diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch b/target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch deleted file mode 100644 index 50b210e14f..0000000000 --- a/target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch +++ /dev/null @@ -1,28 +0,0 @@ -From: Robin Murphy <robin.murphy@arm.com> -Date: Fri, 17 Jan 2020 15:48:39 +0000 -Subject: [PATCH] arm64: csum: Fix pathological zero-length calls - -In validating the checksumming results of the new routine, I sadly -neglected to test its not-checksumming results. Thus it slipped through -that the one case where @buff is already dword-aligned and @len = 0 -manages to defeat the tail-masking logic and behave as if @len = 8. -For a zero length it doesn't make much sense to deference @buff anyway, -so just add an early return (which has essentially zero impact on -performance). - -Signed-off-by: Robin Murphy <robin.murphy@arm.com> -Signed-off-by: Will Deacon <will@kernel.org> ---- - ---- a/arch/arm64/lib/csum.c -+++ b/arch/arm64/lib/csum.c -@@ -20,6 +20,9 @@ unsigned int do_csum(const unsigned char - const u64 *ptr; - u64 data, sum64 = 0; - -+ if (unlikely(len == 0)) -+ return 0; -+ - offset = (unsigned long)buff & 7; - /* - * This is to all intents and purposes safe, since rounding down cannot |