Commit 92ed0223 authored Jul 29, 2005 by Dave Peterson Committed by Linus Torvalds Jul 30, 2005

[PATCH] x86_64: fix bug in csum_partial_copy_generic()



I was observing reproducible crashes on the "movw %bx,(%rsi)" instruction
below while a process in a recvfrom() system call was copying packet data
to user space.  The patch below fixes the exception table and causes the
crash to no longer reproduce.  Please apply.

Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 5ce17b18

arch/x86_64/lib/csum-copy.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -188,8 +188,8 @@ csum_partial_copy_generic:
		source
		movw (%rdi),%bx
		adcl %ebx,%eax
		dest
		decl %ecx
		dest
		movw %bx,(%rsi)
		leaq 2(%rdi),%rdi
		leaq 2(%rsi),%rsi