Hi all, The Debian folks have observed a failure in the 32-bit arm glibc testsuite when running under a 64-bit kernel. They tracked this down to sigaltstack(2) enforcing the alternative signal stack to be at least SIGMINSTKSZ bytes, which is higher for native arm64 tasks than compat 32-bit tasks.
These patches resolve the issue by allowing an architecture to define COMPAT_SIGMINSTKSZ for compat tasks, which is then used by the sigaltstack checking code. Feedback welcome, Will --->8 Will Deacon (2): signal: Introduce COMPAT_SIGMINSTKSZ for use in compat_sys_sigaltstack arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ arch/arm64/include/asm/compat.h | 1 + include/linux/compat.h | 3 +++ kernel/signal.c | 14 +++++++++----- 3 files changed, 13 insertions(+), 5 deletions(-) -- 2.1.4
