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 0xffff80003c404b98 rbp 0 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0x100000001 r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0 r11 0 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff826ee1ab done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff80002a311a88 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor) tid=253352 pid=94095 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a3d2800,0xffffffff83a699f8 process=0xffff80003c48b9e8 user=0xffff80002a30d000, vmspace=0xfffffd800b063d58 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94095 198607 19042 0 2 0 syz-executor *94095 253352 19042 0 7 0x4000000 syz-executor 65357 206786 3890 0 3 0x80 fsleep syz-executor 65357 376980 3890 0 2 0x4000000 syz-executor 86491 340256 47407 0 2 0 syz-executor 28540 362715 92965 0 2 0 syz-executor 30577 171185 8858 0 3 0x80 fsleep syz-executor 30577 141004 8858 0 2 0x4000000 syz-executor 70172 372636 32269 0 3 0x80 fsleep syz-executor 70172 204975 32269 0 2 0x4000000 syz-executor 69908 154446 26197 0 3 0x80 fsleep syz-executor 69908 24937 26197 0 3 0x4000080 ttyin syz-executor 47407 191692 67196 0 2 0xc82 syz-executor 92965 368058 67196 0 3 0x82 nanoslp syz-executor 3890 101032 67196 0 2 0xc82 syz-executor 26197 272892 67196 0 2 0xc82 syz-executor 19042 505200 67196 0 2 0xc82 syz-executor 32269 483067 67196 0 2 0xc82 syz-executor 66198 314943 1 0 3 0x100083 ttyin getty 8858 260244 67196 0 2 0xc82 syz-executor 40199 489022 0 0 3 0x14280 nfsidl nfsio 5244 32408 0 0 3 0x14280 nfsidl nfsio 19816 268597 0 0 3 0x14280 nfsidl nfsio 52747 399036 0 0 3 0x14280 nfsidl nfsio 79489 330965 0 0 3 0x14280 nfsidl nfsio 89159 103184 0 0 3 0x14280 nfsidl nfsio 54119 472108 0 0 3 0x14280 nfsidl nfsio 61090 15237 0 0 3 0x14280 nfsidl nfsio 88437 97043 0 0 3 0x14280 nfsidl nfsio 21253 59256 0 0 3 0x14280 nfsidl nfsio 44842 416818 0 0 3 0x14280 nfsidl nfsio 62835 341007 0 0 3 0x14280 nfsidl nfsio 74438 255475 0 0 3 0x14280 nfsidl nfsio 14629 431901 0 0 3 0x14280 nfsidl nfsio 13256 161505 0 0 3 0x14280 nfsidl nfsio 20489 430800 0 0 3 0x14280 nfsidl nfsio 19108 135646 0 0 3 0x14280 nfsidl nfsio 16384 28139 0 0 3 0x14280 nfsidl nfsio 43161 436406 0 0 3 0x14280 nfsidl nfsio 55734 38202 0 0 3 0x14280 nfsidl nfsio 86193 92190 82523 0 3 0x100082 sbwait arp 82523 321000 1 0 3 0x10008a sigsusp sh 10908 435571 67196 0 3 0x82 wait syz-executor 67196 417054 86120 0 3 0x82 kqread syz-executor 86120 16858 37008 0 3 0x10008a sigsusp ksh 37008 114261 39809 0 3 0x98 kqread sshd-session 39809 191389 90236 0 3 0x92 kqread sshd-session 90236 89014 1 0 3 0x88 kqread sshd 94774 179738 34639 74 3 0x1100092 bpf pflogd 34639 289088 1 0 3 0x80 sbwait pflogd 55952 150424 5389 73 3 0x1100090 kqread syslogd 5389 469543 1 0 3 0x100082 sbwait syslogd 4828 348554 1 0 3 0x100080 kqread resolvd 89425 161455 86836 77 3 0x100092 kqread dhcpleased 19056 165162 86836 77 3 0x100092 kqread dhcpleased 86836 270046 1 0 3 0x80 kqread dhcpleased 35606 486829 0 0 3 0x14200 bored smr 39891 203559 0 0 2 0x14200 zerothread 9586 491530 