Messages in this thread | | | From | Will Deacon <> | Subject | Re: [PATCH] arm64: Avoid premature usercopy failure | Date | Thu, 15 Jul 2021 18:39:03 +0100 |
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On Mon, 12 Jul 2021 15:27:46 +0100, Robin Murphy wrote: > Al reminds us that the usercopy API must only return complete failure > if absolutely nothing could be copied. Currently, if userspace does > something silly like giving us an unaligned pointer to Device memory, > or a size which overruns MTE tag bounds, we may fail to honour that > requirement when faulting on a multi-byte access even though a smaller > access could have succeeded. > > [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: Avoid premature usercopy failure https://git.kernel.org/arm64/c/295cf156231c
Cheers, -- Will
https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev
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