Messages in this thread | | | Date | Thu, 13 Nov 2014 15:06:25 +0000 | From | Catalin Marinas <> | Subject | Re: [PATCH] arm64: __clear_user: handle exceptions on strb |
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On Wed, Nov 12, 2014 at 09:07:44PM +0000, Kyle McMartin wrote: > ARM64 currently doesn't fix up faults on the single-byte (strb) case of > __clear_user... which means that we can cause a nasty kernel panic as an > ordinary user with any multiple PAGE_SIZE+1 read from /dev/zero. > i.e.: dd if=/dev/zero of=foo ibs=1 count=1 (or ibs=65537, etc.)
Thanks for this, it's been like this for a while. Applied.
-- Catalin
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