login: kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x2df: movq 0x10(%r13),%rdi ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:649 [inline] sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:359 syscall(ffff80002af38510) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af38510) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8290d8120, count: -3 ddb{1}> show registers rdi 0x106e __ALIGN_SIZE+0x6e rsi 0x200013c8 rbp 0xffff80002af38430 rbx 0x106e __ALIGN_SIZE+0x6e rdx 0 rcx 0 rax 0xffff8000fffefa48 r8 0x7f7fffffc000 r9 0x1 r10 0xe800e94b9b4a95c r11 0xb6f473f1d535dac3 r12 0xfffffd8062f10bb8 r13 0xdeadbeefdeadbeef r14 0xffff800000c35700 r15 0x1c0 rip 0xffffffff823d1ecf sys_msgrcv+0x2df cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002af383a0 ss 0 sys_msgrcv+0x2df: movq 0x10(%r13),%rdi ddb{1}> show proc PROC (syz-executor.6) pid=318481 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffeea88,0xffff8000fffeed38 process=0xffff8000fffea588 user=0xffff80002af33000, vmspace=0xfffffd8065c012f8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77150 251624 52135 32767 3 0x90 nanoslp syz-executor.4 77150 354080 52135 32767 3 0x4000090 netcon2 syz-executor.4 77150 36099 52135 32767 3 0x4000090 fsleep syz-executor.4 77150 111988 52135 32767 3 0x4000090 fsleep syz-executor.4 67744 27739 81197 32767 3 0x90 nanoslp syz-executor.6 67744 226256 81197 32767 3 0x4000090 fsleep syz-executor.6 *67744 318481 81197 32767 7 0x4000010 syz-executor.6 67744 229891 81197 32767 2 0x4000010 syz-executor.6 67744 156721 81197 32767 2 0x4000010 syz-executor.6 67744 340311 81197 32767 2 0x4000010 syz-executor.6 67744 145878 81197 32767 7 0x4000010 syz-executor.6 32746 301353 34414 32767 3 0x90 nanoslp syz-executor.3 32746 318190 34414 32767 3 0x4000090 fsleep syz-executor.3 32746 63017 34414 32767 3 0x4000090 netcon syz-executor.3 32746 59079 34414 32767 3 0x4000090 fsleep syz-executor.3 91227 169024 0 0 3 0x14200 bored sosplice 20393 246787 31248 32767 3 0x90 piperd syz-executor.5 61600 298340 46164 32767 3 0x90 piperd syz-executor.7 52135 126670 34200 32767 3 0x90 nanoslp syz-executor.4 81197 485120 99521 32767 3 0x90 nanoslp syz-executor.6 46164 219706 49208 0 3 0x82 wait syz-executor.7 34414 289064 79088 32767 3 0x90 nanoslp syz-executor.3 31248 318419 49208 0 3 0x82 wait syz-executor.5 99521 464125 49208 0 3 0x82 wait syz-executor.6 34200 350776 49208 0 3 0x82 wait syz-executor.4 39927 424935 91674 32767 3 0x90 piperd syz-executor.2 79088 285688 49208 0 3 0x82 wait syz-executor.3 91674 75427 49208 0 3 0x82 wait syz-executor.2 56055 156510 25330 32767 3 0x90 piperd syz-executor.1 25330 34305 49208 0 3 0x82 wait syz-executor.1 86027 347740 88670 32767 3 0x90 piperd syz-executor.0 88670 163746 49208 0 3 0x82 wait syz-executor.0 49208 432708 88715 0 3 0x82 thrsleep syz-fuzzer 49208 263866 88715 0 3 0x4000082 thrsleep syz-fuzzer 49208 519988 88715 0 3 0x4000082 thrsleep syz-fuzzer 49208 195931 88715 0 3 0x4000082 thrsleep syz-fuzzer 49208 419563 88715 0 3 0x4000082 thrsleep syz-fuzzer 49208 348019 88715 0 3 0x4000082 thrsleep syz-fuzzer 49208 356436 88715 0 3 0x4000082 kqread syz-fuzzer 49208 350009 88715 0 3 0x4000082 thrsleep syz-fuzzer 49208 151753 88715 0 3 0x4000082 thrsleep syz-fuzzer 88715 406851 57555 0 