5.15-stable review patch. If anyone has any objections, please let me know.
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From: Baokun Li libaokun1@huawei.com
[ Upstream commit 261341a932d9244cbcd372a3659428c8723e5a49 ]
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 --- fs/ext4/extents.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 6c41bf322315c..a3869e9c71b91 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3404,9 +3404,10 @@ 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(inode, "logical block %llu, max_blocks %u\n", (unsigned long long)map->m_lblk, map_len);