login: uvm_fault(0xffffffff828908a8, 0xffff80012a2895b0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffffff828908a8, 0xffff80012a2895b0, 0, 1) -> e spllower(ffff8000212a4000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716 end trace frame: 0xffff8000234aeee0, count: 0 ddb{1}> trace spllower(ffff8000212a4000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716 single_thread_check_locked(ffff80002128ef78,0) at single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970 userret(ffff80002128ef78) at userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline] userret(ffff80002128ef78) at userret+0x335 sys/kern/kern_sig.c:1936 syscall(ffff8000234af010) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff8000234af010) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcaa3c7ac670, count: -5 ddb{1}> show registers rdi 0xffff8000212a4000 rsi 0x9a7 rbp 0xffff8000234aee80 rbx 0x1000 __ALIGN_SIZE rdx 0xffff8000212a4000 rcx 0x9a6 rax 0x212a4000 r8 0xffffffff81210e00 setrunnable+0xa0 r9 0x5 r10 0x70694e3154f05aea r11 0xf418a9493775d047 r12 0xffff800020d68ff0 r13 0x1 r14 0x212a4000 r15 0xffff80002128ef78 rip 0xffffffff81cfb0a4 spllower+0x34 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000234aee30 ss 0x10 spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx ddb{1}> show proc PROC (syz-executor.0) pid=104233 stat=onproc flags process=1010 proc=4080000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002128fc48,0xffffffff828bf580 process=0xffff8000ffff8848 user=0xffff8000234aa000, vmspace=0xfffffd806ea5fa18 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56718 292424 77462 32767 7 0x3010 syz-executor.0 *56718 104233 77462 32767 7 0x4081010 syz-executor.0 77462 377054 85793 32767 3 0x90 nanosleep syz-executor.0 85793 45136 72989 0 3 0x82 wait syz-executor.0 72989 306870 37900 0 3 0x82 thrsleep syz-fuzzer 72989 213559 37900 0 3 0x4000082 nanosleep syz-fuzzer 72989 312856 37900 0 3 0x4000082 thrsleep syz-fuzzer 72989 90661 37900 0 3 0x4000082 nanosleep syz-fuzzer 72989 8279 37900 0 3 0x4000082 thrsleep syz-fuzzer 72989 523712 37900 0 3 0x4000082 thrsleep syz-fuzzer 72989 153693 37900 0 3 0x4000082 thrsleep syz-fuzzer 72989 260512 37900 0 3 0x4000082 kqread syz-fuzzer 37900 381530 74340 0 3 0x10008a pause ksh 74340 325281 62036 0 3 0x92 select sshd 17406 201744 1 0 3 0x100083 ttyin getty 62036 21628 1 0 3 0x80 select sshd 34827 8688 89374 73 3 0x100090 kqread syslogd 89374 285693 1 0 3 0x100082 netio syslogd 37817 105299 1 77 3 0x100090 poll dhclient 6017 460590 1 0 3 0x80 poll dhclient 76334 118807 0 0 3 0x14200 bored smr 48959 393932 0 0 3 0x14200 pgzero zerothread 37069 440642 0 0 3 0x14200 aiodoned aiodoned 41921 470826 0 0 3 0x14200 syncer update 62521 12005 0 0 3 0x14200 cleaner cleaner 24157 81725 0 0 3 0x14200 reaper reaper 93135 462238 0 0 3 0x14200 pgdaemon pagedaemon 29052 80088 0 0 3 0x14200 bored crynlk 72504 346218 0 0 3 0x14200 bored crypto 66327 170676 0 0 3 0x14200 bored viomb 73542 511299 0 0 3 0x40014200 acpi0 acpi0 52759 100392 0 0 3 0x40014200 idle1 84169 428160 0 0 3 0x14200 bored softnet 44254 437745 0 0 3 0x14200 bored systqmp 57597 471000 0 0 3 0x14200 bored systq 78631 250509 0 0 3 0x40014200 bored softclock 64375 7410 0 0 3 0x40014200 idle0 1 225784 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 56718 (syz-executor.0) thread 0xffff80002128ef78 (104233) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828b4200) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9472 6346K 6346K 78643K 10562 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 153 0 ifaddr 32 8K 8K 78643K 32 0 counters 41 33K 33K 78643K 41 0 ioctlops 0 0K 2K 78643K 14 0 mount 1 1K 1K 78643K 1 0 vnodes 1199 75K 75K 78643K 1204 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 4 12K 16K 78643K 19 0 proc 48 50K 70K 78643K 325 0 subproc 17 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 295 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 60 11K 12K 78643K 616 