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| author | Pavel Machek <pavel@suse.cz> | 2009-01-06 14:40:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:12 -0800 |
| commit | e899aa823ad74860a17b541b0ad38f513728923d (patch) | |
| tree | 019c4a1b7baafe9967aa50cc49e809c11d39f944 /lib/vsprintf.c | |
| parent | ff083c8372f6312bb3a8c7f7b748920aeeb210c9 (diff) | |
| download | lwn-e899aa823ad74860a17b541b0ad38f513728923d.tar.gz lwn-e899aa823ad74860a17b541b0ad38f513728923d.zip | |
strict_strto* is not strict enough
It decodes "\n" as 0, which is bad, because stray echo into backlight
will turn your backlight off, etc...
Signed-off-by: Pavel Machek <pavel@suse.cz>
Cc: Yi Yang <yi.y.yang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/vsprintf.c')
| -rw-r--r-- | lib/vsprintf.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 98d632277ca8..0fbd0121d91d 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -170,6 +170,8 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) return -EINVAL; val = simple_strtoul(cp, &tail, base); + if (tail == cp) + return -EINVAL; if ((*tail == '\0') || ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { *res = val; @@ -241,6 +243,8 @@ int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) return -EINVAL; val = simple_strtoull(cp, &tail, base); + if (tail == cp) + return -EINVAL; if ((*tail == '\0') || ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { *res = val; |