kernel: protection fault trap, code=0 Stopped at lf_advlock+0x21f: addl $0x1,0x28(%rbx) 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(ffff800000beaf60,0,fffffd8064acdd98,2,ffff80002e3bad10,40) at lf_advlock+0x21f ls_ref sys/kern/vfs_lockf.c:140 [inline] lf_advlock(ffff800000beaf60,0,fffffd8064acdd98,2,ffff80002e3bad10,40) at lf_advlock+0x21f sys/kern/vfs_lockf.c:281 VOP_ADVLOCK(fffffd807ea93c10,fffffd8064acdd98,2,ffff80002e3bad10,40) at VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:628 closef(fffffd80745e8d10,ffff8000fffef7a8) at closef+0xe5 fdfree(ffff8000fffef7a8) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffef7a8,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000fffef7a8,ffff80002e3bae80,ffff80002e3baee0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e3baf50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3baf50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6ff0, count: -8 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002e3bac60 rbx 0xdead4110dead4110 rdx 0 rcx 0x9 rax 0xffff8000fffef7a8 r8 0 r9 0x1 r10 0xbe97e75ca8ba3c37 r11 0x59176b96910a053c r12 0x2 r13 0xffffffffffffffff r14 0xffff800000beaf60 r15 0 rip 0xffffffff81c0284f lf_advlock+0x21f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e3babd0 ss 0 lf_advlock+0x21f: addl $0x1,0x28(%rbx) ddb{1}> show proc PROC (syz-executor.5) pid=446008 stat=onproc flags process=1018 proc=2000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002dd58010,0xffff8000fffeefd8 process=0xffff800029310448 user=0xffff80002e3b6000, vmspace=0xfffffd8068f7f8b8 estcpu=31, cpticks=0, pctcpu=0.8 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34515 205442 33914 32767 3 0x90 nanoslp syz-executor.1 34515 358767 33914 32767 3 0x4000090 fsleep syz-executor.1 44 115727 85915 32767 2 0x10 syz-executor.6 44 500855 85915 32767 3 0x4000010 lockflk syz-executor.6 44 18034 85915 32767 7 0x4000090 syz-executor.6 44 373068 85915 32767 3 0x4000090 fsleep syz-executor.6 38921 521407 35748 32767 2 0x10 syz-executor.7 38921 324146 35748 32767 3 0x4000090 fsleep syz-executor.7 85915 288273 87082 32767 3 0x90 nanoslp syz-executor.6 87082 413615 58507 0 3 0x82 wait syz-executor.6 86702 488654 20703 32767 3 0x90 piperd syz-executor.4 20703 6161 58507 0 3 0x82 wait syz-executor.4 36911 283303 11855 32767 3 0x90 nanoslp syz-executor.5 11855 167647 58507 0 3 0x82 wait syz-executor.5 35748 425645 8818 32767 3 0x90 nanoslp syz-executor.7 8818 317184 58507 0 3 0x82 wait syz-executor.7 19012 335989 0 0 3 0x14200 bored sosplice 71982 65319 98425 32767 3 0x90 piperd syz-executor.3 98425 372599 58507 0 3 0x82 wait syz-executor.3 71684 305436 37164 32767 3 0x90 nanoslp syz-executor.2 33914 419560 16213 32767 3 0x90 nanoslp syz-executor.1 37164 382164 58507 0 3 0x82 wait syz-executor.2 16213 368508 58507 0 3 0x82 wait syz-executor.1 1419 256909 69338 32767 3 0x90 nanoslp syz-executor.0 69338 14143 58507 0 3 0x82 wait syz-executor.0 58507 362901 78499 0 3 0x82 thrsleep syz-fuzzer 58507 200436 78499 0 3 0x4000082 thrsleep syz-fuzzer 58507 46771 78499 0 3 0x4000082 thrsleep syz-fuzzer 58507 81325 78499 0 3 0x4000082 thrsleep syz-fuzzer 58507 234180 78499 0 3 0x4000082 thrsleep syz-fuzzer 58507 9611 78499 0 3 0x4000082 thrsleep syz-fuzzer 58507 139646 78499 0 3 0x4000082 thrsleep syz-fuzzer 58507 315703 78499 0 3 0x4000082 kqread syz-fuzzer 58507 429914 78499 0 3 0x4000082 thrsleep syz-fuzzer 78499 350454 58385 0 3 0x10008a sigsusp ksh 58385 461040 15929 0 3 0x9a kqread sshd 25942 168936 1 0 3 0x100083 ttyin getty 15929 212587 1 0 3 0x88 kqread sshd 89782 185099 41613 73 3 