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 done_flush() at done_flush+0x38 vm_run(ffff8000244ddad0) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4295 vmmioctl(a00,c0205602,ffff8000244ddad0,1,ffff8000212342a0) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806e07c2f0,c0205602,ffff8000244ddad0,1,fffffd807f7d7600,ffff8000212342a0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80682183a8,c0205602,ffff8000244ddad0,ffff8000212342a0) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000212342a0,ffff8000244ddbe8,ffff8000244ddc40) at sys_ioctl+0x4a2 syscall(ffff8000244ddcb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000244ddcb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeae213f1900, count: -8 ddb{0}> show registers rdi 0x6c14 __ALIGN_SIZE+0x5c14 rsi 0xffff80002127de38 rbp 0xffff8000244dd840 rbx 0x756e6547 rdx 0x49656e69 rcx 0x6c65746e rax 0xfffffffffffffffe r8 0 r9 0x10000 __ALIGN_SIZE+0xf000 r10 0x85306e114b136d78 r11 0x8d0e8fa9dd721d38 r12 0xffffffff827680f0 dt_prov_static r13 0x246 r14 0xffff80002127d800 r15 0xffff8000244ddad0 rip 0xffffffff8102e7d0 done_flush+0x38 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0xffff8000244dd696 ss 0x10 done_flush+0x38: movl %eax,%dr6 ddb{0}> show proc PROC (syz-executor.0) pid=121113 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800021234d20,0xffffffff8287ff28 process=0xffff8000ffffadc0 user=0xffff8000244d8000, vmspace=0xfffffd806818da30 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58664 263692 61224 0 2 0 syz-executor.0 *58664 121113 61224 0 7 0x4000000 syz-executor.0 1939 499557 88851 0 2 0x2 syz-executor.1 61224 50860 88851 0 3 0x82 nanoslp syz-executor.0 63931 406240 0 0 3 0x14200 bored sosplice 88851 229626 71993 0 3 0x82 thrsleep syz-fuzzer 88851 447787 71993 0 3 0x4000082 nanoslp syz-fuzzer 88851 394214 71993 0 3 0x4000082 nanoslp syz-fuzzer 88851 334176 71993 0 3 0x4000082 thrsleep syz-fuzzer 88851 459915 71993 0 3 0x4000082 thrsleep syz-fuzzer 88851 409829 71993 0 3 0x4000082 thrsleep syz-fuzzer 88851 127156 71993 0 3 0x4000082 kqread syz-fuzzer 88851 398580 71993 0 3 0x4000082 thrsleep syz-fuzzer 71993 16110 32131 0 3 0x10008a sigsusp ksh 32131 476 4946 0 3 0x9a kqread sshd 15196 293174 1 0 3 0x100083 ttyin getty 4946 368889 1 0 3 0x88 kqread sshd 81708 511537 27200 74 3 0x100092 bpf pflogd 27200 248807 1 0 3 0x80 netio pflogd 23374 105777 42127 73 3 0x100090 kqread syslogd 42127 401768 1 0 3 0x100082 netio syslogd 63104 257360 1 0 3 0x100080 kqread resolvd 17592 258351 66904 77 3 0x100092 kqread dhcpleased 43213 409204 66904 77 3 0x100092 kqread dhcpleased 66904 288213 1 0 3 0x80 kqread dhcpleased 52210 484281 0 0 3 0x14200 bored smr 37011 246169 0 0 2 0x14200 zerothread 9800 486697 0 0 3 0x14200 aiodoned aiodoned 34454 507498 0 0 3 0x14200 syncer update 31056 35224 0 0 3 0x14200 cleaner cleaner 12380 196121 0 0 3 0x14200 reaper reaper 66483 18706 0 0 3 0x14200 pgdaemon pagedaemon 60137 430670 0 0 3 0x14200 bored viomb 65010 215756 0 0 3 0x40014200 acpi0 acpi0 33631 102594 0 0 7 0x40014200 idle1 10014 452220 0 0 3 0x14200 bored softnet 62155 480517 0 0 3 0x14200 bored systqmp 38243 25116 0 0 3 0x14200 bored systq 20343 291135 0 0 3 0x40014200 bored softclock 95361 490315 0 0 3 0x40014200 idle0 1 474516 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 