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| author | Baokun Li <libaokun1@huawei.com> | 2024-03-19 19:33:23 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2024-05-02 23:48:31 -0400 |
| commit | 9a9f3a9842927e4af7ca10c19c94dad83bebd713 (patch) | |
| tree | 8991341047e6829e7263a58a8b2fad8f3ddbab3b /fs/ext4 | |
| parent | 63bfe841053f8dda09c9d059d543486d9dc16104 (diff) | |
| download | linux-9a9f3a9842927e4af7ca10c19c94dad83bebd713.tar.gz linux-9a9f3a9842927e4af7ca10c19c94dad83bebd713.tar.bz2 linux-9a9f3a9842927e4af7ca10c19c94dad83bebd713.zip | |
ext4: set type of ac_groups_linear_remaining to __u32 to avoid overflow
Now ac_groups_linear_remaining is of type __u16 and s_mb_max_linear_groups
is of type unsigned int, so an overflow occurs when setting a value above
65535 through the mb_max_linear_groups sysfs interface. Therefore, the
type of ac_groups_linear_remaining is set to __u32 to avoid overflow.
Fixes: 196e402adf2e ("ext4: improve cr 0 / cr 1 group scanning")
CC: stable@kernel.org
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240319113325.3110393-8-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/mballoc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index 56938532b4ce..7bfc5fb5a128 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -193,8 +193,8 @@ struct ext4_allocation_context { ext4_grpblk_t ac_orig_goal_len; __u32 ac_flags; /* allocation hints */ + __u32 ac_groups_linear_remaining; __u16 ac_groups_scanned; - __u16 ac_groups_linear_remaining; __u16 ac_found; __u16 ac_cX_found[EXT4_MB_NUM_CRS]; __u16 ac_tail; |