0x1100090 kqread syslogd 41613 132995 1 0 3 0x100082 netio syslogd 47979 139996 1 0 3 0x100080 kqread resolvd 8144 236433 71713 77 3 0x100092 kqread dhcpleased 78454 106918 71713 77 3 0x100092 kqread dhcpleased 71713 506401 1 0 3 0x80 kqread dhcpleased 61781 268045 0 0 3 0x14200 bored smr 35639 490849 0 0 2 0x14200 zerothread 86742 86588 0 0 3 0x14200 aiodoned aiodoned 27953 440991 0 0 3 0x14200 syncer update 12157 268737 0 0 3 0x14200 cleaner cleaner 9970 31813 0 0 3 0x14200 reaper reaper 72826 510697 0 0 3 0x14200 pgdaemon pagedaemon 88316 369460 0 0 3 0x14200 bored viomb 21498 216954 0 0 3 0x40014200 acpi0 acpi0 11369 443951 0 0 3 0x40014200 idle1 84010 320183 0 0 3 0x14200 bored softnet 2955 422236 0 0 3 0x14200 bored systqmp 28866 215414 0 0 3 0x14200 bored systq 15876 319040 0 0 3 0x40014200 bored softclock 90627 521031 0 0 3 0x40014200 idle0 1 8650 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 6412K 6419K 78643K 11329 0 pcb 13 12K 14K 78643K 17 0 rtable 240 6K 7K 78643K 1705 0 ifaddr 81 17K 17K 78643K 153 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 76 0 ioctlops 0 0K 2K 78643K 386 0 iov 0 0K 36K 78643K 4033 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 10286 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 182 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 6771 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 109K 78643K 20105 0 sigio 0 0K 0K 78643K 404 0 proc 56 78K 115K 78643K 2411 0 subproc 104 6K 6K 78643K 234 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1903 0 in_multi 99 6K 7K 78643K 460 0 ether_multi 1 0K 0K 78643K 76 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 3720 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 337 87K 118K 78643K 130387 0 UVM aobj 131 8K 8K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 643 0 NDP 11 0K 2K 78643K 57 0 temp 124 4730K 4858K 78643K 51515 0 kqueue 12 18K 30K 78643K 3091 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 1878 0 1875 33 32 1 3 0 8 0 rtentry 112 252 0 139 4 0 4 4 0 8 0 unpcb 136 18896 0 18883 201 198 3 9 0 8 2 syncache 296 208 0 208 47 46 1 1 0 8 1 tcpqe 32 87 0 87 32 31 1 1 0 8 1 tcpcb 736 13360 0 13346 377 375 2 24 0 8 0 arp 120 42 0 24 1 0 1 1 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 7 0 7 2 2 0 1 0 8 0 inpcb 312 24305 0 24295 333 331 2 17 0 8 0 nd6 48 81 0 54 1 0 1 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 rttmrq 48 6 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1018 0 546 33 3 30 30 0 8 0 art_table 32 1019 0 546 4 0 4 4 0 8 0 art_node 16 251 0 148 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 6769 0 6759 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 33860 0 32366 94 0 94 94 0 8 0 ffsino 272 33860 0 32366 101 0 101 101 0 8 0 nchpl 144 61626 0 59991 63 0 63 63 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 223762 0 223762 8 7 1 2 0 8 1 percpumem 16 50 0 10 1 0 1 1 0 8 0 kstatmem 264 42 0 20 2 0 2 2 0 8 0 scxspl 216 173797 0 173797 77 75 2 8 0 8 2 plimitpl 152 4241 0 4215 21 19 2 2 0 8 0 sigapl 424 20360 0 20310 7 0 7 7 0 8 0 futexpl 64 196535 0 196532 7 6 1 1 0 8 0 knotepl 120 1938 0 0 19 2 17 17 0 8 0 kqueuepl 216 8634 0 8626 136 135 1 5 0 8 0 pipepl 336 4368 0 4340 134 129 5 9 0 8 2 fdescpl 496 20345 0 20312 7 2 5 6 0 8 0 filepl 152 171485 0 171231 315 302 13 19 0 8 3 lockfpl 104 27534 0 27532 3 2 1 2 0 8 0 lockfspl 48 4655 0 4653 1 0 1 1 0 8 0 sessionpl 144 33 0 17 1 0 1 1 0 8 0 pgrppl 48 134 0 118 1 0 1 1 0 8 0 ucredpl 96 50734 0 50716 1 0 1 1 0 8 0 zombiepl 144 20313 0 20310 3 2 1 1 0 8 0 processpl 1064 20360 0 20310 5 1 4 4 0 8 0 procpl 