On Mon, Jan 25, 2021 at 01:24:25PM +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@xxxxxxxxxxxxxxx> > Suggested-by: Arnd Bergmann <arnd@xxxxxxxxxx> > Signed-off-by: Will Deacon <will@xxxxxxxxxx> > Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > Acked-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> # 4.4.y, 4.9.y and 4.14.y only > Cc: Theodore Ts'o <tytso@xxxxxxx> > Cc: Florian Weimer <fweimer@xxxxxxxxxx> > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > Cc: Nathan Chancellor <natechancellor@xxxxxxxxx> > Cc: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> > Link: https://lore.kernel.org/r/20210105154726.GD1551@xxxxxxxxxxxxxxxxxxxxx > Link: https://lore.kernel.org/r/20210112224832.10980-1-will@xxxxxxxxxx > Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> > [will: backport to 4.4.y/4.9.y/4.14.y; add __clang__ check] > Link: https://lore.kernel.org/r/CA+G9fYuzE9WMSB7uGjV4gTzK510SHEdJb_UXQCzsQ5MqA=h9SA@xxxxxxxxxxxxxx > Signed-off-by: Will Deacon <will@xxxxxxxxxx> > --- > include/linux/compiler-gcc.h | 6 ++++++ > 1 file changed, 6 insertions(+) Thanks, now queued up, let's try this again :) greg k-h
