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(fffffd806f394708,fffffd806f394820,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806f394708,fffffd806f394820,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806f394708,0,ffff800021656f30,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021656e80) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8076a51018,ffff800021656f30,3,fffffd807f7d8720) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff9a48,fffffd8076a51018,fffffd807f7d8720,ffff800021656ff0,ffff800021656fd0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000ffff9a48,1,1,ffff800000c323c0,4623) at ktrgenio+0x26b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000ffff9a48,1,1,ffff800000c323c0,4623) at ktrgenio+0x26b sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000ffff9a48,1,ffff800021657178,0,ffff800021657270) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff8000ffff9a48,ffff800021657210,ffff800021657270) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000216572e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x262b7cc70, count: -10 ddb> show registers rdi 0 rsi 0 rbp 0xffff800021656d40 rbx 0xfffffd806f394820 rdx 0 rcx 0xffff8000ffff9a4c rax 0x1c3c83e2bdfc6423 r8 0 r9 0 r10 0x70d59858b931c3be r11 0xa01ad5d96f842799 r12 0xfffffd806f394701 r13 0x1 r14 0xfffffd806f394870 r15 0xfffffd806f394708 rip 0xffffffff812f229a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021656ce0 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (syz-fuzzer) pid=117692 stat=onproc flags process=2 proc=4000001 pri=24, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8008,0xffff80002160fa60 process=0xffff8000215f03f8 user=0xffff800021652000, vmspace=0xfffffd807f018770 estcpu=9, cpticks=0, pctcpu=0.9 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 74798 162299 47895 0 2 0x83 syz-executor.1 66772 170868 47895 0 2 0x83 syz-executor.0 35318 18128 47895 0 2 0x83 syz-executor.7 23853 83901 47895 0 2 0x83 syz-executor.4 76228 89459 47895 0 2 0x83 syz-executor.6 24023 135612 47895 0 2 0x83 syz-executor.3 98179 1765 0 0 3 0x14200 acct acct 9068 425107 0 0 3 0x14280 nfsidl nfsio 11819 379530 0 0 3 0x14280 nfsidl nfsio 2011 296423 0 0 3 0x14280 nfsidl nfsio 18859 502370 0 0 3 0x14280 nfsidl nfsio 32499 165902 0 0 3 0x14280 nfsidl nfsio 77645 384733 0 0 3 0x14280 nfsidl nfsio 33325 92101 0 0 3 0x14280 nfsidl nfsio 50514 112821 0 0 3 0x14280 nfsidl nfsio 80621 45934 0 0 3 0x14280 nfsidl nfsio 74311 168227 0 0 3 0x14280 nfsidl nfsio 43674 418048 0 0 3 0x14280 nfsidl nfsio 73384 72031 0 0 3 0x14280 nfsidl nfsio 30416 481814 0 0 3 0x14280 nfsidl nfsio 83084 454692 0 0 3 0x14280 nfsidl nfsio 54872 464423 0 0 3 0x14280 nfsidl nfsio 69756 60206 0 0 3 0x14280 nfsidl nfsio 89007 480796 0 0 3 0x14280 nfsidl nfsio 96440 370550 0 0 3 0x14280 nfsidl nfsio 16778 342820 0 0 3 0x14280 nfsidl nfsio 4502 297268 0 0 3 0x14280 nfsidl nfsio 16473 253527 0 0 3 0x14200 bored sosplice 66916 330010 47895 0 2 0x83 syz-executor.5 5380 287706 47895 0 2 0x83 syz-executor.2 47895 233559 8097 0 3 0x82 thrsleep syz-fuzzer 47895 122979 8097 0 2 0x4000083 syz-fuzzer *47895 117692 8097 0 7 0x4000003 syz-fuzzer 47895 12645 8097 0 3 0x4000082 thrsleep syz-fuzzer 47895 199596 8097 0 3 0x4000082 thrsleep syz-fuzzer 47895 258047 8097 0 3 0x4000082 thrsleep syz-fuzzer 47895 208076 8097 0 3 0x4000082 thrsleep syz-fuzzer 47895 221448 8097 0 3 0x4000082 thrsleep syz-fuzzer 8097 340979 39782 0 3 0x10008a sigsusp ksh 39782 499006 83859 0 2 0x9b sshd 87699 78426 1 0 3 0x100083 ttyin getty 83859 326012 1 0 3 0x88 kqread sshd 95239 169738 58500 73 3 0x100090 kqread syslogd 58500 388201 1 0 3 0x100082 netio syslogd 18317 13369 1 0 3 0x100080 kqread resolvd 80599 161963 75494 77 3 0x100092 kqread dhcpleased 74967 128601 75494 77 3 0x100092 kqread dhcpleased 75494 477122 1 0 3 0x80 kqread dhcpleased 53837 63189 0 0 3 0x14200 bored smr 34830 486070 0 