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(fffffd806e520a90,fffffd806e520ba8,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e520a90,fffffd806e520ba8,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e520a90,0,ffff80002167b970,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff80002167b8c0) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8076c8e340,ffff80002167b970,3,fffffd807f7d8a20) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021667270,fffffd8076c8e340,fffffd807f7d8a20,ffff80002167ba38,ffff80002167ba10) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrsysret(ffff800021667270,57,0,ffff80002167bb50) at ktrsysret+0x17d ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrsysret(ffff800021667270,57,0,ffff80002167bb50) at ktrsysret+0x17d sys/kern/kern_ktrace.c:213 syscall(ffff80002167bbc0) at syscall+0x561 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff80002167bbc0) at syscall+0x561 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5570, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002167b780 rbx 0xfffffd806e520ba8 rdx 0 rcx 0xffff800021667274 rax 0xbef0563fca38d79c r8 0 r9 0 r10 0x4c03f4c4d7cf3bc0 r11 0x4a795b8d4feeeae r12 0xfffffd806e520a01 r13 0x1 r14 0xfffffd806e520bf8 r15 0xfffffd806e520a90 rip 0xffffffff81278e8a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002167b720 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (sshd) pid=197026 stat=onproc flags process=12 proc=1 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021666d30,0xffff800021666560 process=0xffff800021668bd0 user=0xffff800021676000, vmspace=0xfffffd807f018bb0 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 26730 116160 18244 0 2 0x81 syz-executor.0 93605 442184 70407 0 2 0 syz-executor.3 93605 86556 70407 0 2 0x4000000 syz-executor.3 93605 443186 70407 0 3 0x4000080 fsleep syz-executor.3 70407 187972 30930 0 3 0x82 nanoslp syz-executor.3 18244 347035 30930 0 3 0x82 nanoslp syz-executor.0 95754 204011 30930 0 2 0x83 syz-executor.2 73896 325696 30930 0 3 0x82 nanoslp syz-executor.1 33142 99640 1 0 3 0x100083 ttyin getty 23177 256813 0 0 3 0x14200 bored sosplice 24365 169259 0 0 3 0x14280 nfsidl nfsio 41838 282958 0 0 3 0x14280 nfsidl nfsio 47299 98123 0 0 3 0x14280 nfsidl nfsio 11785 241403 0 0 3 0x14280 nfsidl nfsio 27126 258533 0 0 3 0x14280 nfsidl nfsio 48968 213586 0 0 3 0x14280 nfsidl nfsio 30930 400127 55178 0 3 0x82 thrsleep syz-fuzzer 30930 20294 55178 0 3 0x4000082 nanoslp syz-fuzzer 30930 250669 55178 0 3 0x4000082 thrsleep syz-fuzzer 30930 417615 55178 0 3 0x4000082 thrsleep syz-fuzzer 30930 352149 55178 0 3 0x4000082 thrsleep syz-fuzzer 30930 341624 55178 0 3 0x4000082 thrsleep syz-fuzzer 30930 365269 55178 0 3 0x4000082 thrsleep syz-fuzzer 30930 66446 55178 0 2 0x4000083 syz-fuzzer 55178 128795 5187 0 3 0x10008a sigsusp ksh * 5187 197026 2721 0 7 0x13 sshd 2721 374835 1 0 3 0x88 poll sshd 3649 244437 94528 73 3 0x100090 kqread syslogd 94528 512550 1 0 3 0x100082 netio syslogd 37626 253613 1 0 3 0x100080 kqread resolvd 59874 488353 17903 77 3 0x100092 kqread dhcpleased 38209 222380 17903 77 3 0x100092 kqread dhcpleased 17903 356161 1 0 3 0x80 kqread dhcpleased 64536 147104 0 0 3 0x14200 bored smr 84683 295730 0 0 2 0x14200 zerothread 57544 213235 0 0 3 0x14200 aiodoned aiodoned 89292 322533 0 0 3 0x14200 syncer update 16345 41096 0 0 3 0x14200 cleaner cleaner 7898 263595 0 0 3 0x14200 reaper reaper 78043 77159 0 0 3 0x14200 pgdaemon pagedaemon 41107 433310 0 0 3 0x14200 bored viomb 11987 316102 0 0 3 0x40014200 acpi0 acpi0 73248 39090 0 0 3 0x14200 bored softnet 73399 109682 0 0 3 0x14200 bored systqmp 60390 400648 0 0 3 0x14200 bored systq 30209 276869 