kernel: protection fault trap, code=0 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace end trace frame: 0x0, count: -1 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff80003c40fa18 rbp 0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffc r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0 r11 0 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff811954bb done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80003c41ae08 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor) tid=446399 pid=91468 tcnt=2 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=0xffff80003a3f9258,0xffffffff838b93f0 process=0xffff8000fffec018 user=0xffff80003c416000, vmspace=0xfffffd805e1d15e0 estcpu=36, cpticks=105, pctcpu=0.55, user=0, sys=105, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91468 129749 65228 0 7 0 syz-executor *91468 446399 65228 0 7 0x4000000 syz-executor 21590 216082 26288 0 3 0x80 fsleep syz-executor 21590 278636 26288 0 3 0x4000080 rest syz-executor 31760 480409 90226 0 3 0x80 fsleep syz-executor 31760 17233 90226 0 3 0x4000080 ttyin syz-executor 27180 37034 92161 0 3 0x80 fsleep syz-executor 27180 266313 92161 0 3 0x4000080 sbwait syz-executor 72974 276965 62079 0 3 0x80 fsleep syz-executor 72974 125876 62079 0 3 0x4000080 ttyin syz-executor 31382 398397 68355 0 3 0x80 fsleep syz-executor 31382 17059 68355 0 3 0x4000080 sbwait syz-executor 67656 318531 58012 0 3 0x80 fsleep syz-executor 67656 94045 58012 0 3 0x4000080 kqread syz-executor 58012 286177 6586 0 3 0x82 nanoslp syz-executor 13347 428466 0 0 3 0x14200 acct acct 68355 437996 6586 0 3 0x82 nanoslp syz-executor 90226 138030 6586 0 3 0x82 nanoslp syz-executor 62079 43392 6586 0 3 0x82 nanoslp syz-executor 65228 76509 6586 0 3 0x82 nanoslp syz-executor 92161 347609 6586 0 3 0x82 nanoslp syz-executor 26288 523114 6586 0 3 0x82 nanoslp syz-executor 93272 248851 6586 0 3 0x2 biowait syz-executor 6586 135763 94070 0 3 0x82 kqread syz-executor 94070 85226 56773 0 3 0x10008a sigsusp ksh 56773 209560 28208 0 3 0x98 kqread sshd-session 28208 184087 7083 0 3 0x92 kqread sshd-session 726 313292 1 0 3 0x100083 ttyin getty 7083 373224 1 0 3 0x88 kqread sshd 67378 517137 59162 74 3 0x1100092 bpf pflogd 59162 453371 1 0 3 0x80 sbwait pflogd 88902 491044 16997 73 3 0x1100090 kqread syslogd 16997 13553 1 0 3 0x100082 sbwait syslogd 57766 92533 1 0 3 0x100080 kqread resolvd 48372 426553 84962 77 3 0x100092 kqread dhcpleased 2312 150792 84962 77 3 0x100092 kqread dhcpleased 84962 441409 1 0 3 0x80 kqread dhcpleased 80625 418524 0 0 3 0x14200 bored smr 56776 170213 0 0 3 0x14200 pgzero zerothread 50067 455634 0 0 3 0x14200 aiodoned aiodoned 97439 19450 0 0 3 0x14200 syncer update 6317 33780 0 0 3 0x14200 cleaner cleaner 64211 204727 0 0 3 0x14200 reaper reaper 65710 339622 0 0 3 0x14200 pgdaemon pagedaemon 59897 137293 0 0 3 0x14200 bored viomb 25609 251149 0 0 3 0x40014200 acpi0 acpi0 99082 335070 0 0 3 0x40014200 idle1 25348 300704 0 0 3 0x14200 bored softnet1 28130 430899 0 0 3 0x14200 bored softnet0 18587 362630 0 0 3 0x14200 bored systqmp 97813 232084 0 0 3 0x14200 bored systq 52225 27914 0 0 3 0x14200 tmoslp softclockmp 84035 254502 0 0 3 0x40014200 tmoslp softclock 90001 404806 0 0 3 0x40014200 idle0 1 143995 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 91468 (syz-executor) thread 0xffff80003a3f8d28 (446399) exclusive rwlock vcpu r = 0 (0xffff80003c40f770) #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_run+0xa2 sys/arch/amd64/amd64/vmm_machdep.c:-1 #3 vmmioctl+0x337 sys/dev/vmm/vmm.c:254 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 Process 31382 (syz-executor) thread 0xffff8000fffe9248 (17059) exclusive rwlock sbufrcv r = 0 (0xffff800001496108) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:878 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 Process 93272 (syz-executor) thread 0xffff8000ffffc538 (248851) exclusive rrwlock inode r = 0 (0xfffffd806e9c8d60) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #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:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cf5b8e8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10197 11031K 12486K 166960K 12048 0 pcb 17 17K 19K 166960K 208 0 rtable 181 7K 8K 166960K 465 0 pf 33 17K 82K 166960K 112 0 ifaddr 35 6K 7K 166960K 87 0 ifgroup 47 2K 2K 166960K 131 0 sysctl 4 1K 9K 166960K 14 0 counters 66 36K 37K 166960K 222 0 ioctlops 0 0K 4K 166960K 1626 0 iov 2 16K 28K 166960K 47 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1491 94K 