0 0 3 0x14200 aiodoned aiodoned 80540 236427 0 0 3 0x14200 syncer update 54721 174773 0 0 3 0x14200 cleaner cleaner 53905 177526 0 0 3 0x14200 reaper reaper 63400 496378 0 0 3 0x14200 pgdaemon pagedaemon 76003 283862 0 0 3 0x14200 bored viomb 74680 194805 0 0 3 0x40014200 acpi0 acpi0 81504 399834 0 0 7 0x40014200 idle1 53367 259254 0 0 3 0x14200 bored softnet1 21679 230404 0 0 3 0x14200 bored softnet0 76662 468718 0 0 3 0x14200 bored systqmp 93515 50024 0 0 3 0x14200 bored systq 80412 91933 0 0 3 0x14200 tmoslp softclockmp 58836 3507 0 0 3 0x40014200 tmoslp softclock 92653 351222 0 0 3 0x40014200 idle0 1 73930 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 94095 (syz-executor) thread 0xffff80003a3d3cc0 (253352) exclusive rwlock vcpu r = 0 (0xffff80003c4048f0) #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:783 #8 Xsyscall+0x128 Process 70172 (syz-executor) thread 0xffff8000fffef770 (204975) exclusive rrwlock inode r = 0 (0xfffffd806c8a6438) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11093 12173K 13245K 166960K 13926 0 pcb 19 15K 16K 166960K 410 0 rtable 255 13K 13K 166960K 976 0 pf 44 19K 83K 166960K 235 0 ifaddr 41 7K 7K 166960K 162 0 ifgroup 60 2K 2K 166960K 273 0 sysctl 4 1K 9K 166960K 10 0 counters 74 37K 38K 166960K 660 0 ioctlops 0 0K 4K 166960K 2112 0 iov 0 0K 20K 166960K 77 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1453 91K 92K 166960K 2887 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 153 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 244K 166960K 1645 0 sigio 0 0K 0K 166960K 82 0 proc 73 115K 180K 166960K 938 0 subproc 81 5K 5K 166960K 163 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 307 0 in_multi 85 6K 6K 166960K 269 0 ether_multi 1 0K 0K 166960K 13 0 mrt 1 0K 0K 166960K 40 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 753 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 163K 192K 166960K 16275 0 UVM aobj 54 16K 16K 166960K 56 0 pinsyscall 46 92K 104K 166960K 3127 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 140 0 NDP 14 0K 1K 166960K 116 0 temp 113 9087K 9340K 166960K 85206 0 kqueue 13 20K 32K 166960K 324 0 SYN cache 2 16K 16K 166960K 2 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 120 182 0 178 2 1 1 2 0 8 0 rtentry 176 295 0 197 5 0 5 5 0 8 0 unpcb 144 1010 0 993 10 6 4 6 0 8 3 syncache 336 14 0 14 6 5 1 1 0 8 1 tcpqe 32 4 0 4 4 4 0 1 0 8 0 tcpcb 736 495 0 487 10 8 2 7 0 8 1 arp 136 41 0 23 1 0 1 1 0 8 0 inpcb 328 2096 0 2083 26 20 6 10 0 8 4 nd6 152 61 0 37 1 0 1 1 0 8 0 pkpcb 40 8 0 8 4 4 0 1 0 8 0 kcovpl 48 18 0 9 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 261 0 261 4 3 1 1 0 8 1 pppxif 1504 8 0 8 3 3 0 1 0 8 0 pfstscr 40 65 0 65 1 1 0 1 0 8 0 pffrag 232 29 0 25 1 0 1 1 0 482 0 pffrnode 88 28 0 24 1 0 1 1 0 8 0 pffrent 40 53 0 48 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 2 0 1 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 276 0 192 1 0 1 1 0 8 0 pfstkey 128 344 0 261 4 0 4 4 0 8 0 pfstate 448 341 0 259 17 0 17 17 0 8 4 pfrule 1360 30 0 23 2 1 1 2 0 8 0 rttmr 136 3 0 3 3 3 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1169 