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 0xffffffff832c9000 end+0x2c9000 rsi 0xffff80002a22c7f0 rbp 0 rbx 0 rdx 0 rcx 0xfffffd806c26b6d8 rax 0x1b r8 0xffffffffffffffff r9 0 r10 0xda65b32cb3e3d4da r11 0x78370ad6c9a4765a r12 0xffff80002a22c7f0 r13 0xffff800035949000 r14 0 r15 0xffff80002a204cf0 rip 0xffffffff821191dc 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.2) tid=269401 pid=27331 tcnt=1 stat=onproc flags process=8000002 proc=480 runpri=32, usrpri=76, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000ffffc010,0xffff80002a204f90 process=0xffff800037436c88 user=0xffff800035949000, vmspace=0xfffffd806ef3b1c0 estcpu=36, cpticks=15, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58225 457727 27331 0 2 0x8000000 syz-executor.2 58225 123099 27331 0 2 0xc000000 syz-executor.2 2248 5714 27405 0 2 0x8000000 syz-executor.6 2248 162117 27405 0 2 0xc000000 syz-executor.6 20088 304456 13282 0 3 0x8000080 nanoslp syz-executor.4 20088 442629 13282 0 3 0xc000080 netcon syz-executor.4 20088 374242 13282 0 3 0xc000080 fsleep syz-executor.4 18697 251061 17426 0 3 0x8000080 nanoslp syz-executor.7 18697 178403 17426 0 3 0xc000000 smrbar syz-executor.7 20937 263458 76499 0 7 0x8000000 syz-executor.5 20937 182401 76499 0 3 0xc000000 biowait syz-executor.5 82402 327116 60904 0 2 0x8000000 syz-executor.3 82402 180398 60904 0 3 0xc000080 fsleep syz-executor.3 20834 194530 49728 0 2 0x8000000 syz-executor.0 20834 422412 49728 0 3 0xc000080 fsleep syz-executor.0 29630 52231 4712 0 2 0x8000000 syz-executor.1 29630 371621 4712 0 3 0xc000080 lockf syz-executor.1 29630 72855 4712 0 3 0xc000080 fsleep syz-executor.1 29630 512976 4712 0 3 0xc000080 fsleep syz-executor.1 *27331 269401 17202 0 7 0x8000482 syz-executor.2 49728 54137 17202 0 3 0x8000082 nanoslp syz-executor.0 17426 445410 17202 0 3 0x8000082 nanoslp syz-executor.7 14014 85743 0 0 3 0x14280 nfsidl nfsio 56614 367554 0 0 3 0x14280 nfsidl nfsio 76398 329161 0 0 3 0x14280 nfsidl nfsio 76213 64917 0 0 3 0x14280 nfsidl nfsio 77239 299819 0 0 3 0x14280 nfsidl nfsio 72849 457772 0 0 3 0x14280 nfsidl nfsio 26684 27339 0 0 3 0x14280 nfsidl nfsio 94509 310502 0 0 3 0x14280 nfsidl nfsio 17465 272248 0 0 3 0x14280 nfsidl nfsio 26250 377198 0 0 3 0x14280 nfsidl nfsio 97808 110553 0 0 3 0x14280 nfsidl nfsio 5841 163353 0 0 3 0x14280 nfsidl nfsio 21813 175170 0 0 3 0x14280 nfsidl nfsio 98481 440562 0 0 3 0x14280 nfsidl nfsio 99508 169696 0 0 3 0x14280 nfsidl nfsio 613 244524 0 0 3 0x14280 nfsidl nfsio 48586 178207 0 0 3 0x14280 nfsidl nfsio 17998 336079 0 0 3 0x14280 nfsidl nfsio 96293 31123 0 0 3 0x14280 nfsidl nfsio 82870 422440 0 0 3 0x14280 nfsidl nfsio 13282 470300 17202 0 3 0x8000082 nanoslp syz-executor.4 46434 413645 0 0 3 0x14200 bored sosplice 7655 406168 95115 0 3 0x18100082 netio ndp 95115 311925 1 0 3 0x810008a sigsusp sh 27405 213807 17202 0 3 0x8000082 nanoslp syz-executor.6 4712 52769 17202 0 3 0x8000082 nanoslp syz-executor.1 76499 284877 17202 0 3 0x8000082 nanoslp syz-executor.5 60904 211886 17202 0 3 0x8000082 nanoslp syz-executor.3 17202 334484 26277 0 3 0x1a000082 thrsleep syz-fuzzer 17202 13747 26277 0 3 0x1e000082 nanoslp syz-fuzzer 17202 261955 26277 0 3 0x1e000082 wait syz-fuzzer 17202 375292 26277 0 3 0x1e000082 wait syz-fuzzer 17202 78384 26277 0 3 0x1e000082 thrsleep syz-fuzzer 17202 272622 26277 0 3 0x1e000082 thrsleep syz-fuzzer 17202 353867 26277 0 3 0x1e000082 wait syz-fuzzer 17202 