kernel: double fault trap, code=0 Stopped at Xsyscall_trampback: repe nop ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace ffffffff8284428e(c23ab2522c7e4d6c,0,5973b2e5000,7e7c065de6c0,5951e885d75,b878d5e638bd00cf) at Xsyscall_trampback 5951e885513(3f9a707431e99de0,5951e8c5080,32,5951e8c50a0,5951e8c50a8,46ad2) at 0x5951e885513 5951e86f5db(c282fd51f74cae7f,bb8,12,4289,46a96,0) at 0x5951e86f5db 5951e86e615(7e7c065de860,7e7c065ded78,c,3,7e7c065dee80,eaa8e7ef) at 0x5951e86e615 5951e86c8b9(5951e86c8b9,7e7c065de850,7e7c065de860,7e7c065ded78,c,3) at 0x5951e86c8b9 5951e86c283(1c508f16acc25d50,2,7e7c065ded78,5951e86b5a0,7e7c065ded90,5951e8c17c0) at 0x5951e86c283 5951e86b992(0,0,0,7e7c065ded70,0,5951e8d50e8) at 0x5951e86b992 end trace frame: 0x0, count: -7 ddb> show registers rdi 0x59784fbb4a0 rsi 0x82 rbp 0x7e7c065de5d0 rbx 0x59784fbb4a0 rdx 0x1 rcx 0x5951e885f5b rax 0x6af98002 r8 0 r9 0x5951e8c3dd0 r10 0 r11 0x286 r12 0x5951e8c3dd0 r13 0x59784fb39e0 r14 0 r15 0x59784fbb4a0 rip 0xffffffff8284428e Xsyscall_trampback cs 0x8 rflags 0x10086 __ALIGN_SIZE+0xf086 rsp 0x7e7c065de5a0 ss 0x10 Xsyscall_trampback: repe nop ddb> show proc PROC (syz-executor.6) tid=54026 pid=36405 tcnt=2 stat=onproc flags process=0 proc=0 runpri=84, usrpri=84, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a67a550,0xffff80002a666ac8 process=0xffff8000ffff4ca0 user=0xffff800030e66000, vmspace=0xfffffd80698a6590 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 19399 61041 97677 0 2 0x2 ifconfig *36405 54026 78004 0 7 0 syz-executor.6 36405 400429 78004 0 3 0x4000080 fsleep syz-executor.6 44472 279821 56757 0 2 0 syz-executor.1 44472 108839 56757 0 3 0x4000080 fsleep syz-executor.1 97677 337898 98970 0 3 0x10008a sigsusp sh 54192 38593 99029 0 2 0 syz-executor.3 54192 249348 99029 0 3 0x4000080 fsleep syz-executor.3 98970 70069 77819 0 3 0x82 wait syz-executor.5 30875 348296 82160 0 2 0 syz-executor.7 30875 258585 82160 0 3 0x4000080 fsleep syz-executor.7 30875 465808 82160 0 3 0x4000080 netio syz-executor.7 78927 89301 94439 0 2 0 syz-executor.0 78927 158359 94439 0 3 0x4000080 fsleep syz-executor.0 63001 409654 13710 0 3 0x80 nanoslp syz-executor.2 63001 275388 13710 0 3 0x4000080 netio syz-executor.2 63001 55777 13710 0 3 0x4000080 netio syz-executor.2 78004 397791 77819 0 3 0x82 nanoslp syz-executor.6 56757 56879 77819 0 3 0x82 nanoslp syz-executor.1 82160 421491 77819 0 3 0x82 nanoslp syz-executor.7 81803 91289 0 0 3 0x14280 nfsidl nfsio 15009 67199 0 0 3 0x14280 nfsidl nfsio 45791 260300 0 0 3 0x14280 nfsidl nfsio 6999 439199 0 0 3 0x14280 nfsidl nfsio 75 89572 0 0 3 0x14280 nfsidl nfsio 97642 206319 0 0 3 0x14280 nfsidl nfsio 57476 360968 0 0 3 0x14280 nfsidl nfsio 37129 55360 0 0 3 0x14280 nfsidl nfsio 60763 343538 0 0 3 0x14280 nfsidl nfsio 22218 152576 0 0 3 0x14280 nfsidl nfsio 47661 28553 