672 65882 0 65819 49 42 7 8 0 8 0 sosppl 168 1656 0 1656 38 37 1 1 0 8 1 sockpl 480 45579 0 45553 987 974 13 34 0 8 8 mcl64k 65536 58 0 0 5 1 4 4 0 8 0 mcl16k 16384 81 0 0 9 6 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 3 1 2 2 0 8 0 mcl8k 8192 81 0 0 8 5 3 3 0 8 0 mcl4k 4096 64 0 0 5 2 3 3 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 412 0 0 18 3 15 18 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 10395 0 0 581 0 581 581 0 8 0 bufpl 288 39781 0 33447 453 0 453 453 0 8 0 anonpl 24 4424635 0 4411584 461 358 103 136 0 186 0 amapchunkpl 152 454658 0 454097 409 376 33 47 0 158 6 amappl16 200 72588 0 72203 480 458 22 46 0 8 1 amappl15 192 4435 0 4432 1 0 1 1 0 8 0 amappl14 184 4773 0 4763 1 0 1 1 0 8 0 amappl13 176 2532 0 2529 1 0 1 1 0 8 0 amappl12 168 34 0 27 1 0 1 1 0 8 0 amappl11 160 3590 0 3573 1 0 1 1 0 8 0 amappl10 152 1574 0 1571 1 0 1 1 0 8 0 amappl9 144 4013 0 4007 1 0 1 1 0 8 0 amappl8 136 3534 0 3359 9 2 7 7 0 8 0 amappl7 128 2224 0 2212 1 0 1 1 0 8 0 amappl6 120 3816 0 3785 7 6 1 2 0 8 0 amappl5 112 15723 0 15705 1 0 1 1 0 8 0 amappl4 104 10505 0 10471 6 5 1 2 0 8 0 amappl3 96 65484 0 65430 2 0 2 2 0 8 0 amappl2 88 24269 0 24193 3 1 2 3 0 8 0 amappl1 80 504914 0 504233 53 36 17 19 0 8 1 amappl 88 128451 0 128281 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 128 253 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 20345 0 20312 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 20345 0 20312 1 0 1 1 0 8 0 vmmpekpl 168 176425 0 176366 4 1 3 4 0 8 0 vmmpepl 168 2041069 0 2038385 505 370 135 156 0 357 0 vmsppl 368 20344 0 20312 4 0 4 4 0 8 0 rwobjpl 56 535055 0 527535 141 30 111 115 0 8 0 pdppl 4096 40697 0 40624 620 539 81 89 0 8 8 pvpl 32 8321465 0 8302954 899 717 182 257 0 265 3 pmappl 248 20344 0 20312 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2790 0 1403 41 0 41 41 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff829acff0) 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 __mp_lock(ffffffff82af2f70) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82af2f70) at __mp_lock+0x129 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82af2f70,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff8000260c09a0,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 rwsleep(ffff80002dd582b0,ffffffff829ca3f0,120,ffffffff82593b81,0) at rwsleep+0xd5 sys/kern/kern_synch.c:317 futex_wait(7c4d3d1f760,3,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff80002dd582b0,ffff8000260c0b30,ffff8000260c0b90) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff8000260c0c00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260c0c00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c4f24bd8d0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at lf_advlock+0x21f: addl $0x1,0x28(%rbx) ddb{1}> trace lf_advlock(ffff800000beaf60,0,fffffd8064acdd98,2,ffff80002e3bad10,40) at lf_advlock+0x21f ls_ref sys/kern/vfs_lockf.c:140 [inline] lf_advlock(ffff800000beaf60,0,fffffd8064acdd98,2,ffff80002e3bad10,40) at lf_advlock+0x21f sys/kern/vfs_lockf.c:281 VOP_ADVLOCK(fffffd807ea93c10,fffffd8064acdd98,2,ffff80002e3bad10,40) at VOP_ADVLOCK+0x71 sys/kern/vfs_vops.c:628 closef(fffffd80745e8d10,ffff8000fffef7a8) at closef+0xe5 fdfree(ffff8000fffef7a8) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffef7a8,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000fffef7a8,ffff80002e3bae80,ffff80002e3baee0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002e3baf50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3baf50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6ff0, count: -8