ubsan: some error report during boot

ubsan: some error report during boot

[Xishi Qiu]

I got some error report during boot from ubsan,
kernel version is v4.12


[    0.001000] ================================================================================
[    0.001000] UBSAN: Undefined behaviour in arch/x86/kernel/apic/apic_flat_64.c:49:11
[    0.001000] shift exponent 64 is too large for 64-bit type 'long unsigned int'
[    0.001000] CPU: 64 PID: 0 Comm: swapper/64 Not tainted 4.12.0-rc3-327.44.58.18.x86_64+ #30
[    0.001000] Hardware name: Huawei Technologies Co., Ltd. RH8100 V3/BC61PBIA, BIOS BLHSV028 11/11/2014
[    0.001000] Call Trace:
[    0.001000]  dump_stack+0xbc/0x124
[    0.001000]  ? _atomic_dec_and_lock+0x14c/0x14c
[    0.001000]  ubsan_epilogue+0xd/0x4e
[    0.001000]  __ubsan_handle_shift_out_of_bounds+0x1fb/0x254
[    0.001000]  ? __ubsan_handle_load_invalid_value+0x15b/0x15b
[    0.001000]  ? set_pte_vaddr+0x5f/0x90
[    0.001000]  ? __native_set_fixmap+0x29/0x70
[    0.001000]  ? native_set_fixmap+0x60/0x70
[    0.001000]  ? cpu_init+0x537/0xac0
[    0.001000]  flat_init_apic_ldr+0xda/0x120
[    0.001000]  ? flat_init_apic_ldr+0xda/0x120
[    0.001000]  setup_local_APIC+0xef/0x810
[    0.001000]  apic_ap_setup+0xe/0x20
[    0.001000]  start_secondary+0x112/0x370
[    0.001000]  ? set_cpu_sibling_map+0x1970/0x1970
[    0.001000]  secondary_startup_64+0x9f/0x9f
[    0.001000] ================================================================================



[   47.146515] ================================================================================
[   47.146519] UBSAN: Undefined behaviour in drivers/scsi/megaraid/megaraid_sas_fp.c:127:32
[   47.146522] index 255 is out of range for type 'MR_LD_SPAN_MAP [1]'
[   47.146529] CPU: 193 PID: 2435 Comm: systemd-udevd Not tainted 4.12.0-rc3-327.44.58.18.x86_64+ #30
[   47.146531] Hardware name: Huawei Technologies Co., Ltd. RH8100 V3/BC61PBIA, BIOS BLHSV028 11/11/2014
[   47.146534] Call Trace:
[   47.146554]  dump_stack+0xbc/0x124
[   47.146559]  ? _atomic_dec_and_lock+0x14c/0x14c
[   47.146569]  ubsan_epilogue+0xd/0x4e
[   47.146574]  __ubsan_handle_out_of_bounds+0x106/0x14d
[   47.146578]  ? __ubsan_handle_shift_out_of_bounds+0x254/0x254
[   47.146586]  ? usleep_range+0x110/0x110
[   47.146596]  ? memcpy+0x45/0x50
[   47.146614]  ? MR_PopulateDrvRaidMap+0x5d5/0x820 [megaraid_sas]
[   47.146630]  mr_update_load_balance_params+0x165/0x1c0 [megaraid_sas]
[   47.146645]  MR_ValidateMapInfo+0x218/0xc60 [megaraid_sas]
[   47.146661]  ? megasas_get_ctrl_info+0x3f1/0xdb0 [megaraid_sas]
[   47.146668]  ? __list_del_entry_valid+0x77/0x130
[   47.146683]  ? megasas_return_cmd+0xa5/0x3c0 [megaraid_sas]
[   47.146697]  ? megasas_get_cmd+0x2e0/0x2e0 [megaraid_sas]
[   47.146712]  ? wait_and_poll+0x7e/0x160 [megaraid_sas]
[   47.146727]  megasas_get_map_info+0x26d/0x380 [megaraid_sas]
[   47.146742]  megasas_init_adapter_fusion+0xaa4/0xe50 [megaraid_sas]
[   47.146757]  ? megasas_sync_map_info+0x430/0x430 [megaraid_sas]
[   47.146761]  ? kasan_kmalloc+0xad/0xe0
[   47.146765]  ? kmem_cache_alloc_trace+0x11a/0x320
[   47.146779]  ? megasas_init_fw+0x475/0x1b50 [megaraid_sas]
[   47.146794]  megasas_init_fw+0x500/0x1b50 [megaraid_sas]
[   47.146808]  ? megasas_resume+0x9c0/0x9c0 [megaraid_sas]
[   47.146819]  ? dma_generic_alloc_coherent+0x1a5/0x230
[   47.146825]  ? __init_waitqueue_head+0x9d/0x100
[   47.146828]  ? put_prev_task_stop+0x310/0x310
[   47.146843]  megasas_probe_one.part.19+0xfe2/0x2890 [megaraid_sas]
[   47.146857]  ? megasas_init_fw+0x1b50/0x1b50 [megaraid_sas]
[   47.146862]  ? save_stack_trace+0x1b/0x20
[   47.146866]  ? save_stack+0x46/0xd0
[   47.146869]  ? kasan_slab_free+0x70/0xc0
[   47.146872]  ? kfree+0xd8/0x350
[   47.146878]  ? acpi_pci_irq_enable+0x283/0x440
[   47.146885]  ? pcibios_enable_device+0x4a/0x60
[   47.146890]  ? do_pci_enable_device+0x164/0x240
[   47.146893]  ? pci_enable_device_flags+0x229/0x2d0
[   47.146896]  ? pci_enable_device_mem+0x13/0x20
[   47.146909]  ? megasas_probe_one+0x8e/0x150 [megaraid_sas]
[   47.146912]  ? local_pci_probe+0x95/0x120
[   47.146915]  ? pci_device_probe+0x2dc/0x3f0
[   47.146921]  ? driver_probe_device+0x36a/0x910
[   47.146924]  ? __driver_attach+0x139/0x180
[   47.146927]  ? bus_for_each_dev+0xfb/0x180
[   47.146929]  ? bus_add_driver+0x29b/0x4a0
...