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Commit d533df07 authored by Namjae Jeon's avatar Namjae Jeon Committed by Linus Torvalds
Browse files

fat: fix bug in enforcing Long File Name length 



Since '*outlen' is initialized to zero, it is currently possible to
create a filename of length (FAT_LFN_LEN + 1) when utf8 is not enabled.
To enforce the FAT_LFN_LEN limit, we must perform one less iteration.

Signed-off-by: default avatarNamjae Jeon <linkinjeon@gmail.com>
Signed-off-by: default avatarRavishankar N <cyberax82@gmail.com>
Acked-by: default avatarOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 41f0c02e

fs/fat/namei_vfat.c

+1 −1
Original line number Diff line number Diff line
@@ -522,7 +522,7 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, 
		op = &outname[*outlen * sizeof(wchar_t)];

	} else {

		for (i = 0, ip = name, op = outname, *outlen = 0;

			 i < len && *outlen <= FAT_LFN_LEN;

			 i < len && *outlen < FAT_LFN_LEN;

			 *outlen += 1) {

			if (escape && (*ip == ':')) {

				if (i > len - 5)