kernel: protection fault trap, code=0 Stopped at sblock+0x4a: movq 0x8(%rax),%rax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace sblock(fffffd805eab2788,fffffd805eab28c0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd805eab2788,fffffd805eab28c0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd805eab2788,0,ffff8000211ced58,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff8000211ceca0) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd807aeea700,ffff8000211ced58,3,fffffd807f7d8660) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff6550,fffffd807aeea700,fffffd807f7d8660,ffff8000211cee20,ffff8000211cee00) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000ffff6550,1,1,ffff800000c2e7e0,57b) at ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000ffff6550,1,1,ffff800000c2e7e0,57b) at ktrgenio+0x282 sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000ffff6550,1,ffff8000211cefa8,0,ffff8000211cf0a0) at dofilewritev+0x397 sys/kern/sys_generic.c:401 sys_write(ffff8000ffff6550,ffff8000211cf040,ffff8000211cf0a0) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff8000211cf110) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211cf110) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc1f20, count: -10 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000211ceb60 rbx 0xfffffd805eab28c0 rdx 0 rcx 0xb rax 0xb4ce73a6ae94b766 r8 0x44b82fa09b5a53 r9 0 r10 0xf6f3516c56387642 r11 0x962dfc6ce48b4792 r12 0xfffffd805eab2701 r13 0x1 r14 0xfffffd805eab2910 r15 0xfffffd805eab2788 rip 0xffffffff813b19ea sblock+0x4a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000211ceb00 ss 0x10 sblock+0x4a: movq 0x8(%rax),%rax ddb{0}> show proc PROC (syz-fuzzer) pid=289883 stat=onproc flags process=2 proc=1 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff7cf0,0xffff8000ffff62c0 process=0xffff8000211b54d8 user=0xffff8000211ca000, vmspace=0xfffffd806ee42008 estcpu=0, cpticks=1, pctcpu=0.26 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87130 372399 48344 0 2 0 syz-executor.1 87130 204714 48344 0 2 0x4000081 syz-executor.1 60348 307448 91819 0 2 0x83 syz-executor.4 28332 449063 91819 0 2 0x83 syz-executor.0 53060 413839 91819 0 3 0x82 piperd syz-executor.2 99365 102770 91819 0 3 0x82 nanoslp syz-executor.7 35993 44014 91819 0 2 0x83 syz-executor.3 48344 455171 91819 0 2 0x482 syz-executor.1 1410 57546 91819 0 2 0x83 syz-executor.6 4901 311890 91819 0 3 0x82 nanoslp syz-executor.5 40356 200869 1 0 3 0x100083 ttyopn getty 16781 290658 0 0 3 0x14280 nfsidl nfsio 74846 74473 0 0 3 0x14280 nfsidl nfsio 59491 99486 0 0 3 0x14280 nfsidl nfsio 57906 518765 0 0 3 0x14280 nfsidl nfsio 66699 306094 0 0 3 0x14280 nfsidl nfsio 84095 489494 0 0 3 0x14280 nfsidl nfsio 65756 174157 0 0 3 0x14280 nfsidl nfsio 48084 388832 0 0 3 0x14280 nfsidl nfsio 42533 437228 0 0 3 0x14280 nfsidl nfsio 97476 216910 0 0 3 0x14280 nfsidl nfsio 10465 472979 0 0 3 0x14280 nfsidl nfsio 63851 264483 0 0 3 0x14280 nfsidl nfsio 77094 199464 0 0 3 0x14280 nfsidl nfsio 67638 481196 0 0 3 0x14280 nfsidl nfsio 15618 430437 0 0 3 0x14280 nfsidl nfsio 55877 510152 0 0 3 0x14280 nfsidl nfsio 43052 474674 0 0 3 0x14280 nfsidl nfsio 59623 177003 0 0 3 0x14280 nfsidl nfsio 78666 54983 0 0 3 0x14280 nfsidl