3 0x10008a sigsusp ksh 57555 365154 55777 0 3 0x9a kqread sshd 20145 351324 1 0 3 0x100083 ttyin getty 55777 204928 1 0 3 0x88 kqread sshd 36379 141916 79529 73 3 0x1100090 kqread syslogd 79529 147105 1 0 3 0x100082 netio syslogd 91740 148106 1 0 3 0x100080 kqread resolvd 32521 138398 71122 77 3 0x100092 kqread dhcpleased 1041 269724 71122 77 3 0x100092 kqread dhcpleased 71122 145881 1 0 3 0x80 kqread dhcpleased 24271 355231 0 0 3 0x14200 bored smr 78222 262134 0 0 2 0x14200 zerothread 78147 69709 0 0 3 0x14200 aiodoned aiodoned 60615 23865 0 0 3 0x14200 syncer update 36773 145163 0 0 3 0x14200 cleaner cleaner 37335 295202 0 0 3 0x14200 reaper reaper 16912 51370 0 0 3 0x14200 pgdaemon pagedaemon 45148 392762 0 0 3 0x14200 bored viomb 87912 175213 0 0 3 0x40014200 acpi0 acpi0 32745 245051 0 0 3 0x40014200 idle1 94780 357121 0 0 3 0x14200 bored softnet 36978 195657 0 0 3 0x14200 bored systqmp 64256 511179 0 0 3 0x14200 bored systq 79119 34673 0 0 3 0x40014200 bored softclock 66637 168674 0 0 3 0x40014200 idle0 1 121421 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 67744 (syz-executor.6) thread 0xffff8000fffefa48 (318481) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ad20f0) #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+0x198 sys/kern/kern_synch.c:433 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #6 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #7 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #8 kpageflttrap+0x209 #9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #10 alltraps_kern_meltdown+0x7b #11 copyout+0x53 #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10174 6407K 6419K 78643K 11264 0 pcb 13 10K 12K 78643K 15 0 rtable 246 7K 7K 78643K 432 0 ifaddr 81 16K 16K 78643K 82 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 107 0 iov 0 0K 16K 78643K 184 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1308 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 191 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 117K 78643K 891 0 sigio 0 0K 0K 78643K 10 0 proc 56 74K 111K 78643K 499 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 52 0 in_multi 99 6K 6K 78643K 126 0 ether_multi 1 0K 0K 78643K 10 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 697 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 299 82K 91K 78643K 12923 0 UVM aobj 25 2K 2K 78643K 28 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 26 0 NDP 11 0K 2K 78643K 27 0 temp 121 4702K 4765K 78643K 5881 0 kqueue 12 18K 26K 78643K 98 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 48 0 45 1 0 1 1 0 8 0 rtentry 112 115 0 1 4 0 4 4 0 8 0 unpcb 136 528 0 515 5 4 1 5 0 8 0 syncache 296 15 0 15 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 308 0 293 10 6 4 8 0 8 2 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 5 0 4 2 1 1 1 0 8 0 ipqe 40 180 0 179 2 1 1 1 0 8 0 inpcb 304 1418 0 1405 22 10 12 12 0 8 10 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 28 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 492 0 0 31 0 31 31 0 8 0 art_table 32 493 0 0 4 0 4 4 0 8 0 art_node 16 114 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 17 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 188 0 178 1 0 1 1 0 8 0 shmpl 112 25 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2368 