0 0 3 0x14280 nfsidl nfsio 655 169724 0 0 3 0x14280 nfsidl nfsio 53693 443613 0 0 3 0x14280 nfsidl nfsio 23718 406217 0 0 3 0x14280 nfsidl nfsio 80860 384083 0 0 3 0x14280 nfsidl nfsio 12146 172384 0 0 3 0x14280 nfsidl nfsio 35477 151462 0 0 3 0x14280 nfsidl nfsio 32046 254303 0 0 3 0x14280 nfsidl nfsio 63281 130678 0 0 3 0x14280 nfsidl nfsio 22317 370241 0 0 3 0x14280 nfsidl nfsio 89391 188734 77819 0 3 0x82 nanoslp syz-executor.4 93395 335731 0 0 3 0x14200 acct acct 13710 471141 77819 0 3 0x82 nanoslp syz-executor.2 99029 520172 77819 0 3 0x82 nanoslp syz-executor.3 64547 185128 0 0 3 0x14200 bored sosplice 94439 145066 77819 0 3 0x82 nanoslp syz-executor.0 77819 187000 59283 0 3 0x2000082 thrsleep syz-fuzzer 77819 402000 59283 0 2 0x6000002 syz-fuzzer 77819 105164 59283 0 3 0x6000082 kqread syz-fuzzer 77819 122863 59283 0 3 0x6000082 thrsleep syz-fuzzer 77819 74471 59283 0 3 0x6000082 thrsleep syz-fuzzer 77819 313478 59283 0 3 0x6000082 wait syz-fuzzer 77819 433178 59283 0 3 0x6000082 wait syz-fuzzer 77819 319595 59283 0 3 0x6000082 wait syz-fuzzer 77819 320117 59283 0 3 0x6000082 wait syz-fuzzer 77819 96422 59283 0 3 0x6000082 thrsleep syz-fuzzer 77819 489486 59283 0 3 0x6000082 wait syz-fuzzer 77819 328373 59283 0 3 0x6000082 wait syz-fuzzer 77819 112056 59283 0 3 0x6000082 wait syz-fuzzer 77819 133730 59283 0 3 0x6000082 wait syz-fuzzer 59283 297176 91478 0 3 0x10008a sigsusp ksh 91478 435866 70869 0 3 0x9a kqread sshd 4996 248766 1 0 3 0x100083 ttyin getty 70869 338065 1 0 3 0x88 kqread sshd 44536 232171 46662 73 3 0x1100090 kqread syslogd 46662 445855 1 0 3 0x100082 netio syslogd 83592 521462 1 0 3 0x100080 kqread resolvd 20198 278982 41157 77 3 0x100092 kqread dhcpleased 96246 326922 41157 77 3 0x100092 kqread dhcpleased 41157 184544 1 0 3 0x80 kqread dhcpleased 58612 66600 0 0 3 0x14200 bored smr 78535 439544 0 0 2 0x14200 zerothread 39565 159568 0 0 3 0x14200 aiodoned aiodoned 47603 288171 0 0 3 0x14200 syncer update 14127 428230 0 0 3 0x14200 cleaner cleaner 16833 312843 0 0 3 0x14200 reaper reaper 121 103468 0 0 3 0x14200 pgdaemon pagedaemon 93717 336260 0 0 3 0x14200 bored viomb 18771 99274 0 0 3 0x40014200 acpi0 acpi0 10463 135846 0 0 3 0x14200 bored softnet3 63 249935 0 0 3 0x14200 bored softnet2 31217 149004 0 0 3 0x14200 bored softnet1 52965 428929 0 0 3 0x14200 bored softnet0 78120 282017 0 0 3 0x14200 bored systqmp 81240 435695 0 0 3 0x14200 bored systq 31973 395717 0 0 3 0x40014200 tmoslp softclock 13722 255490 0 0 3 0x40014200 idle0 1 311750 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6408K 6938K 166960K 20666 0 pcb 16 16K 18K 166960K 296 0 rtable 181 5K 7K 166960K 994 0 pf 23 8K 9K 166960K 112 0 ifaddr 33 10K 12K 166960K 118 0 ifgroup 38 1K 2K 166960K 189 0 sysctl 2 0K 0K 166960K 2 0 counters 27 17K 17K 166960K 67 0 ioctlops 0 0K 2K 166960K 