panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *160597 61777 0 0 0x4000000 0K syz-executor 399884 63608 0 0 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e4c13) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8075b0f670,8000,fffffd807f7d3548,ffff8000371cf700) at ffs_inode_alloc+0x96c sys/ufs/ffs/ffs_alloc.c:404 ufs_makeinode(8000,fffffd807b6498a0,ffff8000371cfa38,ffff8000371cfa68) at ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1728 ufs_create(ffff8000371cf7b0) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd807b6498a0,ffff8000371cfa38,ffff8000371cfa68,ffff8000371cf838) at VOP_CREATE+0xff sys/kern/vfs_vops.c:103 vn_open(ffff8000371cfa08,70f,0) at vn_open+0x491 sys/kern/vfs_vnops.c:116 doopenat(ffff8000ffffb6e8,ffffff9c,20000040,70e,0,ffff8000371cfbb0) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff8000371cfc60) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371cfc60) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x24ebd7a91c0, count: 5 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: ffs_valloc: dup alloc ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e4c13) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8075b0f670,8000,fffffd807f7d3548,ffff8000371cf700) at ffs_inode_alloc+0x96c sys/ufs/ffs/ffs_alloc.c:404 ufs_makeinode(8000,fffffd807b6498a0,ffff8000371cfa38,ffff8000371cfa68) at ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1728 ufs_create(ffff8000371cf7b0) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd807b6498a0,ffff8000371cfa38,ffff8000371cfa68,ffff8000371cf838) at VOP_CREATE+0xff sys/kern/vfs_vops.c:103 vn_open(ffff8000371cfa08,70f,0) at vn_open+0x491 sys/kern/vfs_vnops.c:116 doopenat(ffff8000ffffb6e8,ffffff9c,20000040,70e,0,ffff8000371cfbb0) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff8000371cfc60) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371cfc60) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x24ebd7a91c0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000371cf490 rbx 0xffffffff834c6d87 cpu_info_full_primary+0x2d87 rdx 0xffff800001241ec0 rcx 0xffff8000ffffb6e8 rax 0xffffffff834c5ff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0xf41122f32328c4f1 r11 0x960309832868798d r12 0xffffffff834c6b88 cpu_info_full_primary+0x2b88 r13 0 r14 0 r15 0x1 rip 0xffffffff822b5f95 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371cf480 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=160597 pid=61777 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffaa40,0xffff8000ffffa540 process=0xffff80002a02e8d8 user=0xffff8000371ca000, vmspace=0xfffffd8075f87008 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52732 187733 91847 0 2 0 syz-executor 52732 270488 91847 0 3 0x4000080 fsleep syz-executor 61777 354663 3294 0 2 0 syz-executor *61777 160597 3294 0 7 0x4000000 syz-executor 63608 399884 35288 0 7 0 syz-executor 63608 473012 35288 0 3 0x4000080 kqread syz-executor 63608 75055 35288 0 2 0x4000000 syz-executor 45256 437456 88221 0 2 0 syz-executor 45256 238711 88221 0 3 0x4000080 ttyin syz-executor 45256 348684 88221 0 2 0x4000000 syz-executor 45256 72690 88221 0 3 0x4000080 fsleep syz-executor 73974 470292 90726 0 2 0 syz-executor 73974 11309 90726 0 3 0x4000080 fsleep syz-executor 73974 521792 90726 0 3 0x4000080 fsleep syz-executor 42592 3701 30315 0 3 0x82 nanoslp syz-executor 88221 453268 30315 0 3 0x82 nanoslp syz-executor 91847 11289 30315 0 3 0x82 nanoslp syz-executor 35288 164922 30315 0 3 0x82 nanoslp syz-executor 90726 375012 30315 0 3 0x82 nanoslp syz-executor 3294 331943 30315 0 2 0x482 syz-executor 73748 464020 0 0 3 0x14200 bored sosplice 30315 415565 76007 0 3 0x82 wait syz-executor 76007 267624 96928 0 3 0x10008a sigsusp ksh 96928 294483 17327 0 3 0x98 kqread sshd-session 17327 269181 99878 0 3 0x92 kqread sshd-session 45943 420603 1 0 3 0x100083 ttyin getty 99878 223349 1 0 3 0x88 kqread sshd 86656 69402 86806 74 3 0x1100092 bpf pflogd 86806 298731 1 0 3 0x80 sbwait pflogd 68612 418406 86703 73 3 0x1100090 kqread syslogd 86703 29215 1 0 3 0x100082 sbwait syslogd 78333 307407 1 0 3 0x100080 kqread resolvd 70521 413523 64802 77 3 0x100092 kqread dhcpleased 20911 20221 64802 77 3 0x100092 kqread dhcpleased 64802 238199 1 0 3 0x80 kqread dhcpleased 4648 345469 0 0 3 0x14200 bored smr 95794 157669 0 0 2 0x14200 zerothread 70701 42258 0 0 3 0x14200 aiodoned aiodoned 41763 155986 0 0 3 0x14200 syncer update 20876 47290 0 0 3 0x14200 cleaner cleaner 71919 131248 0 0 3 0x14200 reaper reaper 8151 418743 0 0 3 0x14200 pgdaemon pagedaemon 13789 284504 0 0 3 0x14200 bored viomb 18698 147938 0 0 3 0x40014200 acpi0 acpi0 89022 386237 0 0 3 0x40014200 idle1 46982 413004 0 0 3 0x14200 bored softnet3 12524 301235 0 0 3 0x14200 bored softnet2 41370 354823 0 0 3 0x14200 bored softnet1 92138 273989 0 0 3 0x14200 bored softnet0 50712 84697 0 0 3 0x14200 bored systqmp 43146 503953 0 0 3 0x14200 bored systq 20285 520688 0 0 3 0x14200 tmoslp softclockmp 99919 108109 0 0 2 0x40014200 softclock 71612 442315 0 0 3 0x40014200 idle0 1 151501 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 61777 (syz-executor) thread 0xffff8000ffffb6e8 (160597) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835d3e38) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 biowait+0xc1 sys/kern/vfs_bio.c:1254 #5 ffs_vget+0x283 sys/ufs/ffs/ffs_vfsops.c:1247 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1728 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xff sys/kern/vfs_vops.c:103 #10 vn_open+0x491 sys/kern/vfs_vnops.c:116 #11 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8075b0fa38) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:120 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1728 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xff sys/kern/vfs_vops.c:103 #10 vn_open+0x491 sys/kern/vfs_vnops.c:116 #11 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8075b0f708) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f4 sys/kern/vfs_vnops.c:107 #8 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #9 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #9 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 10101K 10486K 166960K 11765 0 pcb 17 12K 12K 166960K 66 0 rtable 241 7K 7K 166960K 637 0 pf 35 17K 25K 166960K 67 0 ifaddr 43 7K 7K 166960K 80 0 ifgroup 55 2K 2K 166960K 90 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 80 0 ioctlops 0 0K 4K 166960K 1580 0 iov 1 0K 12K 166960K 26 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1436 90K 90K 166960K 1739 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 9 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 85K 166960K 537 0 sigio 0 0K 0K 166960K 6 0 proc 73 103K 128K 166960K 783 0 subproc 104 6K 6K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 34 0 in_multi 99 7K 7K 166960K 203 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 513 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 227 72K 91K 166960K 6154 0 UVM aobj 8 2K 2K 166960K 9 0 pinsyscall 41 82K 100K 166960K 1819 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 29 0 NDP 12 0K 1K 166960K 52 0 temp 52 6818K 7072K 166960K 20205 0 kqueue 13 20K 30K 166960K 67 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 73 0 69 1 0 1 1 0 8 0 rtentry 112 212 0 100 4 0 4 4 0 8 0 unpcb 144 262 0 241 3 1 2 2 0 8 1 syncache 336 5 0 5 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 808 106 0 98 3 1 2 2 0 8 1 arp 120 36 0 18 1 0 1 1 0 8 0 inpcb 336 451 0 438 7 5 2 7 0 8 0 nd6 136 52 0 25 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 pfstscr 40 3 0 3 2 1 1 1 0 8 1 pffrag 232 7 0 4 1 0 1 1 0 482 0 pffrnode 88 7 0 4 1 0 1 1 0 8 0 pffrent 40 13 0 10 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 