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(parent: 8bba077) | patch
um: Fix PTRACE_POKEUSER on x86_64
authorRichard Weinberger <richard@nod.at>
Fri, 31 Mar 2017 22:41:57 +0000 (00:41 +0200)
committerRichard Weinberger <richard@nod.at>
Wed, 3 May 2017 20:35:31 +0000 (22:35 +0200)
commit9abc74a22d85ab29cef9896a2582a530da7e79bf
tree635cd7bee778f32723b10fdfaf8df73da7ba3245tree | snapshot (tar.gz zip)
parent8bba077066d6d0a135b7be1970691522075bf905commit | diff
um: Fix PTRACE_POKEUSER on x86_64

This is broken since ever but sadly nobody noticed.
Recent versions of GDB set DR_CONTROL unconditionally and
UML dies due to a heap corruption. It turns out that
the PTRACE_POKEUSER was copy&pasted from i386 and assumes
that addresses are 4 bytes long.

Fix that by using 8 as address size in the calculation.

Cc: <stable@vger.kernel.org>
Reported-by: jie cao <cj3054@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
arch/x86/um/ptrace_64.c diff | blob | blame | history