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| author | Matthew Wilcox (Oracle) <[email protected]> | 2023-09-07 13:40:07 +0000 |
|---|---|---|
| committer | Theodore Ts'o <[email protected]> | 2023-09-07 19:16:49 +0000 |
| commit | f94cf2206b066bd6d761d3347fd35f77b828c376 (patch) | |
| tree | 4ea354425663f47fb1d3145675bea1b914b5d530 /fs/jbd2/commit.c | |
| parent | ext4: fix slab-use-after-free in ext4_es_insert_extent() (diff) | |
| download | kernel-f94cf2206b066bd6d761d3347fd35f77b828c376.tar.gz kernel-f94cf2206b066bd6d761d3347fd35f77b828c376.zip | |
buffer: Make bh_offset() work for compound pages
If the buffer pointed to by the buffer_head is part of a compound page,
bh_offset() assumes that b_page is the precise page that contains
the data. A recent change to jbd2 inadvertently violated that assumption.
By using page_size(), we support both b_page being set to the head page
(as page_size() will return the size of the entire folio) and the precise
page (as it will return PAGE_SIZE for a tail page).
Fixes: 8147c4c4546f ("jbd2: use a folio in jbd2_journal_write_metadata_buffer()")
Reported-by: Zorro Lang <[email protected]>
Tested-by: Ritesh Harjani (IBM) <[email protected]>
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Diffstat (limited to 'fs/jbd2/commit.c')
0 files changed, 0 insertions, 0 deletions