On Wed, Feb 03, 2021 at 01:15:03PM +0000, Catalin Marinas wrote:
Hi Greg,
On Sun, Jan 31, 2021 at 03:40:58PM +0100, Greg Kroah-Hartman wrote:
The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 519ea6f1c82fcdc9842908155ae379de47818778 Mon Sep 17 00:00:00 2001 From: Vincenzo Frascino vincenzo.frascino@arm.com Date: Tue, 26 Jan 2021 13:40:56 +0000 Subject: [PATCH] arm64: Fix kernel address detection of __is_lm_address()
Currently, the __is_lm_address() check just masks out the top 12 bits of the address, but if they are 0, it still yields a true result. This has as a side effect that virt_addr_valid() returns true even for invalid virtual addresses (e.g. 0x0).
Fix the detection checking that it's actually a kernel address starting at PAGE_OFFSET.
Fixes: 68dd8ef32162 ("arm64: memory: Fix virt_addr_valid() using __is_lm_address()") Cc: stable@vger.kernel.org # 5.4.x Cc: Will Deacon will@kernel.org Suggested-by: Catalin Marinas catalin.marinas@arm.com Reviewed-by: Catalin Marinas catalin.marinas@arm.com Acked-by: Mark Rutland mark.rutland@arm.com Signed-off-by: Vincenzo Frascino vincenzo.frascino@arm.com Link: https://lore.kernel.org/r/20210126134056.45747-1-vincenzo.frascino@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com
I sent you the 5.4 and 5.10 backports of this patch. There is another fix in this area which I'll send to Linus tonight. It should apply cleanly on 5.4 and 5.10.
Both now applied. What is the git id of the other fix in Linus's tree?
thanks,
greg k-h