0 2 0x14200 zerothread 31866 243229 0 0 3 0x14200 aiodoned aiodoned 36930 251960 0 0 3 0x14200 syncer update 25336 504838 0 0 3 0x14200 cleaner cleaner 78201 132436 0 0 3 0x14200 reaper reaper 96757 388147 0 0 3 0x14200 pgdaemon pagedaemon 25089 294167 0 0 3 0x14200 bored viomb 17867 4901 0 0 3 0x40014200 acpi0 acpi0 69064 299326 0 0 3 0x14200 bored softnet 44611 52787 0 0 3 0x14200 bored systqmp 61204 86861 0 0 3 0x14200 bored systq 48303 511970 0 0 3 0x40014200 bored softclock 2560 347865 0 0 3 0x40014200 idle0 1 173417 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 10170 6474K 7067K 78643K 21837 0 pcb 13 16K 18K 78643K 358 0 rtable 208 8K 11K 78643K 1104 0 ifaddr 80 17K 19K 78643K 363 0 sysctl 2 0K 0K 78643K 2 0 counters 26 17K 17K 78643K 71 0 ioctlops 0 0K 4K 78643K 606 0 iov 0 0K 24K 78643K 102 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1466 92K 92K 78643K 3459 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 36 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 134 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 10 33K 81K 78643K 3168 0 sigio 0 0K 0K 78643K 72 0 proc 58 55K 71K 78643K 722 0 subproc 104 6K 6K 78643K 195 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 76 0 in_multi 73 4K 6K 78643K 304 0 ether_multi 1 0K 0K 78643K 27 0 mrt 1 0K 0K 78643K 13 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 945 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 279 231K 233K 78643K 39362 0 UVM aobj 42 5K 5K 78643K 45 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 126 0 NDP 11 0K 2K 78643K 99 0 temp 128 4701K 4777K 78643K 25390 0 kqueue 12 18K 24K 78643K 198 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 98 0 95 1 0 1 1 0 8 0 rtentry 112 369 0 280 4 0 4 4 0 8 0 unpcb 136 2225 0 2212 9 6 3 5 0 8 2 syncache 296 4 0 4 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 10 0 10 1 1 0 1 0 8 0 tcpcb 736 2118 0 2101 55 46 9 20 0 8 7 arp 88 34 0 19 1 0 1 1 0 8 0 ipq 40 10 0 10 2 2 0 1 0 8 0 ipqe 40 25 0 25 2 2 0 1 0 8 0 inpcb 304 4160 0 4153 45 38 7 14 0 8 6 rttmr 72 3 0 3 1 1 0 1 0 8 0 nd6 48 66 0 50 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1152 34 0 34 4 3 1 1 0 8 1 pfstscr 40 4 0 3 1 0 1 1 0 8 0 pfosfp 40 3 0 2 1 0 1 1 0 8 0 pfosfpen 112 3 0 0 1 0 1 1 0 8 0 pfrktable 1344 69 0 66 2 1 1 1 0 8 0 pftag 88 8 0 0 1 0 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 125 0 75 6 1 5 5 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1018 0 650 36 7 29 30 0 8 2 art_table 32 1019 0 650 4 0 4 4 0 8 0 art_node 16 368 0 287 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 0 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 129 0 119 1 0 1 1 0 8 0 shmpl 112 42 0 3 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5053 0 3619 90 0 90 90 0 8 0 ffsino 240 5053 0 3619 85 0 85 85 0 8 0 nchpl 144 8978 0 7349 62 0 62 62 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 29228 0 29227 6 5 1 2 0 8 0 vcpupl 1984 41 0 0 6 0 6 6 0 8 0 vmpool 528 50 0 9 4 1 3 3 0 8 0 pfiaddrpl 120 26 0 25 2 1 1 1 0 8 0 scsiplug 72 7 0 7 2 2 0 1 0 8 0 scxspl 216 33818 0 33818 12 10 2 8 0 8 2 plimitpl 152 241 0 226 1 0 1 1 0 8 0 sigapl 424 3457 0 3401 10 2 8 8 0 8 1 futexpl 64 28997 0 28997 5 4 1 1 0 8 1 knotepl 120 32352 0 32272 4 0 4 4 0 8 1 kqueuepl 184 785 0 777 15 14 1 6 0 8 0 pipepl 304 680 0 652 18 15 3 8 0 8 0 fdescpl 432 3422 0 3401 5 1 4 4 0 8 0 filepl 120 20280 0 20046 35 23 12 15 0 8 4 lockfpl 104 1140 0 1138 1 0 1 1 0 8 0 lockfspl 48 538 0 536 1 0 1 1 0 8 0 sessionpl 144 30 0 14 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 96 1192 0 1182 1 0 1 1 0 8 0 zombiepl 144 3401 0 3394 1 0 1 1 0 8 0 processpl 1000 3457 0 3394 11 2 9 9 0 8 0 procpl 672 7772 0 7702 12 4 8 8 0 8 1 sosppl 168 21 0 21 2 2 0 1 0 8 0 sockpl 448 6490 0 6467 93 82 11 22 0 8 8 pool(sockpl): free list modified: page 0xfffffd806f394000; item ordinal 0; addr 0xfffffd806f394708 (p 0xfffffd806f07c000); offset 