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(fffffd806e535e10,fffffd806e535f28,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e535e10,fffffd806e535f28,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e535e10,0,ffff8000216957b0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021695700) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd80686afd30,ffff8000216957b0,3,fffffd807f7d8540) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002165ea90,fffffd80686afd30,fffffd807f7d8540,ffff800021695870,ffff800021695850) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff80002165ea90,4,1,ffff800000c6b8f0,1e4) at ktrgenio+0x26b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff80002165ea90,4,1,ffff800000c6b8f0,1e4) at ktrgenio+0x26b sys/kern/kern_ktrace.c:265 dofilewritev(ffff80002165ea90,4,ffff8000216959f8,0,ffff800021695af0) at dofilewritev+0x38a sys/kern/sys_generic.c:401 sys_write(ffff80002165ea90,ffff800021695a90,ffff800021695af0) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff800021695b60) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff35b0, count: -10 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000216955c0 rbx 0xfffffd806e535f28 rdx 0 rcx 0xffff80002165ea94 rax 0x8b380a7fed2d854a r8 0 r9 0 r10 0x3605e659e6f5a33c r11 0x2edd5324bc132697 r12 0xfffffd806e535e01 r13 0x1 r14 0xfffffd806e535f78 r15 0xfffffd806e535e10 rip 0xffffffff81b1bf8a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021695560 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (sshd) pid=485613 stat=onproc flags process=12 proc=1 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80002165e550,0xffff80002165e2c0 process=0xffff800021670fb8 user=0xffff800021690000, vmspace=0xfffffd807f019bb0 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 85986 40856 23075 0 3 0x80 nanoslp syz-executor.1 85986 418095 23075 0 3 0x4000080 fsleep syz-executor.1 85986 131422 23075 0 3 0x4000080 fsleep syz-executor.1 53541 14377 3566 0 3 0x82 nanoslp syz-executor.0 72606 266172 3566 0 3 0x82 nanoslp syz-executor.3 15507 290579 0 0 3 0x14280 nfsidl nfsio 30582 436328 0 0 3 0x14280 nfsidl nfsio 85253 303586 0 0 3 0x14280 nfsidl nfsio 48981 193892 0 0 3 0x14280 nfsidl nfsio 97093 420094 0 0 3 0x14280 nfsidl nfsio 11424 207582 0 0 3 0x14280 nfsidl nfsio 78851 207619 0 0 3 0x14280 nfsidl nfsio 82609 336169 0 0 3 0x14280 nfsidl nfsio 34573 113458 0 0 3 0x14280 nfsidl nfsio 61838 445383 0 0 3 0x14280 nfsidl nfsio 18545 227353 0 0 3 0x14280 nfsidl nfsio 43246 176667 0 0 3 0x14280 nfsidl nfsio 9037 20358 0 0 3 0x14280 nfsidl nfsio 29496 432434 0 0 3 0x14280 nfsidl nfsio 34748 160581 0 0 3 0x14280 nfsidl nfsio 22985 468228 0 0 3 0x14280 nfsidl nfsio 33140 278222 0 0 3 0x14280 nfsidl nfsio 27165 394401 0 0 3 0x14280 nfsidl nfsio 57843 516918 0 0 3 0x14280 nfsidl nfsio 5060 152983 0 0 3 0x14280 nfsidl nfsio 19409 31386 0 0 3 0x14200 bored sosplice 46081 96430 0 0 3 0x14200 acct acct 69548 185905 3566 0 2 0x83 syz-executor.2 23075 190434 3566 0 3 0x82 nanoslp syz-executor.1 3566 4642 58733 0 3 0x82 kqread syz-fuzzer 3566 155770 58733 0 3 0x4000082 thrsleep syz-fuzzer 3566 193035 58733 0 3 0x4000082 thrsleep syz-fuzzer 3566 275386 58733 0 3 0x4000082 thrsleep syz-fuzzer 3566 22707 58733 0 3 0x4000082 thrsleep syz-fuzzer 3566 42816 58733 0 3 0x4000082 thrsleep syz-fuzzer 3566 77292 58733 0 3 0x4000082 thrsleep syz-fuzzer 3566 162281 58733 0 3 0x4000082 thrsleep syz-fuzzer 58733 16994 93459 0 3 0x10008a sigsusp ksh *93459 485613 55004 0 7 0x13 sshd 32581 496358 1 0 3 0x100083 ttyin getty 55004 18299 1 0 3 0x88 poll sshd 14671 425481 27763 73 3 0x100090 kqread syslogd 27763 364520 1 0 3 0x100082 netio syslogd 34248 466753 1 0 3 0x100080 kqread resolvd 56280 252172 24479 77 3 0x100092 kqread dhcpleased 76374 392600 24479 77 3 0x100092 kqread dhcpleased 24479 187428 1 0 3 0x80 kqread dhcpleased 7017 426685 