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(fffffd806e5658d0,fffffd806e5659e8,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e5658d0,fffffd806e5659e8,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e5658d0,0,ffff8000265135b0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff800026513500) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8060552630,ffff8000265135b0,3,fffffd807f7d77e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000215fd500,fffffd8060552630,fffffd807f7d77e0,ffff800026513678,ffff800026513650) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000215fd500,f8,1,ffff8000006c4440,c) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000215fd500,f8,1,ffff8000006c4440,c) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000215fd500,f8,ffff8000265137f8,0,ffff8000265138f0) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff8000215fd500,ffff800026513890,ffff8000265138f0) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff800026513960) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9500, count: -10 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000265133c0 rbx 0xfffffd806e5659e8 rdx 0 rcx 0xffff8000215fd504 rax 0xdad14de36cd6e5ab r8 0 r9 0 r10 0x926c7f16bf18912d r11 0xa8013f7345db3990 r12 0xfffffd806e565801 r13 0x1 r14 0xfffffd806e565a38 r15 0xfffffd806e5658d0 rip 0xffffffff812fce6a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800026513360 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (syz-executor.2) pid=239811 stat=onproc flags process=2 proc=1 pri=24, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000215fc000,0xffff8000215fd270 process=0xffff800021617790 user=0xffff80002650e000, vmspace=0xfffffd806c62e120 estcpu=32, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 20879 374422 35838 0 3 0x80 nanoslp syz-executor.1 20879 52428 35838 0 2 0x4000081 syz-executor.1 20879 180939 35838 0 2 0x4000081 syz-executor.1 20879 317359 35838 0 3 0x4000080 ttyin syz-executor.1 63328 116815 11133 0 3 0x82 nanoslp syz-executor.7 9774 357520 11133 0 2 0x2 syz-executor.6 72020 304879 11133 0 2 0x83 syz-executor.5 41616 387221 11133 0 2 0x83 syz-executor.3 *86924 239811 11133 0 7 0x3 syz-executor.2 10464 402158 11133 0 2 0x83 syz-executor.4 46153 284905 11133 0 2 0x83 syz-executor.0 35838 373854 11133 0 3 0x82 nanoslp syz-executor.1 11133 265787 87419 0 3 0x82 thrsleep syz-fuzzer 11133 499651 87419 0 3 0x4000082 nanoslp syz-fuzzer 11133 140528 87419 0 2 0x4000083 syz-fuzzer 11133 160709 87419 0 3 0x4000082 thrsleep syz-fuzzer 11133 9687 87419 0 2 0x4000083 syz-fuzzer 11133 338378 87419 0 2 0x4000083 syz-fuzzer 11133 435625 87419 0 2 0x4000083 syz-fuzzer 11133 382156 87419 0 3 0x4000082 thrsleep syz-fuzzer 11133 284961 87419 0 2 0x4000083 syz-fuzzer 11133 422945 87419 0 2 0x4000002 syz-fuzzer 87419 268998 8727 0 3 0x10008a sigsusp ksh 8727 427089 88648 0 2 0x12 sshd 67141 402596 1 0 3 0x100083 ttyin getty 88648 226601 1 0 3 0x88 kqread sshd 91105 443282 19042 73 3 0x1100090 kqread syslogd 19042 196404 1 0 3 0x100082 netio syslogd 20415 206973 1 0 3 0x100080 kqread resolvd 48386 460828 68687 77 3 0x100092 kqread dhcpleased 88580 363415 68687 77 3 0x100092 kqread dhcpleased 68687 77200 1 0 3 0x80 kqread dhcpleased 46363 349634 0 0 3 0x14200 bored smr 71635 454095 0 0 2 0x14200 zerothread 63853 215855 0 0 3 0x14200 aiodoned aiodoned 57517 160308 0 0 3 0x14200 syncer update 80628 350146 0 0 3 0x14200 cleaner cleaner 44871 207500 0 0 3 0x14200 reaper reaper 27638 