kernel: protection fault trap, code=0 Stopped at lf_advlock+0x2fa: 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(ffff800001450ee0,0,ffff800039ffa850,2,ffff80003c419680,40) at lf_advlock+0x2fa ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001450ee0,0,ffff800039ffa850,2,ffff80003c419680,40) at lf_advlock+0x2fa sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806ea7eaf8,ffff800039ffa850,2,ffff80003c419680,40) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 closef(fffffd805cbf3e18,ffff8000313dc7e8) at closef+0x140 sys/kern/kern_descrip.c:-1 fdfree(ffff8000313dc7e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000313dc7e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000313dc7e8,ffff80003c4198c0,ffff80003c419810) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4198c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4198c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a93e01adcc0, count: -8 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4195d0 rbx 0 rdx 0 rcx 0xffff8000313dc7e8 rax 0xffff8000299edff0 r8 0 r9 0x1 r10 0xf40d7ad74ca1d28f r11 0x64edaf32a5b218c0 r12 0xdeadbeefdeadbeef r13 0x2 r14 0xffff80003c419680 r15 0x1 rip 0xffffffff8312a0da lf_advlock+0x2fa cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c419540 ss 0x10 lf_advlock+0x2fa: incl 0x28(%r12) ddb{1}> show proc PROC (syz-executor) tid=434717 pid=48029 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000313dc7e8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000313dd778,0xffff8000313dc560 process=0xffff80003c4744f8 user=0xffff80003c414000, vmspace=0xfffffd805fe6b210 estcpu=32, cpticks=1, pctcpu=0.1, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51674 188208 77724 0 2 0 syz-executor 78034 62929 89526 0 2 0 syz-executor 78034 277326 89526 0 7 0x4000000 syz-executor 41203 370904 69416 0 2 0 syz-executor 41203 71377 69416 0 3 0x4000080 fsleep syz-executor 41203 168246 69416 0 3 0x4000080 fsleep syz-executor 41203 506886 69416 0 3 0x4000080 fsleep syz-executor 95666 263101 0 0 3 0x14200 bored sosplice 68843 63602 0 0 3 0x14280 nfsidl nfsio 50398 320740 0 0 3 0x14280 nfsidl nfsio 45308 220569 0 0 3 0x14280 nfsidl nfsio 10912 351137 0 0 3 0x14200 acct acct 23697 465984 99291 0 3 0x82 wait syz-executor 9899 354710 99291 0 3 0x82 nanoslp syz-executor 69416 437624 99291 0 3 0x82 nanoslp syz-executor 29383 210522 99291 0 3 0x82 nanoslp syz-executor 96588 70848 99291 0 3 0x82 wait syz-executor 77724 124713 99291 0 3 0x82 nanoslp syz-executor 16028 494483 99291 0 3 0x82 nanoslp syz-executor 89526 110067 99291 0 3 0x82 nanoslp syz-executor 99291 59266 83356 0 3 0x82 kqread syz-executor 83356 516296 15733 0 3 0x10008a sigsusp ksh 15733 521889 13387 0 3 0x98 kqread sshd-session 13387 247400 85806 0 3 0x92 kqread sshd-session 15212 511522 1 0 3 0x100083 ttyopn getty 85806 483843 1 0 3 0x88 kqread sshd 68947 485648 6486 74 3 0x1100092 bpf pflogd 6486 508107 1 0 3 0x80 sbwait pflogd 69615 467158 94772 73 3 0x1100090 kqread syslogd 94772 24652 1 0 3 0x100082 sbwait syslogd 15615 373202 1 0 3 0x100080 kqread resolvd 56139 130500 33561 77 3 0x100092 kqread dhcpleased 95108 237306 33561 77 3 0x100092 kqread dhcpleased 33561 290442 1 0 3 0x80 kqread dhcpleased 34187 396964 0 0 3 0x14200 bored smr 18317 119301 0 0 2 0x14200 zerothread 73205 241312 0 0 3 0x14200 aiodoned aiodoned 70573 239632 0 0 3 0x14200 syncer update 6242 90636 0 0 3 0x14200 cleaner cleaner 66745 399492 0 0 2 0x14200 reaper 31090 269061 0 0 3 0x14200 pgdaemon pagedaemon 8135 502631 0 0 3 0x14200 bored viomb 75478 158985 0 0 3 0x40014200 acpi0 acpi0 25149 505276 0 0 3 0x40014200 idle1 25061 498088 0 0 3 0x14200 bored softnet1 81894 212639 0 0 3 0x14200 bored softnet0 46146 90493 0 0 3 0x14200 bored systqmp 94018 368284 0 0 3 0x14200 bored systq 65276 256832 0 0 3 0x14200 tmoslp softclockmp 36240 91419 0 0 3 0x40014200 tmoslp softclock 32924 232213 0 0 3 0x40014200 idle0 1 340941 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 66745 (reaper) thread 0xffff8000ffffdc90 (399492) exclusive rwlock kmmaplk r = 0 (0xffffffff838f8908) #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:5168 #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11096K 11421K 166960K 12411 0 pcb 17 14K 15K 166960K 85 0 rtable 206 8K 8K 166960K 331 0 pf 36 18K 24K 166960K 111 0 ifaddr 39 7K 7K 166960K 75 0 ifgroup 51 2K 2K 166960K 110 0 sysctl 3 1K 9K 166960K 12 0 counters 66 36K 38K 166960K 140 0 ioctlops 0 0K 4K 166960K 1628 0 iov 0 0K 16K 166960K 26 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1405 88K 89K 166960K 1972 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 30 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 540 0 sigio 0 0K 0K 166960K 6 0 proc 72 115K 164K 166960K 595 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 70 0 in_multi 88 6K 7K 166960K 123 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 4 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 450 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 252 168K 177K 166960K 6736 0 UVM aobj 15 2K 2K 166960K 15 0 pinsyscall 42 84K 102K 166960K 1628 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 34 0 NDP 11 0K 1K 166960K 51 0 temp 45 8647K 8712K 166960K 20848 0 kqueue 16 22K 31K 166960K 127 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 64 0 60 1 0 1 1 0 8 0 rtentry 176 115 0 28 5 0 5 5 0 8 0 unpcb 144 280 0 263 3 0 3 3 0 8 2 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 6 0 6 1 1 0 1 0 8 0 tcpcb 736 216 0 212 10 9 1 7 0 8 0 arp 136 16 0 5 1 0 1 1 0 8 0 inpcb 328 645 0 637 14 5 9 12 0 8 8 nd6 152 18 0 3 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 33 0 33 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 47 0 7 1 0 1 1 0 8 0 pfstkey 128 47 0 8 2 0 2 2 0 8 0 pfstate 384 46 0 7 5 0 5 5 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 478 0 80 29 2 27 29 0 8 0 art_table 40 480 0 80 5 0 5 5 0 8 0 art_node 32 114 0 38 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 24 0 14 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2464 0 959 96 0 96 96 0 8 0 ffsino 296 2464 0 959 118 0 118 118 0 8 0 nchpl 144 3240 0 1551 64 0 64 64 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 uvmvnodes 80 2905 0 0 60 0 60 60 0 8 0 vnodes 216 2905 0 0 162 0 162 162 0 8 0 namei 1024 10553 0 10553 3 2 1 2 0 8 1 percpumem 16 85 0 37 1 0 1 1 0 8 0 kstatmem 264 72 0 48 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 12316 0 12316 5 4 1 3 1 8 1 plimitpl 152 89 0 70 1 0 1 1 0 8 0 sigapl 424 844 0 791 7 1 6 7 0 8 0 knotepl 120 549 0 0 17 0 17 17 0 8 0 kqueuepl 224 182 0 172 3 1 2 2 0 8 0 pipepl 344 141 0 113 3 0 3 3 0 8 0 fdescpl 528 822 0 791 3 0 3 3 0 8 0 filepl 160 4791 0 4565 24 6 18 21 0 8 7 lockfpl 104 315 0 313 2 0 2 2 0 8 1 lockfspl 48 146 0 144 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 107 0 90 1 0 1 1 0 8 0 ucredpl 104 817 0 803 1 0 1 1 0 8 0 zombiepl 144 850 0 845 1 0 1 1 0 8 0 processpl 1232 844 0 791 6 1 5 5 0 8 0 procpl 664 1585 0 1528 6 0 6 6 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 752 998 0 969 24 12 12 21 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 55 0 0 7 0 7 7 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1140 0 0 72 0 72 72 0 8 0 bufpl 280 4747 0 124 331 0 331 331 0 8 0 anonpl 32 7693 0 0 62 0 62 62 0 246 0 amapchunkpl 152 21097 0 20565 30 6 24 27 0 158 1 amappl16 200 2980 0 2920 21 14 7 15 0 8 3 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 118 0 105 1 0 1 1 0 8 0 amappl13 176 16 0 16 1 1 0 1 0 8 0 amappl12 168 1464 0 1433 3 1 2 2 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 39 0 37 1 0 1 1 0 8 0 amappl7 128 105 0 93 1 0 1 1 0 8 0 amappl6 120 183 0 179 1 0 1 1 0 8 0 amappl5 112 128 0 119 1 0 1 1 0 8 0 amappl4 104 301 0 282 1 0 1 1 0 8 0 amappl3 96 3630 0 3526 4 1 3 3 0 8 0 amappl2 88 1069 0 990 2 0 2 2 0 8 0 amappl1 80 10325 0 9718 15 0 15 15 0 8 0 amappl 88 5992 0 5813 5 0 5 5 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 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 822 0 791 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 822 0 791 1 0 1 1 0 8 0 vmmpekpl 168 8293 0 8251 3 1 2 3 0 8 0 vmmpepl 168 58482 0 56437 101 0 101 101 0 357 3 vmsppl 488 821 0 790 6 1 5 5 0 8 1 rwobjpl 80 21090 0 17183 80 0 80 80 0 8 0 pdppl 4096 1652 0 1580 100 28 72 84 0 8 0 pvpl 32 16375 0 0 134 1 133 133 0 265 0 pmappl 256 821 0 790 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 348 0 45 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837d7ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83988bd0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83988bd0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 vn_closefile(fffffd805cbf37d8,ffff8000313ddca8) at vn_closefile+0x41 sys/kern/vfs_vnops.c:608 fdrop(fffffd805cbf37d8,ffff8000313ddca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805cbf37d8,ffff8000313ddca8) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff80003c43fbb0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c43fbb0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd331879b10, count: -10 ddb{0}> machine ddbcpu 1 Stopped at lf_advlock+0x2fa: incl 0x28(%r12) ddb{1}> trace lf_advlock(ffff800001450ee0,0,ffff800039ffa850,2,ffff80003c419680,40) at lf_advlock+0x2fa ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff800001450ee0,0,ffff800039ffa850,2,ffff80003c419680,40) at lf_advlock+0x2fa sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd806ea7eaf8,ffff800039ffa850,2,ffff80003c419680,40) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 closef(fffffd805cbf3e18,ffff8000313dc7e8) at closef+0x140 sys/kern/kern_descrip.c:-1 fdfree(ffff8000313dc7e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000313dc7e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000313dc7e8,ffff80003c4198c0,ffff80003c419810) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4198c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4198c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a93e01adcc0, count: -8