0 0 3 0x14200 bored smr 73973 405307 0 0 2 0x14200 zerothread 97249 77650 0 0 3 0x14200 aiodoned aiodoned 61608 58501 0 0 3 0x14200 syncer update 9170 387989 0 0 3 0x14200 cleaner cleaner 61208 473362 0 0 3 0x14200 reaper reaper 80041 50404 0 0 3 0x14200 pgdaemon pagedaemon 63052 435419 0 0 3 0x14200 bored viomb 33184 248201 0 0 3 0x40014200 acpi0 acpi0 15062 285195 0 0 3 0x14200 bored softnet 30522 49811 0 0 3 0x14200 bored systqmp 36117 467426 0 0 3 0x14200 bored systq 37825 396275 0 0 3 0x40014200 bored softclock 41856 347656 0 0 3 0x40014200 idle0 1 422309 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 10177 6405K 6790K 78643K 13518 0 pcb 13 14K 16K 78643K 221 0 rtable 136 13K 18K 78643K 649 0 ifaddr 54 12K 14K 78643K 216 0 sysctl 2 0K 0K 78643K 2 0 counters 23 16K 17K 78643K 41 0 ioctlops 0 0K 4K 78643K 566 0 iov 0 0K 28K 78643K 221 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1294 81K 81K 78643K 1876 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 20 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 449 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 49K 78643K 1498 0 sigio 0 0K 0K 78643K 8 0 proc 58 55K 87K 78643K 471 0 subproc 52 3K 3K 78643K 78 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 136 0 in_multi 43 2K 4K 78643K 181 0 ether_multi 1 0K 0K 78643K 29 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 229 1023K 1023K 78643K 229 0 exec 0 0K 2K 78643K 648 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 244 145K 146K 78643K 19724 0 UVM aobj 131 8K 8K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 115 0 NDP 8 0K 1K 78643K 44 0 temp 101 4194K 4270K 78643K 17783 0 kqueue 10 14K 18K 78643K 46 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 120 132 0 129 2 1 1 2 0 8 0 rtentry 112 107 0 53 2 0 2 2 0 8 0 unpcb 128 1215 0 1200 12 8 4 5 0 8 3 syncache 296 8 0 8 3 3 0 1 0 8 0 tcpqe 32 84 0 84 3 3 0 1 0 8 0 tcpcb 736 1359 0 1350 30 21 9 12 0 8 8 arp 88 14 0 8 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 304 2420 0 2411 33 27 6 14 0 8 5 nd6 48 33 0 22 1 0 1 1 0 8 0 kcovpl 48 6 0 2 1 0 1 1 0 8 0 ppxss 1152 13 0 13 3 3 0 1 0 8 0 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pfrktable 1344 103 0 103 3 2 1 1 0 8 1 pftag 88 14 0 14 2 1 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 10 0 8 1 0 1 1 0 8 0 pfstate 320 5 0 4 1 0 1 1 0 8 0 pfrule 1360 230 0 184 6 2 4 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 401 0 156 19 2 17 19 0 8 1 art_table 32 402 0 156 3 0 3 3 0 8 0 art_node 16 106 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 87 0 73 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 447 0 437 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3401 0 1981 89 0 89 89 0 8 0 ffsino 240 3401 0 1981 84 0 84 84 0 8 0 nchpl 144 5733 0 4149 61 0 61 61 0 8 0 uvmvnodes 80 3959 0 0 81 0 81 81 0 8 0 vnodes 224 3959 0 0 233 0 233 233 0 8 0 namei 1024 19470 0 19470 1 0 1 1 0 8 1 vcpupl 1984 41 0 0 6 0 6 6 0 8 0 vmpool 528 48 0 7 3 0 3 3 0 8 0 pfiaddrpl 120 31 0 31 3 2 1 1 0 8 1 scxspl 216 17220 0 17220 10 9 1 8 0 8 1 plimitpl 152 358 0 347 1 0 1 1 0 8 0 sigapl 424 1735 0 1682 8 1 7 7 0 8 0 futexpl 64 16075 0 16073 1 0 1 1 0 8 0 knotepl 112 592 0 542 2 0 2 2 0 8 0 kqueuepl 184 349 0 343 8 6 2 4 0 8 1 pipepl 304 362 0 346 7 0 7 7 0 8 5 fdescpl 432 1700 0 1682 3 0 3 3 0 8 0 filepl 120 13327 0 13176 27 18 9 11 0 8 4 lockfpl 104 606 0 604 3 1 2 2 0 8 1 lockfspl 48 102 0 100 1 0 1 1 0 8 0 sessionpl 144 21 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 13 1 0 1 1 0 8 0 ucredpl 96 1369 0 1359 1 0 1 1 0 8 0 zombiepl 144 1682 0 1680 1 0 1 1 0 8 0 processpl 1000 1735 0 1680 8 0 8 8 0 8 0 procpl 672 4109 0 4045 8 1 7 7 0 8 0 sosppl 168 20 0 20 2 1 1 1 0 8 1 sockpl 448 3767 0 3740 60 49 11 21 0 8 7 pool(sockpl): free list modified: page 0xfffffd806e535000; item ordinal 0; addr 0xfffffd806e535e10 (p 