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| author | Vincenzo Frascino <vincenzo.frascino@arm.com> | 2021-01-26 13:40:56 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-01-26 17:53:32 +0000 |
| commit | 519ea6f1c82fcdc9842908155ae379de47818778 (patch) | |
| tree | c18ca05a1beed19e27977af1a503081a73349051 /drivers/usb/cdns3/cdns3-imx.c | |
| parent | 75bd4bff300b3c5252d4a0e7a959569c62d1dbae (diff) | |
| download | linux-519ea6f1c82fcdc9842908155ae379de47818778.tar.gz linux-519ea6f1c82fcdc9842908155ae379de47818778.tar.bz2 linux-519ea6f1c82fcdc9842908155ae379de47818778.zip | |
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>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
0 files changed, 0 insertions, 0 deletions