58664 (syz-executor.0) thread 0xffff8000212342a0 (121113) exclusive rwlock vcpu r = 0 (0xffff80002127dbb0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 vm_run+0x2e0 sys/arch/amd64/amd64/vmm.c:4262 #2 vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 #3 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #5 sys_ioctl+0x4a2 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 1939 (syz-executor.1) thread 0xffff800021235500 (499557) exclusive rrwlock inode r = 0 (0xfffffd806b15b4d8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1eb sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x145f sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x737 sys/kern/vfs_lookup.c:561 #11 namei+0x55a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068caf818) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10148 6555K 7073K 78643K 20458 0 pcb 13 22K 24K 78643K 1565 0 rtable 132 8K 10K 78643K 1562 0 ifaddr 55 14K 16K 78643K 582 0 sysctl 2 0K 0K 78643K 2 0 counters 44 34K 34K 78643K 200 0 ioctlops 0 0K 4K 78643K 2511 0 iov 0 0K 24K 78643K 605 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1344 84K 85K 78643K 3991 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 37 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1338 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 6460 0 sigio 0 0K 0K 78643K 40 0 proc 70 87K 111K 78643K 789 0 subproc 26 1K 2K 78643K 192 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1469 0 in_multi 29 1K 2K 78643K 2695 0 ether_multi 1 0K 0K 78643K 365 0 mrt 1 0K 0K 78643K 20 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 121 546K 546K 78643K 121 0 exec 0 0K 2K 78643K 1005 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 299 252K 259K 78643K 85953 0 UVM aobj 131 4K 4K 78643K 145 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1586 0 NDP 7 0K 0K 78643K 195 0 temp 88 4202K 4298K 78643K 38830 0 kqueue 12 18K 28K 78643K 177 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 120 262 0 259 3 2 1 3 0 8 0 rtentry 112 487 0 444 3 1 2 2 0 8 0 unpcb 128 3931 0 3916 36 35 1 5 0 8 0 syncache 296 32 0 32 9 9 0 1 0 8 0 tcpqe 32 680 0 680 3 3 0 1 0 8 0 tcpcb 736 5142 0 5122 86 83 3 15 0 8 0 arp 120 28 0 22 1 0 1 1 0 8 0 inpcb 304 13437 0 13424 95 88 7 16 0 8 5 rttmr 72 11 0 11 4 3 1 1 0 8 1 nd6 48 129 0 124 1 0 1 1 0 8 0 pkpcb 40 26 0 26 4 4 0 1 0 8 0 kcovpl 48 14 0 12 1 0 1 1 0 8 0 ppxss 1248 25 0 25 6 6 0 1 0 8 0 pffrag 232 73 0 73 4 4 0 1 0 482 0 pffrnode 88 73 0 73 4 4 0 1 0 8 0 pffrent 40 479 0 479 4 4 0 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 110 0 101 4 3 1 2 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 39 0 37 1 0 1 1 0 8 0 pfstkey 112 39 0 37 1 0 1 1 0 8 0 pfstate 320 39 0 37 3 2 1 3 0 8 0 pfsrctr 152 8 0 8 2 2 0 1 0 8 0 pfrule 1360 513 0 468 7 3 4 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2662 0 2465 87 74 13 81 0 8 0 art_table 32 2663 0 2465 11 9 2 11 0 8 0 art_node 16 486 0 447 1 0 1 1 0 8 0 sysvmsgpl 40 271 0 231 1 0 1 1 0 8 0 semapl 112 1336 0 1326 1 0 1 1 0 8 0 shmpl 112 142 0 14 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 9785 0 8360 90 0 90 90 0 8 0 ffsino 272 9785 0 8360 96 0 96 96 0 8 0 nchpl 144 18846 0 17254 61 1 60 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 57970 0 57970 2 1 1 1 0 8 1 percpumem 16 112 0 78 1 0 1 1 0 8 