0 0 3 0x40014200 bored softclock 61021 251712 0 0 3 0x40014200 idle0 1 473950 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 10228 6593K 18701K 78643K 23625 0 pcb 13 22K 24K 78643K 1657 0 rtable 190 26K 27K 78643K 3074 0 ifaddr 84 21K 22K 78643K 3571 0 sysctl 3 1K 2K 78643K 7 0 counters 23 16K 17K 78643K 113 0 ioctlops 0 0K 4K 78643K 27088 0 iov 0 0K 16K 78643K 1166 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1420 89K 90K 78643K 6544 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 87 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 1000 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 45K 78643K 18107 0 sigio 0 0K 0K 78643K 81 0 proc 60 55K 71K 78643K 1361 0 subproc 52 6K 6K 78643K 416 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 324 0 in_multi 45 3K 4K 78643K 632 0 ether_multi 1 0K 0K 78643K 84 0 mrt 1 0K 0K 78643K 26 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 1740 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 348 504K 687K 78643K 218699 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 302 0 NDP 8 0K 1K 78643K 182 0 temp 115 4225K 4290K 78643K 145580 0 kqueue 10 14K 20K 78643K 438 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 120 398 0 395 8 7 1 3 0 8 0 rtentry 112 452 0 401 3 1 2 3 0 8 0 unpcb 136 8390 0 8377 95 94 1 6 0 8 0 syncache 296 40 0 40 11 11 0 1 0 8 0 tcpqe 32 413 0 413 5 5 0 1 0 8 0 tcpcb 736 20837 0 20810 483 473 10 38 0 8 6 arp 88 70 0 60 1 0 1 1 0 8 0 ipq 40 12 0 12 5 5 0 1 0 8 0 ipqe 40 31 0 31 5 5 0 1 0 8 0 inpcb 304 26166 0 26157 247 241 6 16 0 8 5 rttmr 72 3 0 3 1 1 0 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 128 0 119 1 0 1 1 0 8 0 pkpcb 40 74 0 74 1 1 0 1 0 8 0 kcovpl 48 32 0 28 1 0 1 1 0 8 0 ppxss 1152 34 0 34 7 7 0 1 0 8 0 pfstscr 40 24 0 24 3 3 0 1 0 8 0 pfosfp 40 5 0 4 1 0 1 1 0 8 0 pfosfpen 112 5 0 4 1 0 1 1 0 8 0 pfrktable 1344 826 0 798 11 8 3 3 0 8 0 pftag 88 213 0 195 2 1 1 1 0 8 0 pfqueue 264 5 0 2 2 1 1 1 0 8 0 pfstitem 24 4 0 4 2 2 0 1 0 8 0 pfstkey 112 32 0 32 3 3 0 1 0 8 0 pfstate 320 16 0 16 3 3 0 1 0 8 0 pfrule 1360 10535 0 7167 282 1 281 281 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2113 0 1880 41 23 18 28 0 8 0 art_table 32 2114 0 1880 6 3 3 4 0 8 0 art_node 16 451 0 407 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 0 1 0 1 1 0 8 0 semapl 112 998 0 988 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 23020 0 21586 90 0 90 90 0 8 0 ffsino 240 23020 0 21586 85 0 85 85 0 8 0 nchpl 144 44528 0 42945 61 0 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 153284 0 153284 4 3 1 1 0 8 1 vcpupl 1984 64 0 0 8 0 8 8 0 8 0 vmpool 528 111 0 47 5 0 5 5 0 8 0 pfiaddrpl 120 358 0 133 9 2 7 7 0 8 0 scsiplug 72 16 0 16 4 3 1 1 0 8 1 scxspl 216 149053 0 149053 17 16 1 8 0 8 1 plimitpl 152 924 0 914 1 0 1 1 0 8 0 sigapl 424 18249 0 18210 6 1 5 5 0 8 0 futexpl 64 158484 0 158483 3 2 1 1 0 8 0 knotepl 112 5068 0 5018 5 3 2 3 0 8 0 kqueuepl 184 2411 0 2399 52 48 4 4 0 8 3 pipepl 304 3005 0 2989 98 96 2 9 0 8 0 fdescpl 432 18229 0 18210 3 0 3 3 0 8 0 filepl 120 121143 0 120994 189 180 9 15 0 8 4 lockfpl 104 2997 0 2995 9 8 1 4 0 8 0 lockfspl 48 1042 0 1040 1 0 1 1 0 8 0 sessionpl 144 48 0 36 1 0 1 1 0 8 0 pgrppl 48 150 0 138 1 0 1 1 0 8 0 ucredpl 96 8307 0 8297 1 0 1 1 0 8 0 zombiepl 144 18210 0 18209 1 0 1 1 0 8 0 processpl 1000 18249 0 18209 6 0 6 6 0 8 0 procpl 672 43869 0 43820 39 33 6 7 0 8 0 sosppl 168 32 0 32 7 6 1 1 0 8 1 sockpl 448 35045 0 35020 491 480 11 28 0 8 8 pool(sockpl): free list modified: page 0xfffffd806e520000; item ordinal 0; addr 0xfffffd806e520a90 (p 0xfffffd806eafb000); offset 0x10=0xdead9eef mcl64k 65536 527 0 527 45 44 1 1 0 8 1 mcl16k 16384 89 0 89 27 27 