321274 26277 0 3 0x1e000082 wait syz-fuzzer 17202 343638 26277 0 3 0x1e000082 wait syz-fuzzer 17202 140621 26277 0 3 0x1e000082 thrsleep syz-fuzzer 17202 213446 26277 0 3 0x1e000082 thrsleep syz-fuzzer 17202 366559 26277 0 3 0x1e000082 kqread syz-fuzzer 17202 522855 26277 0 3 0x1e000082 wait syz-fuzzer 17202 173875 26277 0 3 0x1e000082 wait syz-fuzzer 17202 392049 26277 0 3 0x1e000082 wait syz-fuzzer 26277 504631 93454 0 3 0x810008a sigsusp ksh 93454 7732 95365 0 3 0x1800009a kqread sshd 43794 187576 1 0 3 0x18100083 ttyin getty 95365 351787 1 0 3 0x18000088 kqread sshd 46542 117808 51214 73 3 0x19100010 biowait syslogd 51214 138643 1 0 3 0x18100082 sbwait syslogd 13898 335221 1 0 3 0x18100080 kqread resolvd 31812 383435 0 0 3 0x14200 bored smr 76713 297225 0 0 2 0x14200 zerothread 17778 322692 0 0 3 0x14200 aiodoned aiodoned 5298 310308 0 0 3 0x14200 syncer update 46858 204079 0 0 3 0x14200 cleaner cleaner 37015 399122 0 0 3 0x14200 reaper reaper 76641 234117 0 0 3 0x14200 pgdaemon pagedaemon 29952 340557 0 0 3 0x14200 bored viomb 8034 513362 0 0 3 0x40014200 acpi0 acpi0 91940 515072 0 0 3 0x40014200 idle1 63545 41906 0 0 3 0x14200 bored softnet3 65689 178853 0 0 3 0x14200 bored softnet2 95177 467838 0 0 3 0x14200 bored softnet1 18512 210302 0 0 3 0x14200 bored softnet0 22112 194467 0 0 3 0x14200 bored systqmp 66551 381710 0 0 3 0x14200 bored systq 13817 144976 0 0 3 0x14200 tmoslp softclockmp 60487 372587 0 0 3 0x40014200 tmoslp softclock 49018 281384 0 0 3 0x40014200 idle0 1 345801 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82e13b48) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 sleep_finish+0x145 sys/kern/kern_synch.c:401 #2 sys_nanosleep+0x1f8 sys/kern/kern_time.c:297 #3 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #3 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 18697 (syz-executor.7) thread 0xffff80002a22a808 (178403) Process 20937 (syz-executor.5) thread 0xffff80002a22b4d8 (182401) Process 46542 (syslogd) thread 0xffff8000ffffdc40 (117808) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 6497K 6548K 166960K 11648 0 pcb 19 13K 13K 166960K 145 0 rtable 201 6K 7K 166960K 556 0 pf 30 9K 10K 166960K 97 0 ifaddr 41 15K 16K 166960K 90 0 ifgroup 59 2K 2K 166960K 135 0 sysctl 4 1K 1K 166960K 4 0 counters 64 36K 36K 166960K 120 0 ioctlops 0 0K 4K 166960K 1540 0 iov 0 0K 20K 166960K 33 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1391 87K 88K 166960K 1849 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 97 0 dirhash 12 2K 3K 166960K 48 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 20 73K 85K 166960K 1009 0 sigio 1 0K 0K 166960K 15 0 proc 52 54K 103K 166960K 641 0 subproc 117 7K 8K 166960K 156 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 110 0 in_multi 87 6K 7K 166960K 163 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 538 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 273 91K 111K 166960K 11401 0 UVM aobj 118 3K 3K 166960K 120 0 pinsyscall 35 70K 100K 166960K 2247 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 70 0 NDP 11 0K 2K 166960K 63 0 temp 74 6819K 6885K 166960K 21210 0 kqueue 8 14K 24K 166960K 147 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 120 126 0 124 1 0 1 1 0 8 0 rtentry 112 178 0 86 4 0 4 4 0 8 0 unpcb 144 1126 0 1118 12 11 1 8 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 43 0 43 1 1 0 1 0 8 0 tcpcb 808 478 0 471 15 13 2 11 0 8 0 arp 120 33 0 14 1 0 1 