9 0 9 2 2 0 1 0 8 0 amappl12 168 5912 0 5884 3 1 2 2 0 8 0 amappl11 160 59 0 48 1 0 1 1 0 8 0 amappl10 152 67 0 58 4 3 1 1 0 8 0 amappl9 144 1069 0 1069 3 3 0 1 0 8 0 amappl8 136 212 0 175 2 0 2 2 0 8 0 amappl7 128 241 0 222 3 1 2 2 0 8 0 amappl6 120 329 0 320 2 1 1 1 0 8 0 amappl5 112 188 0 182 1 0 1 1 0 8 0 amappl4 104 550 0 527 2 1 1 2 0 8 0 amappl3 96 26155 0 26080 5 2 3 3 0 8 1 amappl2 88 5887 0 5813 6 4 2 4 0 8 0 amappl1 80 35144 0 34557 36 22 14 23 0 8 0 amappl 88 38219 0 38066 8 3 5 5 0 92 1 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 5245 0 5217 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5245 0 5217 1 0 1 1 0 8 0 vmmpekpl 168 32068 0 32018 3 0 3 3 0 8 0 vmmpepl 168 268587 0 266701 138 48 90 122 0 357 4 vmsppl 480 5244 0 5217 8 4 4 5 0 8 0 rwobjpl 72 74065 0 67140 146 19 127 127 0 8 0 pdppl 4096 10497 0 10434 143 72 71 73 0 8 8 pvpl 32 47954 0 0 389 2 387 387 0 265 0 pmappl 256 5244 0 5217 5 3 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 443 0 88 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83845ff0) 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 __mp_lock(ffffffff839e2ac8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839e2ac8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a442540,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7548dcf4a920, count: -6 ddb{0}> machine ddbcpu 1 Stopped at lf_advlock+0x2f7: incl 0x28(%r12) ddb{1}> trace lf_advlock(ffff800001431b20,0,ffff80002a316010,2,ffff80002a493fe0,40) at lf_advlock+0x2f7 ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001431b20,0,ffff80002a316010,2,ffff80002a493fe0,40) at lf_advlock+0x2f7 sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806b3c76f0,ffff80002a316010,2,ffff80002a493fe0,40) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:620 closef(fffffd806a409408,ffff80002a41e038) at closef+0x140 sys/kern/kern_descrip.c:-1 fdfree(ffff80002a41e038) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80002a41e038,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80002a41e038,ffff80002a494220,ffff80002a494170) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a494220) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a494220) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c04979bc110, count: -8