kernel: double fault trap, code=0 Stopped at restore_saved+0x32: xorq 0x30(%rsp),%r11 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 0xffff8000ffffea20 rsi 0xffff8000ffff16f0 rbp 0 rbx 0 rdx 0 rcx 0 rax 0x7 r8 0 r9 0 r10 0x66a6262d85207ee7 r11 0xc33b92a5d46963ea r12 0xffff8000ffff16f0 r13 0xffff80003720b000 r14 0 r15 0xffff8000ffffea20 rip 0xffffffff812bc1dc restore_saved+0x32 cs 0x8 rflags 0x10046 __ALIGN_SIZE+0xf046 rsp 0 ss 0x10 restore_saved+0x32: xorq 0x30(%rsp),%r11 ddb{0}> show proc PROC (syz-executor) tid=205739 pid=31022 tcnt=3 stat=onproc flags process=8000000 proc=480 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff0538,0xffff80002a03e538 process=0xffff800029fea8d0 user=0xffff80003720b000, vmspace=0xfffffd806c6ac388 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59154 101832 6188 0 2 0x8000000 syz-executor 53771 302661 59682 0 2 0x8000000 syz-executor 53771 162240 59682 0 3 0xc000080 fsleep syz-executor 98232 275082 90737 0 7 0x8000000 syz-executor 98232 55402 90737 0 3 0xc000000 biowait syz-executor 65155 455468 2954 0 2 0x8000000 syz-executor 65155 80685 2954 0 2 0xc000000 syz-executor 12574 192224 26036 0 2 0x8000000 syz-executor 12574 382768 26036 0 3 0xc000080 fsleep syz-executor *31022 205739 58794 0 7 0x8000480 syz-executor 31022 341118 58794 0 3 0xc000080 kqread syz-executor 31022 500755 58794 0 3 0xc000080 fsleep syz-executor 97072 278542 71984 0 3 0x8000080 nanoslp syz-executor 97072 7815 71984 0 3 0xc000080 rest syz-executor 97072 251745 71984 0 3 0xc000080 fsleep syz-executor 60007 449918 98924 0 2 0x8000480 syz-executor 60007 359697 98924 0 3 0xc000080 piperd syz-executor 60007 370457 98924 0 3 0xc000080 fsleep syz-executor 90737 51551 96408 0 2 0x8000482 syz-executor 98924 503155 96408 0 3 0x8000082 nanoslp syz-executor 26036 358797 96408 0 2 0x8000482 syz-executor 6188 74662 96408 0 2 0x8000002 syz-executor 58794 106498 96408 0 3 0x8000082 nanoslp syz-executor 59682 461043 96408 0 3 0x8000082 nanoslp syz-executor 71984 133675 96408 0 3 0x8000082 nanoslp syz-executor 2954 80040 96408 0 3 0x8000082 nanoslp syz-executor 89717 406015 1 0 3 0x18100083 ttyin getty 69452 484507 0 0 3 0x14200 bored sosplice 96408 377537 79976 0 3 0x8000082 kqread syz-executor 79976 253335 86882 0 3 0x810008a sigsusp ksh 86882 214464 48544 0 3 0x18000098 kqread sshd-session 48544 411444 38585 0 3 0x18000092 kqread sshd-session 38585 202402 1 0 3 0x18000088 kqread sshd 11318 140014 77186 74 3 0x19100092 bpf pflogd 77186 132659 1 0 3 0x18000080 sbwait pflogd 27080 352592 60727 73 3 0x19100010 biowait syslogd 60727 470377 1 0 3 0x18100082 sbwait syslogd 6016 117324 1 0 3 0x18100080 kqread resolvd 45439 287641 62328 77 3 0x18100092 kqread dhcpleased 35202 324702 62328 77 3 0x18100092 kqread dhcpleased 62328 3014 1 0 3 0x18000080 kqread dhcpleased 6842 57332 0 0 3 0x14200 bored smr 37715 230352 0 0 2 0x14200 zerothread 6937 414073 0 0 3 0x14200 aiodoned aiodoned 85482 432119 0 0 3 0x14200 syncer update 32891 96389 0 0 3 0x14200 cleaner cleaner 77800 430624 0 0 3 0x14200 reaper reaper 32680 188217 0 0 3 0x14200 pgdaemon pagedaemon 24770 144450 0 0 3 0x14200 bored viomb 83989 434858 0 0 3 0x40014200 acpi0 acpi0 8483 512698 0 0 3 0x40014200 idle1 28181 518320 0 0 3 0x14200 bored softnet3 72102 85645 0 0 3 0x14200 bored softnet2 43914 306778 0 0 3 