94K 166960K 1958 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 93 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 114K 166960K 822 0 sigio 0 0K 0K 166960K 15 0 proc 73 131K 164K 166960K 631 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 101 0 in_multi 73 5K 7K 166960K 145 0 ether_multi 1 0K 0K 166960K 8 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 688 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 234 168K 183K 166960K 9184 0 UVM aobj 21 8K 8K 166960K 21 0 pinsyscall 42 84K 104K 166960K 1983 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 10 0K 1K 166960K 57 0 temp 53 8670K 8739K 166960K 28881 0 kqueue 13 20K 30K 166960K 168 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> 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 88 0 83 1 0 1 1 0 8 0 rtentry 176 141 0 67 5 0 5 5 0 8 0 unpcb 144 524 0 499 7 5 2 6 0 8 1 syncache 336 6 0 6 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 160 0 155 1 0 1 1 0 8 0 arp 136 22 0 7 1 0 1 1 0 8 0 inpcb 328 1115 0 1105 12 7 5 12 0 8 3 nd6 152 28 0 11 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 2 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1192 67 0 67 1 0 1 1 0 8 1 pppxif 1504 37 0 37 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 48 0 39 1 0 1 1 0 482 0 pffrnode 88 48 0 39 1 0 1 1 0 8 0 pffrent 40 100 0 91 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 60 0 27 1 0 1 1 0 8 0 pfstkey 128 62 0 29 2 0 2 2 0 8 0 pfstate 448 60 0 28 5 0 5 5 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 656 0 313 28 5 23 28 0 8 1 art_table 40 658 0 313 5 0 5 5 0 8 0 art_node 32 140 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semapl 112 91 0 81 1 0 1 1 0 8 0 shmpl 112 15 0 0 1 0 1 1 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 2853 0 1349 95 0 95 95 0 8 0 ffsino 296 2853 0 1349 117 0 117 117 0 8 0 nchpl 144 3990 0 2286 64 0 64 64 0 8 0 rtmask 32 8 0 8 3 3 0 1 0 8 0 vnodes 216 3294 0 0 183 0 183 183 0 8 0 namei 1024 13380 0 13379 1 0 1 1 0 8 0 percpumem 16 126 0 78 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 840 3 0 0 1 0 1 1 0 8 0 kstatmem 264 78 0 56 3 1 2 3 0 8 0 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 23458 0 23457 11 10 1 8 1 8 0 plimitpl 152 196 0 178 1 0 1 1 0 8 0 sigapl 424 1146 0 1098 8 2 6 8 0 8 0 knotepl 120 560 0 0 17 0 17 17 0 8 0 kqueuepl 224 336 0 326 5 3 2 5 0 8 1 pipepl 344 179 0 152 3 0 3 3 0 8 0 fdescpl 528 1109 0 1078 3 0 3 3 0 8 0 filepl 160 6674 0 6444 20 8 12 18 0 8 2 lockfpl 104 199 0 197 1 0 1 1 0 8 0 lockfspl 48 93 0 91 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 705 0 692 1 0 1 1 0 8 0 zombiepl 144 1098 0 1098 1 0 1 1 0 8 1 processpl 1232 1146 0 1098 6 2 4 6 0 8 0 procpl 664 2241 0 2186 8 2 6 8 0 8 0 sosppl 176 8 0 8 1 1 0 1 0 8 0 sockpl 752 1756 0 1716 24 16 8 18 0 8 4 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 1 14 15 0 8 0 mcl2k 2048 56 0 0 7 1 6 7 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1551 0 0 97 0 97 97 0 8 0 bufpl 280 10253 0 4117 439 0 439 439 0 8 0 anonpl 32 11622 0 0 94 0 94 94 0 246 0 amapchunkpl 152 30116 0 29652 30 5 25 29 0 158 5 amappl16 200 4430 0 4394 46 33 13 28 0 8 8 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 8 0 8 1 1 0 1 0 8 0 amappl13 176 442 0 441 1 0 1 1 0 8 0 amappl12 168 1481 0 1439 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 46 0 32 1 0 1 1 0 8 0 amappl9 144 304 0 304 1 1 0 1 0 8 0 amappl8 136 66 0 64 1 0 1 1 0 8 0 amappl7 128 87 0 86 1 0 1 1 0 8 0 amappl6 120 319 0 305 1 0 1 1 0 8 0 amappl5 112 78 0 68 1 0 1 1 0 8 0 amappl4 104 435 0 404 1 0 1 1 0 8 0 amappl3 96 5751 0 5645 3 0 3 3 0 8 0 amappl2 88 569 0 510 2 0 2 2 0 8 0 amappl1 80 12631 0 12030 16 1 15 16 0 8 0 amappl 88 8305 0 8149 6 1 5 5 0 92 1 uvmvnodes 80 127 0 0 3 0 3 3 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 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 20 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1109 0 1078 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1109 0 1078 1 0 1 1 0 8 0 vmmpekpl 168 10499 0 10453 3 0 3 3 0 8 0 vmmpepl 168 77496 0 75575 111 5 106 108 0 357 14 vmsppl 488 1108 0 1078 7 2 5 5 0 8 1 rwobjpl 80 23545 0 22472 35 4 31 33 0 8 2 pdppl 4096 2232 0 2159 104 29 75 84 0 8 2 pvpl 32 19577 0 0 159 1 158 158 0 265 0 pmappl 256 1111 0 1078 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 371 0 42 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace end trace frame: 0x0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 end of kernel end trace frame: 0x7dc81557aae0, count: -3