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namespace: Replace simple_strtoul with kstrtoul to parse boot params

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Replace simple_strtoul() with the recommended kstrtoul() for parsing the
'mhash_entries=' and 'mphash_entries=' boot parameters.

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

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20251214153141.218953-2-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
2025-12-14 16:31:42 +01:00
committed by Christian Brauner
parent b29a0a37f4
commit 3f320e5c2e
1 changed files with 2 additions and 8 deletions
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10
fs/namespace.c
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@@ -49,20 +49,14 @@ static unsigned int mp_hash_shift __ro_after_init;
static __initdata unsigned long mhash_entries;
static int __init set_mhash_entries(char *str)
{
if (!str)
return 0;
mhash_entries = simple_strtoul(str, &str, 0);
return 1;
return kstrtoul(str, 0, &mhash_entries) == 0;
}
__setup("mhash_entries=", set_mhash_entries);
static __initdata unsigned long mphash_entries;
static int __init set_mphash_entries(char *str)
{
if (!str)
return 0;
mphash_entries = simple_strtoul(str, &str, 0);
return 1;
return kstrtoul(str, 0, &mphash_entries) == 0;
}
__setup("mphash_entries=", set_mphash_entries);