nfsio 11809 92493 0 0 3 0x14280 nfsidl nfsio 48378 181113 0 0 3 0x14200 bored sosplice *91819 289883 99759 0 7 0x3 syz-fuzzer 91819 519274 99759 0 3 0x4000082 nanoslp syz-fuzzer 91819 83085 99759 0 3 0x4000082 thrsleep syz-fuzzer 91819 5174 99759 0 2 0x4000083 syz-fuzzer 91819 471929 99759 0 2 0x4000083 syz-fuzzer 91819 352921 99759 0 2 0x4000083 syz-fuzzer 91819 45199 99759 0 3 0x4000082 thrsleep syz-fuzzer 91819 407898 99759 0 3 0x4000082 thrsleep syz-fuzzer 99759 261509 11421 0 3 0x10008a sigsusp ksh 11421 8840 31338 0 2 0x93 sshd 31338 26805 1 0 3 0x88 poll sshd 58805 380181 98046 74 3 0x100092 bpf pflogd 98046 77523 1 0 3 0x80 netio pflogd 49441 286780 67731 73 3 0x100090 kqread syslogd 67731 303988 1 0 3 0x100082 netio syslogd 16285 185032 1 0 3 0x100080 kqread resolvd 77825 331854 56291 77 3 0x100092 kqread dhcpleased 15894 495473 56291 77 3 0x100092 kqread dhcpleased 56291 169078 1 0 3 0x80 kqread dhcpleased 28886 154514 0 0 3 0x14200 bored smr 12022 101234 0 0 2 0x14200 zerothread 90349 218094 0 0 3 0x14200 aiodoned aiodoned 84604 84290 0 0 3 0x14200 syncer update 72005 152755 0 0 3 0x14200 cleaner cleaner 55511 38079 0 0 7 0x14200 reaper 60195 83035 0 0 3 0x14200 pgdaemon pagedaemon 75841 232336 0 0 3 0x14200 bored viomb 45970 512632 0 0 3 0x40014200 acpi0 acpi0 73710 387860 0 0 3 0x40014200 idle1 9350 285618 0 0 3 0x14200 bored softnet 62697 398481 0 0 3 0x14200 bored systqmp 27510 85886 0 0 3 0x14200 bored systq 79154 33230 0 0 2 0x40014200 softclock 26536 513205 0 0 3 0x40014200 idle0 1 432521 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 91819 (syz-fuzzer) thread 0xffff8000ffff6550 (289883) exclusive rwlock unplock r = 0 (0xffffffff828f5450) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rwsleep+0x100 sys/kern/kern_synch.c:316 #3 sosend+0x71a sys/kern/uipc_socket.c:563 #4 fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 #5 VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 #6 ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 #7 ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] #7 ktrgenio+0x282 sys/kern/kern_ktrace.c:265 #8 dofilewritev+0x397 sys/kern/sys_generic.c:401 #9 sys_write+0x83 sys/kern/sys_generic.c:300 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82abf850) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rwsleep+0xd5 sys/kern/kern_synch.c:313 #5 sosend+0x71a sys/kern/uipc_socket.c:563 #6 fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 #7 VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 #8 ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 #9 ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] #9 ktrgenio+0x282 sys/kern/kern_ktrace.c:265 #10 dofilewritev+0x397 sys/kern/sys_generic.c:401 #11 sys_write+0x83 sys/kern/sys_generic.c:300 #12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 6585K 7422K 78643K 57854 0 pcb 13 18K 20K 78643K 4783 0 rtable 230 24K 27K 78643K 7053 0 ifaddr 87 25K 32K 78643K 2412 0 sysctl 3 1K 1K 78643K 3 0 counters 54 35K 36K 78643K 678 0 ioctlops 0 0K 8K 78643K 10518 0 iov 0 0K 32K 78643K 2400 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1448 90K 91K 78643K 17970 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 194 0 VM map 2 1K 1K 78643K 2 0 sem 11 3K 5K 78643K 