diff options
| author | Matthew Wilcox (Oracle) <[email protected]> | 2022-06-12 22:32:27 +0100 |
|---|---|---|
| committer | Kees Cook <[email protected]> | 2022-06-13 09:54:52 -0700 |
| commit | 1dfbe9fcda4afc957f0e371e207ae3cb7e8f3b0e (patch) | |
| tree | 5d113acb38d1b7af478d04036fc46d55134c578b /tools/perf/scripts/python | |
| parent | 35fb9ae4aa2e838b234323e6f7cf6336ff019e5a (diff) | |
usercopy: Make usercopy resilient against ridiculously large copies
If 'n' is so large that it's negative, we might wrap around and mistakenly
think that the copy is OK when it's not. Such a copy would probably
crash, but just doing the arithmetic in a more simple way lets us detect
and refuse this case.
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Reviewed-by: Uladzislau Rezki (Sony) <[email protected]>
Tested-by: Zorro Lang <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions