kernel: protection fault trap, code=0 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace end trace frame: 0x0, count: -1 ddb{1}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff80003c3fac98 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 0xffff80003c432ec8 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{1}> show proc PROC (syz-executor) tid=51159 pid=60461 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffeed10,0xffffffff83a699f8 process=0xffff800038bc6b70 user=0xffff80003c42e000, vmspace=0xfffffd800dc59208 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60461 157809 15185 0 7 0 syz-executor *60461 51159 15185 0 7 0x4000000 syz-executor 9693 41630 18953 0 2 0 syz-executor 9693 114369 18953 0 3 0x4000080 fsleep syz-executor 27673 124168 76197 0 2 0 syz-executor 27673 137285 76197 0 3 0x4000080 fsleep syz-executor 75090 417686 90240 -1 2 0x10 syz-executor 75090 439193 90240 -1 3 0x4000090 ttyin syz-executor 75090 94252 90240 -1 3 0x4000090 fsleep syz-executor 75090 314115 90240 -1 3 0x4000090 fsleep syz-executor 66583 105840 358 60929 3 0x90 nanoslp syz-executor 66583 361003 358 60929 3 0x4000090 ttyout syz-executor 66583 339115 358 60929 3 0x4000090 fsleep syz-executor 71208 250149 26956 0 3 0x80 nanoslp syz-executor 71208 252884 26956 0 3 0x4000080 sbwait syz-executor 71208 240049 26956 0 3 0x4000080 fsleep syz-executor 23141 203299 0 0 3 0x14200 acct acct 90240 345967 70798 0 3 0x82 nanoslp syz-executor 77118 478817 33141 0 3 0x3000 suspend syz-executor 77118 202251 33141 0 3 0x4081000 biowait syz-executor 15185 161188 70798 0 3 0x82 nanoslp syz-executor 358 303426 70798 0 3 0x82 nanoslp syz-executor 18953 338789 70798 0 3 0x82 nanoslp syz-executor 57653 301038 1 0 3 0x100083 ttyopn getty 4609 267702 0 0 3 0x14280 nfsidl nfsio 18366 438212 0 0 3 0x14280 nfsidl nfsio 75249 399363 0 0 3 0x14280 nfsidl nfsio 98699 314823 0 0 3 0x14280 nfsidl nfsio 26784 503457 0 0 3 0x14280 nfsidl nfsio 75706 216058 0 0 3 0x14280 nfsidl nfsio 45639 379949 0 0 3 0x14280 nfsidl nfsio 83804 282929 0 0 3 0x14280 nfsidl nfsio 71211 337138 0 0 3 0x14280 nfsidl nfsio 2710 110788 0 0 3 0x14280 nfsidl nfsio 96154 111477 0 0 3 0x14280 nfsidl nfsio 99133 152559 0 0 3 0x14280 nfsidl nfsio 71193 417076 0 0 3 0x14280 nfsidl nfsio 42890 347991 0 0 3 0x14280 nfsidl nfsio 98831 446057 0 0 3 0x14280 nfsidl nfsio 12055 372518 0 0 3 0x14280 nfsidl nfsio 36687 62713 0 0 3 0x14280 nfsidl nfsio 92467 316926 0 0 3 0x14280 nfsidl nfsio 66219 431222 0 0 3 0x14280 nfsidl nfsio 2334 25080 0 0 3 0x14280 nfsidl nfsio 98120 455117 88784 0 3 0x100082 sbwait arp 88784 358564 92421 0 3 0x10008a sigsusp sh 33141 138838 70798 0 3 0x82 nanoslp syz-executor 26956 249321 70798 0 3 0x82 nanoslp syz-executor 92421 28090 70798 0 3 0x82 wait syz-executor 76197 446101 70798 0 3 0x82 nanoslp syz-executor 70798 366304 75438 0 3 0x82 kqread syz-executor 75438 342755 89897 0 3 0x10008a sigsusp ksh 89897 355924 82415 0 3 0x98 kqread sshd-session 82415 114062 55350 0 3 0x92 kqread sshd-session 55350 523277 1 0 3 0x88 kqread sshd 16441 455209 51744 74 3 0x1100092 bpf pflogd 51744 215616 1 0 3 0x80 sbwait pflogd 91267 399069 75664 73 3 0x1100090 kqread syslogd 75664 396769 1 0 3 0x100082 sbwait syslogd 98634 309397 1 0 3 0x100080 kqread resolvd 74880 143727 36440 77 3 0x100092 kqread dhcpleased 86425 76048 36440 77 3 0x100092 kqread dhcpleased 36440 425497 1 0 3 0x80 kqread dhcpleased 68196 342181 0 0 3 0x14200 bored smr 75995 187977 0 0 3 0x14200 pgzero zerothread 66213 38878 0 0 3 0x14200 aiodoned aiodoned 23448 391775 0 0 3 0x14200 syncer update 45950 174232 0 0 3 0x14200 cleaner cleaner 501 168686 0 0 3 0x14200 reaper reaper 13204 99805 0 0 3 0x14200 pgdaemon pagedaemon 40901 215376 0 0 3 0x14200 bored viomb 93730 130110 0 0 3 0x40014200 acpi0 acpi0 75628 342636 0 0 3 0x40014200 idle1 2883 432571 0 0 3 0x14200 bored softnet1 65988 254599 0 0 3 0x14200 bored softnet0 25322 368532 0 0 3 0x14200 bored systqmp 66541 432632 0 0 3 0x14200 bored systq 37594 187210 0 0 3 0x14200 tmoslp softclockmp 25747 251220 0 0 3 0x40014200 tmoslp softclock 95597 417226 0 0 3 0x40014200 idle0 1 173743 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 60461 (syz-executor) thread 0xffff80003c3e9a18 (51159) exclusive rwlock vcpu r = 0 (0xffff80003c3fa9f0) #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 71208 (syz-executor) thread 0xffff80003a3d02d0 (252884) exclusive rwlock sbufrcv r = 0 (0xffff8000016e6d98) #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:890 #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:783 #7 Xsyscall+0x128 Process 77118 (syz-executor) thread 0xffff80003a3d1790 (202251) exclusive rrwlock inode r = 0 (0xfffffd8067f777b8) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11059 12166K 14032K 166960K 13470 0 pcb 19 15K 16K 166960K 338 0 rtable 164 9K 10K 166960K 683 0 pf 32 17K 81K 166960K 255 0 ifaddr 28 4K 7K 166960K 121 0 ifgroup 40 1K 2K 166960K 209 0 sysctl 4 1K 9K 166960K 12 0 counters 64 36K 37K 166960K 200 0 ioctlops 0 0K 4K 166960K 1889 0 iov 1 4K 32K 166960K 100 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1434 90K 91K 166960K 2612 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 25 17K 17K 166960K 46 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 244K 166960K 1420 0 sigio 0 0K 0K 166960K 82 0 proc 73 115K 164K 166960K 797 0 subproc 72 4K 4K 166960K 119 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 249 0 in_multi 52 3K 6K 166960K 183 0 ether_multi 1 0K 0K 166960K 19 0 mrt 2 0K 0K 166960K 42 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 687 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 264 163K 180K 166960K 14539 0 UVM aobj 106 25K 25K 166960K 111 0 pinsyscall 45 90K 104K 166960K 2739 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 127 0 NDP 9 0K 1K 166960K 85 0 temp 80 9088K 9159K 166960K 59214 0 kqueue 17 28K 28K 166960K 258 0 SYN cache 2 8K 16K 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 120 158 0 152 2 1 1 2 0 8 0 rtentry 176 203 0 147 5 0 5 5 0 8 0 unpcb 144 902 0 881 9 3 6 6 0 8 5 syncache 336 11 0 11 2 1 1 1 0 8 1 tcpcb 736 308 0 300 1 0 1 1 0 8 0 arp 136 32 0 20 1 0 1 1 0 8 0 inpcb 328 1310 0 1296 12 10 2 7 0 8 0 nd6 152 42 0 31 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1192 45 0 45 2 1 1 1 0 8 1 pppxif 1504 8 0 8 3 3 0 1 0 8 0 pfstscr 40 2 0 2 2 2 0 1 0 8 0 pffrag 232 10 0 5 1 0 1 1 0 482 0 pffrnode 88 9 0 5 1 0 1 1 0 8 0 pffrent 40 18 0 13 1 0 1 1 0 8 0 pfosfp 40 1430 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfrktable 1344 4 0 2 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 119 0 58 1 0 1 1 0 8 0 pfstkey 128 124 