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initrd: Replace simple_strtol with kstrtoint to improve ramdisk_start_setup 

Replace simple_strtol() with the recommended kstrtoint() for parsing the
'ramdisk_start=' boot parameter. Unlike simple_strtol(), which returns a
a long, kstrtoint() converts the string directly to an integer and
avoids implicit casting.

Check the return value of kstrtoint() and reject invalid values. This
adds error handling while preserving existing behavior for valid values,
and removes use of the deprecated simple_strtol() helper.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Thorsten Blum 2025-09-18 18:24:47 +02:00 committed by Christian Brauner
parent 3a86608788
commit b2c43efc3c
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1 changed files with 1 additions and 2 deletions
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3
init/do_mounts_rd.c
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@ -29,8 +29,7 @@ int __initdata rd_image_start; /* starting block # of image */
static int __init ramdisk_start_setup(char *str) static int __init ramdisk_start_setup(char *str)
{ {
rd_image_start = simple_strtol(str,NULL,0); return kstrtoint(str, 0, &rd_image_start) == 0;
return 1;
} }
__setup("ramdisk_start=", ramdisk_start_setup); __setup("ramdisk_start=", ramdisk_start_setup);