um: Fix PTRACE_POKEUSER on x86_64
commit 9abc74a2 upstream. 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. Reported-by: jie cao <cj3054@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Showing
Please register or sign in to comment