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519ea6f1c8
linux/arch/arm64
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Vincenzo Frascino 519ea6f1c8 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: 68dd8ef321 ("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>
2021-01-26 17:53:32 +00:00
..
boot ARM: SoC fixes for v5.11 2021-01-08 14:13:54 -08:00
configs ARM: device tree updates for 5.11 2020-12-16 16:27:35 -08:00
crypto crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
include arm64: Fix kernel address detection of __is_lm_address() 2021-01-26 17:53:32 +00:00
kernel arm64: kprobes: Fix Uexpected kernel BRK exception at EL1 2021-01-22 16:05:29 +00:00
kvm KVM/arm64 fixes for 5.11, take #1 2021-01-08 05:02:40 -05:00
lib arm64: mte: add in-kernel MTE helpers 2020-12-22 12:55:07 -08:00
mm kasan, arm64: fix pointer tags in KASAN reports 2021-01-18 18:15:49 +00:00
net arm64: bpf: Fix branch offset in JIT 2020-09-17 12:05:36 +01:00
xen arm64: xen: Use modern annotations for assembly functions 2020-01-09 16:09:42 +00:00
Kbuild
Kconfig Revert "arm64: Enable perf events based hard lockup detector" 2021-01-13 15:08:41 +00:00
Kconfig.debug arm64: remove TEXT_OFFSET randomization 2020-06-15 13:10:59 +01:00
Kconfig.platforms ARM: device tree updates for 5.11 2020-12-16 16:27:35 -08:00
Makefile arm64: link with -z norelro for LLD or aarch64-elf 2021-01-05 11:51:41 +00:00