0 759 37 11 26 28 0 8 0 art_table 40 1172 0 759 6 1 5 5 0 8 0 art_node 32 295 0 208 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 151 0 141 1 0 1 1 0 8 0 shmpl 112 48 0 2 2 0 2 2 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 4482 0 3010 94 1 93 93 0 8 0 ffsino 296 4482 0 3010 114 0 114 114 0 8 0 nchpl 144 6610 0 4882 65 0 65 65 0 8 0 rtmask 32 15 0 15 3 2 1 1 0 8 1 vnodes 216 5354 0 0 298 0 298 298 0 8 0 namei 1024 24247 0 24247 3 2 1 1 0 8 1 percpumem 16 345 0 293 1 0 1 1 0 8 0 vcpupl 3968 5 0 0 1 0 1 1 0 8 0 vmpool 848 5 0 0 1 0 1 1 0 8 0 kstatmem 264 168 0 134 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 39328 0 39328 12 10 2 8 1 8 2 plimitpl 152 668 0 648 1 0 1 1 0 8 0 sigapl 424 1962 0 1892 10 1 9 9 0 8 1 knotepl 120 526 0 0 16 0 16 16 0 8 0 kqueuepl 224 524 0 514 5 3 2 3 0 8 1 pipepl 344 401 0 371 15 11 4 9 0 8 0 fdescpl 528 1924 0 1890 3 0 3 3 0 8 0 filepl 160 12680 0 12439 29 15 14 19 0 8 2 lockfpl 104 625 0 623 2 1 1 2 0 8 0 lockfspl 48 201 0 199 1 0 1 1 0 8 0 sessionpl 144 44 0 35 1 0 1 1 0 8 0 pgrppl 48 143 0 125 1 0 1 1 0 8 0 ucredpl 104 2116 0 2103 1 0 1 1 0 8 0 zombiepl 144 2180 0 2179 2 1 1 1 0 8 0 processpl 1232 1962 0 1892 6 0 6 6 0 8 0 procpl 664 4223 0 4148 8 0 8 8 0 8 0 sosppl 176 11 0 11 4 4 0 1 0 8 0 sockpl 752 3352 0 3318 42 31 11 21 0 8 5 mcl64k 65536 3 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 50 0 0 7 0 7 7 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1850 0 0 114 0 114 114 0 8 0 bufpl 280 15045 0 8915 439 0 439 439 0 8 0 anonpl 32 19687 0 0 159 0 159 159 0 246 0 amapchunkpl 152 54862 0 54269 47 16 31 33 0 158 5 amappl16 200 8249 0 7799 84 49 35 51 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 541 0 539 1 0 1 1 0 8 0 amappl13 176 177 0 163 1 0 1 1 0 8 0 amappl12 168 2225 0 2193 2 0 2 2 0 8 0 amappl11 160 26 0 25 1 0 1 1 0 8 0 amappl10 152 68 0 53 1 0 1 1 0 8 0 amappl9 144 267 0 267 1 1 0 1 0 8 0 amappl8 136 180 0 177 1 0 1 1 0 8 0 amappl7 128 253 0 239 1 0 1 1 0 8 0 amappl6 120 264 0 260 1 0 1 1 0 8 0 amappl5 112 125 0 113 1 0 1 1 0 8 0 amappl4 104 374 0 352 1 0 1 1 0 8 0 amappl3 96 11142 0 11025 4 0 4 4 0 8 0 amappl2 88 762 0 699 2 0 2 2 0 8 0 amappl1 80 21295 0 20657 18 1 17 17 0 8 0 amappl 88 15030 0 14856 5 0 5 5 0 92 0 uvmvnodes 80 151 0 0 4 0 4 4 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 8 0 8 3 3 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 55 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1924 0 1890 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1924 0 1890 1 0 1 1 0 8 0 vmmpekpl 168 17999 0 17932 4 0 4 4 0 8 0 vmmpepl 168 138227 0 135763 171 51 120 129 0 357 3 vmsppl 488 1923 0 1890 5 0 5 5 0 8 0 rwobjpl 80 41288 0 39678 56 18 38 42 0 8 0 pdppl 4096 3865 0 3785 139 57 82 84 0 8 2 pvpl 32 25954 0 0 210 0 210 210 0 265 0 pmappl 256 1928 0 1890 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 461 0 89 11 0 11 11 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(ffff8000299bdff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299bdff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5