kernel: protection fault trap, code=0 Stopped at sblock+0x4a: movq 0x8(%rax),%rax ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sblock(fffffd8067e5ca98,fffffd8067e5cbb0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8067e5ca98,fffffd8067e5cbb0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8067e5ca98,0,ffff800021633540,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021633490) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8066c91628,ffff800021633540,3,fffffd807f7d82a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000215f9510,fffffd8066c91628,fffffd807f7d82a0,ffff800021633608,ffff8000216335e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrsysret(ffff8000215f9510,30,0,ffff800021633720) at ktrsysret+0x17d ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrsysret(ffff8000215f9510,30,0,ffff800021633720) at ktrsysret+0x17d sys/kern/kern_ktrace.c:213 syscall(ffff800021633790) at syscall+0x561 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff800021633790) at syscall+0x561 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1fd0, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff800021633350 rbx 0xfffffd8067e5cbb0 rdx 0 rcx 0xffff8000215f9514 rax 0x2bb8bda5976f12a4 r8 0 r9 0 r10 0x59e03f459e9ed3de r11 0x410263432cbc5ef3 r12 0xfffffd8067e5ca01 r13 0x1 r14 0xfffffd8067e5cc00 r15 0xfffffd8067e5ca98 rip 0xffffffff811d97da sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000216332f0 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (sshd) pid=520174 stat=onproc flags process=12 proc=1 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000215f9270,0xffff8000215f8d40 process=0xffff8000215f1780 user=0xffff80002162e000, vmspace=0xfffffd807f019440 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 41606 224332 50167 0 2 0 syz-executor.6 41606 342451 50167 0 3 0x4000080 fsleep syz-executor.6 82737 289841 52115 0 2 0 syz-executor.3 82737 407547 52115 0 3 0x4000080 fsleep syz-executor.3 65339 426746 2148 0 2 0 syz-executor.0 65339 239392 2148 0 3 0x4000080 fsleep syz-executor.0 8845 510109 43069 0 2 0x82000 syz-executor.2 8845 424519 43069 0 3 0x4002000 suspend syz-executor.2 42803 339408 74424 0 2 0 syz-executor.1 42803 494765 74424 0 3 0x4000080 fsleep syz-executor.1 42803 38818 74424 0 3 0x4000080 fsleep syz-executor.1 42803 394519 74424 0 3 0x4000080 fsleep syz-executor.1 22754 460273 0 0 3 0x14200 bored sosplice 64813 495548 81572 0 2 0x83 syz-executor.7 19268 415640 81572 0 3 0x82 nanoslp syz-executor.5 50167 92002 81572 0 3 0x82 nanoslp syz-executor.6 43194 219374 81572 0 2 0x83 syz-executor.4 43069 467608 81572 0 3 0x82 nanoslp syz-executor.2 2148 334164 81572 0 3 0x82 nanoslp syz-executor.0 52115 301955 81572 0 3 0x82 nanoslp syz-executor.3 74424 142082 81572 0 3 0x82 nanoslp syz-executor.1 81572 110120 58687 0 3 0x82 thrsleep syz-fuzzer 81572 172255 58687 0 3 0x4000082 thrsleep syz-fuzzer 81572 267849 58687 0 3 0x4000082 thrsleep syz-fuzzer 81572 141697 58687 0 3 0x4000082 thrsleep syz-fuzzer 81572 204881 58687 0 3 0x4000082 thrsleep syz-fuzzer 81572 462665 58687 0 3 0x4000082 thrsleep syz-fuzzer 81572 402126 58687 0 3 0x4000082 kqread syz-fuzzer 81572 320050 58687 0 3 0x4000082 thrsleep syz-fuzzer 58687 380866 22378 0 3 0x10008a sigsusp ksh *22378 520174 22489 0 7 0x13 sshd 86912 448418 1 0 3 0x100083 ttyin getty 22489 365836 1 0 3 0x88 poll sshd 16432 364549 28586 73 3 0x100090 kqread syslogd 28586 293573 1 0 3 0x100082 netio syslogd 66046 305926 1 0 3 0x100080 kqread resolvd 44585 400381 17258 77 3 0x100092 kqread dhcpleased 7451 516857 17258 77 3 0x100092 kqread dhcpleased 17258 24838 1 0 3 0x80 kqread dhcpleased 16640 96612 