0x14200 bored softnet1 34748 310341 0 0 3 0x14200 bored softnet0 47520 180514 0 0 3 0x14200 bored systqmp 34916 182666 0 0 3 0x14200 bored systq 63890 222048 0 0 3 0x14200 tmoslp softclockmp 14289 171707 0 0 3 0x40014200 tmoslp softclock 61305 239815 0 0 3 0x40014200 idle0 1 136459 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff835eadd0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 sleep_finish+0x1a9 sys/kern/kern_synch.c:400 #4 msleep+0x13b sys/kern/kern_synch.c:249 #5 softclock_thread_mp+0xaf sys/kern/kern_timeout.c:831 #6 proc_trampoline+0x10 Process 98232 (syz-executor) thread 0xffff8000ffff1978 (55402) exclusive rrwlock inode r = 0 (0xfffffd8069fb6a30) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_pwrite+0xae sys/kern/vfs_syscalls.c:3354 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 27080 (syslogd) thread 0xffff8000ffffd6d8 (352592) exclusive rrwlock inode r = 0 (0xfffffd806e4924e0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 10260K 10806K 166960K 14777 0 pcb 17 16K 19K 166960K 438 0 rtable 224 17K 17K 166960K 3869 0 pf 48 20K 24K 166960K 425 0 ifaddr 45 9K 9K 166960K 532 0 ifgroup 67 2K 3K 166960K 579 0 sysctl 4 1K 1K 166960K 4 0 counters 70 37K 37K 166960K 342 0 ioctlops 0 0K 4K 166960K 1983 0 iov 1 8K 28K 166960K 185 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1565 98K 99K 166960K 5088 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 39 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 177 0 dirhash 18 3K 3K 166960K 39 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 89K 166960K 3178 0 sigio 0 0K 0K 166960K 97 0 proc 70 91K 140K 166960K 3793 0 subproc 104 6K 8K 166960K 1580 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 269 0 in_multi 102 7K 7K 166960K 1365 0 ether_multi 2 0K 0K 166960K 17 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 2194 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 77K 99K 166960K 24929 0 UVM aobj 26 5K 5K 166960K 27 0 pinsyscall 43 86K 102K 166960K 7145 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 92 0 NDP 19 0K 2K 166960K 390 0 temp 76 6820K 6956K 166960K 69137 0 kqueue 16 26K 30K 166960K 284 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 399 0 396 2 1 1 2 0 8 0 rtentry 112 1368 0 1274 5 2 3 4 0 8 0 unpcb 144 1950 0 1928 21 20 1 9 0 8 0 syncache 336 6 0 6 4 4 0 1 0 8 0 tcpqe 32 1 17 1 1 1 0 1 0 8 0 tcpcb 808 875 0 869 35 31 4 10 0 8 3 arp 120 245 0 229 1 0 1 1 0 8 0 inpcb 336 3521 0 3509 50 46 4 15 0 8 2 nd6 136 370 0 345 2 1 1 2 0 8 0 pkpcb 40 13 0 13 6 5 1 1 0 8 1 kcovpl 48 119 0 111 1 0 1 1 0 8 0 ppxss 1168 19 0 19 6 6 0 1 0 8 0 pfstscr 40 7 0 7 5 5 0 1 0 8 0 pffrag 232 14 0 10 1 0 1 1 0 482 0 pffrnode 88 14 0 10 1 0 1 1 0 8 0 pffrent 40 64 0 60 1 0 1 1 0 8 0 pfosfp 40 1433 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1433 0 714 21 0 21 21 0 8 0 pfrktable 1344 21 0 17 2 1 1 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 8 0 2 2 1 1 1 0 8 0 pfqueue 264 3 0 2 2 1 1 1 0 8 0 pfstitem 24 237 0 192 1 0 1 1 0 8 0 pfstkey 128 256 0 207 2 0 2 2 0 8 0 pfstate 376 243 0 199 7 1 6 6 0 8 0 pfrule 1344 79 0 37 5 1 4 4 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 5467 0 5031 39 11 28 29 0 8 0 art_table 32 5469 0 5032 4 0 4 4 0 8 0 art_node 16 1363 0 1279 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 10 2 1 1 1 0 8 0 