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| author | Ritesh Harjani <[email protected]> | 2020-05-05 15:43:14 +0000 |
|---|---|---|
| committer | Theodore Ts'o <[email protected]> | 2020-05-19 19:03:37 +0000 |
| commit | 9f44eda19529b1c3eef50676dc54b8cd0aa86aa3 (patch) | |
| tree | 2640df9bf7bd8f4fa637cc91d8b70fb45c94a400 /tools/perf/scripts/python | |
| parent | Linux 5.7-rc4 (diff) | |
| download | kernel-9f44eda19529b1c3eef50676dc54b8cd0aa86aa3.tar.gz kernel-9f44eda19529b1c3eef50676dc54b8cd0aa86aa3.zip | |
ext4: fix EXT4_MAX_LOGICAL_BLOCK macro
ext4 supports max number of logical blocks in a file to be 0xffffffff.
(This is since ext4_extent's ee_block is __le32).
This means that EXT4_MAX_LOGICAL_BLOCK should be 0xfffffffe (starting
from 0 logical offset). This patch fixes this.
The issue was seen when ext4 moved to iomap_fiemap API and when
overlayfs was mounted on top of ext4. Since overlayfs was missing
filemap_check_ranges(), so it could pass a arbitrary huge length which
lead to overflow of map.m_len logic.
This patch fixes that.
Fixes: d3b6f23f7167 ("ext4: move ext4_fiemap to use iomap framework")
Reported-by: [email protected]
Signed-off-by: Ritesh Harjani <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions