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(fffffd806e4c18d0,fffffd806e4c1968,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e4c18d0,fffffd806e4c1968,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 soreceive(fffffd806e4c18d0,0,ffff80002e852ed8,0,0,ffff80002e852dec,8f5cbc276f8f0a28) at soreceive+0x203 sys/kern/uipc_socket.c:766 fifo_read(ffff80002e852e40) at fifo_read+0xcb sys/miscfs/fifofs/fifo_vnops.c:253 VOP_READ(fffffd8074116140,ffff80002e852ed8,64,fffffd807f7d8840) at VOP_READ+0xbf sys/kern/vfs_vops.c:227 vn_rdwr(0,fffffd8074116140,ffff800008943040,1f,0,1,9c8c944aa22b6cc7,ffff8000006b3000,fffffd80643d9820,0) at vn_rdwr+0x105 vndstrategy(fffffd80643d9820) at vndstrategy+0x3b3 sys/dev/vnd.c:342 physio(ffffffff81ee3860,2902,8000,ffffffff81cf5cf0,ffff80002e8533c8) at physio+0x289 sys/kern/kern_physio.c:163 spec_read(ffff80002e8531a0) at spec_read+0xec sys/kern/spec_vnops.c:222 VOP_READ(fffffd80632a7188,ffff80002e8533c8,0,fffffd807f7d8900) at VOP_READ+0xbf sys/kern/vfs_vops.c:227 vn_read(fffffd8067238170,ffff80002e8533c8,1) at vn_read+0x121 sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000216aad20,3,ffff80002e8533c8,1,ffff80002e8534d0) at dofilereadv+0x19e sys/kern/sys_generic.c:253 sys_pad_preadv(ffff8000216aad20,ffff80002e853478,ffff80002e8534d0) at sys_pad_preadv+0xb9 sys_preadv sys/kern/vfs_syscalls.c:3324 [inline] sys_pad_preadv(ffff8000216aad20,ffff80002e853478,ffff80002e8534d0) at sys_pad_preadv+0xb9 sys/kern/vfs_syscalls.c:3414 syscall(ffff80002e853540) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74eafd11500, count: -14 ddb> show registers rdi 0 rsi 0x40 rbp 0xffff80002e852cc0 rbx 0x1 rdx 0xffff800000d16540 rcx 0x26d9 __ALIGN_SIZE+0x16d9 rax 0x13df4a0bdc4eaf9 r8 0x400 r9 0 r10 0x84f2b25f71960f1a r11 0x7e357cb6aac9b60a r12 0 r13 0x1 r14 0xfffffd806e4c19b8 r15 0xfffffd806e4c18d0 rip 0xffffffff824727aa sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e852c60 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (syz-executor.1) pid=16114 stat=onproc flags process=0 proc=4000000 pri=24, usrpri=57, nice=20 forw=0xffffffffffffffff, list=0xffff8000216aaa80,0xffff8000216aafd0 process=0xffff800027f5ac00 user=0xffff80002e84e000, vmspace=0xfffffd80641ab340 estcpu=16, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 50820 64928 23161 0 2 0 syz-executor.5 50820 85383 23161 0 2 0x4000000 syz-executor.5 16307 119461 72171 0 3 0x80 nanoslp syz-executor.1 *16307 16114 72171 0 7 0x4000000 syz-executor.1 89815 40766 25907 0 3 0x82 nanoslp syz-executor.6 72171 432631 25907 0 3 0x82 nanoslp syz-executor.1 13533 124326 25907 0 2 0x2 syz-executor.4 23161 273487 25907 0 3 0x82 nanoslp syz-executor.5 81529 199448 25907 0 2 0x2 syz-executor.2 95000 374660 25907 0 3 0x82 nanoslp syz-executor.3 75091 436803 1 0 3 0x100083 ttyin getty 35246 277995 0 0 3 0x14280 nfsidl nfsio 88040 133384 0 0 3 0x14280 nfsidl nfsio 56915 382708 0 0 3 0x14280 nfsidl nfsio 87632 407409 0 0 3 0x14280 nfsidl nfsio 41379 290780 0 0 3 0x14280 nfsidl nfsio 6665 145200 0 0 3 0x14280 nfsidl nfsio 81377 301598 25907 0 3 0x82 nanoslp syz-executor.0 6448 435665 25907 0 2 0x2 syz-executor.7 9280 139847 0 0 3 0x14200 bored sosplice 22916 119533 0 0 3 0x14200 acct acct 25907 104563 58705 0 3 0x82 thrsleep syz-fuzzer 25907 126477 58705 0 3 0x4000082 nanoslp syz-fuzzer 25907 437133 58705 0 3 0x4000082 thrsleep syz-fuzzer 25907 438769 58705 0 3 0x4000082 thrsleep syz-fuzzer 25907 182791 58705 0 3 0x4000082 kqread syz-fuzzer 25907 263653 58705 0 3 0x4000082 thrsleep syz-fuzzer 25907 375921 58705 0 3 0x4000082 thrsleep syz-fuzzer 25907 111669 58705 0 3 0x4000082 thrsleep syz-fuzzer 58705 348623 2146 0 3 0x10008a sigsusp ksh 2146 56048 53996 0 3 0x9a kqread sshd 53996 294692 1 0 3 0x88 kqread sshd 9566 278072 17477 73 3 0x1100090 kqread syslogd 17477 18130 1 0 3 0x100082 netio syslogd 83148 124353 1 0 3 0x100080 kqread resolvd 98866 343562 18054 77 3 0x100092 kqread dhcpleased 52847 277467 18054 77 3 0x100092 kqread dhcpleased 18054 289238 1 0 3 0x80 kqread dhcpleased 30839 123188 0 0 3 0x14200 bored smr 7946 112220 0 0 2 0x14200 zerothread 86123 370153 0 0 3 0x14200 aiodoned aiodoned 9490 205266 0 0 3 0x14200 syncer update 83112 266106 0 0 3 0x14200 cleaner cleaner 69771 150925 0 0 3 0x14200 reaper reaper 58736 414315 0 0 3 0x14200 pgdaemon pagedaemon 97630 453563 0 0 3 0x14200 bored viomb 84039 346984 0 0 3 0x40014200 acpi0 acpi0 60945 2771 0 0 3 0x14200 bored softnet 48972 85225 0 0 3 0x14200 bored systqmp 86513 447416 0 0 3 0x14200 bored systq 94419 101180 0 0 3 0x40014200 bored softclock 7016 522787 0 0 3 0x40014200 idle0 1 7963 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 10197 6444K 7274K 78643K 26438 0 pcb 13 18K 23K 78643K 1953 0 rtable 188 14K 21K 78643K 3871 0 ifaddr 85 21K 22K 78643K 1261 0 sysctl 3 1K 1K 78643K 3 0 counters 27 17K 17K 78643K 154 0 ioctlops 0 0K 4K 78643K 6725 0 iov 0 0K 28K 78643K 1903 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1482 93K 93K 78643K 5759 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 70 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 625 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 89K 78643K 10400 0 sigio 0 0K 0K 78643K 601 0 proc 62 55K 79K 78643K 1986 0 subproc 104 6K 7K 78643K 602 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 548 0 in_multi 65 4K 7K 78643K 785 0 ether_multi 1 0K 0K 78643K 103 0 mrt 1 0K 0K 78643K 81 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 199 890K 890K 78643K 199 0 exec 0 0K 2K 78643K 3239 0 pfkey data 0 0K 0K 78643K 3 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 487 842K 1416K 78643K 127760 0 UVM aobj 131 8K 8K 78643K 148 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 565 0 NDP 12 0K 2K 78643K 238 0 temp 157 4751K 4953K 78643K 103561 0 kqueue 12 18K 27K 78643K 579 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 120 708 0 705 10 9 1 3 0 8 0 rtentry 112 619 0 538 4 1 3 4 0 8 0 unpcb 136 6110 0 6097 104 103 1 9 0 8 0 syncache 296 47 0 47 16 16 0 1 0 8 0 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 76 0 76 8 8 0 1 0 8 0 tcpcb 736 3107 0 3103 175 174 1 17 0 8 0 arp 88 100 0 83 1 0 1 1 0 8 0 ipq 40 4 0 4 3 3 0 1 0 8 0 ipqe 40 46 0 46 3 3 0 1 0 8 0 inpcb 304 10123 0 10113 248 246 2 14 0 8 0 rttmr 72 15 0 15 6 6 0 1 0 8 0 ip6q 72 6 0 6 2 2 0 1 0 8 0 ip6af 40 10 0 10 2 2 0 1 0 8 0 nd6 48 159 0 141 1 0 1 1 0 8 0 pkpcb 40 15 0 15 4 4 0 1 0 8 0 kcovpl 48 46 0 38 1 0 1 1 0 8 0 ppxss 1152 37 0 37 12 12 0 1 0 8 0 pfstscr 40 57 0 54 1 0 1 1 0 8 0 pfrktable 1344 720 0 720 10 10 0 2 0 8 0 pftag 88 25 0 21 1 0 1 1 0 8 0 pfstitem 24 45 0 41 1 0 1 1 0 8 0 pfstkey 112 82 0 78 1 0 1 1 0 8 0 pfstate 320 43 0 41 1 0 1 1 0 8 0 pfrule 1360 554 0 550 6 5 1 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2491 0 2172 45 23 22 31 0 8 0 art_table 32 2492 0 2172 4 0 4 4 0 8 0 art_node 16 608 0 537 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 3 1 0 1 1 0 8 0 semupl 112 6 0 6 2 2 0 1 0 8 0 semapl 112 623 0 613 1 0 1 1 0 8 0 shmpl 112 145 0 17 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15038 0 13548 94 0 94 94 0 8 0 ffsino 240 15038 0 13548 88 0 88 88 0 8 0 nchpl 144 29067 0 27452 63 1 62 63 0 8 0 uvmvnodes 80 5979 0 0 123 0 123 123 0 8 0 vnodes 224 5979 0 0 352 0 352 352 0 8 0 namei 1024 133677 0 133675 5 4 1 2 0 8 0 vcpupl 1984 125 0 0 16 0 16 16 0 8 0 vmpool 528 339 0 214 11 2 9 9 0 8 0 pfiaddrpl 120 216 0 216 6 6 0 1 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 100740 0 100740 37 36 1 8 0 8 1 plimitpl 152 1489 0 1475 1 0 1 1 0 8 0 sigapl 424 10643 0 10596 9 3 6 8 0 8 0 futexpl 64 106009 0 106009 10 9 1 1 0 8 1 knotepl 120 92801 0 92721 25 22 3 10 0 8 0 kqueuepl 184 2537 0 2529 57 56 1 6 0 8 0 pipepl 304 2677 0 2649 75 71 4 10 0 8 0 fdescpl 432 10602 0 10578 4 0 4 4 0 8 0 filepl 120 93730 0 93489 211 202 9 18 0 8 0 lockfpl 104 3849 0 3847 10 9 1 2 0 8 0 lockfspl 48 805 0 803 1 0 1 1 0 8 0 sessionpl 144 65 0 49 1 0 1 1 0 8 0 pgrppl 48 91 0 75 1 0 1 1 0 8 0 ucredpl 96 27571 0 27558 1 0 1 1 0 8 0 zombiepl 144 10599 0 10596 2 1 1 1 0 8 0 processpl 1000 10643 0 10596 10 3 7 9 0 8 0 procpl 672 27047 0 26991 29 22 7 8 0 8 0 sosppl 168 83 0 83 16 15 1 1 0 8 1 sockpl 448 17042 0 17018 514 510 4 33 0 8 0 mcl64k 65536 631 0 631 59 59 0 1 0 8 0 mcl16k 16384 120 0 120 37 37 0 1 0 8 0 mcl12k 12288 325 0 325 62 62 0 1 0 8 0 mcl9k 9216 233 0 233 47 47 0 1 0 8 0 mcl8k 8192 801 0 801 24 24 0 1 0 8 0 mcl4k 4096 1425 0 1425 28 27 1 1 0 8 1 mcl2k2 2112 69 0 69 40 40 0 1 0 8 0 mcl2k 2048 96415 0 96366 50 42 8 16 0 8 0 mtagpl 96 1956 0 1747 19 12 7 14 0 8 0 mbufpl 256 235854 0 235429 216 181 35 132 0 8 0 bufpl 288 25041 0 18632 459 0 459 459 0 8 0 anonpl 24 3044949 0 3023068 528 382 146 207 0 188 0 amapchunkpl 152 361871 0 361053 615 577 38 352 0 158 0 amappl16 200 31820 0 30908 216 166 50 62 0 8 0 amappl15 192 1674 0 1668 1 0 1 1 0 8 0 amappl14 184 82 0 79 1 0 1 1 0 8 0 amappl13 176 2574 0 2568 1 0 1 1 0 8 0 amappl12 168 2437 0 2434 2 1 1 1 0 8 0 amappl11 160 1765 0 1752 1 0 1 1 0 8 0 amappl10 152 862 0 857 1 0 1 1 0 8 0 amappl9 144 1180 0 1175 1 0 1 1 0 8 0 amappl8 136 2013 0 1901 5 1 4 4 0 8 0 amappl7 128 701 0 692 1 0 1 1 0 8 0 amappl6 120 1037 0 1013 2 1 1 2 0 8 0 amappl5 112 7987 0 7977 1 0 1 1 0 8 0 amappl4 104 4959 0 4921 4 2 2 2 0 8 0 amappl3 96 4311 0 4294 1 0 1 1 0 8 0 amappl2 88 4625 0 4550 3 1 2 3 0 8 0 amappl1 80 190107 0 189601 20 7 13 18 0 8 0 amappl 88 126256 0 125990 8 0 8 8 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 72 147 0 17 3 0 3 3 0 8 0 uaddrrnd 24 10941 0 10792 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10941 0 10792 1 0 1 1 0 8 0 vmmpekpl 168 78380 0 78310 4 0 4 4 0 8 0 vmmpepl 168 975542 0 972650 616 467 149 167 0 357 0 vmsppl 272 10940 0 10792 15 4 11 11 0 8 0 rwobjpl 24 235217 0 227179 52 2 50 51 0 8 0 pdppl 4096 21888 0 21709 1171 982 189 191 0 8 10 pvpl 32 5185791 0 5163447 818 610 208 