CVE-2026-74308

In the Linux kernel, the following vulnerability has been resolved:

ext4: fix kernel BUG in ext4_write_inline_data_end

When the data=journal mount option is used, the ext4_journalled_write_end()

function incorrectly calls ext4_write_inline_data_end() without checking

if the EXT4_STATE_MAY_INLINE_DATA flag is still set on the inode.

If a previous attempt to convert the inline data to an extent failed (e.g.

due to ENOSPC), the EXT4_STATE_MAY_INLINE_DATA flag is cleared, but

the EXT4_INODE_INLINE_DATA flag remains set. In this scenario, the next

call to ext4_write_begin() will not prepare the inline data xattr for

writing, but ext4_journalled_write_end() will incorrectly attempt to write

to it, triggering a BUG_ON(pos + len > EXT4_I(inode)->i_inline_size) in

ext4_write_inline_data() since i_inline_size was not expanded.

Fix this by ensuring that ext4_journalled_write_end() only calls

ext4_write_inline_data_end() if the EXT4_STATE_MAY_INLINE_DATA flag is

set, mirroring the behavior of ext4_write_end() and ext4_da_write_end().