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ext4: set the type of max_zeroout to unsigned int to avoid overflow

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[ Upstream commit 261341a932 ]

The max_zeroout is of type int and the s_extent_max_zeroout_kb is of
type uint, and the s_extent_max_zeroout_kb can be freely modified via
the sysfs interface. When the block size is 1024, max_zeroout may
overflow, so declare it as unsigned int to avoid overflow.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240319113325.3110393-9-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Baokun Li
2024-03-19 19:33:24 +08:00
committed by Greg Kroah-Hartman
parent 139510ec27
commit 2f64ae3283
1 changed files with 2 additions and 1 deletions
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fs/ext4/extents.c
+2 -1
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@@ -3445,9 +3445,10 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
struct ext4_extent *ex, *abut_ex;
ext4_lblk_t ee_block, eof_block;
unsigned int ee_len, depth, map_len = map->m_len;
int allocated = 0, max_zeroout = 0;
int err = 0;
int split_flag = EXT4_EXT_DATA_VALID2;
int allocated = 0;
unsigned int max_zeroout = 0;
ext_debug("ext4_ext_convert_to_initialized: inode %lu, logical"
"block %llu, max_blocks %u\n", inode->i_ino,