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 6 0K 0K 78643K 6 0 temp 40 3958K 4021K 78643K 1668 0 kqueue 3 4K 4K 78643K 3 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 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 23 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 28 0 22 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 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 1412 0 21 87 0 87 87 0 8 0 ffsino 272 1412 0 21 93 0 93 93 0 8 0 nchpl 144 1627 0 36 59 0 59 59 0 8 0 uvmvnodes 72 1438 0 0 27 0 27 27 0 8 0 vnodes 208 1438 0 0 76 0 76 76 0 8 0 namei 1024 3829 0 3829 1 0 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 216 4763 0 4763 2 1 1 2 0 8 1 plimitpl 152 14 0 7 1 0 1 1 0 8 0 sigapl 424 212 0 182 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 69 0 61 1 0 1 1 0 8 0 fdescpl 496 196 0 182 2 0 2 2 0 8 0 filepl 152 921 0 849 3 0 3 3 0 8 0 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 16 0 7 1 0 1 1 0 8 0 pgrppl 48 16 0 7 1 0 1 1 0 8 0 ucredpl 96 51 0 43 1 0 1 1 0 8 0 zombiepl 144 182 0 182 1 0 1 1 0 8 1 processpl 1056 212 0 182 4 1 3 3 0 8 1 procpl 656 220 0 182 4 0 4 4 0 8 0 sockpl 400 68 0 52 2 0 2 2 0 8 0 mcl4k 4096 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 74 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 100 0 0 7 0 7 7 0 8 0 bufpl 280 3450 0 173 235 0 235 235 0 8 0 anonpl 16 22365 0 20193 16 2 14 14 0 124 3 amapchunkpl 152 814 0 733 5 0 5 5 0 158 1 amappl16 192 153 0 95 4 0 4 4 0 8 1 amappl15 184 5 0 3 1 0 1 1 0 8 0 amappl14 176 22 0 18 1 0 1 1 0 8 0 amappl13 168 18 0 16 1 0 1 1 0 8 0 amappl12 160 10 0 8 1 0 1 1 0 8 0 amappl11 152 42 0 29 1 0 1 1 0 8 0 amappl10 144 7 0 4 1 0 1 1 0 8 0 amappl9 136 388 0 387 1 0 1 1 0 8 0 amappl8 128 84 0 67 1 0 1 1 0 8 0 amappl7 120 202 0 197 1 0 1 1 0 8 0 amappl6 112 53 0 45 1 0 1 1 0 8 0 amappl5 104 328 0 312 1 0 1 1 0 8 0 amappl4 96 241 0 220 1 0 1 1 0 8 0 amappl3 88 102 0 95 1 0 1 1 0 8 0 amappl2 80 851 0 793 2 0 2 2 0 8 0 amappl1 72 13356 0 12900 22 4 18 18 0 8 8 amappl 80 419 0 388 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 24 196 0 182 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 196 0 182 1 0 1 1 0 8 0 vmmpekpl 168 5715 0 5697 1 0 1 1 0 8 0 vmmpepl 168 29750 0 28605 78 5 73 73 0 357 23 vmsppl 368 195 0 182 2 0 2 2 0 8 0 pdppl 4096 399 0 364 47 10 37 37 0 8 2 pvpl 32 108668 0 103623 117 0 117 117 0 265 75 pmappl 232 195 0 182 1 0 1 1 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 267 0 12 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff826f9ff0) 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(ffffffff828b3ff8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b3ff8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828b3ff8,1) 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(ffff8000234a9a80,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 single_thread_set(ffff80002128fc48,3,0) at single_thread_set+0x3f4 single_thread_wait sys/kern/kern_sig.c:2112 [inline] single_thread_set(ffff80002128fc48,3,0) at single_thread_set+0x3f4 sys/kern/kern_sig.c:2092 exit1(ffff80002128fc48,0,0,1) at exit1+0x98 sys/kern/kern_exit.c:138 sys_exit(ffff80002128fc48,ffff8000234a9bc0,ffff8000234a9c10) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000234a9c90) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234a9c90) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff23f0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx ddb{1}> trace spllower(ffff8000212a4000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716 single_thread_check_locked(ffff80002128ef78,0) at single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970 userret(ffff80002128ef78) at userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline] userret(ffff80002128ef78) at userret+0x335 sys/kern/kern_sig.c:1936 syscall(ffff8000234af010) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff8000234af010) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcaa3c7ac670, count: -5