271 0 iov 1 2K 16K 166960K 492 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1372 86K 86K 166960K 3417 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 49 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 155 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 69K 166960K 3629 0 sigio 0 0K 0K 166960K 132 0 proc 65 67K 83K 166960K 847 0 subproc 104 6K 6K 166960K 221 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 82 0 in_multi 66 4K 7K 166960K 237 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 1336 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 388 209K 209K 166960K 35090 0 UVM aobj 131 4K 4K 166960K 140 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 77 0 NDP 8 0K 2K 166960K 83 0 temp 74 6764K 6844K 166960K 46139 0 kqueue 12 18K 24K 166960K 258 0 SYN cache 2 192K 200K 166960K 4 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 238 0 235 4 1 3 3 0 8 2 rtentry 112 300 0 218 4 0 4 4 0 8 0 unpcb 144 2302 0 2287 13 4 9 10 0 8 8 syncache 336 31 0 31 2 1 1 1 0 8 1 tcpqe 32 174 0 174 2 1 1 1 0 8 1 tcpcb 808 1261 0 1250 21 10 11 15 0 8 8 arp 88 50 0 37 1 0 1 1 0 8 0 ipq 40 10 0 9 2 1 1 1 0 8 0 ipqe 40 29 0 26 2 1 1 1 0 8 0 inpcb 360 2844 0 2827 23 12 11 14 0 8 8 nd6 104 52 0 37 1 0 1 1 0 8 0 pkpcb 40 9 0 9 1 0 1 1 0 8 1 kcovpl 48 17 0 9 1 0 1 1 0 8 0 ppxss 1072 9 0 9 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 968 0 631 29 2 27 29 0 8 3 art_table 32 969 0 631 4 0 4 4 0 8 0 art_node 16 263 0 192 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semupl 112 6 0 6 2 1 1 1 0 8 1 semapl 112 153 0 143 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 6052 0 4600 92 0 92 92 0 8 0 ffsino 240 6052 0 4600 86 0 86 86 0 8 0 nchpl 144 11020 0 9385 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 39034 0 39034 4 2 2 3 0 8 2 vcpupl 2048 94 0 1 12 0 12 12 0 8 0 vmpool 664 100 0 7 8 0 8 8 0 8 0 kstatmem 264 96 0 80 2 0 2 2 0 8 0 scxspl 216 34281 0 34281 10 7 3 8 1 8 3 plimitpl 152 606 0 591 1 0 1 1 0 8 0 sigapl 424 3992 0 3924 8 0 8 8 0 8 0 futexpl 64 32431 0 32426 2 1 1 1 0 8 0 knotepl 120 35780 0 35696 5 0 5 5 0 8 0 kqueuepl 184 587 0 579 7 3 4 4 0 8 3 pipepl 288 878 0 850 11 4 7 7 0 8 4 fdescpl 432 3894 0 3865 4 0 4 4 0 8 0 filepl 120 22465 0 22226 24 7 17 18 0 8 8 lockfpl 104 1017 0 1015 1 0 1 1 0 8 0 lockfspl 48 452 0 450 1 0 1 1 0 8 0 sessionpl 144 32 0 16 1 0 1 1 0 8 0 pgrppl 48 44 0 28 1 0 1 1 0 8 0 ucredpl 104 2325 0 2315 1 0 1 1 0 8 0 zombiepl 144 3925 0 3924 2 1 1 1 0 8 0 processpl 1072 3992 0 3924 5 0 5 5 0 8 0 procpl 680 9156 0 9067 10 1 9 9 0 8 1 sosppl 168 57 0 57 1 0 1 1 0 8 1 sockpl 488 5402 0 5367 78 65 13 35 0 8 8 mcl64k 65536 128 0 128 2 1 1 1 0 8 1 mcl16k 16384 88 0 88 2 1 1 1 0 8 1 mcl12k 12288 129 0 129 2 1 1 1 0 8 1 mcl9k 9216 49 0 49 2 1 1 1 0 8 1 mcl8k 8192 216 0 215 2 1 1 1 0 8 0 mcl4k 4096 378 0 378 