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(fffffd8068f70200,fffffd8068f70318,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8068f70200,fffffd8068f70318,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8068f70200,0,ffff8000216099c0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff800021609910) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8074374b70,ffff8000216099c0,3,fffffd807f7d78a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021611510,fffffd8074374b70,fffffd807f7d78a0,ffff800021609a88,ffff800021609a60) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff800021611510,4,1,ffff800000c06f70,9bc) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff800021611510,4,1,ffff800000c06f70,9bc) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff800021611510,4,ffff800021609c08,0,ffff800021609d00) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff800021611510,ffff800021609ca0,ffff800021609d00) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff800021609d70) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8720, count: -10 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000216097d0 rbx 0xfffffd8068f70318 rdx 0 rcx 0xffff800021611514 rax 0x1c8d634a9e15cbd r8 0 r9 0 r10 0x1678ebd07e0e962d r11 0x7bcf976ea40d0ee0 r12 0xfffffd8068f70201 r13 0x1 r14 0xfffffd8068f70368 r15 0xfffffd8068f70200 rip 0xffffffff81de9f8a sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021609770 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb> show proc PROC (sshd) pid=174107 stat=onproc flags process=12 proc=1 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021611270,0xffff800021610aa0 process=0xffff8000ffff67e0 user=0xffff800021604000, vmspace=0xfffffd807f015110 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 3292 139250 69896 0 3 0x82 piperd syz-executor.1 70337 185225 69896 0 3 0x82 piperd syz-executor.4 29719 186729 69896 0 2 0x83 syz-executor.0 20523 319012 69896 0 3 0x82 piperd syz-executor.7 98423 470232 0 0 3 0x14280 nfsidl nfsio 99564 442771 0 0 3 0x14280 nfsidl nfsio 20786 137948 0 0 3 0x14280 nfsidl nfsio 38087 346947 0 0 3 0x14280 nfsidl nfsio 28280 83348 0 0 3 0x14280 nfsidl nfsio 62421 80049 0 0 3 0x14280 nfsidl nfsio 88345 249322 1 0 3 0x100083 ttyin getty 8195 268231 69896 0 3 0x82 piperd syz-executor.5 2628 102516 0 0 3 0x14200 bored sosplice 20885 22226 69896 0 3 0x82 piperd syz-executor.2 481 437293 69896 0 3 0x82 nanoslp syz-executor.3 64014 234622 69896 0 3 0x82 piperd syz-executor.6 69896 238297 53440 0 3 0x82 thrsleep syz-fuzzer 69896 408097 53440 0 3 0x4000082 nanoslp syz-fuzzer 69896 83237 53440 0 3 0x4000082 thrsleep syz-fuzzer 69896 408488 53440 0 2 0x4000083 syz-fuzzer 69896 326581 53440 0 2 0x4000083 syz-fuzzer 69896 12292 53440 0 3 0x4000082 kqread syz-fuzzer 69896 128404 53440 0 3 0x4000082 thrsleep syz-fuzzer 69896 285148 53440 0 3 0x4000082 thrsleep syz-fuzzer 69896 173430 53440 0 3 0x4000082 thrsleep syz-fuzzer 53440 66784 46889 0 3 0x10008a sigsusp ksh *46889 174107 7429 0 7 0x13 sshd 7429 425322 1 0 3 0x88 kqread sshd 85736 351197 21069 73 3 0x1100010 ffs_fsync syslogd 21069 398533 1 0 3 0x100082 netio syslogd 75151 410455 1 0 3 0x100080 kqread resolvd 68039 196285 61417 77 3 0x100092 kqread dhcpleased 2899 203974 61417 77 3 0x100092 kqread dhcpleased 61417 493442 1 0 3 0x80 kqread dhcpleased 90759 286485 0 0 3 0x14200 bored smr 59044 18968 0 0 2 0x14200 zerothread 3444 374110 0 0 3 0x14200 aiodoned aiodoned 43461 519827 0 0 3 0x14200 syncer update 18349 355191 0 0 3 0x14200 cleaner cleaner 57972 25632 0 0 3 0x14200 reaper reaper 18632 377215 0 0 3 0x14200 pgdaemon pagedaemon 63679 251230 0 0 3 0x14200 bored viomb 66011 174272 0 0 3 0x40014200 acpi0 acpi0 1453 462642 0 0 3 0x14200 bored softnet 78252 336072 0 0 3 0x14200 bored softnet 8585 336690 0 0 3 0x14200 bored