mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 05:31:08 -04:00
Kees Cook
de4feb4e3d
To work around a misbehavior of the compiler's ability to see into composite flexible array structs (as detailed in the coming memcpy() hardening series[1]), split the memcpy() of the header and the payload so no false positive run-time overflow warning will be generated. This split already existed for the "firstfrag" case, so just generalize the logic further. [1] https://lore.kernel.org/linux-hardening/[email protected]/ Cc: Eric Dumazet <[email protected]> Cc: Paolo Abeni <[email protected]> Reported-by: "Gustavo A. R. Silva" <[email protected]> Signed-off-by: Kees Cook <[email protected]> Reviewed-by: Gustavo A. R. Silva <[email protected]> Reviewed-by: Krzysztof Kozlowski <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>