kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sys_msgrcv(ffff80002a8227e0,ffff8000361551e0,ffff800036155130) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8227e0,ffff8000361551e0,ffff800036155130) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff8000361551e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000361551e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xafcb9756cd0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff800036155110 rbx 0 rdx 0xffff800001460f40 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0xe860c03b1746a49b r11 0x57831a133fb1bc74 r12 0xfffffd800b126e10 r13 0xdead4110dead4110 r14 0xffff80000148ba00 r15 0xa rip 0xffffffff82e4eb22 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800036155070 ss 0 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=217470 pid=55539 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=83, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7f8a80,0xffff80003393ed30 process=0xffff80003ca5eda0 user=0xffff800036150000, vmspace=0xfffffd806c1095d0 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 78913 105567 34737 0 2 0 syz-executor 61380 369105 34836 0 2 0 syz-executor 61380 231838 34836 0 3 0x4000080 ttyretype syz-executor 61380 359048 34836 0 2 0x4000000 syz-executor 55539 248817 55449 0 2 0 syz-executor *55539 217470 55449 0 7 0x4000000 syz-executor 55539 287058 55449 0 3 0x4000080 fsleep syz-executor 55539 418326 55449 0 2 0x4000000 syz-executor 18367 492622 87347 0 2 0 syz-executor 18367 355130 87347 0 2 0x4000000 syz-executor 8068 456608 0 0 3 0x14200 acct acct 38959 99 17301 0 3 0x2 biowait syz-executor 98362 106897 0 0 3 0x14280 nfsidl nfsio 33516 204545 0 0 3 0x14280 nfsidl nfsio 24077 340868 0 0 3 0x14280 nfsidl nfsio 45608 477109 0 0 3 0x14280 nfsidl nfsio 14194 508672 0 0 3 0x14280 nfsidl nfsio 80977 191411 0 0 3 0x14280 nfsidl nfsio 40352 378277 0 0 3 0x14280 nfsidl nfsio 79904 309104 0 0 3 0x14280 nfsidl nfsio 80094 134436 0 0 3 0x14280 nfsidl nfsio 70725 437509 0 0 3 0x14280 nfsidl nfsio 19975 423308 0 0 3 0x14280 nfsidl nfsio 92991 369679 0 0 3 0x14280 nfsidl nfsio 89095 389309 0 0 3 0x14280 nfsidl nfsio 54656 154332 0 0 3 0x14280 nfsidl nfsio 24128 335845 0 0 3 0x14280 nfsidl nfsio 60624 216299 0 0 3 0x14280 nfsidl nfsio 63952 270731 0 0 3 0x14280 nfsidl nfsio 62625 65718 0 0 3 0x14280 nfsidl nfsio 5172 90685 0 0 3 0x14280 nfsidl nfsio 81276 392138 0 0 3 0x14280 nfsidl nfsio 84357 51176 0 0 3 0x14200 bored sosplice 55449 170688 17301 0 3 0x82 nanoslp syz-executor 48922 322264 17301 0 3 0x82 wait syz-executor 34836 318233 17301 0 3 0x82 nanoslp syz-executor 34737 446113 17301 0 3 0x82 nanoslp syz-executor 37741 230066 17301 0 2 0x2 syz-executor 87347 427630 17301 0 3 0x82 nanoslp syz-executor 86269 10596 17301 0 3 0x82 nanoslp syz-executor 17301 294642 49429 0 3 0x82 kqread syz-executor 49429 290440 62266 0 3 0x10008a sigsusp ksh 62266 466181 39517 0 3 0x98 kqread sshd-session 39517 209478 2319 0 3 0x92 kqread sshd-session 70576 437519 1 0 3 0x100083 ttyin getty 2319 464025 1 0 3 0x88 kqread sshd 23219 161811 70763 73 3 0x1100090 kqread syslogd 70763 478912 1 0 3 0x100082 sbwait syslogd 83175 437043 1 0 3 0x100080 kqread resolvd 69450 499736 8182 77 3 0x100092 kqread dhcpleased 41162 228575 8182 77 3 0x100092 kqread dhcpleased 8182 144942 1 0 3 0x80 kqread dhcpleased 73277 75492 0 0 3 0x14200 bored smr 33561 387707 0 0 2 0x14200 zerothread 61421 481969 0 0 3 0x14200 aiodoned aiodoned 61240 88197 0 0 3 0x14200 syncer update 68951 200035 0 0 3 0x14200 cleaner cleaner 22539 285637 0 0 3 0x14200 reaper reaper 4201 145607 0 0 3 0x14200 pgdaemon pagedaemon 6489 135015 0 0 3 0x14200 bored viomb 1239 373298 0 0 3 0x40014200 acpi0 acpi0 60028 18451 0 0 3 0x14200 bored softnet7 96599 349201 0 0 3 0x14200 bored softnet6 99970 479480 0 0 3 0x14200 bored softnet5 1349 389344 0 0 3 0x14200 bored softnet4 62799 309785 0 0 3 0x14200 bored softnet3 43185 436870 0 0 3 0x14200 bored softnet2 95176 214402 0 0 3 0x14200 bored softnet1 27722 364996 0 0 3 0x14200 bored softnet0 37142 373327 0 0 3 0x14200 bored systqmp 43703 7613 0 0 3 0x14200 bored systq 6682 425349 0 0 3 0x40014200 tmoslp softclock 45948 87419 0 0 3 0x40014200 idle0 1 318017 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 11106K 11380K 166960K 12062 0 pcb 17 16K 18K 166960K 192 0 rtable 165 7K 7K 166960K 385 0 pf 39 14K 19K 166960K 73 0 ifaddr 39 6K 7K 166960K 66 0 ifgroup 63 2K 2K 166960K 88 0 sysctl 3 1K 9K 166960K 12 0 counters 35 18K 18K 166960K 47 0 ioctlops 0 0K 4K 166960K 333 0 iov 0 0K 16K 166960K 59 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1506 95K 95K 166960K 1950 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 