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(fffffd8068501020,fffffd8068501138,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8068501020,fffffd8068501138,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8068501020,0,ffff80002169ce00,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff80002169cd50) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8076560958,ffff80002169ce00,3,fffffd807f7d78a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002610aa90,fffffd8076560958,fffffd807f7d78a0,ffff80002169cec8,ffff80002169cea0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff80002610aa90,f8,1,ffff800000cd3280,c) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff80002610aa90,f8,1,ffff800000cd3280,c) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff80002610aa90,f8,ffff80002169d048,0,ffff80002169d140) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff80002610aa90,ffff80002169d0e0,ffff80002169d140) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff80002169d1b0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae30, count: -10 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002169cc10 rbx 0xfffffd8068501138 rdx 0 rcx 0xffff80002610aa94 rax 0x28273b161bb82a4c r8 0 r9 0 r10 0x7a08ab0845726990 r11 0x88ce792c67863dcd r12 0xfffffd8068501001 r13 0x1 r14 0xfffffd8068501188 r15 0xfffffd8068501020 rip 0xffffffff81c14e6a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002169cbb0 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (syz-executor.1) pid=189412 stat=onproc flags process=2 proc=1 pri=24, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800029949508,0xffff8000216a8010 process=0xffff8000230bf3b0 user=0xffff800021698000, vmspace=0xfffffd80746a4780 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 7490 9608 19046 0 2 0 syz-executor.2 7490 254313 19046 0 3 0x4000080 fsleep syz-executor.2 81225 284619 82983 0 3 0x80 nanoslp syz-executor.0 81225 3834 82983 0 3 0x4000080 netio syz-executor.0 81225 522980 82983 0 3 0x4000080 fsleep syz-executor.0 99200 430480 70353 0 3 0x82 nanoslp syz-executor.5 24509 364645 0 0 3 0x14200 acct acct 7994 320745 70353 0 3 0x82 piperd syz-executor.4 *78806 189412 70353 0 7 0x3 syz-executor.1 36850 520402 70353 0 3 0x82 piperd syz-executor.6 77657 366708 1 0 3 0x100083 ttyin getty 19046 221997 70353 0 3 0x82 nanoslp syz-executor.2 96810 234058 70353 0 3 0x82 piperd syz-executor.3 82983 450334 70353 0 3 0x82 nanoslp syz-executor.0 46649 186335 0 0 3 0x14280 nfsidl nfsio 19098 314745 0 0 3 0x14280 nfsidl nfsio 54415 153660 0 0 3 0x14280 nfsidl nfsio 8908 22567 0 0 3 0x14280 nfsidl nfsio 13085 85670 0 0 3 0x14280 nfsidl nfsio 77582 185385 0 0 3 0x14280 nfsidl nfsio 98303 213984 0 0 3 0x14280 nfsidl nfsio 39471 348097 0 0 3 0x14280 nfsidl nfsio 42495 246324 0 0 3 0x14280 nfsidl nfsio 58891 157686 0 0 3 0x14280 nfsidl nfsio 35125 113954 0 0 3 0x14280 nfsidl nfsio 76365 332102 0 0 3 0x14280 nfsidl nfsio 61903 76275 0 0 3 0x14280 nfsidl nfsio 81682 342913 0 0 3 0x14280 nfsidl nfsio 24739 280858 0 0 3 0x14280 nfsidl nfsio 82337 498578 0 0 3 0x14280 nfsidl nfsio 29469 395095 0 0 3 0x14280 nfsidl nfsio 13115 270572 0 0 3 0x14280 nfsidl nfsio 8157 520365 0 0 3 0x14280 nfsidl nfsio 93212 279118 0 0 3 0x14280 nfsidl nfsio 47019 453994 0 0 3 0x14200 bored sosplice 28862 367071 70353 0 3 0x82 piperd syz-executor.7 70353 444802 83060 0 3 0x82 thrsleep syz-fuzzer 70353 408728 83060 0 3 0x4000082 thrsleep syz-fuzzer 70353 345756 83060 0 3 0x4000082 thrsleep syz-fuzzer 70353 514130 83060 0 3 0x4000082 thrsleep syz-fuzzer 70353 327692 83060 0 3 0x4000082 thrsleep syz-fuzzer 70353 28213 83060 0 3 0x4000082 thrsleep syz-fuzzer 70353 60893 83060 0 2 0x4000083 syz-fuzzer 70353 160026 83060 0 3 0x4000082 thrsleep syz-fuzzer 83060 21794 656 0 3 0x10008a sigsusp ksh 656 372568 88321 0 3 0x9a kqread sshd 88321 219709 1 0 3 0x88 kqread sshd 52059 364090 55927 73 3 0x1100090 kqread syslogd 55927 162586 1 0 3 0x100082 netio syslogd 64230 103472 1 0 3 0x100080 kqread resolvd 2820 331815 65354 77 3 0x100092 kqread dhcpleased 23587 336420 65354 77 3 0x100092 kqread dhcpleased 65354 413313 1 0 3 0x80 kqread dhcpleased 70146 50292 0 0 3 0x14200 bored smr 57925 431125 0 0 2 0x14200 zerothread 68301 494091 0 0 3 0x14200 aiodoned aiodoned 97145 404672 0 0 3 0x14200 syncer update 82432 86599 0 0 3 0x14200 cleaner cleaner 21773 288069 0 0 3 0x14200 reaper reaper 50237 240159 0 0 3 0x14200 pgdaemon pagedaemon 53526 465234 0 0 3 0x14200 bored viomb 52358 138804 0 0 3 0x40014200 acpi0 acpi0 24820 229505 0 0 3 0x14200 bored softnet 74484 488113 0 0 3 0x14200 bored systqmp 78734 401974 0 0 3 0x14200 bored systq 33593 69509 0 0 3 0x40014200 bored softclock 81875 173491 0 0 3 0x40014200 idle0 1 148476 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 10196 6427K 7072K 78643K 21355 0 pcb 13 16K 18K 78643K 822 0 rtable 263 19K 21K 78643K 3289 0 ifaddr 100 21K 22K 78643K 1087 0 sysctl 2 0K 0K 78643K 4 0 counters 28 17K 17K 78643K 87 0 ioctlops 0 0K 8K 78643K 1894 0 iov 0 0K 24K 78643K 1336 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1368 85K 86K 78643K 5895 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 67 0 VM map 2 0K 0K 78643K 2 0 sem 14 2K 2K 78643K 23 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 89K 78643K 8363 0 sigio 0 0K 0K 78643K 58 0 proc 63 59K 83K 78643K 1443 0 subproc 104 6K 6K 78643K 390 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 576 0 in_multi 96 6K 6K 78643K 502 0 ether_multi 1 0K 0K 78643K 72 0 mrt 3 0K 0K 78643K 58 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 187 837K 837K 78643K 187 0 exec 0 0K 2K 78643K 2273 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 369 720K 1212K 78643K 48954 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 262 0 NDP 14 0K 2K 78643K 138 0 temp 151 4742K 4822K 78643K 57906 0 kqueue 12 18K 26K 78643K 571 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 120 910 0 907 17 16 1 5 0 8 0 rtentry 112 457 0 354 4 1 3 4 0 8 0 unpcb 136 6546 0 6531 59 58 1 9 0 8 0 syncache 296 38 0 38 10 10 0 1 0 8 0 tcpqe 32 36 49 36 3 3 0 1 0 8 0 tcpcb 736 1791 0 1780 44 41 3 8 0 8 0 arp 88 74 0 56 1 0 1 1 0 