softnet 500 100653 0 0 3 0x14200 bored softnet 2670 478169 0 0 3 0x14200 bored systqmp 41671 4593 0 0 3 0x14200 bored systq 75956 223554 0 0 3 0x40014200 bored softclock 25020 123912 0 0 3 0x40014200 idle0 1 40085 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 10183 6451K 7099K 78643K 17001 0 pcb 13 18K 20K 78643K 308 0 rtable 231 15K 17K 78643K 2135 0 ifaddr 80 17K 19K 78643K 780 0 sysctl 2 0K 0K 78643K 2 0 counters 27 17K 17K 78643K 55 0 ioctlops 0 0K 4K 78643K 722 0 iov 0 0K 32K 78643K 317 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1339 84K 84K 78643K 2627 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 38 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 244 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 10 33K 81K 78643K 2770 0 sigio 0 0K 0K 78643K 141 0 proc 58 59K 83K 78643K 705 0 subproc 104 6K 6K 78643K 182 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 47 0 in_multi 94 6K 7K 78643K 221 0 ether_multi 1 0K 0K 78643K 25 0 mrt 1 0K 0K 78643K 25 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 1130 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 233 163K 755K 78643K 16146 0 UVM aobj 104 4K 4K 78643K 107 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 116 0 NDP 11 0K 1K 78643K 68 0 temp 156 4766K 4830K 78643K 38572 0 kqueue 12 18K 22K 78643K 189 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 120 121 0 118 1 0 1 1 0 8 0 rtentry 112 199 0 95 4 0 4 4 0 8 0 unpcb 136 1553 0 1540 22 17 5 6 0 8 4 syncache 296 16 0 16 5 5 0 1 0 8 0 tcpqe 32 216 0 216 2 2 0 1 0 8 0 tcpcb 736 955 0 951 40 39 1 13 0 8 0 arp 88 34 0 17 1 0 1 1 0 8 0 inpcb 312 6106 0 6093 64 57 7 16 0 8 4 nd6 48 44 0 22 1 0 1 1 0 8 0 pkpcb 40 71 0 71 1 1 0 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 ppxss 1152 16 0 16 3 3 0 1 0 8 0 pfstscr 40 43 0 43 1 1 0 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 4 1 0 1 1 0 8 0 pfosfp 40 9 0 7 1 0 1 1 0 8 0 pfosfpen 112 9 0 6 1 0 1 1 0 8 0 pfrktable 1344 752 0 750 4 3 1 1 0 8 0 pftag 88 8 0 3 1 0 1 1 0 8 0 pfstitem 24 16 0 16 1 1 0 1 0 8 0 pfstkey 112 86 0 86 1 1 0 1 0 8 0 pfstate 336 43 0 43 1 1 0 1 0 8 0 pfrule 1360 171 0 159 4 2 2 2 0 8 1 rttmr 64 9 0 9 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 771 0 333 35 5 30 30 0 8 0 art_table 32 772 0 333 4 0 4 4 0 8 0 art_node 16 198 0 103 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 1 1 0 1 1 0 8 0 semapl 112 242 0 232 1 0 1 1 0 8 0 shmpl 112 104 0 3 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5004 0 3559 91 0 91 91 0 8 0 ffsino 240 5004 0 3559 86 0 86 86 0 8 0 nchpl 144 8754 0 7122 63 0 63 63 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 30973 0 30973 6 5 1 2 0 8 1 vcpupl 1984 6 0 1 1 0 1 1 0 8 0 vmpool 528 15 0 10 3 2 1 1 0 8 0 pfiaddrpl 120 218 0 214 4 3 1 1 0 8 0 kstatmem 264 78 0 56 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 25666 0 25665 17 15 2 8 0 8 1 plimitpl 152 583 0 569 1 0 1 1 0 8 0 sigapl 424 3045 0 3000 6 0 6 6 0 8 0 futexpl 64 29154 0 29154 3 2 1 1 0 8 1 knotepl 120 47360 0 47279 13 8 5 9 0 8 0 kqueuepl 184 606 0 598 12 11 1 4 0 8 0 pipepl 304 481 0 453 11 8 3 8 0 8 0 fdescpl 432 3022 0 3001 4 0 4 4 0 8 0 filepl 120 22555 0 22322 45 33 12 16 0 8 4 lockfpl 104 795 0 793 2 1 1 2 0 8 0 lockfspl 48 248 0 246 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 2485 0 2475 1 0 1 1 0 8 0 zombiepl 144 3001 0 3000 1 0 1 1 0 8 0 processpl 1000 3045 0 3000 9 2 7 7 0 8 0 procpl 672 7212 0 7159 12 5 7 7 0 8 1 sosppl 168 35 0 35 5 5 0 1 0 8 0 sockpl 448 7876 0 7853 153 142 11 33 0 8 8 pool(sockpl): free list modified: page 0xfffffd8068f70000; item ordinal 0; addr 0xfffffd8068f70200 (p 0xfffffd8070705000); offset 0x10=0xdead9eef mcl64k 65536 104 0 104 5 4 1 1 0 8 1 mcl16k 16384 29 0 29 7 6 1 1 0 8 1 mcl12k 12288 92 0 92 7 6 1 1 0 8 1 mcl9k 9216 41 0 41 6 6 0 1 0 8 