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| author | Kees Cook <keescook@chromium.org> | 2018-08-18 01:44:11 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-18 02:20:27 +0300 |
| commit | 2c27ce915078a5822aefb5db7bc2481664b26044 (patch) | |
| tree | 7c735100cf589ffd9f00d8cd7b8b07c54dc9408f /security | |
| parent | ac4ecf968acb9e54c335f99d842d56d6b90e28fb (diff) | |
| download | linux-2c27ce915078a5822aefb5db7bc2481664b26044.tar.xz | |
ntfs: decompress: remove VLA usage
In the quest to remove all stack VLA usage from the kernel[1], this
moves the stack buffer used during decompression to be allocated
externally.
The existing "dest_max_index" used in the VLA is bounded by cb_max_page.
cb_max_page is bounded by max_page, and max_page is bounded by nr_pages.
Since nr_pages is used for the "pages" allocation, it can similarly be
used for the "completed_pages" allocation and passed into the
decompression function. The error paths are updated to free the new
allocation.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Link: http://lkml.kernel.org/r/20180626172909.41453-3-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Anton Altaparmakov <anton@tuxera.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions