UBSAN: Undefined behaviour in ../drivers/cpuidle/governors/menu.c:229:21
From: Randy Dunlap
Date: Fri Feb 22 2019 - 20:07:30 EST
This is 5.0-rc7 on an old Toshiba Portege laptop.
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[ 51.898454] UBSAN: Undefined behaviour in ../drivers/cpuidle/governors/menu.c:229:21
[ 51.898467] signed integer overflow:
[ 51.898478] 3758096350 * 3758096350 cannot be represented in type 'long long int'
[ 51.898496] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B W 5.0.0-rc7mod #3
[ 51.898507] Hardware name: TOSHIBA PORTEGE R835/Portable PC, BIOS Version 4.10 01/08/2013
[ 51.898519] Call Trace:
[ 51.898533] dump_stack+0x7b/0xb5
[ 51.898544] ubsan_epilogue+0xd/0x81
[ 51.898553] handle_overflow+0x198/0x1d7
[ 51.898564] ? __ubsan_handle_negate_overflow+0x195/0x195
[ 51.898575] ? tick_nohz_get_sleep_length+0x121/0x1d0
[ 51.898588] ? ipv6_icmp_error+0x755/0x7f0
[ 51.898597] ? tick_nohz_next_event+0x1b3/0x4a0
[ 51.898607] ? can_stop_idle_tick+0x260/0x260
[ 51.898617] ? __switch_to_asm+0x40/0x70
[ 51.898628] ? calibrate_delay+0x25/0x2341
[ 51.898637] ? __switch_to_asm+0x34/0x70
[ 51.898646] ? common_interrupt+0xa/0xf
[ 51.898658] __ubsan_handle_mul_overflow+0xe/0x1c
[ 51.898669] menu_select+0x13d0/0x1df0
[ 51.898682] ? menu_enable_device+0x170/0x170
[ 51.898691] ? sched_clock+0x9/0x10
[ 51.898701] ? kasan_check_write+0x14/0x20
[ 51.898711] ? rcu_dynticks_eqs_exit+0x2c/0x80
[ 51.898722] cpuidle_select+0x5a/0xa0
[ 51.898732] do_idle+0x2aa/0x3c0
[ 51.898742] ? arch_cpu_idle_exit+0x40/0x40
[ 51.898751] ? kasan_check_read+0x11/0x20
[ 51.898761] ? do_raw_spin_unlock+0x54/0x220
[ 51.898773] cpu_startup_entry+0x18/0x20
[ 51.898782] rest_init+0x165/0x1a0
[ 51.898793] arch_call_rest_init+0x9/0x11
[ 51.898803] start_kernel+0x697/0x6bd
[ 51.898813] ? mem_encrypt_init+0x6/0x6
[ 51.898822] ? load_ucode_intel_bsp+0x53/0x8a
[ 51.898832] ? init_intel_microcode+0x1a4/0x1a4
[ 51.898844] ? load_ucode_bsp+0x1e8/0x21c
[ 51.898854] x86_64_start_reservations+0x24/0x26
[ 51.898865] x86_64_start_kernel+0x74/0x77
[ 51.898874] secondary_startup_64+0xa4/0xb0
[ 51.898887] ================================================================================
--
~Randy