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fs, omfs: add NULL terminator in the end up the token list 

commit dcbff39da3d815f08750552fdd04f96b51751129 upstream.

match_token() expects a NULL terminator at the end of the token list so
that it would know where to stop.  Not having one causes it to overrun
to invalid memory.

In practice, passing a mount option that omfs didn't recognize would
sometimes panic the system.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sasha Levin 2015-05-28 15:44:29 -07:00 committed by Greg Kroah-Hartman
parent 0b93bc9d1b
commit f00429f1fb
1 changed files with 2 additions and 1 deletions
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3
fs/omfs/inode.c
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@ -361,7 +361,7 @@ nomem:
}
enum {
Opt_uid, Opt_gid, Opt_umask, Opt_dmask, Opt_fmask
Opt_uid, Opt_gid, Opt_umask, Opt_dmask, Opt_fmask, Opt_err
};
static const match_table_t tokens = {
@ -370,6 +370,7 @@ static const match_table_t tokens = {
{Opt_umask, "umask=%o"},
{Opt_dmask, "dmask=%o"},
{Opt_fmask, "fmask=%o"},
{Opt_err, NULL},
};
static int parse_options(char *options, struct omfs_sb_info *sbi)