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| author |   Suren Baghdasaryan <surenb@google.com> | 2024-07-11 15:04:57 -0700 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-07-17 21:05:19 -0700 |
| commit | 6ab42fe21c84d72da752923b4bd7075344f4a362 (patch) | |
| tree | 95f1df4c734dbb0607436085134dd91f64111b63 /scripts/generate_rust_analyzer.py | |
| parent | lib: reuse page_ext_data() to obtain codetag_ref (diff) | |
| download | linux-rng-6ab42fe21c84d72da752923b4bd7075344f4a362.tar.xz linux-rng-6ab42fe21c84d72da752923b4bd7075344f4a362.zip | |
alloc_tag: fix page_ext_get/page_ext_put sequence during page splitting
pgalloc_tag_sub() might call page_ext_put() using a page different from
the one used in page_ext_get() call. This does not pose an issue since
page_ext_put() ignores this parameter as long as it's non-NULL but
technically this is wrong. Fix it by storing the original page used in
page_ext_get() and passing it to page_ext_put().
Link: https://lkml.kernel.org/r/20240711220457.1751071-3-surenb@google.com
Fixes: be25d1d4e822 ("mm: create new codetag references during page splitting")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Sourav Panda <souravpanda@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions