> Tried 4.10 on a PC with Ahlon64 X2 CPU and Asun M2N-E maiboard and got > this UBSAN warning that was not here with 4.9: > > [ 0.217716] ================================================================================ > [ 0.217950] UBSAN: Undefined behaviour in drivers/acpi/sysfs.c:757:33 > [ 0.218082] shift exponent 64 is too large for 64-bit type 'long long unsigned int' > [ 0.218316] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.10.0 #18 > [ 0.218446] Hardware name: System manufacturer System Product Name/M2N-E, BIOS ASUS M2N-E ACPI BIOS Revision 1703 01/25/2010 > [ 0.218684] Call Trace: > [ 0.218815] ? dump_stack+0x47/0x6c > [ 0.218943] ? ubsan_epilogue+0x9/0x40 > [ 0.219071] ? __ubsan_handle_shift_out_of_bounds+0x124/0x160 > [ 0.219203] ? ktime_get+0x4d/0xf0 > [ 0.219332] ? wakeup_source_add+0x60/0x100 > [ 0.219462] ? acpi_gpe_apply_masked_gpes+0x3c/0x7d > [ 0.219592] ? acpi_scan_init+0x261/0x287 > [ 0.219721] ? acpi_init+0x2f3/0x343 > [ 0.219849] ? acpi_sleep_proc_init+0x22/0x22 > [ 0.219979] ? do_one_initcall+0x56/0x1f0 > [ 0.220000] ? kernel_init_freeable+0x245/0x2d2 > [ 0.220000] ? rest_init+0x70/0x70 > [ 0.220000] ? kernel_init+0x6/0x110 > [ 0.220000] ? rest_init+0x70/0x70 > [ 0.220000] ? ret_from_fork+0x23/0x30 > [ 0.220000] > ================================================================================ And the same happens on Sun Ultra 20 Opteron workstation, with a slightly different backtrace: [ 0.196897] ================================================================================ [ 0.196927] UBSAN: Undefined behaviour in drivers/acpi/sysfs.c:757:33 [ 0.196946] shift exponent 64 is too large for 64-bit type 'long long unsigned int' [ 0.196977] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.10.0-09686-g9e314890292c #21 [ 0.197004] Hardware name: Sun Microsystems Sun Ultra 20 Workstation/2864, BIOS 2.3.0 05/15/2008 [ 0.197032] Call Trace: [ 0.197056] ? dump_stack+0x47/0x65 [ 0.197075] ? ubsan_epilogue+0x9/0x40 [ 0.197093] ? __ubsan_handle_shift_out_of_bounds+0xf8/0x140 [ 0.197112] ? __kmalloc_track_caller+0xb4/0x230 [ 0.197131] ? ktime_get+0x4d/0xf0 [ 0.197149] ? wakeup_source_add+0x82/0x110 [ 0.197169] ? acpi_gpe_apply_masked_gpes+0x3c/0x7d [ 0.197187] ? acpi_scan_init+0x261/0x287 [ 0.197204] ? acpi_init+0x2f3/0x343 [ 0.197222] ? acpi_sleep_proc_init+0x22/0x22 [ 0.197240] ? do_one_initcall+0x46/0x1d0 [ 0.197260] ? kernel_init_freeable+0x245/0x2d2 [ 0.197279] ? rest_init+0x80/0x80 [ 0.197296] ? kernel_init+0x6/0x110 [ 0.197313] ? rest_init+0x80/0x80 [ 0.197330] ? ret_from_fork+0x23/0x30 [ 0.197346] ================================================================================ -- Meelis Roos <mroos@xxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