0 mcl8k 8192 276 0 276 5 4 1 1 0 8 1 mcl4k 4096 251 0 251 5 4 1 1 0 8 1 mcl2k2 2112 23 0 23 8 8 0 1 0 8 0 mcl2k 2048 73198 0 73070 36 18 18 23 0 8 0 mtagpl 96 665 0 283 12 2 10 10 0 8 0 mbufpl 256 135132 0 134525 99 52 47 66 0 8 5 bufpl 288 8581 0 2177 458 0 458 458 0 8 0 anonpl 24 563315 0 547274 146 31 115 123 0 188 6 amapchunkpl 152 95457 0 94931 533 389 144 341 0 158 118 amappl16 200 8100 0 7481 62 27 35 47 0 8 1 amappl15 192 1065 0 1063 1 0 1 1 0 8 0 amappl14 184 503 0 499 1 0 1 1 0 8 0 amappl13 176 339 0 334 1 0 1 1 0 8 0 amappl12 168 454 0 452 2 1 1 1 0 8 0 amappl11 160 403 0 385 1 0 1 1 0 8 0 amappl10 152 141 0 138 1 0 1 1 0 8 0 amappl9 144 646 0 644 1 0 1 1 0 8 0 amappl8 136 847 0 783 3 0 3 3 0 8 0 amappl7 128 303 0 294 1 0 1 1 0 8 0 amappl6 120 372 0 351 2 1 1 2 0 8 0 amappl5 112 1800 0 1789 1 0 1 1 0 8 0 amappl4 104 1605 0 1575 2 0 2 2 0 8 0 amappl3 96 8642 0 8609 2 0 2 2 0 8 0 amappl2 88 4055 0 3997 3 1 2 3 0 8 0 amappl1 80 72042 0 71536 24 10 14 19 0 8 0 amappl 88 15527 0 15399 4 0 4 4 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 72 106 0 3 2 0 2 2 0 8 0 uaddrrnd 24 3037 0 3011 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3037 0 3011 1 0 1 1 0 8 0 vmmpekpl 168 25491 0 25444 3 0 3 3 0 8 0 vmmpepl 168 293080 0 291033 176 55 121 136 0 357 6 vmsppl 272 3036 0 3011 5 2 3 3 0 8 0 rwobjpl 24 76364 0 68836 47 0 47 47 0 8 0 pdppl 4096 6080 0 6027 239 174 65 72 0 8 12 pvpl 32 1176257 0 1156517 290 103 187 240 0 265 8 pmappl 216 3036 0 3011 2 0 2 2 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1346 0 517 25 0 25 25 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sblock(fffffd8068f70200,fffffd8068f70318,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8068f70200,fffffd8068f70318,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8068f70200,0,ffff8000216099c0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff800021609910) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8074374b70,ffff8000216099c0,3,fffffd807f7d78a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021611510,fffffd8074374b70,fffffd807f7d78a0,ffff800021609a88,ffff800021609a60) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff800021611510,4,1,ffff800000c06f70,9bc) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff800021611510,4,1,ffff800000c06f70,9bc) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff800021611510,4,ffff800021609c08,0,ffff800021609d00) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff800021611510,ffff800021609ca0,ffff800021609d00) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff800021609d70) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8720, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace sblock(fffffd8068f70200,fffffd8068f70318,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd8068f70200,fffffd8068f70318,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd8068f70200,0,ffff8000216099c0,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:517 fifo_write(ffff800021609910) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd8074374b70,ffff8000216099c0,3,fffffd807f7d78a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff800021611510,fffffd8074374b70,fffffd807f7d78a0,ffff800021609a88,ffff800021609a60) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666 ktrgenio(ffff800021611510,4,1,ffff800000c06f70,9bc) at ktrgenio+0x27b ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff800021611510,4,1,ffff800000c06f70,9bc) at ktrgenio+0x27b sys/kern/kern_ktrace.c:265 dofilewritev(ffff800021611510,4,ffff800021609c08,0,ffff800021609d00) at dofilewritev+0x38a sys/kern/sys_generic.c:402 sys_write(ffff800021611510,ffff800021609ca0,ffff800021609d00) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff800021609d70) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe8720, count: -10