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| author | Suren Baghdasaryan <[email protected]> | 2024-07-11 22:04:57 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-07-18 04:05:19 +0000 |
| commit | 6ab42fe21c84d72da752923b4bd7075344f4a362 (patch) | |
| tree | 95f1df4c734dbb0607436085134dd91f64111b63 /rust/helpers.c | |
| parent | lib: reuse page_ext_data() to obtain codetag_ref (diff) | |
| download | kernel-6ab42fe21c84d72da752923b4bd7075344f4a362.tar.gz kernel-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/[email protected]
Fixes: be25d1d4e822 ("mm: create new codetag references during page splitting")
Signed-off-by: Suren Baghdasaryan <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Sourav Panda <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'rust/helpers.c')
0 files changed, 0 insertions, 0 deletions