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(ffff8000015f6120,0,fffffd800c175cb0,2,ffff80003c419990,20) at lf_advlock+0x2fa ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff8000015f6120,0,fffffd800c175cb0,2,ffff80003c419990,20) at lf_advlock+0x2fa sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd805f9ecb58,fffffd800c175cb0,2,ffff80003c419990,20) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 vn_closefile(fffffd800c175cb0,ffff80003c4d7a28) at vn_closefile+0xba sys/kern/vfs_vnops.c:615 fdrop(fffffd800c175cb0,ffff80003c4d7a28) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd800c175cb0,ffff80003c4d7a28) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003c419b70) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c419b70) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5e4fc3a0e60, count: -7 ddb{1}> show registers rdi 0xffff800033bad000 rsi 0x917 rbp 0xffff80003c4198e0 rbx 0 rdx 0xffff800033bad000 rcx 0x916 rax 0xffffffff818283ae witness_assert+0x4ee r8 0 r9 0x1 r10 0 r11 0xeff5366212b67b87 r12 0xdead4110dead4110 r13 0x2 r14 0xffff80003c419990 r15 0x1 rip 0xffffffff811d56ea lf_advlock+0x2fa cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c419850 ss 0x10 lf_advlock+0x2fa: incl 0x28(%r12) ddb{1}> show proc PROC (syz-executor) tid=390723 pid=51040 tcnt=3 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=0xffff80003c4d7cc0,0xffff8000ffff2a88 process=0xffff8000fffedcf8 user=0xffff80003c414000, vmspace=0xfffffd805f255b98 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 48911 307679 13620 0 2 0 syz-executor 48911 42678 13620 0 7 0x4000000 syz-executor 94478 46432 38928 0 4 0x82000 syz-executor 94478 399673 38928 0 3 0x4002000 suspend syz-executor 94478 77368 38928 0 2 0x4082000 syz-executor 65309 483836 27340 0 2 0 syz-executor 65309 478475 27340 0 3 0x4000080 rest syz-executor 65309 80611 27340 0 3 0x4000080 rest syz-executor 65309 245008 27340 0 2 0x4000000 syz-executor 51040 113758 2259 0 2 0 syz-executor 51040 212545 2259 0 3 0x4000000 tqbar syz-executor *51040 390723 2259 0 7 0x4000000 syz-executor 27645 307056 83007 0 2 0 syz-executor 27645 157122 83007 0 3 0x4000080 fsleep syz-executor 27645 284763 83007 0 3 0x4000080 fsleep syz-executor 68159 199680 8891 0 2 0x11 syz-executor 68159 286342 8891 0 3 0x4000090 fsleep syz-executor 68159 467950 8891 0 3 0x4000090 fsleep syz-executor 67165 55439 0 0 3 0x14200 acct acct 98349 18990 1 0 3 0x100083 ttyin getty 45000 70229 0 0 3 0x14280 nfsidl nfsio 12314 339826 0 0 3 0x14280 nfsidl nfsio 9070 234782 0 0 3 0x14280 nfsidl nfsio 63310 353984 0 0 3 0x14280 nfsidl nfsio 83007 43783 91457 0 3 0x82 nanoslp syz-executor 38928 504384 91457 0 3 0x82 nanoslp syz-executor 27340 235826 91457 0 3 0x82 nanoslp syz-executor 78977 166060 91457 0 3 0x82 nanoslp syz-executor 8891 324937 91457 0 3 0x82 nanoslp syz-executor 13620 445252 91457 0 2 0x3 syz-executor 74460 154925 91457 0 3 0x82 wait syz-executor 2259 496380 91457 0 3 0x82 nanoslp syz-executor 91457 130004 54905 0 3 0x82 kqread syz-executor 54905 50570 25638 0 3 0x10008a sigsusp ksh 25638 262302 51813 0 3 0x98 kqread sshd-session 51813 228568 70565 0 3 0x92 kqread sshd-session 70565 473468 1 0 3 0x88 kqread sshd 2377 422994 7749 74 3 0x1100092 bpf pflogd 7749 352610 1 0 3 0x80 sbwait pflogd 41543 173253 48318 73 3 0x1100090 kqread syslogd 48318 354855 1 0 3 0x100082 sbwait syslogd 22583 188118 1 0 2 0x100001 resolvd 44104 303204 52584 77 2 0x100013 dhcpleased 56774 478466 52584 77 3 0x100092 kqread dhcpleased 52584 438856 1 0 3 0x80 kqread dhcpleased 14010 359430 0 0 3 0x14200 bored smr 52161 217425 0 0 2 0x14200 zerothread 26072 200473 0 0 3 0x14200 aiodoned aiodoned 63800 344457 0 0 3 0x14200 syncer update 60801 104650 0 0 3 0x14200 cleaner cleaner 58164 177641 0 0 2 0x14200 reaper 52562 133245 0 0 3 0x14200 pgdaemon pagedaemon 95752 88171 0 0 3 0x14200 bored viomb 40121 502025 0 0 3 0x40014200 acpi0 acpi0 54732 47425 0 0 3 0x40014200 idle1 86370 254646 0 0 3 0x14200 bored softnet1 89806 177260 0 0 2 0x14200 softnet0 96439 418085 