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(parent: 30f5925) | patch
h8300/ptrace: Fix incorrect register transfer count
authorDave Martin <Dave.Martin@arm.com>
Mon, 27 Mar 2017 14:10:54 +0000 (15:10 +0100)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 29 Mar 2017 15:54:17 +0000 (08:54 -0700)
commit552a00c6c97be45c0d2df9c8de6c4692177ee6ba
treeceadf8d793ceaae32940754291fbd056a7cfa2cetree | snapshot
parent30f59253bda827db3c950c12a7b9d8b3e3942139commit | diff
h8300/ptrace: Fix incorrect register transfer count

regs_set() and regs_get() are vulnerable to an off-by-1 buffer overrun
if CONFIG_CPU_H8S is set, since this adds an extra entry to
register_offset[] but not to user_regs_struct.

So, iterate over user_regs_struct based on its actual size, not based on
the length of register_offset[].

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/h8300/kernel/ptrace.c diff | blob | history
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