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| author | Dan Carpenter <[email protected]> | 2018-10-30 22:04:32 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-10-31 15:54:12 +0000 |
| commit | 4b408c74ee5a0b74fc9265c2fe39b0e7dec7c056 (patch) | |
| tree | 246fef299b54169bc2e6c9c298df9da367021069 /lib/bitmap.c | |
| parent | mm/hmm: invalidate device page table at start of invalidation (diff) | |
| download | kernel-4b408c74ee5a0b74fc9265c2fe39b0e7dec7c056.tar.gz kernel-4b408c74ee5a0b74fc9265c2fe39b0e7dec7c056.zip | |
mm/gup_benchmark.c: prevent integer overflow in ioctl
The concern here is that "gup->size" is a u64 and "nr_pages" is unsigned
long. On 32 bit systems we could trick the kernel into allocating fewer
pages than expected.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 64c349f4ae78 ("mm: add infrastructure for get_user_pages_fast() benchmarking")
Signed-off-by: Dan Carpenter <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Keith Busch <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: YueHaibing <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/bitmap.c')
0 files changed, 0 insertions, 0 deletions