0 0 2 0x14200 systqmp 8675 375457 0 0 3 0x14200 bored systq 57840 438798 0 0 3 0x14200 tmoslp softclockmp 22605 246361 0 0 3 0x40014200 tmoslp softclock 70741 173963 0 0 3 0x40014200 idle0 1 244157 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 51040 (syz-executor) thread 0xffff8000ffff2d10 (212545) exclusive rwlock clonelk r = 0 (0xffffffff838c0bb8) #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 if_clone_destroy+0x93 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2159 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 51040 (syz-executor) thread 0xffff80003c4d7a28 (390723) exclusive rwlock lockflk r = 0 (0xffffffff83866548) #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 vn_closefile+0xba sys/kern/vfs_vnops.c:615 #5 fdrop+0x121 sys/kern/kern_descrip.c:1281 #6 closef+0x192 sys/kern/kern_descrip.c:1265 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a7b6c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 lf_advlock+0x227 sys/kern/vfs_lockf.c:260 #5 VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 #6 vn_closefile+0xba sys/kern/vfs_vnops.c:615 #7 fdrop+0x121 sys/kern/kern_descrip.c:1281 #8 closef+0x192 sys/kern/kern_descrip.c:1265 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 Process 58164 (reaper) thread 0xffff8000ffffd9f8 (177641) exclusive rwlock kmmaplk r = 0 (0xffffffff83a00c18) #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:1798 #4 km_free+0x87 sys/uvm/uvm_km.c:714 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1ca sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11105 12183K 13969K 166960K 14007 0 pcb 18 18K 19K 166960K 586 0 rtable 224 11K 12K 166960K 705 0 pf 34 17K 81K 166960K 227 0 ifaddr 35 6K 9K 166960K 148 0 ifgroup 48 2K 2K 166960K 272 0 sysctl 4 1K 9K 166960K 19 0 counters 68 36K 38K 166960K 296 0 ioctlops 0 0K 4K 166960K 2221 0 iov 0 0K 24K 166960K 99 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1399 88K 89K 166960K 2901 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 43 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 130 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1867 0 sigio 0 0K 0K 166960K 121 0 proc 74 115K 147K 166960K 757 0 subproc 72 4K 4K 166960K 92 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 256 0 in_multi 74 5K 7K 166960K 202 0 ether_multi 1 0K 0K 166960K 17 0 mrt 3 0K 0K 166960K 32 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 762 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 262 162K 186K 166960K 18697 0 UVM aobj 117 17K 17K 166960K 129 0 pinsyscall 42 84K 100K 166960K 3081 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 223 0 NDP 11 0K 2K 166960K 106 0 temp 78 9084K 9156K 166960K 90213 0 kqueue 14 22K 30K 166960K 384 0 SYN cache 2 200K 208K 166960K 3 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 120 177 0 174 2 1 1 2 0 8 0 rtentry 176 200 0 113 6 0 6 6 0 8 0 unpcb 144 1430 0 1408 7 6 1 6 0 8 0 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpcb 736 595 0 590 11 7 4 7 0 8 3 arp 136 38 0 18 1 0 1 1 0 8 0 inpcb 328 2755 0 2745 21 17 4 12 0 8 2 nd6 152 35 0 12 1 0 1 1 0 8 0 pkpcb 40 10 0 10 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 86 0 86 2 1 1 1 0 8 1 pppxif 1504 12 0 12 4 3 1 1 0 8 1 pfstscr 40 2 0 2 2 2 0 1 0 8 0 pffrag 232 74 0 57 2 1 1 2 0 482 0 pffrnode 88 73 0 57 1 0 1 1 0 8 0 pffrent 40 231 0 214 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 108 0 27 1 0 1 1 0 8 0 pfstkey 128 112 0 31 3 0 3 3 0 8 0 pfstate 448 109 0 29 10 0 10 10 0 8 0 pfrule 1360 26 0 20 2 1 1 2 0 8 0 rttmr 136 4 0 4 2 2 0 1 0 8 0 art_heap8 4096 5 0 1 5 0 5 5 0 8 1 art_heap4 256 884 0 453 34 5 29 29 0 8 0 art_table 40 889 0 454 5 0 5 5 0 8 0 art_node 32 198 0 110 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 8 1 0 1 1 0 8 0 semapl 112 127 0 117 1 0 1 1 0 8 0 shmpl 112 120 0 12 4 0 4 4 0 8 0 dirhash 1024 40 0 23 3 0 3 3 0 8 0 dino2pl 256 5028 0 3571 93 0 93 93 0 8 0 ffsino 296 5028 0 3571 114 0 114 114 0 8 0 nchpl 144 7701 0 5990 64 0 64 64 0 8 0 rtmask 32 16 0 16 2 2 0 1 0 8 0 vnodes 216 