93 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 605 0 sigio 0 0K 0K 166960K 9 0 proc 60 59K 116K 166960K 531 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 33 0 in_multi 67 5K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 425 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 212 143K 159K 166960K 6791 0 UVM aobj 21 2K 2K 166960K 21 0 pinsyscall 37 74K 94K 166960K 1653 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 14 0K 2K 166960K 42 0 temp 46 8636K 8758K 166960K 14446 0 kqueue 13 20K 29K 166960K 105 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 167 0 164 3 2 1 3 0 8 0 rtentry 136 118 0 57 4 0 4 4 0 8 0 unpcb 144 548 0 532 6 5 1 6 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 736 168 0 164 7 6 1 7 0 8 0 arp 88 13 0 4 1 0 1 1 0 8 0 inpcb 328 697 0 689 11 8 3 10 0 8 2 ip6q 72 5 0 1 1 0 1 1 0 8 0 ip6af 40 6 0 2 1 0 1 1 0 8 0 nd6 104 23 0 13 1 0 1 1 0 8 0 pkpcb 40 10 0 10 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 9 0 9 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pfosfp 40 1 0 1 1 1 0 1 0 8 0 pfosfpen 112 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 4 1 1 0 1 0 8 0 pfstate 384 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 580 0 271 30 8 22 30 0 8 0 art_table 40 582 0 271 5 0 5 5 0 8 0 art_node 32 118 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 90 0 80 1 0 1 1 0 8 0 shmpl 112 18 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2469 0 967 95 0 95 95 0 8 0 ffsino 256 2469 0 967 95 0 95 95 0 8 0 nchpl 144 3289 0 1607 63 0 63 63 0 8 0 uvmvnodes 80 2926 0 0 60 0 60 60 0 8 0 vnodes 216 2926 0 0 163 0 163 163 0 8 0 namei 1024 11487 0 11486 2 1 1 2 0 8 0 kstatmem 264 46 0 18 2 0 2 2 0 8 0 scsiplug 72 6 0 6 1 1 0 1 0 8 0 scxspl 216 13283 0 13176 15 7 8 8 1 8 0 plimitpl 152 225 0 207 1 0 1 1 0 8 0 sigapl 424 909 0 839 9 0 9 9 0 8 0 knotepl 120 23919 0 23872 18 8 10 11 0 8 7 kqueuepl 184 258 0 249 3 0 3 3 0 8 2 pipepl 304 211 0 184 8 5 3 8 0 8 0 fdescpl 448 864 0 836 5 1 4 5 0 8 0 filepl 120 5648 0 5431 16 7 9 15 0 8 0 lockfpl 104 294 0 292 2 1 1 2 0 8 0 lockfspl 48 138 0 136 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 104 877 0 865 1 0 1 1 0 8 0 zombiepl 144 898 0 896 1 0 1 1 0 8 0 processpl 1168 909 0 839 6 0 6 6 0 8 0 procpl 664 1636 0 1560 8 0 8 8 0 8 0 sockpl 552 1433 0 1406 18 14 4 17 0 8 1 mcl64k 65536 74 0 74 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 3075 0 3025 14 6 8 14 0 8 1 mcl2k2 2112 4 0 4 1 1 0 1 0 8 0 mcl2k 2048 907 0 903 5 3 2 4 0 8 1 mtagpl 96 7 0 4 1 0 1 1 0 8 0 mbufpl 256 9236 0 9065 14 1 13 14 0 8 0 bufpl 280 5026 0 120 351 0 351 351 0 8 0 anonpl 24 150069 0 146977 44 13 31 44 0 187 0 amapchunkpl 152 22517 0 22087 37 15 22 34 0 158 2 amappl16 200 2856 0 2824 15 9 6 15 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 104 0 94 1 0 1 1 0 8 0 amappl13 176 51 0 51 1 1 0 1 0 8 0 amappl12 168 1490 0 1462 3 1 2 3 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 263 0 263 1 1 0 1 0 8 0 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 104 0 94 1 0 1 1 0 8 0 amappl6 120 183 0 178 1 0 1 1 0 8 0 amappl5 112 118 0 111 1 0 1 1 0 8 0 amappl4 104 268 0 251 1 0 1 1 0 8 0 amappl3 96 4257 0 4160 4 0 4 4 0 8 0 amappl2 88 630 0 576 2 0 2 2 0 8 0 amappl1 80 9872 0 9327 13 1 12 13 0 8 0 amappl 88 6067 0 5918 5 0 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 128 256 0 256 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 20 0 0 1 0 1 1 0 8 0 uaddrrnd 24 864 0 836 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 864 0 836 1 0 1 1 0 8 0 vmmpekpl 168 8192 0 8160 2 0 2 2 0 8 0 vmmpepl 168 59394 0 57600 94 3 91 94 0 357 0 vmsppl 368 863 0 836 4 1 3 4 0 8 0 rwobjpl 40 20607 0 16831 40 1 39 39 0 8 0 pdppl 4096 1734 0 1672 100 34 66 80 0 8 4 pvpl 32 381530 0 373239 103 15 88 103 0 265 2 pmappl 216 863 0 836 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 390 0 66 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a8227e0,ffff8000361551e0,ffff800036155130) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8227e0,ffff8000361551e0,ffff800036155130) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff8000361551e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000361551e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xafcb9756cd0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a8227e0,ffff8000361551e0,ffff800036155130) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a8227e0,ffff8000361551e0,ffff800036155130) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff8000361551e0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000361551e0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xafcb9756cd0, count: -3