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| author | Eugene Shatokhin <eugene.shatokhin@rosalab.ru> | 2015-03-17 19:09:18 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-17 14:00:38 +0100 |
| commit | c80e5c0c23ce2282476fdc64c4b5e3d3a40723fd (patch) | |
| tree | 056afab9efce2ce76166abb5d6ba177d62e0ebb0 /arch/x86/lib/cmpxchg8b_emu.S | |
| parent | 107eb964d8c04417e8bce9e9ec2ed61d9261aec6 (diff) | |
| download | op-kernel-dev-c80e5c0c23ce2282476fdc64c4b5e3d3a40723fd.zip op-kernel-dev-c80e5c0c23ce2282476fdc64c4b5e3d3a40723fd.tar.gz | |
kprobes/x86: Return correct length in __copy_instruction()
On x86-64, __copy_instruction() always returns 0 (error) if the
instruction uses %rip-relative addressing. This is because
kernel_insn_init() is called the second time for 'insn' instance
in such cases and sets all its fields to 0.
Because of this, trying to place a kprobe on such instruction
will fail, register_kprobe() will return -EINVAL.
This patch fixes the problem.
Signed-off-by: Eugene Shatokhin <eugene.shatokhin@rosalab.ru>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Link: http://lkml.kernel.org/r/20150317100918.28349.94654.stgit@localhost.localdomain
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/lib/cmpxchg8b_emu.S')
0 files changed, 0 insertions, 0 deletions