0 1 0 8 0 mcl12k 12288 387 0 387 44 43 1 1 0 8 1 mcl9k 9216 258 0 258 44 44 0 1 0 8 0 mcl8k 8192 750 0 750 38 37 1 1 0 8 1 mcl4k 4096 1774 0 1774 30 29 1 1 0 8 1 mcl2k2 2112 77 0 77 37 37 0 1 0 8 0 mcl2k 2048 105156 0 105076 62 51 11 19 0 8 0 mtagpl 96 1442 0 1222 27 21 6 8 0 8 0 mbufpl 256 280978 0 280305 918 870 48 417 0 8 4 bufpl 288 29925 0 23509 459 0 459 459 0 8 0 anonpl 24 4798119 0 4780931 246 133 113 133 0 188 1 amapchunkpl 152 567829 0 567220 702 674 28 654 0 158 1 amappl16 200 44311 0 43687 137 102 35 46 0 8 1 amappl15 192 2589 0 2589 2 1 1 1 0 8 1 amappl14 184 413 0 407 2 1 1 1 0 8 0 amappl13 176 1442 0 1441 1 0 1 1 0 8 0 amappl12 168 3281 0 3276 1 0 1 1 0 8 0 amappl11 160 4083 0 4072 1 0 1 1 0 8 0 amappl10 152 258 0 252 1 0 1 1 0 8 0 amappl9 144 1434 0 1431 1 0 1 1 0 8 0 amappl8 136 5959 0 5869 4 0 4 4 0 8 0 amappl7 128 5191 0 5177 1 0 1 1 0 8 0 amappl6 120 1478 0 1460 1 0 1 1 0 8 0 amappl5 112 11755 0 11739 1 0 1 1 0 8 0 amappl4 104 8765 0 8733 1 0 1 1 0 8 0 amappl3 96 4720 0 4704 1 0 1 1 0 8 0 amappl2 88 5285 0 5241 2 0 2 2 0 8 0 amappl1 80 317245 0 316796 30 19 11 12 0 8 0 amappl 88 217734 0 217540 10 4 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 18340 0 18257 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 18340 0 18257 1 0 1 1 0 8 0 vmmpekpl 168 110734 0 110698 3 0 3 3 0 8 0 vmmpepl 168 1620635 0 1618528 387 279 108 160 0 357 0 vmsppl 272 18339 0 18257 7 1 6 6 0 8 0 rwobjpl 24 369355 0 361968 51 5 46 47 0 8 0 pdppl 4096 36686 0 36578 193 81 112 114 0 8 4 pvpl 32 7862971 0 7842138 440 253 187 242 0 265 7 pmappl 216 18339 0 18257 5 0 5 5 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 3262 0 2122 51 11 40 43 0 8 4 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd806e520a90,fffffd806e520ba8,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e520a90,fffffd806e520ba8,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e520a90,0,ffff80002167b970,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff80002167b8c0) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8076c8e340,ffff80002167b970,3,fffffd807f7d8a20) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021667270,fffffd8076c8e340,fffffd807f7d8a20,ffff80002167ba38,ffff80002167ba10) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrsysret(ffff800021667270,57,0,ffff80002167bb50) at ktrsysret+0x17d ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrsysret(ffff800021667270,57,0,ffff80002167bb50) at ktrsysret+0x17d sys/kern/kern_ktrace.c:213 syscall(ffff80002167bbc0) at syscall+0x561 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff80002167bbc0) at syscall+0x561 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5570, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd806e520a90,fffffd806e520ba8,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e520a90,fffffd806e520ba8,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806e520a90,0,ffff80002167b970,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff80002167b8c0) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8076c8e340,ffff80002167b970,3,fffffd807f7d8a20) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021667270,fffffd8076c8e340,fffffd807f7d8a20,ffff80002167ba38,ffff80002167ba10) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrsysret(ffff800021667270,57,0,ffff80002167bb50) at ktrsysret+0x17d ktrwrite2 sys/kern/kern_ktrace.c:631 [inline] ktrsysret(ffff800021667270,57,0,ffff80002167bb50) at ktrsysret+0x17d sys/kern/kern_ktrace.c:213 syscall(ffff80002167bbc0) at syscall+0x561 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff80002167bbc0) at syscall+0x561 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe5570, count: -8