sst-linux/kernel/printk
Kuan-Wei Chiu 9a6d43844d printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX
[ Upstream commit 3d6f83df8ff2d5de84b50377e4f0d45e25311c7a ]

Shifting 1 << 31 on a 32-bit int causes signed integer overflow, which
leads to undefined behavior. To prevent this, cast 1 to u32 before
performing the shift, ensuring well-defined behavior.

This change explicitly avoids any potential overflow by ensuring that
the shift occurs on an unsigned 32-bit integer.

Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Acked-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240928113608.1438087-1-visitorckw@gmail.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-02-21 13:49:30 +01:00
..
braille.c
braille.h
console_cmdline.h
index.c
internal.h
Makefile
printk_ringbuffer.c
printk_ringbuffer.h
printk_safe.c printk: Consolidate console deferred printing 2023-09-23 11:11:07 +02:00
printk.c printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX 2025-02-21 13:49:30 +01:00
sysctl.c