kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x3f2: 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(ffff8000fffee548,ffff80002a2fa1c0,ffff80002a2fa110) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff8000fffee548,ffff80002a2fa1c0,ffff80002a2fa110) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a2fa1c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fa1c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0c5b14f8c0, count: -3 ddb{1}> show registers rdi 0 rsi 0x200000000e88 rbp 0xffff80002a2fa0e0 rbx 0 rdx 0 rcx 0xffff8000fffee548 rax 0x48 r8 0x7f7fffffc000 r9 0xfffffd80097fd410 r10 0x9de3b206b33d2f30 r11 0x7eecb3825b2785c5 r12 0xfffffd806bee9f00 r13 0xdeafbeaddeafbead r14 0xffff8000015a7700 r15 0x48 rip 0xffffffff820abd92 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a2fa040 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb{1}> show proc PROC (syz-executor) tid=365391 pid=88102 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=75, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef4d8,0xffff8000393f9788 process=0xffff80003b817040 user=0xffff80002a2f5000, vmspace=0xfffffd807e0053f0 estcpu=25, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53884 152411 88882 32767 2 0x10 syz-executor 53884 145878 88882 32767 3 0x4000090 fsleep syz-executor 88102 440872 40252 32767 7 0x10 syz-executor *88102 365391 40252 32767 7 0x4000010 syz-executor 88102 58981 40252 32767 2 0x4000010 syz-executor 51368 356281 17735 32767 3 0x10 biowait syz-executor 40252 510991 46025 32767 3 0x90 nanoslp syz-executor 51839 284305 9230 32767 3 0x90 piperd syz-executor 90302 491742 41979 32767 3 0x90 piperd syz-executor 24012 257180 59601 32767 3 0x90 piperd syz-executor 88868 192156 57260 32767 3 0x90 piperd syz-executor 88882 247668 98925 32767 3 0x90 nanoslp syz-executor 9230 204631 22042 0 3 0x82 wait syz-executor 17735 95237 22042 0 3 0x82 wait syz-executor 46025 291198 22042 0 3 0x82 wait syz-executor 59601 358131 22042 0 3 0x82 wait syz-executor 57260 240105 22042 0 3 0x82 wait syz-executor 41979 307725 22042 0 3 0x82 wait syz-executor 98925 254935 22042 0 3 0x82 wait syz-executor 22042 471414 68609 0 3 0x82 nanoslp syz-executor 68609 427156 8490 0 3 0x10008a sigsusp ksh 8490 95998 43467 0 3 0x98 kqread sshd-session 43467 101382 35735 0 3 0x92 kqread sshd-session 80825 420837 1 0 3 0x100083 ttyin getty 35735 72753 1 0 3 0x88 kqread sshd 71691 223691 48427 73 3 0x1100090 kqread syslogd 48427 116561 1 0 3 0x100082 sbwait syslogd 90627 485637 1 0 3 0x100080 kqread resolvd 26618 77956 21918 77 3 0x100092 kqread dhcpleased 2656 227423 21918 77 3 0x100092 kqread dhcpleased 21918 133110 1 0 3 0x80 kqread dhcpleased 90717 134033 0 0 3 0x14200 bored smr 65272 197825 0 0 2 0x14200 zerothread 95349 442448 0 0 3 0x14200 aiodoned aiodoned 73598 75634 0 0 3 0x14200 syncer update 12504 150315 0 0 3 0x14200 cleaner cleaner 64234 210372 0 0 3 0x14200 reaper reaper 18095 20653 0 0 3 0x14200 pgdaemon pagedaemon 83738 284379 0 0 3 0x14200 bored viomb 87176 406326 0 0 3 0x40014200 acpi0 acpi0 61674 153163 0 0 3 0x40014200 idle1 98680 124973 0 0 3 0x14200 bored softnet1 21383 249340 0 0 3 0x14200 bored softnet0 88501 219843 0 0 3 0x14200 bored systqmp 76748 495859 0 0 3 0x14200 bored systq 76367 166500 0 0 3 0x14200 tmoslp softclockmp 41001 482521 0 0 3 0x40014200 tmoslp softclock 38302 165235 0 0 3 0x40014200 idle0 1 60906 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 88102 (syz-executor) thread 0xffff8000fffee548 (365391) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838bcd80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #6 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #7 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 #8 alltraps_kern_meltdown+0x7b #9 copyout+0x64 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 Process 51368 (syz-executor) thread 0xffff8000393f82b8 (356281) exclusive rrwlock inode r = 0 (0xfffffd8062242a28) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d3e1a10) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11050 12016K 12034K 166960K 12144 0 pcb 17 12K 12K 166960K 17 0 rtable 217 6K 7K 166960K 359 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 12K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1523 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 3 1K 1K 166960K 3 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 125K 166960K 466 0 sigio 0 0K 0K 166960K 3 0 proc 58 99K 163K 166960K 515 0 subproc 63 3K 4K 166960K 216 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 51 0 in_multi 88 6K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 390 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 201 150K 182K 166960K 5455 0 UVM aobj 8 2K 4K 166960K 9 0 pinsyscall 39 78K 113K 166960K 1522 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 10 0K 2K 166960K 27 0 temp 44 8677K 8741K 166960K 5272 0 kqueue 13 20K 27K 166960K 66 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 53 0 50 1 0 1 1 0 8 0 rtentry 176 113 0 13 6 0 6 6 0 8 0 unpcb 144 188 0 173 2 1 1 2 0 8 0 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpcb 736 109 0 105 2 1 1 2 0 8 0 arp 136 19 0 2 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 308 0 300 4 2 2 4 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 152 25 0 4 1 0 1 1 0 8 0 kcovpl 48 24 0 17 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 455 0 46 29 0 29 29 0 8 0 art_table 40 456 0 46 5 0 5 5 0 8 0 art_node 32 113 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1964 0 438 96 0 96 96 0 8 0 ffsino 296 1964 0 438 118 0 118 118 0 8 0 nchpl 144 2540 0 840 64 0 64 64 0 8 0 vnodes 216 2189 0 0 122 0 122 122 0 8 0 namei 1024 7861 0 7860 1 0 1 1 0 8 0 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 8889 0 8888 9 8 1 8 1 8 0 plimitpl 152 108 0 86 3 1 2 2 0 8 1 sigapl 424 718 0 672 7 0 7 7 0 8 0 knotepl 120 314 0 0 10 0 10 10 0 8 0 kqueuepl 224 148 0 139 5 4 1 5 0 8 0 pipepl 344 175 0 148 3 0 3 3 0 8 0 fdescpl 528 702 0 672 4 0 4 4 0 8 1 filepl 160 3220 0 3027 12 2 10 12 0 8 1 lockfpl 104 115 0 112 1 0 1 1 0 8 0 lockfspl 48 42 0 39 1 0 1 1 0 8 0 sessionpl 144 40 0 25 1 0 1 1 0 8 0 pgrppl 48 101 0 79 1 0 1 1 0 8 0 ucredpl 104 438 0 420 1 0 1 1 0 8 0 zombiepl 144 672 0 672 1 0 1 1 0 8 1 processpl 1232 718 0 672 5 0 5 5 0 8 0 procpl 664 1150 0 1101 7 1 6 7 0 8 1 sosppl 176 1 0 1 1 1 0 1 0 8 0 sockpl 752 557 0 531 7 3 4 7 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 271 0 0 17 0 17 17 0 8 0 bufpl 280 2987 0 118 205 0 205 205 0 8 0 anonpl 32 5812 0 0 47 0 47 47 0 246 0 amapchunkpl 152 17389 0 17001 31 6 25 31 0 158 7 amappl16 200 2375 0 2356 5 2 3 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 3 0 3 1 1 0 1 0 8 0 amappl13 176 396 0 395 1 0 1 1 0 8 0 amappl12 168 1040 0 1001 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 82 0 81 1 0 1 1 0 8 0 amappl6 120 269 0 258 1 0 1 1 0 8 0 amappl5 112 81 0 73 1 0 1 1 0 8 0 amappl4 104 387 0 363 1 0 1 1 0 8 0 amappl3 96 2880 0 2807 3 0 3 3 0 8 0 amappl2 88 846 0 774 2 0 2 2 0 8 0 amappl1 80 10891 0 10363 14 1 13 14 0 8 0 amappl 88 4688 0 4556 5 0 5 5 0 92 1 uvmvnodes 80 110 0 0 3 0 3 3 0 8 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 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 702 0 672 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 702 0 672 1 0 1 1 0 8 0 vmmpekpl 168 7778 0 7733 3 0 3 3 0 8 0 vmmpepl 168 52490 0 50787 99 8 91 99 0 357 1 vmsppl 488 701 0 672 7 1 6 6 0 8 1 rwobjpl 80 17257 0 16372 23 1 22 22 0 8 0 pdppl 4096 1412 0 1344 122 42 80 98 0 8 12 pvpl 32 14933 0 0 121 0 121 121 0 265 0 pmappl 256 701 0 672 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 46 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff838bc580) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bc580) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a2f4a70,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:159 syscall(ffff80002a2f4c50) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a2f4c50) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76a7f2bc5120, count: -9 ddb{0}> machine ddbcpu 1 Stopped at sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb{1}> trace sys_msgrcv(ffff8000fffee548,ffff80002a2fa1c0,ffff80002a2fa110) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff8000fffee548,ffff80002a2fa1c0,ffff80002a2fa110) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80002a2fa1c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fa1c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0c5b14f8c0, count: -3