1 0 8 0 inpcb 384 1261 0 1248 24 19 5 11 0 8 2 nd6 136 42 0 20 2 0 2 2 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 12 0 3 1 0 1 1 0 8 0 ppxss 1168 19 0 19 2 2 0 1 0 8 0 pffrag 232 3 0 2 1 0 1 1 0 482 0 pffrnode 88 3 0 2 1 0 1 1 0 8 0 pffrent 40 6 0 5 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 77 0 43 1 0 1 1 0 8 0 pfstkey 128 77 0 43 2 0 2 2 0 8 0 pfstate 376 77 0 43 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 659 0 282 29 3 26 29 0 8 0 art_table 32 660 0 282 4 0 4 4 0 8 0 art_node 16 173 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 10 1 0 1 1 0 8 0 semapl 112 95 0 85 1 0 1 1 0 8 0 shmpl 112 117 0 2 4 0 4 4 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 3221 0 1702 96 0 96 96 0 8 0 ffsino 272 3221 0 1702 102 0 102 102 0 8 0 nchpl 144 4752 0 3009 67 0 67 67 0 8 0 uvmvnodes 80 3477 0 0 71 0 71 71 0 8 0 vnodes 216 3477 0 0 194 0 194 194 0 8 0 namei 1024 17154 0 17153 4 3 1 3 0 8 0 percpumem 16 74 0 28 1 0 1 1 0 8 0 vcpupl 3904 3 0 1 1 0 1 1 0 8 0 vmpool 696 7 0 5 2 1 1 1 0 8 0 kstatmem 264 78 0 56 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 24651 0 24649 13 9 4 8 1 8 3 plimitpl 152 231 0 214 1 0 1 1 0 8 0 sigapl 424 1324 0 1257 8 0 8 8 0 8 0 futexpl 64 15339 0 15334 2 1 1 1 0 8 0 knotepl 120 545 0 0 16 0 16 16 0 8 0 kqueuepl 216 432 0 425 9 7 2 5 0 8 1 pipepl 320 321 0 290 9 5 4 9 0 8 0 fdescpl 496 1285 0 1257 6 1 5 5 0 8 0 filepl 152 9297 0 9034 27 15 12 18 0 8 0 lockfpl 104 321 0 318 1 0 1 1 0 8 0 lockfspl 48 139 0 137 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 49 0 33 1 0 1 1 0 8 0 ucredpl 104 1421 0 1413 1 0 1 1 0 8 0 zombiepl 144 1257 0 1257 1 0 1 1 0 8 1 processpl 1136 1324 0 1257 6 0 6 6 0 8 0 procpl 656 2573 0 2481 12 3 9 9 0 8 0 srpgc 96 9 0 9 2 2 0 1 0 8 0 sosppl 168 45 0 44 5 4 1 1 0 8 0 sockpl 664 2522 0 2501 35 30 5 19 0 8 2 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 329 0 0 42 0 42 42 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 482 0 0 26 0 26 26 0 8 0 bufpl 280 7475 0 1220 447 0 447 447 0 8 0 anonpl 24 264863 0 259012 84 19 65 66 0 186 6 amapchunkpl 152 37222 0 36512 58 21 37 40 0 158 8 amappl16 200 5954 0 5813 26 13 13 22 0 8 0 amappl15 192 34 0 32 1 0 1 1 0 8 0 amappl14 184 209 0 198 2 1 1 2 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 1995 0 1963 2 0 2 2 0 8 0 amappl11 160 44 0 40 1 0 1 1 0 8 0 amappl10 152 61 0 53 1 0 1 1 0 8 0 amappl9 144 191 0 191 2 2 0 1 0 8 0 amappl8 136 130 0 97 2 0 2 2 0 8 0 amappl7 128 56 0 43 1 0 1 1 0 8 0 amappl6 120 377 0 364 2 1 1 2 0 8 0 amappl5 112 181 0 172 1 0 1 1 0 8 0 amappl4 104 578 0 545 2 0 2 2 0 8 0 amappl3 96 7677 0 7584 4 1 3 3 0 8 0 amappl2 88 1692 0 1633 4 2 2 4 0 8 0 amappl1 80 12464 0 12030 22 10 12 22 0 8 0 amappl 88 10773 0 10572 6 0 6 6 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 72 119 0 2 3 0 3 3 0 8 0 uaddrrnd 24 1292 0 1262 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1292 0 1262 1 0 1 1 0 8 0 vmmpekpl 168 14027 0 13962 4 0 4 4 0 8 0 vmmpepl 168 97464 0 95649 128 42 86 115 0 357 0 vmsppl 440 1291 0 1262 4 0 4 4 0 8 0 rwobjpl 56 32887 0 28283 67 2 65 65 0 8 0 pdppl 4096 2591 0 2526 139 74 65 75 0 8 0 pvpl 32 49316 0 0 398 0 398 398 0 265 0 pmappl 248 1291 0 1262 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 466 0 98 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+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 end of kernel end trace frame: 0x7859d1415bf0, count: -3