Why "problematic"? The Al Viro change mentioned in the fix is https://github.com/torvalds/linux/commit/227158db160449b6513d2e31894a135104b90e90 https://github.c

Why "problematic"? The Al Viro change mentioned in the fix is https://github.com/torvalds/linux/commit/227158db160449b6513d2e31894a135104b90e90 https://github.com/torvalds/linux/commit/227158db160449b6513.... The commit says this makes the bug not exploitable since the new helper function handles correctly the edge case. The fix still needs to be applied to avoid computing the checksum twice.