semapl 112 175 0 165 1 0 1 1 0 8 0 shmpl 112 24 0 1 1 0 1 1 0 8 0 dirhash 1024 35 0 14 3 0 3 3 0 8 0 dino2pl 256 4875 0 3149 109 0 109 109 0 8 0 ffsino 272 4875 0 3149 116 0 116 116 0 8 0 nchpl 144 7330 0 6626 67 39 28 67 0 8 0 uvmvnodes 80 7864 0 0 161 0 161 161 0 8 0 vnodes 216 7864 0 0 437 0 437 437 0 8 0 namei 1024 39658 0 39658 9 8 1 2 0 8 1 percpumem 16 185 0 136 1 0 1 1 0 8 0 vcpupl 3904 6 0 1 1 0 1 1 0 8 0 vmpool 696 11 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 6 0 4 1 0 1 1 0 8 0 kstatmem 264 302 0 272 3 0 3 3 0 8 0 scsiplug 72 8 0 8 5 5 0 1 0 8 0 scxspl 216 71676 0 71674 18 17 1 8 1 8 0 plimitpl 152 932 0 915 1 0 1 1 0 8 0 sigapl 424 3281 0 3230 10 3 7 9 0 8 0 futexpl 64 28714 0 28709 8 7 1 1 0 8 0 knotepl 120 720 0 0 17 0 17 17 0 8 0 kqueuepl 216 934 0 922 20 15 5 5 0 8 4 pipepl 320 718 0 690 6 3 3 5 0 8 0 fdescpl 496 3239 0 3207 11 6 5 5 0 8 0 filepl 152 22818 0 22559 56 42 14 21 0 8 3 lockfpl 104 883 0 880 4 3 1 2 0 8 0 lockfspl 48 351 0 348 1 0 1 1 0 8 0 sessionpl 144 136 0 127 1 0 1 1 0 8 0 pgrppl 48 351 0 334 1 0 1 1 0 8 0 ucredpl 104 3447 0 3432 1 0 1 1 0 8 0 zombiepl 144 3230 0 3230 1 0 1 1 0 8 1 processpl 1160 3281 0 3230 7 3 4 6 0 8 0 procpl 648 5790 0 5729 10 4 6 8 0 8 0 srpgc 96 10 0 10 4 4 0 1 0 8 0 sosppl 168 6 0 6 5 4 1 1 0 8 1 sockpl 664 5904 0 5867 74 68 6 21 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 34 0 0 5 3 2 5 0 8 0 mcl2k 2048 260 0 0 31 0 31 31 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 665 0 0 32 0 32 32 0 8 0 bufpl 280 12859 0 4411 604 0 604 604 0 8 0 anonpl 24 475240 0 470918 153 90 63 85 0 185 26 amapchunkpl 152 79143 0 78579 79 48 31 45 0 158 6 amappl16 200 7988 0 7963 58 54 4 27 0 8 2 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 349 0 337 1 0 1 1 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 5656 0 5625 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 140 0 140 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 332 0 319 1 0 1 1 0 8 0 amappl6 120 1279 0 1277 1 0 1 1 0 8 0 amappl5 112 589 0 577 1 0 1 1 0 8 0 amappl4 104 649 0 629 1 0 1 1 0 8 0 amappl3 96 15032 0 14912 5 1 4 4 0 8 0 amappl2 88 2186 0 2122 2 0 2 2 0 8 0 amappl1 80 23701 0 23112 20 7 13 14 0 8 0 amappl 88 23618 0 23435 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 26 0 1 1 0 1 1 0 8 0 uaddrrnd 24 3250 0 3213 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3250 0 3213 1 0 1 1 0 8 0 vmmpekpl 168 28598 0 28539 4 0 4 4 0 8 0 vmmpepl 168 204018 0 202080 139 44 95 108 0 357 10 vmsppl 440 3249 0 3213 7 2 5 5 0 8 0 rwobjpl 56 65168 0 56318 128 2 126 126 0 8 1 pdppl 4096 6507 0 6431 263 182 81 83 0 8 5 pvpl 32 45805 0 0 369 0 369 369 0 265 0 pmappl 248 3249 0 3213 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 711 0 294 13 0 13 13 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(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 mtx_enter(ffffffff835eadc0) at mtx_enter+0xa7 sys/kern/kern_lock.c:250 schedclock(ffff8000ffff11e0) at schedclock+0xac sys/kern/sched_bsd.c:555 statclock(ffff800029b7cdc0,ffff800037216960,0) at statclock+0x2c6 clockintr_dispatch(ffff800037216960) at clockintr_dispatch+0x3a3 lapic_clockintr(0,0) at lapic_clockintr+0x51 sys/arch/amd64/amd64/lapic.c:482 Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a end of kernel end trace frame: 0x7d42bab7f690, count: -9