0xfffffd806eb19000); offset 0x10=0xdeaf9ead mcl64k 65536 40 0 40 2 1 1 1 0 8 1 mcl16k 16384 25 0 25 4 3 1 1 0 8 1 mcl12k 12288 29 0 29 5 4 1 1 0 8 1 mcl9k 9216 28 0 28 3 2 1 1 0 8 1 mcl8k 8192 52 0 52 6 5 1 1 0 8 1 mcl4k 4096 153 0 153 4 3 1 1 0 8 1 mcl2k2 2112 11 0 11 3 3 0 1 0 8 0 mcl2k 2048 78335 0 78293 13 6 7 11 0 8 0 mtagpl 96 365 0 133 7 1 6 6 0 8 0 mbufpl 256 135918 0 135257 51 8 43 43 0 8 0 bufpl 288 6501 0 131 455 0 455 455 0 8 0 anonpl 24 449311 0 430929 144 21 123 140 0 188 7 amapchunkpl 152 48452 0 47828 47 18 29 39 0 158 1 amappl16 200 4631 0 3949 51 13 38 49 0 8 1 amappl15 192 529 0 529 1 0 1 1 0 8 1 amappl14 184 280 0 278 1 0 1 1 0 8 0 amappl13 176 51 0 50 1 0 1 1 0 8 0 amappl12 168 11 0 8 1 0 1 1 0 8 0 amappl11 160 840 0 827 1 0 1 1 0 8 0 amappl10 152 44 0 38 1 0 1 1 0 8 0 amappl9 144 457 0 454 1 0 1 1 0 8 0 amappl8 136 399 0 360 2 0 2 2 0 8 0 amappl7 128 80 0 69 1 0 1 1 0 8 0 amappl6 120 160 0 144 1 0 1 1 0 8 0 amappl5 112 1240 0 1226 1 0 1 1 0 8 0 amappl4 104 1816 0 1791 1 0 1 1 0 8 0 amappl3 96 234 0 218 1 0 1 1 0 8 0 amappl2 88 429 0 383 2 0 2 2 0 8 0 amappl1 80 33634 0 33196 12 1 11 12 0 8 0 amappl 88 19315 0 19147 5 0 5 5 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 1748 0 1689 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1748 0 1689 1 0 1 1 0 8 0 vmmpekpl 168 15577 0 15548 2 0 2 2 0 8 0 vmmpepl 168 158691 0 156562 170 46 124 135 0 357 21 vmsppl 272 1747 0 1689 6 1 5 5 0 8 1 rwobjpl 24 43064 0 37523 34 0 34 34 0 8 0 pdppl 4096 3502 0 3419 120 31 89 91 0 8 6 pvpl 32 802532 0 781461 219 25 194 212 0 265 17 pmappl 216 1747 0 1689 4 0 4 4 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 957 0 134 24 0 24 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd806e535e10,fffffd806e535f28,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e535e10,fffffd806e535f28,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e535e10,0,ffff8000216957b0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021695700) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd80686afd30,ffff8000216957b0,3,fffffd807f7d8540) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002165ea90,fffffd80686afd30,fffffd807f7d8540,ffff800021695870,ffff800021695850) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff80002165ea90,4,1,ffff800000c6b8f0,1e4) at ktrgenio+0x26b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff80002165ea90,4,1,ffff800000c6b8f0,1e4) at ktrgenio+0x26b sys/kern/kern_ktrace.c:265 dofilewritev(ffff80002165ea90,4,ffff8000216959f8,0,ffff800021695af0) at dofilewritev+0x38a sys/kern/sys_generic.c:401 sys_write(ffff80002165ea90,ffff800021695a90,ffff800021695af0) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff800021695b60) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff35b0, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd806e535e10,fffffd806e535f28,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e535e10,fffffd806e535f28,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e535e10,0,ffff8000216957b0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021695700) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd80686afd30,ffff8000216957b0,3,fffffd807f7d8540) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002165ea90,fffffd80686afd30,fffffd807f7d8540,ffff800021695870,ffff800021695850) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff80002165ea90,4,1,ffff800000c6b8f0,1e4) at ktrgenio+0x26b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff80002165ea90,4,1,ffff800000c6b8f0,1e4) at ktrgenio+0x26b sys/kern/kern_ktrace.c:265 dofilewritev(ffff80002165ea90,4,ffff8000216959f8,0,ffff800021695af0) at dofilewritev+0x38a sys/kern/sys_generic.c:401 sys_write(ffff80002165ea90,ffff800021695a90,ffff800021695af0) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff800021695b60) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff35b0, count: -10