0 63 2 0 2 2 0 8 0 pfstate 448 122 0 61 10 0 10 10 0 8 2 pfrule 1360 96 0 89 2 1 1 2 0 8 0 rttmr 136 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 816 0 552 32 5 27 28 0 8 5 art_table 40 820 0 552 5 0 5 5 0 8 0 art_node 32 199 0 148 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 9 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 38 0 15 1 0 1 1 0 8 0 shmpl 112 98 0 5 3 0 3 3 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 4098 0 2629 93 0 93 93 0 8 0 ffsino 296 4098 0 2629 114 0 114 114 0 8 0 nchpl 144 6003 0 4285 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 vnodes 216 4837 0 0 269 0 269 269 0 8 0 namei 1024 20662 0 20662 2 1 1 2 0 8 1 percpumem 16 115 0 68 1 0 1 1 0 8 0 vcpupl 3968 10 0 0 2 0 2 2 0 8 0 vmpool 848 10 0 0 2 0 2 2 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 124 0 104 3 1 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 3 2 1 1 0 8 1 scxspl 216 28232 0 28231 9 8 1 6 1 8 0 plimitpl 152 339 0 319 1 0 1 1 0 8 0 sigapl 424 1749 0 1679 9 0 9 9 0 8 0 knotepl 120 573 0 0 17 0 17 17 0 8 0 kqueuepl 224 655 0 642 14 9 5 5 0 8 4 pipepl 344 212 0 185 3 0 3 3 0 8 0 fdescpl 528 1708 0 1675 3 0 3 3 0 8 0 filepl 160 10427 0 10187 24 6 18 18 0 8 7 lockfpl 104 628 0 625 2 1 1 2 0 8 0 lockfspl 48 193 0 190 1 0 1 1 0 8 0 sessionpl 144 35 0 26 1 0 1 1 0 8 0 pgrppl 48 69 0 52 1 0 1 1 0 8 0 ucredpl 104 1556 0 1541 1 0 1 1 0 8 0 zombiepl 144 1680 0 1679 1 0 1 1 0 8 0 processpl 1232 1749 0 1679 6 0 6 6 0 8 0 procpl 664 3826 0 3745 8 0 8 8 0 8 0 sosppl 176 15 0 15 3 2 1 1 0 8 1 sockpl 752 2418 0 2377 30 19 11 17 0 8 6 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1166 0 0 72 0 72 72 0 8 0 bufpl 280 10120 0 3990 439 0 439 439 0 8 0 anonpl 32 13167 0 0 107 0 107 107 0 246 0 amapchunkpl 152 48204 0 47428 38 8 30 32 0 158 0 amappl16 200 6156 0 5872 47 21 26 28 0 8 11 amappl15 192 17 0 17 1 1 0 1 0 8 0 amappl14 184 537 0 534 1 0 1 1 0 8 0 amappl13 176 152 0 139 1 0 1 1 0 8 0 amappl12 168 1995 0 1963 2 0 2 2 0 8 0 amappl11 160 11 0 11 2 2 0 1 0 8 0 amappl10 152 65 0 50 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 127 0 124 1 0 1 1 0 8 0 amappl7 128 174 0 159 1 0 1 1 0 8 0 amappl6 120 208 0 205 1 0 1 1 0 8 0 amappl5 112 119 0 108 1 0 1 1 0 8 0 amappl4 104 344 0 321 1 0 1 1 0 8 0 amappl3 96 9825 0 9701 4 0 4 4 0 8 0 amappl2 88 664 0 600 2 0 2 2 0 8 0 amappl1 80 18156 0 17517 19 2 17 17 0 8 2 amappl 88 13463 0 13274 5 0 5 5 0 92 0 uvmvnodes 80 143 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 128 256 0 256 4 3 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 110 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1708 0 1675 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1708 0 1675 1 0 1 1 0 8 0 vmmpekpl 168 15604 0 15560 3 0 3 3 0 8 0 vmmpepl 168 118669 0 116374 123 15 108 117 0 357 6 vmsppl 488 1707 0 1675 5 0 5 5 0 8 0 rwobjpl 80 34749 0 33233 40 5 35 35 0 8 2 pdppl 4096 3443 0 3360 129 44 85 87 0 8 2 pvpl 32 19787 0 0 160 0 160 160 0 265 0 pmappl 256 1717 0 1675 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 378 0 54 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8390eff0) 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: 0x72657c4a08f0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at done_flush+0x38: movl %eax,%dr6 ddb{1}> trace end trace frame: 0x0, count: -1