254076 0 0 3 0x14200 pgdaemon pagedaemon 39356 448420 0 0 3 0x14200 bored viomb 78704 151137 0 0 3 0x40014200 acpi0 acpi0 76353 330110 0 0 2 0x14200 softnet 71179 17973 0 0 3 0x14200 bored systqmp 10827 242503 0 0 3 0x14200 bored systq 10880 309544 0 0 3 0x40014200 bored softclock 95022 303656 0 0 3 0x40014200 idle0 1 57848 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 10159 6400K 7054K 78643K 12027 0 pcb 13 12K 17K 78643K 488 0 rtable 218 6K 6K 78643K 395 0 ifaddr 82 17K 17K 78643K 96 0 sysctl 2 0K 0K 78643K 2 0 counters 27 17K 17K 78643K 30 0 ioctlops 0 0K 4K 78643K 164 0 iov 0 0K 16K 78643K 9 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1277 80K 80K 78643K 1438 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 0K 0K 78643K 2 0 sem 9 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 77K 78643K 350 0 proc 57 59K 91K 78643K 470 0 subproc 104 6K 6K 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 13 0 in_multi 99 6K 6K 78643K 115 0 ether_multi 1 0K 0K 78643K 12 0 mrt 1 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 2K 78643K 675 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 208 126K 126K 78643K 3300 0 UVM aobj 13 7K 7K 78643K 13 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 6 0 NDP 11 0K 1K 78643K 30 0 temp 114 4715K 4778K 78643K 4480 0 kqueue 12 18K 22K 78643K 29 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 47 0 44 1 0 1 1 0 8 0 rtentry 112 115 0 13 4 0 4 4 0 8 0 unpcb 136 77 0 64 1 0 1 1 0 8 0 syncache 296 7 0 7 2 2 0 1 0 8 0 tcpqe 32 75 0 75 1 1 0 1 0 8 0 tcpcb 736 39 0 35 2 1 1 2 0 8 0 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 312 571 0 564 11 2 9 11 0 8 8 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 48 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1152 3 0 3 1 1 0 1 0 8 0 pfrule 1360 5 0 0 1 0 1 1 0 8 0 rttmrq 48 7 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 507 0 65 29 1 28 29 0 8 0 art_table 32 508 0 65 4 0 4 4 0 8 0 art_node 16 114 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 72 0 69 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 7 0 0 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1820 0 388 90 0 90 90 0 8 0 ffsino 240 1820 0 388 85 0 85 85 0 8 0 nchpl 144 2413 0 728 63 0 63 63 0 8 0 uvmvnodes 80 2006 0 0 41 0 41 41 0 8 0 vnodes 224 2006 0 0 118 0 118 118 0 8 0 namei 1024 8127 0 8125 2 1 1 2 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 528 8 0 3 1 0 1 1 0 8 0 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scxspl 216 6892 0 6892 9 2 7 8 0 8 7 plimitpl 152 39 0 25 1 0 1 1 0 8 0 sigapl 424 638 0 602 6 0 6 6 0 8 0 futexpl 64 2734 0 2734 1 0 1 1 0 8 1 knotepl 120 9049 0 8968 4 0 4 4 0 8 0 kqueuepl 184 38 0 30 1 0 1 1 0 8 0 pipepl 304 149 0 121 3 0 3 3 0 8 0 fdescpl 432 625 0 603 4 0 4 4 0 8 0 filepl 120 3404 0 3167 12 0 12 12 0 8 4 lockfpl 104 20 0 18 1 0 1 1 0 8 0 lockfspl 48 11 0 9 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 96 370 0 360 1 0 1 1 0 8 0 zombiepl 144 603 0 602 1 0 1 1 0 8 0 processpl 1000 638 0 602 6 0 6 6 0 8 0 procpl 672 1089 0 1041 7 1 6 7 0 8 0 sockpl 448 695 0 672 18 7 11 18 0 8 8 pool(sockpl): free list modified: page 0xfffffd806e565000; item ordinal 0; addr 0xfffffd806e5658d0 (p 0xfffffd806eb4c000); offset 0x10=0xdeaf9ead mcl64k 65536 18 0 18 1 0 1 1 0 8 1 mcl16k 16384 5 0 5 2 1 1 1 0 8 1 mcl12k 12288 18 0 18 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 25 0 25 2 1 1 1 0 8 1 mcl4k 4096 35 0 34 2 1 1 1 0 8 0 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 