login: uvm_fault(0xfffffd807eff95c0, 0x8bc2c5b0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd807eff95c0, 0x8bc2c5b0, 0, 1) -> e spllower(ffff8000212a6000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716 end trace frame: 0xffff8000222abc90, count: 0 ddb{0}> trace spllower(ffff8000212a6000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716 single_thread_check_locked(ffff80002123c2a8,0) at single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970 userret(ffff80002123c2a8) at userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline] userret(ffff80002123c2a8) at userret+0x335 sys/kern/kern_sig.c:1936 syscall(ffff8000222abdc0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff8000222abdc0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b590aaca0, count: -5 ddb{0}> show registers rdi 0xffff8000212a6000 rsi 0xa0e rbp 0xffff8000222abc30 rbx 0x1000 __ALIGN_SIZE rdx 0xffff8000212a6000 rcx 0xa0d rax 0x212a6000 r8 0xffffffff819ec850 setrunnable+0xa0 r9 0x5 r10 0x52e24d48bad6d055 r11 0xd0b162d633066063 r12 0xffffffff826fbff0 cpu_info_full_primary+0x1ff0 r13 0x1 r14 0x212a6000 r15 0xffff80002123c2a8 rip 0xffffffff814e22e4 spllower+0x34 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000222abbe0 ss 0x10 spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx ddb{0}> show proc PROC (syz-executor.0) pid=374414 stat=onproc flags process=1000 proc=4080000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002123c018,0xffffffff828e7f70 process=0xffff8000212358d0 user=0xffff8000222a6000, vmspace=0xfffffd807eff95c0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3175 482227 22051 0 7 0x3000 syz-executor.0 * 3175 374414 22051 0 7 0x4081000 syz-executor.0 22051 60813 97417 0 3 0x82 nanosleep syz-executor.0 97417 228537 78878 0 3 0x82 kqread syz-fuzzer 97417 511857 78878 0 3 0x4000082 nanosleep syz-fuzzer 97417 175263 78878 0 3 0x4000082 nanosleep syz-fuzzer 97417 272790 78878 0 3 0x4000082 thrsleep syz-fuzzer 97417 375543 78878 0 3 0x4000082 thrsleep syz-fuzzer 97417 439223 78878 0 3 0x4000082 thrsleep syz-fuzzer 97417 481954 78878 0 3 0x4000082 thrsleep syz-fuzzer 78878 140079 72277 0 3 0x10008a pause ksh 72277 222840 34229 0 3 0x92 select sshd 25525 103913 1 0 3 0x100083 ttyin getty 34229 219307 1 0 3 0x80 select sshd 77114 255501 20164 74 3 0x100092 bpf pflogd 20164 420967 1 0 3 0x80 netio pflogd 18887 149629 94061 73 3 0x100090 kqread syslogd 94061 354212 1 0 3 0x100082 netio syslogd 74461 352682 1 77 3 0x100090 poll dhclient 33090 129406 1 0 3 0x80 poll dhclient 59011 142833 0 0 3 0x14200 bored smr 10619 344049 0 0 3 0x14200 pgzero zerothread 88459 481845 0 0 3 0x14200 aiodoned aiodoned 63248 266895 0 0 3 0x14200 syncer update 55855 125641 0 0 3 0x14200 cleaner cleaner 16976 182980 0 0 3 0x14200 reaper reaper 51314 328528 0 0 3 0x14200 pgdaemon pagedaemon 99633 451723 0 0 3 0x14200 bored crynlk 43372 123380 0 0 3 0x14200 bored crypto 96035 511294 0 0 3 0x14200 bored viomb 90146 302214 0 0 3 0x40014200 acpi0 acpi0 95034 187891 0 0 3 0x40014200 idle1 96477 225926 0 0 3 0x14200 bored softnet 23695 352927 0 0 3 0x14200 bored systqmp 28367 246318 0 0 3 0x14200 bored systq 77932 47900 0 0 3 0x40014200 bored softclock 33001 19503 0 0 3 0x40014200 idle0 1 258084 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 3175 (syz-executor.0) thread 0xffff80002123c2a8 (374414) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828ce4d8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176 #1 kpageflttrap+0x23f sys/arch/amd64/amd64/trap.c:277 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 #3 alltraps_kern_meltdown+0x7b #4 spllower+0x34 sys/arch/amd64/amd64/intr.c:716 #5 single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970 #6 userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline] #6 userret+0x335 sys/kern/kern_sig.c:1936 #7 syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] #7 syscall+0x55c sys/arch/amd64/amd64/trap.c:612 #8 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9479 6413K 6413K 78643K 10569 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 38 0 counters 41 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1200 75K 75K 78643K 1205 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1825 197K 290K 78643K 13109 0 file desc 3 8K 12K 78643K 18 0 proc 59 63K 83K 78643K 407 0 subproc 16 1K 1K 78643K 17 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 22 1K 1K 78643K 22 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 336 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 58 11K 11K 78643K 687 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 7 0 temp 45 3954K 4017K 78643K 1913 0 kqueue 3 4K 4K 78643K 3 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 arp 64 4 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 120 25 0 15 1 0 1 1 0 8 0 syncache 296 4 0 4 1 0 1 1 0 8 1 tcpcb 736 10 0 4 1 0 1 1 0 8 0 inpcb 296 35 0 29 1 0 1 1 0 8 0 nd6 48 3 0 0 1 0 1 1 0 8 0 kcovpl 48 1 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 11 0 0 1 0 1 1 0 8 0 pfstkey 112 11 0 0 1 0 1 1 0 8 0 pfstate 328 11 0 0 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 144 0 0 9 0 9 9 0 8 0 art_table 32 145 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1421 0 22 88 0 88 88 0 8 0 ffsino 272 1421 0 22 94 0 94 94 0 8 0 nchpl 144 1636 0 38 60 0 60 60 0 8 0 uvmvnodes 72 1448 0 0 27 0 27 27 0 8 0 vnodes 208 1448 0 0 77 0 77 77 0 8 0 namei 1024 4118 0 4118 1 0 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 216 4857 0 4857 2 1 1 2 0 8 1 plimitpl 152 14 0 7 1 0 1 1 0 8 0 sigapl 424 239 0 208 4 0 4 4 0 8 0 futexpl 56 2 0 2 1 0 1 1 0 8 1 knotepl 112 62 0 50 1 0 1 1 0 8 0 kqueuepl 152 2 0 0 1 0 1 1 0 8 0 pipepl 304 76 0 68 1 0 1 1 0 8 0 fdescpl 496 223 0 208 3 0 3 3 0 8 0 filepl 152 1055 0 979 4 0 4 4 0 8 1 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 53 0 44 1 0 1 1 0 8 0 zombiepl 144 208 0 208 1 0 1 1 0 8 1 processpl 1056 239 0 208 3 0 3 3 0 8 0 procpl 656 246 0 208 4 0 4 4 0 8 0 sockpl 400 77 0 59 3 0 3 3 0 8 1 mcl4k 4096 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 89 0 0 12 0 12 12 0 8 1 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 116 0 0 7 0 7 7 0 8 0 bufpl 280 3529 0 181 240 0 240 240 0 8 0 anonpl 16 24328 0 22113 16 1 15 15 0 124 4 amapchunkpl 152 776 0 701 5 0 5 5 0 158 1 amappl16 192 163 0 105 4 0 4 4 0 8 1 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 25 0 18 1 0 1 1 0 8 0 amappl13 168 22 0 19 1 0 1 1 0 8 0 amappl12 160 11 0 9 1 0 1 1 0 8 0 amappl11 152 56 0 41 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 387 0 385 1 0 1 1 0 8 0 amappl8 128 87 0 71 1 0 1 1 0 8 0 amappl7 120 238 0 230 1 0 1 1 0 8 0 amappl6 112 61 0 51 1 0 1 1 0 8 0 amappl5 104 359 0 342 1 0 1 1 0 8 0 amappl4 96 280 0 256 1 0 1 1 0 8 0 amappl3 88 114 0 106 1 0 1 1 0 8 0 amappl2 80 916 0 854 2 0 2 2 0 8 0 amappl1 72 15194 0 14736 24 5 19 19 0 8 9 amappl 80 465 0 435 1 0 1 1 0 84 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 223 0 208 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 223 0 208 1 0 1 1 0 8 0 vmmpekpl 168 6008 0 5986 2 0 2 2 0 8 0 vmmpepl 168 33486 0 32364 82 5 77 77 0 357 28 vmsppl 368 222 0 208 2 0 2 2 0 8 0 pdppl 4096 453 0 416 53 12 41 41 0 8 4 pvpl 32 117733 0 112581 119 0 119 119 0 265 76 pmappl 232 222 0 208 1 0 1 1 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 280 0 15 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace spllower(ffff8000212a6000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716 single_thread_check_locked(ffff80002123c2a8,0) at single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970 userret(ffff80002123c2a8) at userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline] userret(ffff80002123c2a8) at userret+0x335 sys/kern/kern_sig.c:1936 syscall(ffff8000222abdc0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff8000222abdc0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b590aaca0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 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(ffffffff828ce2d0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828ce2d0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828ce2d0,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:433 sleep_finish(ffff80002129dcd0,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 single_thread_set(ffff80002123c018,3,0) at single_thread_set+0x3f4 single_thread_wait sys/kern/kern_sig.c:2112 [inline] single_thread_set(ffff80002123c018,3,0) at single_thread_set+0x3f4 sys/kern/kern_sig.c:2092 exit1(ffff80002123c018,0,0,1) at exit1+0x98 sys/kern/kern_exit.c:138 sys_exit(ffff80002123c018,ffff80002129de10,ffff80002129de60) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002129dee0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002129dee0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffde140, count: -12