0 vcpupl 2048 109 0 0 14 0 14 14 0 8 0 vmpool 560 118 0 9 8 0 8 8 0 8 0 pfiaddrpl 120 47 0 29 1 0 1 1 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 52601 0 52601 14 13 1 8 0 8 1 plimitpl 152 745 0 736 1 0 1 1 0 8 0 sigapl 424 6675 0 6642 4 0 4 4 0 8 0 futexpl 64 54575 0 54575 2 1 1 1 0 8 1 knotepl 112 116 0 0 2 0 2 2 0 8 0 kqueuepl 216 1414 0 1406 32 31 1 5 0 8 0 pipepl 336 991 0 981 41 40 1 7 0 8 0 fdescpl 496 6659 0 6641 3 0 3 3 0 8 0 filepl 152 43926 0 43819 69 60 9 14 0 8 4 lockfpl 104 2092 0 2090 4 3 1 2 0 8 0 lockfspl 48 548 0 546 1 0 1 1 0 8 0 sessionpl 144 27 0 16 1 0 1 1 0 8 0 pgrppl 48 28 0 17 1 0 1 1 0 8 0 ucredpl 96 5859 0 5847 1 0 1 1 0 8 0 zombiepl 144 6642 0 6642 2 1 1 1 0 8 1 processpl 1064 6675 0 6642 3 0 3 3 0 8 0 procpl 672 20217 0 20176 10 5 5 6 0 8 1 srpgc 96 6 0 6 3 3 0 1 0 8 0 sosppl 168 15 0 13 5 4 1 1 0 8 0 sockpl 480 17664 0 17633 236 223 13 29 0 8 8 mcl64k 65536 26 0 0 3 0 3 3 0 8 0 mcl16k 16384 14 0 0 2 0 2 2 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 34 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 222 0 0 23 0 23 23 0 8 0 mtagpl 96 487 0 0 9 0 9 9 0 8 0 mbufpl 256 8716 0 0 536 1 535 535 0 8 0 bufpl 280 12684 0 6355 453 0 453 453 0 8 0 anonpl 24 1902976 0 1885834 184 67 117 130 0 186 10 amapchunkpl 152 208364 0 207691 50 22 28 34 0 158 0 amappl16 200 16374 0 15829 79 49 30 42 0 8 0 amappl15 192 1795 0 1789 1 0 1 1 0 8 0 amappl14 184 15 0 14 4 3 1 1 0 8 0 amappl13 176 86 0 85 1 0 1 1 0 8 0 amappl12 168 3015 0 3010 1 0 1 1 0 8 0 amappl11 160 77 0 60 1 0 1 1 0 8 0 amappl10 152 25 0 20 1 0 1 1 0 8 0 amappl9 144 1178 0 1173 1 0 1 1 0 8 0 amappl8 136 1304 0 1240 3 0 3 3 0 8 0 amappl7 128 784 0 776 1 0 1 1 0 8 0 amappl6 120 1012 0 1001 1 0 1 1 0 8 0 amappl5 112 5758 0 5738 1 0 1 1 0 8 0 amappl4 104 848 0 820 1 0 1 1 0 8 0 amappl3 96 3955 0 3936 1 0 1 1 0 8 0 amappl2 88 8081 0 8030 5 3 2 3 0 8 0 amappl1 80 116862 0 116423 15 5 10 13 0 8 0 amappl 88 85382 0 85185 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 64 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 6777 0 6650 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6777 0 6650 1 0 1 1 0 8 0 vmmpekpl 168 48186 0 48153 2 0 2 2 0 8 0 vmmpepl 168 612698 0 610567 288 177 111 123 0 357 13 vmsppl 368 6776 0 6650 12 0 12 12 0 8 0 rwobjpl 56 148646 0 147285 36 15 21 23 0 8 0 pdppl 4096 13562 0 13409 184 28 156 157 0 8 3 pvpl 32 3132649 0 3112090 291 98 193 206 0 265 22 pmappl 224 6776 0 6650 8 0 8 8 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 1196 0 232 29 1 28 28 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace done_flush() at done_flush+0x38 vm_run(ffff8000244ddad0) at vm_run+0x304 sys/arch/amd64/amd64/vmm.c:4295 vmmioctl(a00,c0205602,ffff8000244ddad0,1,ffff8000212342a0) at vmmioctl+0x8f sys/arch/amd64/amd64/vmm.c:492 VOP_IOCTL(fffffd806e07c2f0,c0205602,ffff8000244ddad0,1,fffffd807f7d7600,ffff8000212342a0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80682183a8,c0205602,ffff8000244ddad0,ffff8000212342a0) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000212342a0,ffff8000244ddbe8,ffff8000244ddc40) at sys_ioctl+0x4a2 syscall(ffff8000244ddcb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000244ddcb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeae213f1900, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5