5840 0 0 325 0 325 325 0 8 0 namei 1024 26936 0 26936 3 2 1 1 0 8 1 percpumem 16 163 0 114 1 0 1 1 0 8 0 vcpupl 3968 6 0 0 1 0 1 1 0 8 0 vmpool 848 6 0 0 1 0 1 1 0 8 0 kstatmem 264 174 0 147 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 3 2 1 1 0 8 1 scxspl 216 33191 0 33191 11 10 1 8 1 8 1 plimitpl 152 584 0 566 1 0 1 1 0 8 0 sigapl 424 2204 0 2151 9 2 7 8 0 8 0 knotepl 120 554 0 0 17 0 17 17 0 8 0 kqueuepl 224 650 0 639 6 5 1 5 0 8 0 pipepl 344 400 0 373 9 6 3 6 0 8 0 fdescpl 528 2154 0 2123 3 0 3 3 0 8 0 filepl 160 15151 0 14926 27 15 12 22 0 8 0 lockfpl 104 977 0 975 4 3 1 2 0 8 0 lockfspl 48 327 0 325 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 66 0 49 1 0 1 1 0 8 0 ucredpl 104 2408 0 2394 1 0 1 1 0 8 0 zombiepl 144 2195 0 2193 1 0 1 1 0 8 0 processpl 1232 2204 0 2151 7 2 5 6 0 8 0 procpl 664 5079 0 5014 9 3 6 8 0 8 0 sosppl 176 8 0 8 2 2 0 1 0 8 0 sockpl 752 4429 0 4394 40 33 7 20 0 8 3 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 45 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 339 0 0 21 0 21 21 0 8 0 bufpl 280 11143 0 5013 439 0 439 439 0 8 0 anonpl 32 10257 0 0 83 0 83 83 0 246 0 amapchunkpl 152 64605 0 63939 36 8 28 35 0 158 0 amappl16 200 6310 0 6209 32 24 8 17 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 453 0 452 1 0 1 1 0 8 0 amappl13 176 137 0 125 1 0 1 1 0 8 0 amappl12 168 2416 0 2386 2 0 2 2 0 8 0 amappl11 160 7 0 7 3 2 1 1 0 8 1 amappl10 152 66 0 51 1 0 1 1 0 8 0 amappl9 144 270 0 269 2 1 1 1 0 8 0 amappl8 136 112 0 109 1 0 1 1 0 8 0 amappl7 128 175 0 161 1 0 1 1 0 8 0 amappl6 120 176 0 174 1 0 1 1 0 8 0 amappl5 112 117 0 106 1 0 1 1 0 8 0 amappl4 104 318 0 296 1 0 1 1 0 8 0 amappl3 96 11417 0 11313 3 0 3 3 0 8 0 amappl2 88 2295 0 2219 2 0 2 2 0 8 0 amappl1 80 18043 0 17437 18 3 15 17 0 8 0 amappl 88 17603 0 17417 5 0 5 5 0 92 0 uvmvnodes 80 173 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 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 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 2 2 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 128 0 12 3 0 3 3 0 8 0 uaddrrnd 24 2154 0 2123 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2154 0 2123 1 0 1 1 0 8 0 vmmpekpl 168 18529 0 18483 3 0 3 3 0 8 0 vmmpepl 168 140928 0 138896 108 16 92 101 0 357 0 vmsppl 488 2153 0 2122 6 1 5 5 0 8 0 rwobjpl 80 37873 0 36545 33 2 31 32 0 8 0 pdppl 4096 4327 0 4250 115 38 77 83 0 8 0 pvpl 32 18057 0 0 147 1 146 146 0 265 0 pmappl 256 2159 0 2122 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 334 0 61 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83887ff0) 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(ffffffff83a7aec0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a7aec0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 vn_ioctl(fffffd806d75d5c8,80044b02,ffff800033fb23f0,ffff8000ffff2548) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 sys_ioctl(ffff8000ffff2548,ffff800033fb25d0,ffff800033fb2520) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800033fb25d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033fb25d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72f936896f0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at lf_advlock+0x2fa: incl 0x28(%r12) ddb{1}> trace lf_advlock(ffff8000015f6120,0,fffffd800c175cb0,2,ffff80003c419990,20) at lf_advlock+0x2fa ls_ref sys/kern/vfs_lockf.c:138 [inline] lf_advlock(ffff8000015f6120,0,fffffd800c175cb0,2,ffff80003c419990,20) at lf_advlock+0x2fa sys/kern/vfs_lockf.c:278 VOP_ADVLOCK(fffffd805f9ecb58,fffffd800c175cb0,2,ffff80003c419990,20) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 vn_closefile(fffffd800c175cb0,ffff80003c4d7a28) at vn_closefile+0xba sys/kern/vfs_vnops.c:615 fdrop(fffffd800c175cb0,ffff80003c4d7a28) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd800c175cb0,ffff80003c4d7a28) at closef+0x192 sys/kern/kern_descrip.c:1265 syscall(ffff80003c419b70) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c419b70) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5e4fc3a0e60, count: -7