0 0 3 0x14200 bored smr 54603 138421 0 0 2 0x14200 zerothread 96023 243230 0 0 3 0x14200 aiodoned aiodoned 3861 312412 0 0 3 0x14200 syncer update 37442 507993 0 0 3 0x14200 cleaner cleaner 41735 170714 0 0 3 0x14200 reaper reaper 68698 165450 0 0 3 0x14200 pgdaemon pagedaemon 96818 290055 0 0 3 0x14200 bored viomb 93558 459810 0 0 3 0x40014200 acpi0 acpi0 11190 214564 0 0 3 0x14200 bored softnet 87493 24450 0 0 3 0x14200 bored systqmp 38102 84749 0 0 3 0x14200 bored systq 60393 408530 0 0 3 0x40014200 bored softclock 84764 126811 0 0 3 0x40014200 idle0 1 497535 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 10158 6400K 6998K 78643K 12325 0 pcb 13 11K 12K 78643K 100 0 rtable 245 7K 10K 78643K 650 0 ifaddr 84 17K 18K 78643K 168 0 sysctl 2 0K 0K 78643K 2 0 counters 27 17K 17K 78643K 27 0 ioctlops 0 0K 4K 78643K 650 0 iov 0 0K 12K 78643K 30 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1277 80K 80K 78643K 1486 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 92 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 15 53K 77K 78643K 633 0 proc 61 63K 79K 78643K 471 0 subproc 104 13K 13K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 43 0 in_multi 99 6K 7K 78643K 281 0 ether_multi 1 0K 0K 78643K 12 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 638 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 288 78K 79K 78643K 9090 0 UVM aobj 17 2K 2K 78643K 17 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 42 0 NDP 11 0K 2K 78643K 66 0 temp 103 4681K 4745K 78643K 5773 0 kqueue 10 14K 20K 78643K 33 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 89 0 86 2 1 1 2 0 8 0 rtentry 112 152 0 40 4 0 4 4 0 8 0 unpcb 136 297 0 282 5 0 5 5 0 8 4 syncache 296 8 0 8 2 2 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 249 0 243 8 6 2 8 0 8 1 arp 88 18 0 0 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 9 0 7 1 0 1 1 0 8 0 inpcb 304 683 0 674 6 0 6 6 0 8 4 ip6q 72 10 0 9 1 0 1 1 0 8 0 ip6af 40 19 0 18 1 0 1 1 0 8 0 nd6 48 65 0 39 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfstscr 40 4 0 3 1 0 1 1 0 8 0 pfrke_plain 168 12 0 12 1 1 0 1 0 8 0 pfrktable 1344 36 0 36 1 1 0 1 0 8 0 pftag 88 7 0 6 2 1 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 6 1 0 1 1 0 8 0 pfstate 320 4 0 3 1 0 1 1 0 8 0 pfrule 1360 25 0 15 2 0 2 2 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 461 0 0 29 0 29 29 0 8 0 art_table 32 462 0 0 4 0 4 4 0 8 0 art_node 16 151 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 83 0 73 1 0 1 1 0 8 0 shmpl 112 14 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2188 0 756 90 0 90 90 0 8 0 ffsino 240 2188 0 756 85 0 85 85 0 8 0 nchpl 144 3151 0 1483 62 0 62 62 0 8 0 rtmask 32 8 0 8 1 1 0 1 0 8 0 uvmvnodes 80 2402 0 0 50 0 50 50 0 8 0 vnodes 224 2402 0 0 142 0 142 142 0 8 0 namei 1024 11491 0 11490 2 1 1 2 0 8 0 pfiaddrpl 120 11 0 11 1 1 0 1 0 8 0 scxspl 216 9642 0 9642 11 9 2 8 0 8 2 plimitpl 152 69 0 54 1 0 1 1 0 8 0 sigapl 424 909 0 869 6 1 5 6 0 8 0 futexpl 64 6262 0 6256 1 0 1 1 0 8 0 knotepl 112 579 0 505 4 1 3 3 0 8 0 kqueuepl 184 222 0 216 7 3 4 4 0 8 3 pipepl 304 240 0 212 3 0 3 3 0 8 0 fdescpl 432 895 0 869 4 0 4 4 0 8 0 filepl 120 5550 0 5310 17 3 14 14 0 8 6 lockfpl 104 276 0 273 1 0 1 1 0 8 0 lockfspl 48 130 0 127 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 7 1 0 1 1 0 8 0 ucredpl 96 655 0 645 1 0 1 1 0 8 0 zombiepl 144 869 0 868 1 0 1 1 0 8 0 processpl 1000 909 0 868 6 0 6 6 0 8 0 procpl 672 1742 0 1687 7 1 6 6 0 8 1 sosppl 168 7 0 7 1 1 0 1 0 8 0 sockpl 448 1069 0 1042 26 14 12 25 0 8 8 pool(sockpl): free list modified: page 0xfffffd8067e5c000; item ordinal 2; addr 0xfffffd8067e5ca98 (p 0xfffffd8067a09000); offset 0x10=0xdead9eef mcl64k 65536 21 0 21 2 1 1 1 0 8 1 mcl16k 16384 6 0 6 3 3 0 1 0 8 0 mcl12k 12288 22 0 22 3 2 1 1 0 8 1 mcl8k 8192 37 0 37 3 2 1 1 0 8 1 mcl4k 4096 68 0 68 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 3 2 1 1 0 8 1 mcl2k 2048 76980 0 76939 13 6 7 9 0 8 0 mtagpl 96 139 0 15 5 1 4 4 0 8 0 mbufpl 256 126334 0 125603 52 2 50 50 0 8 2 bufpl 288 4710 0 155 326 0 326 326 0 8 0 anonpl 24 206948 0 188056 123 4 119 123 0 188 1 amapchunkpl 152 22098 0 21339 36 3 33 34 0 158 2 amappl16 200 1966 0 1288 38 1 37 37 0 8 1 amappl15 192 145 0 139 1 0 1 1 0 8 0 amappl14 184 66 0 63 1 0 1 1 0 8 0 amappl13 176 144 0 140 1 0 1 1 0 8 0 amappl12 168 234 0 227 1 0 1 1 0 8 0 amappl11 160 58 0 46 1 0 1 1 0 8 0 amappl10 152 83 0 81 1 0 1 1 0 8 0 amappl9 144 584 0 576 1 0 1 1 0 8 0 amappl8 136 543 0 497 2 0 2 2 0 8 0 amappl7 128 109 0 102 1 0 1 1 0 8 0 amappl6 120 310 0 290 2 1 1 2 0 8 0 amappl5 112 665 0 650 1 0 1 1 0 8 0 amappl4 104 842 0 815 1 0 1 1 0 8 0 amappl3 96 487 0 473 1 0 1 1 0 8 0 amappl2 88 580 0 534 3 1 2 3 0 8 0 amappl1 80 18949 0 18406 19 6 13 18 0 8 0 amappl 88 8665 0 8445 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 16 0 0 1 0 1 1 0 8 0 uaddrrnd 24 895 0 869 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 895 0 869 1 0 1 1 0 8 0 vmmpekpl 168 10878 0 10842 2 0 2 2 0 8 0 vmmpepl 168 86166 0 83713 124 5 119 119 0 357 8 vmsppl 272 894 0 869 4 2 2 3 0 8 0 rwobjpl 24 23666 0 19666 25 0 25 25 0 8 0 pdppl 4096 1796 0 1738 118 54 64 70 0 8 6 pvpl 32 467858 0 444908 242 33 209 242 0 265 16 pmappl 216 894 0 869 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 772 0 94 20 0 20 20 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd8067e5ca98,fffffd8067e5cbb0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8067e5ca98,fffffd8067e5cbb0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8067e5ca98,0,ffff800021633540,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021633490) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8066c91628,ffff800021633540,3,fffffd807f7d82a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000215f9510,fffffd8066c91628,fffffd807f7d82a0,ffff800021633608,ffff8000216335e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrsysret(ffff8000215f9510,30,0,ffff800021633720) at ktrsysret+0x17d ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrsysret(ffff8000215f9510,30,0,ffff800021633720) at ktrsysret+0x17d sys/kern/kern_ktrace.c:213 syscall(ffff800021633790) at syscall+0x561 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff800021633790) at syscall+0x561 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1fd0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd8067e5ca98,fffffd8067e5cbb0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8067e5ca98,fffffd8067e5cbb0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8067e5ca98,0,ffff800021633540,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021633490) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8066c91628,ffff800021633540,3,fffffd807f7d82a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000215f9510,fffffd8066c91628,fffffd807f7d82a0,ffff800021633608,ffff8000216335e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrsysret(ffff8000215f9510,30,0,ffff800021633720) at ktrsysret+0x17d ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrsysret(ffff8000215f9510,30,0,ffff800021633720) at ktrsysret+0x17d sys/kern/kern_ktrace.c:213 syscall(ffff800021633790) at syscall+0x561 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff800021633790) at syscall+0x561 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd1fd0, count: -8