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| author | Chengguang Xu <cgxu519@gmx.com> | 2018-07-29 15:51:54 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-07-29 15:51:54 -0400 |
| commit | 21ac738ede0b49004b53b4a44fe3df7bb4a78280 (patch) | |
| tree | ed972023ca57033a550f2d2a36a0d5cfea51ddaf /fs/ext4 | |
| parent | 7f144fd046d967ff2fbba59203b42b888ad5aae7 (diff) | |
| download | linux-21ac738ede0b49004b53b4a44fe3df7bb4a78280.tar.bz2 | |
ext4: check allocation failure when duplicating "data" in ext4_remount()
There is no check for allocation failure when duplicating
"data" in ext4_remount(). Check for failure and return
error -ENOMEM in this case.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/super.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 3e64d8d51ac4..d4a218ba626c 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5101,6 +5101,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) #endif char *orig_data = kstrdup(data, GFP_KERNEL); + if (data && !orig_data) + return -ENOMEM; + /* Store the original options */ old_sb_flags = sb->s_flags; old_opts.s_mount_opt = sbi->s_mount_opt; |