glibc/SOURCES/glibc-rh2032281-7.patch
2022-05-10 10:19:36 +00:00

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commit 3842ba494963b1d76ad5f68b8d1e5c2279160e31
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Tue Jun 1 09:23:40 2021 +0100
aarch64: align stack in clone [BZ #27939]
The AArch64 PCS requires 16 byte aligned stack. Previously if the
caller passed an unaligned stack to clone then the child crashed.
Fixes bug 27939.
diff --git a/sysdeps/unix/sysv/linux/aarch64/clone.S b/sysdeps/unix/sysv/linux/aarch64/clone.S
index e0653048259dd9a3..4a1a999447ee5cf1 100644
--- a/sysdeps/unix/sysv/linux/aarch64/clone.S
+++ b/sysdeps/unix/sysv/linux/aarch64/clone.S
@@ -48,6 +48,8 @@ ENTRY(__clone)
/* Sanity check args. */
mov x0, #-EINVAL
cbz x10, .Lsyscall_error
+ /* Align sp. */
+ and x1, x1, -16
cbz x1, .Lsyscall_error
/* Do the system call. */