0 938 90 0 90 90 0 8 0 ffsino 272 2368 0 938 96 0 96 96 0 8 0 nchpl 144 3770 0 2111 62 0 62 62 0 8 0 uvmvnodes 80 2481 0 0 51 0 51 51 0 8 0 vnodes 224 2481 0 0 146 0 146 146 0 8 0 namei 1024 11759 0 11759 2 1 1 2 0 8 1 percpumem 16 40 0 0 1 0 1 1 0 8 0 scxspl 216 10901 0 10901 9 8 1 8 0 8 1 plimitpl 152 92 0 70 1 0 1 1 0 8 0 sigapl 424 1167 0 1120 7 1 6 7 0 8 0 futexpl 64 7803 0 7798 1 0 1 1 0 8 0 knotepl 120 210 0 0 6 0 6 6 0 8 0 kqueuepl 216 123 0 115 1 0 1 1 0 8 0 pipepl 336 284 0 256 6 0 6 6 0 8 3 fdescpl 496 1152 0 1120 7 2 5 6 0 8 0 filepl 152 6627 0 6386 19 4 15 15 0 8 5 lockfpl 104 87 0 85 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 113 0 96 1 0 1 1 0 8 0 ucredpl 96 550 0 532 1 0 1 1 0 8 0 zombiepl 144 1120 0 1120 1 0 1 1 0 8 1 processpl 1064 1167 0 1120 5 1 4 4 0 8 0 procpl 672 2827 0 2760 8 1 7 8 0 8 0 sosppl 168 8 0 8 2 1 1 1 0 8 1 sockpl 480 2002 0 1973 54 33 21 21 0 8 16 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 1 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 146 0 0 18 0 18 18 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 419 0 0 26 0 26 26 0 8 0 bufpl 288 4804 0 141 334 0 334 334 0 8 0 anonpl 24 278763 0 265115 106 6 100 100 0 186 9 amapchunkpl 152 30599 0 29870 40 3 37 37 0 158 4 amappl16 200 2139 0 1771 21 1 20 20 0 8 0 amappl15 192 86 0 82 1 0 1 1 0 8 0 amappl14 184 122 0 114 1 0 1 1 0 8 0 amappl13 176 80 0 78 1 0 1 1 0 8 0 amappl12 168 319 0 312 1 0 1 1 0 8 0 amappl11 160 48 0 36 1 0 1 1 0 8 0 amappl10 152 121 0 116 1 0 1 1 0 8 0 amappl9 144 469 0 464 1 0 1 1 0 8 0 amappl8 136 876 0 813 3 0 3 3 0 8 0 amappl7 128 409 0 391 1 0 1 1 0 8 0 amappl6 120 193 0 173 2 1 1 2 0 8 0 amappl5 112 1008 0 986 1 0 1 1 0 8 0 amappl4 104 794 0 768 1 0 1 1 0 8 0 amappl3 96 530 0 513 1 0 1 1 0 8 0 amappl2 88 642 0 597 3 1 2 3 0 8 0 amappl1 80 23783 0 23187 18 3 15 18 0 8 0 amappl 88 12465 0 12236 7 0 7 7 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 27 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1152 0 1120 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1152 0 1120 1 0 1 1 0 8 0 vmmpekpl 168 13912 0 13866 3 0 3 3 0 8 0 vmmpepl 168 107791 0 105389 124 1 123 123 0 357 4 vmsppl 368 1151 0 1120 4 0 4 4 0 8 0 rwobjpl 56 29275 0 25478 55 0 55 55 0 8 0 pdppl 4096 2311 0 2240 115 34 81 91 0 8 10 pvpl 32 586018 0 567499 242 27 215 242 0 265 52 pmappl 248 1151 0 1120 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 746 0 43 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff828f4ff0) 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(ffffffff82ad1ee8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ad1ee8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e38abd0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002e38abd0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa7a301c380, count: -6 ddb{0}> machine ddbcpu 1 Stopped at sys_msgrcv+0x2df: movq 0x10(%r13),%rdi ddb{1}> trace sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:649 [inline] sys_msgrcv(ffff8000fffefa48,ffff80002af38448,ffff80002af384a0) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:359 syscall(ffff80002af38510) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002af38510) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8290d8120, count: -3