8 0 ipq 40 6 0 6 3 3 0 1 0 8 0 ipqe 40 20 0 20 3 3 0 1 0 8 0 inpcb 312 5860 0 5848 76 70 6 12 0 8 2 nd6 48 100 0 75 1 0 1 1 0 8 0 pkpcb 40 31 0 31 5 5 0 1 0 8 0 kcovpl 48 30 0 22 1 0 1 1 0 8 0 ppxss 1152 15 0 15 5 5 0 1 0 8 0 pfstscr 40 41 0 40 1 0 1 1 0 8 0 pffrag 232 16 0 12 1 0 1 1 0 482 0 pffrnode 88 16 0 12 1 0 1 1 0 8 0 pffrent 40 42 0 38 1 0 1 1 0 8 0 pfosfp 40 2 0 1 1 0 1 1 0 8 0 pfosfpen 112 2 0 0 1 0 1 1 0 8 0 pfrke_plain 168 4 0 2 1 0 1 1 0 8 0 pfrktable 1344 838 0 823 5 3 2 2 0 8 0 pftag 88 7 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 76 0 74 1 0 1 1 0 8 0 pfstate 336 38 0 37 1 0 1 1 0 8 0 pfrule 1360 433 0 379 6 1 5 5 0 8 0 rttmrq 48 52 0 48 1 0 1 1 0 8 0 rttmr 72 12 0 12 3 3 0 1 0 8 0 art_heap8 4096 3 0 2 3 2 1 2 0 8 0 art_heap4 256 1834 0 1408 38 11 27 30 0 8 0 art_table 32 1837 0 1410 4 0 4 4 0 8 0 art_node 16 453 0 363 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semapl 112 12 0 0 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 16158 0 14694 92 0 92 92 0 8 0 ffsino 240 16158 0 14694 87 0 87 87 0 8 0 nchpl 144 27957 0 26324 63 0 63 63 0 8 0 rtmask 32 8 0 6 1 0 1 1 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 105817 0 105817 4 3 1 2 0 8 1 vcpupl 1984 109 0 0 14 0 14 14 0 8 0 vmpool 528 123 0 14 9 1 8 8 0 8 0 pfiaddrpl 120 265 0 243 2 1 1 1 0 8 0 kstatmem 264 146 0 118 3 0 3 3 0 8 0 scsiplug 72 10 0 10 3 3 0 1 0 8 0 scxspl 216 77604 0 77604 19 18 1 8 0 8 1 plimitpl 152 1040 0 1026 1 0 1 1 0 8 0 sigapl 424 8628 0 8569 8 0 8 8 0 8 0 futexpl 64 88772 0 88770 1 0 1 1 0 8 0 knotepl 120 92307 0 92227 43 39 4 10 0 8 0 kqueuepl 184 2556 0 2548 33 32 1 4 0 8 0 pipepl 304 1651 0 1623 32 29 3 8 0 8 0 fdescpl 432 8591 0 8568 4 0 4 4 0 8 0 filepl 120 68538 0 68300 77 67 10 16 0 8 2 lockfpl 104 2257 0 2255 6 5 1 2 0 8 0 lockfspl 48 505 0 503 1 0 1 1 0 8 0 sessionpl 144 47 0 31 1 0 1 1 0 8 0 pgrppl 48 57 0 41 1 0 1 1 0 8 0 ucredpl 96 7839 0 7828 1 0 1 1 0 8 0 zombiepl 144 8570 0 8569 1 0 1 1 0 8 0 processpl 1000 8628 0 8569 11 2 9 9 0 8 0 procpl 672 22384 0 22315 21 13 8 9 0 8 0 sosppl 168 90 0 90 8 8 0 1 0 8 0 sockpl 448 13351 0 13321 258 247 11 30 0 8 6 pool(sockpl): free list modified: page 0xfffffd8068501000; item ordinal 0; addr 0xfffffd8068501020 (p 0xfffffd80788c7000); offset 0x10=0xdeaf9ead mcl64k 65536 244 0 244 13 12 1 1 0 8 1 mcl16k 16384 149 0 149 14 14 0 1 0 8 0 mcl12k 12288 276 0 276 9 8 1 1 0 8 1 mcl9k 9216 160 0 160 17 16 1 1 0 8 1 mcl8k 8192 776 0 776 5 4 1 1 0 8 1 mcl4k 4096 1382 0 1382 1 0 1 1 0 8 1 mcl2k2 2112 90 0 90 11 10 1 1 0 8 1 mcl2k 2048 91563 0 91508 31 21 10 17 0 8 0 mtagpl 96 1554 0 1392 18 13 5 11 0 8 0 mbufpl 256 230821 0 230485 1755 1728 27 577 0 8 3 bufpl 288 21656 0 15252 458 0 458 458 0 8 0 anonpl 24 1616277 0 1600603 179 63 116 137 0 188 0 amapchunkpl 152 749646 0 749095 1732 1667 65 656 0 158 40 amappl16 200 22395 0 21703 101 63 38 59 0 8 0 amappl15 192 1215 0 1211 1 0 1 1 0 8 0 amappl14 184 649 0 645 1 0 1 1 0 8 0 amappl13 176 596 0 592 1 0 1 1 0 8 0 amappl12 168 1328 0 1324 2 1 1 1 0 8 0 amappl11 160 1012 0 998 1 0 1 1 0 8 0 amappl10 152 1172 0 1169 1 0 1 1 0 8 0 amappl9 144 1923 0 1915 1 0 1 1 0 8 0 amappl8 136 2409 0 2327 3 0 3 3 0 8 0 amappl7 128 1493 0 1483 1 0 1 1 0 8 0 amappl6 120 1785 0 1766 2 1 1 2 0 8 0 amappl5 112 7396 0 7382 1 0 1 1 0 8 0 amappl4 104 3436 0 3407 2 0 2 2 0 8 0 amappl3 96 25863 0 25822 2 0 2 2 0 8 0 amappl2 88 10482 0 10424 3 1 2 3 0 8 0 amappl1 80 201948 0 201406 25 10 15 19 0 8 0 amappl 88 46279 0 46100 6 1 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 8714 0 8582 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8714 0 8582 1 0 1 1 0 8 0 vmmpekpl 168 61935 0 61862 4 0 4 4 0 8 0 vmmpepl 168 844162 0 841672 242 103 139 156 0 357 5 vmsppl 272 8713 0 8582 11 1 10 10 0 8 0 rwobjpl 24 202790 0 195080 49 1 48 49 0 8 0 pdppl 4096 17434 0 17273 537 368 169 173 0 8 8 pvpl 32 3147552 0 3127881 357 171 186 239 0 265 1 pmappl 216 8713 0 8582 8 0 8 8 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 3440 0 2525 48 18 30 40 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd8068501020,fffffd8068501138,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8068501020,fffffd8068501138,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8068501020,0,ffff80002169ce00,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff80002169cd50) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8076560958,ffff80002169ce00,3,fffffd807f7d78a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002610aa90,fffffd8076560958,fffffd807f7d78a0,ffff80002169cec8,ffff80002169cea0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff80002610aa90,f8,1,ffff800000cd3280,c) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff80002610aa90,f8,1,ffff800000cd3280,c) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff80002610aa90,f8,ffff80002169d048,0,ffff80002169d140) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff80002610aa90,ffff80002169d0e0,ffff80002169d140) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff80002169d1b0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae30, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd8068501020,fffffd8068501138,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8068501020,fffffd8068501138,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8068501020,0,ffff80002169ce00,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff80002169cd50) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8076560958,ffff80002169ce00,3,fffffd807f7d78a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002610aa90,fffffd8076560958,fffffd807f7d78a0,ffff80002169cec8,ffff80002169cea0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff80002610aa90,f8,1,ffff800000cd3280,c) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff80002610aa90,f8,1,ffff800000cd3280,c) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff80002610aa90,f8,ffff80002169d048,0,ffff80002169d140) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff80002610aa90,ffff80002169d0e0,ffff80002169d140) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff80002169d1b0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae30, count: -10