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| author | Theodore Ts'o <tytso@mit.edu> | 2013-04-22 04:56:32 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-04-22 04:56:32 +0200 |
| commit | 3f8a6411fbada1fa482276591e037f3b1adcf55b (patch) | |
| tree | 1ed53f3cd7e298876f5d8c81c261528ebbe077de /fs/ext4/resize.c | |
| parent | ext4: fix Kconfig documentation for CONFIG_EXT4_DEBUG (diff) | |
| download | linux-3f8a6411fbada1fa482276591e037f3b1adcf55b.tar.xz linux-3f8a6411fbada1fa482276591e037f3b1adcf55b.zip | |
ext4: add check for inodes_count overflow in new resize ioctl
Addresses-Red-Hat-Bugzilla: #913245
Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/ext4/resize.c')
| -rw-r--r-- | fs/ext4/resize.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 08d2312c0fd4..b27c96d01965 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -1882,6 +1882,10 @@ retry: return 0; n_group = ext4_get_group_number(sb, n_blocks_count - 1); + if (n_group > (0xFFFFFFFFUL / EXT4_INODES_PER_GROUP(sb))) { + ext4_warning(sb, "resize would cause inodes_count overflow"); + return -EINVAL; + } ext4_get_group_no_and_offset(sb, o_blocks_count - 1, &o_group, &offset); n_desc_blocks = num_desc_blocks(sb, n_group + 1); |