47 0 14 1 0 1 1 0 8 0 pfstkey 128 179 0 146 2 0 2 2 0 8 0 pfstate 376 112 0 80 4 0 4 4 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 856 0 396 30 1 29 29 0 8 0 art_table 32 858 0 396 4 0 4 4 0 8 0 art_node 16 211 0 109 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 1 1 0 1 1 0 8 0 semapl 112 8 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2047 0 524 96 0 96 96 0 8 0 ffsino 272 2048 0 525 102 0 102 102 0 8 0 nchpl 144 2671 0 975 64 0 64 64 0 8 0 uvmvnodes 80 2460 0 0 51 0 51 51 0 8 0 vnodes 216 2460 0 0 137 0 137 137 0 8 0 namei 1024 9579 0 9578 3 2 1 2 0 8 0 percpumem 16 54 0 8 1 0 1 1 0 8 0 kstatmem 264 40 0 16 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 10363 0 10363 10 2 8 8 1 8 8 plimitpl 152 69 0 52 1 0 1 1 0 8 0 sigapl 424 822 0 773 8 2 6 7 0 8 0 futexpl 64 4637 0 4633 2 1 1 1 0 8 0 knotepl 120 539 0 0 17 0 17 17 0 8 0 kqueuepl 216 156 0 82 5 0 5 5 0 8 0 pipepl 320 236 0 209 8 4 4 8 0 8 1 fdescpl 496 802 0 772 6 1 5 5 0 8 0 filepl 152 4133 0 3809 18 5 13 16 0 8 0 lockfpl 104 130 0 128 1 0 1 1 0 8 0 lockfspl 48 56 0 54 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 50 0 33 1 0 1 1 0 8 0 ucredpl 104 355 0 342 1 0 1 1 0 8 0 zombiepl 144 776 0 773 1 0 1 1 0 8 0 processpl 1160 822 0 773 5 1 4 5 0 8 0 procpl 648 1349 0 1291 8 2 6 7 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 6 0 6 1 1 0 1 0 8 0 sockpl 664 795 0 757 10 5 5 9 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 241 0 0 31 0 31 31 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 289 0 0 17 0 17 17 0 8 0 bufpl 280 5457 0 106 383 0 383 383 0 8 0 anonpl 24 189813 0 186422 53 2 51 51 0 185 22 amapchunkpl 152 19764 0 19292 31 0 31 31 0 158 9 amappl16 200 4799 0 4781 17 3 14 14 0 8 11 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 134 0 122 1 0 1 1 0 8 0 amappl13 176 14 0 14 2 2 0 1 0 8 0 amappl12 168 1570 0 1540 3 1 2 2 0 8 0 amappl11 160 63 0 49 1 0 1 1 0 8 0 amappl10 152 18 0 18 1 1 0 1 0 8 0 amappl9 144 141 0 141 1 1 0 1 0 8 0 amappl8 136 25 0 21 1 0 1 1 0 8 0 amappl7 128 122 0 110 1 0 1 1 0 8 0 amappl6 120 238 0 236 1 0 1 1 0 8 0 amappl5 112 168 0 156 1 0 1 1 0 8 0 amappl4 104 343 0 323 1 0 1 1 0 8 0 amappl3 96 3603 0 3508 4 1 3 4 0 8 0 amappl2 88 1063 0 985 2 0 2 2 0 8 0 amappl1 80 9575 0 8995 16 1 15 15 0 8 0 amappl 88 5702 0 5537 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 128 253 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 24 802 0 772 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 802 0 772 1 0 1 1 0 8 0 vmmpekpl 168 8947 0 8899 3 0 3 3 0 8 0 vmmpepl 168 57834 0 56005 98 3 95 95 0 357 8 vmsppl 440 801 0 772 6 2 4 5 0 8 0 rwobjpl 56 22810 0 19418 52 0 52 52 0 8 3 pdppl 4096 1611 0 1544 101 28 73 81 0 8 6 pvpl 32 27620 0 0 223 0 223 223 0 265 0 pmappl 248 801 0 772 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 404 0 41 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e4c13) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8075b0f670,8000,fffffd807f7d3548,ffff8000371cf700) at ffs_inode_alloc+0x96c sys/ufs/ffs/ffs_alloc.c:404 ufs_makeinode(8000,fffffd807b6498a0,ffff8000371cfa38,ffff8000371cfa68) at ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1728 ufs_create(ffff8000371cf7b0) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd807b6498a0,ffff8000371cfa38,ffff8000371cfa68,ffff8000371cf838) at VOP_CREATE+0xff sys/kern/vfs_vops.c:103 vn_open(ffff8000371cfa08,70f,0) at vn_open+0x491 sys/kern/vfs_vnops.c:116 doopenat(ffff8000ffffb6e8,ffffff9c,20000040,70e,0,ffff8000371cfbb0) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff8000371cfc60) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371cfc60) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x24ebd7a91c0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x7a8f1ca217c0, count: 12 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x7a8f1ca217c0, count: -3