17 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 11 37K 93K 78643K 28724 0 sigio 0 0K 0K 78643K 85 0 proc 72 87K 112K 78643K 4574 0 subproc 104 13K 13K 78643K 1476 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2296 0 in_multi 68 4K 6K 78643K 2368 0 ether_multi 1 0K 0K 78643K 356 0 mrt 2 0K 0K 78643K 120 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 6700 0 pfkey data 0 0K 0K 78643K 4 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 694 1565K 1566K 78643K 367445 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 2055 0 NDP 12 0K 1K 78643K 619 0 temp 171 4732K 8823K 78643K 396605 0 kqueue 10 14K 22K 78643K 1251 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 4012 0 4009 50 49 1 3 0 8 0 rtentry 112 1932 0 1852 4 0 4 4 0 8 0 unpcb 136 15008 0 14993 171 170 1 9 0 8 0 syncache 296 99 0 99 32 32 0 1 0 8 0 tcpqe 32 59 0 59 17 17 0 1 0 8 0 tcpcb 736 19872 0 19855 472 464 8 20 0 8 5 arp 120 329 0 313 1 0 1 1 0 8 0 inpcb 304 55068 0 55056 433 426 7 20 0 8 5 rttmr 72 43 0 43 14 14 0 1 0 8 0 ip6q 72 6 0 6 2 2 0 1 0 8 0 ip6af 40 18 0 18 2 2 0 1 0 8 0 nd6 48 447 0 428 1 0 1 1 0 8 0 pkpcb 40 161 0 161 18 18 0 1 0 8 0 kcovpl 48 113 0 105 1 0 1 1 0 8 0 ppxss 1248 84 0 84 25 24 1 1 0 8 1 pfstscr 40 99 0 99 4 4 0 1 0 8 0 pffrag 232 164 0 163 16 15 1 1 0 482 0 pffrnode 88 164 0 163 16 15 1 1 0 8 0 pffrent 40 4706 0 4705 21 20 1 1 0 8 0 pfosfp 40 1435 0 1433 6 5 1 5 0 8 0 pfosfpen 112 1435 0 1431 22 21 1 21 0 8 0 pfrke_plain 168 4 0 4 1 1 0 1 0 8 0 pfrktable 1344 713 0 694 3 1 2 3 0 8 0 pftag 88 17 0 11 1 0 1 1 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 27 0 25 1 0 1 1 0 8 0 pfstkey 112 189 0 187 1 0 1 1 0 8 0 pfstate 320 103 0 101 2 1 1 2 0 8 0 pfrule 1360 556 0 485 8 1 7 7 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 8648 0 8301 65 39 26 33 0 8 0 art_table 32 8649 0 8301 7 2 5 5 0 8 0 art_node 16 1925 0 1854 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 9 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 39149 0 37589 98 0 98 98 0 8 0 ffsino 272 39149 0 37589 105 0 105 105 0 8 0 nchpl 144 75423 0 73793 63 0 63 63 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 uvmvnodes 80 9431 0 0 193 0 193 193 0 8 0 vnodes 224 9431 0 0 555 0 555 555 0 8 0 namei 1024 267646 0 267646 17 16 1 2 0 8 1 percpumem 16 351 0 312 1 0 1 1 0 8 0 vcpupl 2048 226 0 1 29 0 29 29 0 8 0 vmpool 560 318 0 93 21 4 17 17 0 8 0 pfiaddrpl 120 332 0 301 2 0 2 2 0 8 0 scsiplug 72 20 0 20 7 7 0 1 0 8 0 scxspl 216 239723 0 239723 63 60 3 8 0 8 3 plimitpl 152 3214 0 3199 1 0 1 1 0 8 0 sigapl 424 28862 0 28803 10 2 8 8 0 8 0 futexpl 64 280654 0 280654 8 7 1 1 0 8 1 knotepl 112 423 0 0 5 0 5 5 0 8 0 kqueuepl 216 6376 0 6362 143 138 5 7 0 8 4 pipepl 336 5772 0 5744 178 175 3 13 0 8 0 fdescpl 496 28793 0 28769 7 3 4 5 0 8 0 filepl 152 214766 0 214528 316 301 15 26 0 8 4 lockfpl 104 8627 0 8625 16 15 1 3 0 8 0 lockfspl 48 2383 0 2381 1 0 1 1 0 8 0 sessionpl 144 130 0 113 1 0 1 1 0 8 0 pgrppl 48 189 0 172 1 0 1 1 0 8 0 ucredpl 96 28134 0 28116 1 0 1 1 0 8 0 zombiepl 144 28803 0 28801 4 3 1 1 0 8 0 processpl 1064 28862 0 28801 5 0 5 5 0 8 0 procpl 672 86107 0 86038 59 51 8 10 0 8 0 srpgc 96 78 0 78 22 22 0 1 0 8 0 sosppl 168 248 0 248 40 40 0 1 0 8 0 sockpl 480 74366 0 74336 1270 