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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-17 09:30:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-17 09:30:42 -0700 |
| commit | 3d1f95267769caf5c3eb71a2c9586213ea0a3ef2 (patch) | |
| tree | dc0c9f9454152051dfb5daffe9d7010ed2646b4f | |
| parent | cd051cfe1e35a471fc2cdf6d32fae6ee23305ecb (diff) | |
| parent | 9d7ed813ee5ff0d469bd99630828ed6fdef4e8da (diff) | |
Merge tag 'vfs-7.3-rc1.fat' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull FAT update from Christian Brauner:
"This rejects names longer than NAME_MAX in msdos_format_name().
The VFS only enforces PATH_MAX rather than the length of an individual
component. open() on such a path component reported success for a name
far longer than NAME_MAX"
* tag 'vfs-7.3-rc1.fat' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
fat: reject name longer than NAME_MAX in msdos_format_name()
| -rw-r--r-- | fs/fat/namei_msdos.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index 0fd2971ad4b1..c93e05d35ef8 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -29,6 +29,9 @@ static int msdos_format_name(const unsigned char *name, int len, unsigned char c; int space; + if (len > NAME_MAX) + return -ENAMETOOLONG; + if (name[0] == '.') { /* dotfile because . and .. already done */ if (opts->dotsOK) { /* Get rid of dot - test for it elsewhere */ |