0x10=0xdead9eef mcl64k 65536 95 0 95 5 4 1 1 0 8 1 mcl16k 16384 24 0 24 6 5 1 1 0 8 1 mcl12k 12288 71 0 71 6 5 1 1 0 8 1 mcl9k 9216 47 0 47 6 5 1 1 0 8 1 mcl8k 8192 174 0 174 4 3 1 1 0 8 1 mcl4k 4096 288 0 288 7 6 1 1 0 8 1 mcl2k2 2112 19 0 19 6 6 0 1 0 8 0 mcl2k 2048 82308 0 82243 20 10 10 13 0 8 0 mtagpl 96 1328 0 884 16 4 12 14 0 8 0 mbufpl 256 148662 0 148007 86 37 49 80 0 8 0 bufpl 288 8453 0 2045 458 0 458 458 0 8 0 anonpl 24 945582 0 927708 246 70 176 194 0 188 56 amapchunkpl 152 98785 0 98128 78 32 46 63 0 158 12 amappl16 200 9627 0 9022 69 35 34 54 0 8 0 amappl15 192 404 0 399 1 0 1 1 0 8 0 amappl14 184 94 0 91 1 0 1 1 0 8 0 amappl13 176 720 0 717 1 0 1 1 0 8 0 amappl12 168 441 0 439 2 1 1 1 0 8 0 amappl11 160 51 0 40 1 0 1 1 0 8 0 amappl10 152 760 0 753 1 0 1 1 0 8 0 amappl9 144 1174 0 1171 1 0 1 1 0 8 0 amappl8 136 882 0 817 3 0 3 3 0 8 0 amappl7 128 281 0 270 1 0 1 1 0 8 0 amappl6 120 928 0 906 2 1 1 2 0 8 0 amappl5 112 3478 0 3467 1 0 1 1 0 8 0 amappl4 104 1006 0 975 2 0 2 2 0 8 0 amappl3 96 1154 0 1140 1 0 1 1 0 8 0 amappl2 88 1383 0 1337 3 1 2 3 0 8 0 amappl1 80 61147 0 60678 18 5 13 18 0 8 0 amappl 88 38712 0 38531 7 0 7 7 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 44 0 3 1 0 1 1 0 8 0 uaddrrnd 24 3472 0 3410 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3472 0 3410 1 0 1 1 0 8 0 vmmpekpl 168 25211 0 25159 3 0 3 3 0 8 0 vmmpepl 168 308063 0 306012 161 42 119 131 0 357 4 vmsppl 272 3471 0 3410 6 1 5 5 0 8 0 rwobjpl 24 78068 0 70633 46 0 46 46 0 8 0 pdppl 4096 6950 0 6861 268 163 105 105 0 8 16 pvpl 32 1638250 0 1616951 380 86 294 315 0 265 97 pmappl 216 3471 0 3410 4 0 4 4 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1238 0 372 26 0 26 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd806f394708,fffffd806f394820,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806f394708,fffffd806f394820,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806f394708,0,ffff800021656f30,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021656e80) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8076a51018,ffff800021656f30,3,fffffd807f7d8720) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff9a48,fffffd8076a51018,fffffd807f7d8720,ffff800021656ff0,ffff800021656fd0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000ffff9a48,1,1,ffff800000c323c0,4623) at ktrgenio+0x26b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000ffff9a48,1,1,ffff800000c323c0,4623) at ktrgenio+0x26b sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000ffff9a48,1,ffff800021657178,0,ffff800021657270) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff8000ffff9a48,ffff800021657210,ffff800021657270) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000216572e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x262b7cc70, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd806f394708,fffffd806f394820,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806f394708,fffffd806f394820,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd806f394708,0,ffff800021656f30,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff800021656e80) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd8076a51018,ffff800021656f30,3,fffffd807f7d8720) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff9a48,fffffd8076a51018,fffffd807f7d8720,ffff800021656ff0,ffff800021656fd0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000ffff9a48,1,1,ffff800000c323c0,4623) at ktrgenio+0x26b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000ffff9a48,1,1,ffff800000c323c0,4623) at ktrgenio+0x26b sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000ffff9a48,1,ffff800021657178,0,ffff800021657270) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff8000ffff9a48,ffff800021657210,ffff800021657270) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000216572e0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x262b7cc70, count: -10