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| author | Lukas Czerner <lczerner@redhat.com> | 2022-01-19 14:02:09 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2022-02-03 10:57:44 -0500 |
| commit | 7c268d4ce2d3761f666a9950b029c8902bfab710 (patch) | |
| tree | fb0739349fdd94bc701740fa59cf79a79727410b /fs/ext4 | |
| parent | 4f98186848707f530669238d90e0562d92a78aab (diff) | |
| download | linux-7c268d4ce2d3761f666a9950b029c8902bfab710.tar.gz linux-7c268d4ce2d3761f666a9950b029c8902bfab710.tar.bz2 linux-7c268d4ce2d3761f666a9950b029c8902bfab710.zip | |
ext4: fix potential NULL pointer dereference in ext4_fill_super()
By mistake we fail to return an error from ext4_fill_super() in case
that ext4_alloc_sbi() fails to allocate a new sbi. Instead we just set
the ret variable and allow the function to continue which will later
lead to a NULL pointer dereference. Fix it by returning -ENOMEM in the
case ext4_alloc_sbi() fails.
Fixes: cebe85d570cf ("ext4: switch to the new mount api")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Link: https://lore.kernel.org/r/20220119130209.40112-1-lczerner@redhat.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 57914acc5402..d1c4b04e72ab 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5541,7 +5541,7 @@ static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) sbi = ext4_alloc_sbi(sb); if (!sbi) - ret = -ENOMEM; + return -ENOMEM; fc->s_fs_info = sbi; |