329 0 265 0 pmappl 216 10940 0 10792 9 0 9 9 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2993 0 2074 30 0 30 30 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd806e4c18d0,fffffd806e4c1968,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e4c18d0,fffffd806e4c1968,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 soreceive(fffffd806e4c18d0,0,ffff80002e852ed8,0,0,ffff80002e852dec,8f5cbc276f8f0a28) at soreceive+0x203 sys/kern/uipc_socket.c:766 fifo_read(ffff80002e852e40) at fifo_read+0xcb sys/miscfs/fifofs/fifo_vnops.c:253 VOP_READ(fffffd8074116140,ffff80002e852ed8,64,fffffd807f7d8840) at VOP_READ+0xbf sys/kern/vfs_vops.c:227 vn_rdwr(0,fffffd8074116140,ffff800008943040,1f,0,1,9c8c944aa22b6cc7,ffff8000006b3000,fffffd80643d9820,0) at vn_rdwr+0x105 vndstrategy(fffffd80643d9820) at vndstrategy+0x3b3 sys/dev/vnd.c:342 physio(ffffffff81ee3860,2902,8000,ffffffff81cf5cf0,ffff80002e8533c8) at physio+0x289 sys/kern/kern_physio.c:163 spec_read(ffff80002e8531a0) at spec_read+0xec sys/kern/spec_vnops.c:222 VOP_READ(fffffd80632a7188,ffff80002e8533c8,0,fffffd807f7d8900) at VOP_READ+0xbf sys/kern/vfs_vops.c:227 vn_read(fffffd8067238170,ffff80002e8533c8,1) at vn_read+0x121 sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000216aad20,3,ffff80002e8533c8,1,ffff80002e8534d0) at dofilereadv+0x19e sys/kern/sys_generic.c:253 sys_pad_preadv(ffff8000216aad20,ffff80002e853478,ffff80002e8534d0) at sys_pad_preadv+0xb9 sys_preadv sys/kern/vfs_syscalls.c:3324 [inline] sys_pad_preadv(ffff8000216aad20,ffff80002e853478,ffff80002e8534d0) at sys_pad_preadv+0xb9 sys/kern/vfs_syscalls.c:3414 syscall(ffff80002e853540) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74eafd11500, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd806e4c18d0,fffffd806e4c1968,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd806e4c18d0,fffffd806e4c1968,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 soreceive(fffffd806e4c18d0,0,ffff80002e852ed8,0,0,ffff80002e852dec,8f5cbc276f8f0a28) at soreceive+0x203 sys/kern/uipc_socket.c:766 fifo_read(ffff80002e852e40) at fifo_read+0xcb sys/miscfs/fifofs/fifo_vnops.c:253 VOP_READ(fffffd8074116140,ffff80002e852ed8,64,fffffd807f7d8840) at VOP_READ+0xbf sys/kern/vfs_vops.c:227 vn_rdwr(0,fffffd8074116140,ffff800008943040,1f,0,1,9c8c944aa22b6cc7,ffff8000006b3000,fffffd80643d9820,0) at vn_rdwr+0x105 vndstrategy(fffffd80643d9820) at vndstrategy+0x3b3 sys/dev/vnd.c:342 physio(ffffffff81ee3860,2902,8000,ffffffff81cf5cf0,ffff80002e8533c8) at physio+0x289 sys/kern/kern_physio.c:163 spec_read(ffff80002e8531a0) at spec_read+0xec sys/kern/spec_vnops.c:222 VOP_READ(fffffd80632a7188,ffff80002e8533c8,0,fffffd807f7d8900) at VOP_READ+0xbf sys/kern/vfs_vops.c:227 vn_read(fffffd8067238170,ffff80002e8533c8,1) at vn_read+0x121 sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000216aad20,3,ffff80002e8533c8,1,ffff80002e8534d0) at dofilereadv+0x19e sys/kern/sys_generic.c:253 sys_pad_preadv(ffff8000216aad20,ffff80002e853478,ffff80002e8534d0) at sys_pad_preadv+0xb9 sys_preadv sys/kern/vfs_syscalls.c:3324 [inline] sys_pad_preadv(ffff8000216aad20,ffff80002e853478,ffff80002e8534d0) at sys_pad_preadv+0xb9 sys/kern/vfs_syscalls.c:3414 syscall(ffff80002e853540) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74eafd11500, count: -14