On Mon, Jan 18, 2021 at 01:57:00PM +0000, Will Deacon wrote:
commit dca5244d2f5b94f1809f0c02a549edf41ccd5493 upstream.
GCC versions >= 4.9 and < 5.1 have been shown to emit memory references beyond the stack pointer, resulting in memory corruption if an interrupt is taken after the stack pointer has been adjusted but before the reference has been executed. This leads to subtle, infrequent data corruption such as the EXT4 problems reported by Russell King at the link below.
Life is too short for buggy compilers, so raise the minimum GCC version required by arm64 to 5.1.
Reported-by: Russell King linux@armlinux.org.uk Suggested-by: Arnd Bergmann arnd@kernel.org Signed-off-by: Will Deacon will@kernel.org Tested-by: Nathan Chancellor natechancellor@gmail.com Reviewed-by: Nick Desaulniers ndesaulniers@google.com Reviewed-by: Nathan Chancellor natechancellor@gmail.com Acked-by: Linus Torvalds torvalds@linux-foundation.org Cc: stable@vger.kernel.org # 4.19.y and 5.4.y only
All now queued up, thanks!
greg k-h