Adding upstream version 6.9.8.upstream/6.9.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 6 insertions, 9 deletions

diff --git a/arch/x86/include/asm/entry-common.h b/arch/x86/include/asm/entry-common.h
index 7e523bb3d2..fb2809b20b 100644
--- a/arch/x86/include/asm/entry-common.h
+++ b/arch/x86/include/asm/entry-common.h
@@ -73,19 +73,16 @@ static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs,
 #endif
 
 	/*
-	 * Ultimately, this value will get limited by KSTACK_OFFSET_MAX(),
-	 * but not enough for x86 stack utilization comfort. To keep
-	 * reasonable stack head room, reduce the maximum offset to 8 bits.
-	 *
-	 * The actual entropy will be further reduced by the compiler when
-	 * applying stack alignment constraints (see cc_stack_align4/8 in
+	 * This value will get limited by KSTACK_OFFSET_MAX(), which is 10
+	 * bits. The actual entropy will be further reduced by the compiler
+	 * when applying stack alignment constraints (see cc_stack_align4/8 in
 	 * arch/x86/Makefile), which will remove the 3 (x86_64) or 2 (ia32)
 	 * low bits from any entropy chosen here.
 	 *
-	 * Therefore, final stack offset entropy will be 5 (x86_64) or
-	 * 6 (ia32) bits.
+	 * Therefore, final stack offset entropy will be 7 (x86_64) or
+	 * 8 (ia32) bits.
 	 */
-	choose_random_kstack_offset(rdtsc() & 0xFF);
+	choose_random_kstack_offset(rdtsc());
 }
 #define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare