From: Will Deacon <[email protected]> [ Upstream commit 24951465cbd279f60b1fdc2421b3694405bcff42 ]
arch/arm/ defines a SIGMINSTKSZ of 2k, so we should use the same value for compat tasks. Cc: <[email protected]> # 4.9+ Cc: Aurelien Jarno <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Dominik Brodowski <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Al Viro <[email protected]> Cc: Oleg Nesterov <[email protected]> Reviewed-by: Dave Martin <[email protected]> Reported-by: Steve McIntyre <[email protected]> Tested-by: Steve McIntyre <[email protected]> Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Catalin Marinas <[email protected]> --- Aurelien points out that this didn't get selected for -stable despite its counterpart (22839869f21a ("signal: Introduce COMPAT_SIGMINSTKSZ for use in compat_sys_sigaltstack")) being backported to 4.9. Oops. arch/arm64/include/asm/compat.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 1a037b94eba1..cee28a05ee98 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -159,6 +159,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr) } #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) +#define COMPAT_MINSIGSTKSZ 2048 static inline void __user *arch_compat_alloc_user_space(long len) { -- 2.11.0