76823 0 76772 14 6 8 13 0 8 0 mtagpl 96 98 0 4 4 1 3 3 0 8 0 mbufpl 256 124669 0 124297 36 2 34 36 0 8 8 bufpl 288 3825 0 149 263 0 263 263 0 8 0 anonpl 24 102905 0 85922 110 1 109 109 0 188 0 amapchunkpl 152 8426 0 7854 28 2 26 27 0 158 0 amappl16 200 1286 0 656 34 0 34 34 0 8 0 amappl15 192 62 0 62 1 0 1 1 0 8 1 amappl14 184 41 0 36 1 0 1 1 0 8 0 amappl13 176 148 0 141 1 0 1 1 0 8 0 amappl12 168 109 0 103 2 1 1 1 0 8 0 amappl11 160 112 0 96 1 0 1 1 0 8 0 amappl10 152 14 0 12 1 0 1 1 0 8 0 amappl9 144 499 0 495 1 0 1 1 0 8 0 amappl8 136 540 0 501 2 0 2 2 0 8 0 amappl7 128 104 0 94 1 0 1 1 0 8 0 amappl6 120 194 0 179 2 1 1 2 0 8 0 amappl5 112 150 0 142 1 0 1 1 0 8 0 amappl4 104 879 0 850 2 0 2 2 0 8 0 amappl3 96 1343 0 1302 2 0 2 2 0 8 0 amappl2 88 1006 0 946 3 1 2 3 0 8 0 amappl1 80 16540 0 16006 20 6 14 19 0 8 0 amappl 88 2853 0 2724 4 0 4 4 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 633 0 606 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 633 0 606 1 0 1 1 0 8 0 vmmpekpl 168 9412 0 9373 3 0 3 3 0 8 0 vmmpepl 168 64285 0 62154 159 10 149 159 0 357 35 vmsppl 272 632 0 606 4 1 3 3 0 8 0 rwobjpl 24 18313 0 14779 23 0 23 23 0 8 0 pdppl 4096 1272 0 1217 110 41 69 70 0 8 14 pvpl 32 325231 0 304542 240 17 223 240 0 265 44 pmappl 216 632 0 606 2 0 2 2 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 679 0 67 18 0 18 18 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd806e5658d0,fffffd806e5659e8,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e5658d0,fffffd806e5659e8,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e5658d0,0,ffff8000265135b0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff800026513500) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8060552630,ffff8000265135b0,3,fffffd807f7d77e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000215fd500,fffffd8060552630,fffffd807f7d77e0,ffff800026513678,ffff800026513650) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000215fd500,f8,1,ffff8000006c4440,c) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000215fd500,f8,1,ffff8000006c4440,c) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000215fd500,f8,ffff8000265137f8,0,ffff8000265138f0) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff8000215fd500,ffff800026513890,ffff8000265138f0) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff800026513960) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9500, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd806e5658d0,fffffd806e5659e8,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e5658d0,fffffd806e5659e8,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e5658d0,0,ffff8000265135b0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff800026513500) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8060552630,ffff8000265135b0,3,fffffd807f7d77e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000215fd500,fffffd8060552630,fffffd807f7d77e0,ffff800026513678,ffff800026513650) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000215fd500,f8,1,ffff8000006c4440,c) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000215fd500,f8,1,ffff8000006c4440,c) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000215fd500,f8,ffff8000265137f8,0,ffff8000265138f0) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff8000215fd500,ffff800026513890,ffff8000265138f0) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff800026513960) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9500, count: -10