2 1 1 1 0 8 1 mcl2k2 2112 23 0 23 2 1 1 1 0 8 1 mcl2k 2048 76931 0 76875 45 28 17 31 0 8 8 mtagpl 96 1295 0 959 19 1 18 18 0 8 4 mbufpl 256 155852 0 155427 509 456 53 436 0 8 8 bufpl 280 10377 0 3982 458 0 458 458 0 8 0 anonpl 24 511186 0 496952 138 23 115 115 0 188 23 amapchunkpl 152 111197 0 110331 40 1 39 39 0 158 4 amappl16 200 12339 0 11871 63 29 34 42 0 8 8 amappl15 192 41 0 39 1 0 1 1 0 8 0 amappl14 184 198 0 185 2 0 2 2 0 8 0 amappl13 176 42 0 41 1 0 1 1 0 8 0 amappl12 168 4638 0 4607 2 0 2 2 0 8 0 amappl11 160 77 0 67 1 0 1 1 0 8 0 amappl10 152 32 0 24 1 0 1 1 0 8 0 amappl9 144 160 0 160 2 1 1 1 0 8 1 amappl8 136 249 0 180 3 0 3 3 0 8 0 amappl7 128 211 0 187 2 0 2 2 0 8 0 amappl6 120 401 0 388 1 0 1 1 0 8 0 amappl5 112 174 0 165 1 0 1 1 0 8 0 amappl4 104 555 0 530 2 1 1 2 0 8 0 amappl3 96 22673 0 22582 3 0 3 3 0 8 0 amappl2 88 4505 0 4431 3 1 2 3 0 8 0 amappl1 80 22484 0 21963 22 10 12 22 0 8 0 amappl 88 34411 0 34168 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 3994 0 3872 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3994 0 3872 1 0 1 1 0 8 0 vmmpekpl 168 32259 0 32187 4 0 4 4 0 8 0 vmmpepl 168 250045 0 247660 154 22 132 132 0 357 22 vmsppl 352 3993 0 3872 12 0 12 12 0 8 0 rwobjpl 24 70239 0 62660 48 0 48 48 0 8 0 pdppl 4096 7994 0 7837 366 206 160 160 0 8 3 pvpl 32 1258056 0 1237976 402 199 203 362 0 265 35 pmappl 216 3993 0 3872 7 0 7 7 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1202 0 716 22 0 22 22 0 8 6 ddb> machine ddbcpu 0 No such command ddb> trace ffffffff8284428e(c23ab2522c7e4d6c,0,5973b2e5000,7e7c065de6c0,5951e885d75,b878d5e638bd00cf) at Xsyscall_trampback 5951e885513(3f9a707431e99de0,5951e8c5080,32,5951e8c50a0,5951e8c50a8,46ad2) at 0x5951e885513 5951e86f5db(c282fd51f74cae7f,bb8,12,4289,46a96,0) at 0x5951e86f5db 5951e86e615(7e7c065de860,7e7c065ded78,c,3,7e7c065dee80,eaa8e7ef) at 0x5951e86e615 5951e86c8b9(5951e86c8b9,7e7c065de850,7e7c065de860,7e7c065ded78,c,3) at 0x5951e86c8b9 5951e86c283(1c508f16acc25d50,2,7e7c065ded78,5951e86b5a0,7e7c065ded90,5951e8c17c0) at 0x5951e86c283 5951e86b992(0,0,0,7e7c065ded70,0,5951e8d50e8) at 0x5951e86b992 end trace frame: 0x0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ffffffff8284428e(c23ab2522c7e4d6c,0,5973b2e5000,7e7c065de6c0,5951e885d75,b878d5e638bd00cf) at Xsyscall_trampback 5951e885513(3f9a707431e99de0,5951e8c5080,32,5951e8c50a0,5951e8c50a8,46ad2) at 0x5951e885513 5951e86f5db(c282fd51f74cae7f,bb8,12,4289,46a96,0) at 0x5951e86f5db 5951e86e615(7e7c065de860,7e7c065ded78,c,3,7e7c065dee80,eaa8e7ef) at 0x5951e86e615 5951e86c8b9(5951e86c8b9,7e7c065de850,7e7c065de860,7e7c065ded78,c,3) at 0x5951e86c8b9 5951e86c283(1c508f16acc25d50,2,7e7c065ded78,5951e86b5a0,7e7c065ded90,5951e8c17c0) at 0x5951e86c283 5951e86b992(0,0,0,7e7c065ded70,0,5951e8d50e8) at 0x5951e86b992 end trace frame: 0x0, count: -7