1258 12 35 0 8 8 mcl64k 65536 74 0 0 6 3 3 3 0 8 0 mcl16k 16384 41 0 0 5 2 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 51 0 0 3 1 2 2 0 8 0 mcl8k 8192 49 0 0 4 1 3 3 0 8 0 mcl4k 4096 34 0 0 5 2 3 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 515 0 0 21 4 17 19 0 8 0 mtagpl 96 1597 0 0 17 0 17 17 0 8 0 mbufpl 256 9288 0 0 558 0 558 558 0 8 0 bufpl 288 54471 0 45039 675 1 674 674 0 8 0 anonpl 24 8497996 0 8469178 561 372 189 205 0 186 0 amapchunkpl 152 920927 0 920041 239 193 46 55 0 158 0 amappl16 200 86034 0 84828 278 205 73 77 0 8 4 amappl15 192 3349 0 3345 1 0 1 1 0 8 0 amappl14 184 2918 0 2914 1 0 1 1 0 8 0 amappl13 176 3472 0 3471 1 0 1 1 0 8 0 amappl12 168 4080 0 4073 1 0 1 1 0 8 0 amappl11 160 3466 0 3449 1 0 1 1 0 8 0 amappl10 152 3829 0 3815 1 0 1 1 0 8 0 amappl9 144 5642 0 5639 1 0 1 1 0 8 0 amappl8 136 6414 0 6221 7 0 7 7 0 8 0 amappl7 128 3688 0 3676 1 0 1 1 0 8 0 amappl6 120 5783 0 5753 3 1 2 2 0 8 0 amappl5 112 26202 0 26177 1 0 1 1 0 8 0 amappl4 104 9927 0 9892 2 0 2 2 0 8 0 amappl3 96 6983 0 6966 1 0 1 1 0 8 0 amappl2 88 8398 0 8333 3 1 2 3 0 8 0 amappl1 80 527921 0 527394 27 13 14 19 0 8 0 amappl 88 364480 0 364137 16 6 10 10 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 29111 0 28861 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 29111 0 28861 2 0 2 2 0 8 0 vmmpekpl 168 227964 0 227863 5 0 5 5 0 8 0 vmmpepl 168 2679089 0 2675502 524 338 186 194 0 357 4 vmsppl 368 29110 0 28861 26 2 24 24 0 8 0 rwobjpl 56 657166 0 645169 223 51 172 174 0 8 0 pdppl 4096 58229 0 57947 1447 1153 294 294 0 8 12 pvpl 32 14275003 0 14250719 855 626 229 283 0 265 0 pmappl 248 29110 0 28861 18 2 16 16 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 3726 0 1865 54 0 54 54 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sblock(fffffd805eab2788,fffffd805eab28c0,1) at sblock+0x4a soassertlocked sys/kern/uipc_socket2.c:323 [inline] sblock(fffffd805eab2788,fffffd805eab28c0,1) at sblock+0x4a sys/kern/uipc_socket2.c:378 sosend(fffffd805eab2788,0,ffff8000211ced58,0,0,0) at sosend+0x280 sys/kern/uipc_socket.c:527 fifo_write(ffff8000211ceca0) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:288 VOP_WRITE(fffffd807aeea700,ffff8000211ced58,3,fffffd807f7d8660) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff6550,fffffd807aeea700,fffffd807f7d8660,ffff8000211cee20,ffff8000211cee00) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrgenio(ffff8000ffff6550,1,1,ffff800000c2e7e0,57b) at ktrgenio+0x282 ktrwrite2 sys/kern/kern_ktrace.c:630 [inline] ktrgenio(ffff8000ffff6550,1,1,ffff800000c2e7e0,57b) at ktrgenio+0x282 sys/kern/kern_ktrace.c:265 dofilewritev(ffff8000ffff6550,1,ffff8000211cefa8,0,ffff8000211cf0a0) at dofilewritev+0x397 sys/kern/sys_generic.c:401 sys_write(ffff8000ffff6550,ffff8000211cf040,ffff8000211cf0a0) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff8000211cf110) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211cf110) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc1f20, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82abf648) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82abf648) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000210f97a0) at reaper+0x150 sys/kern/kern_exit.c:450 end trace frame: 0x0, count: -5