diff options
| author | Kalesh Singh <[email protected]> | 2020-12-29 23:14:40 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-12-29 23:36:49 +0000 |
| commit | e05986ee7a5814bec0e0075d813daca3d46e4a9e (patch) | |
| tree | 49d3a5bbfa9d636584d8e449c349cd0d75663bff /lib/genalloc.c | |
| parent | mm: memmap defer init doesn't work as expected (diff) | |
| download | kernel-e05986ee7a5814bec0e0075d813daca3d46e4a9e.tar.gz kernel-e05986ee7a5814bec0e0075d813daca3d46e4a9e.zip | |
mm/mremap.c: fix extent calculation
When `next < old_addr`, `next - old_addr` arithmetic underflows causing
`extent` to be incorrect.
Make `extent` the smaller of `next - old_addr` or `old_end - old_addr`.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: c49dd34018026 ("mm: speedup mremap on 1GB or larger regions")
Signed-off-by: Kalesh Singh <[email protected]>
Reported-by: Guenter Roeck <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Lokesh Gidra <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/genalloc.c')
0 files changed, 0 insertions, 0 deletions