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由 Mark Rutland 提交于
When CONFIG_DEBUG_USER is enabled, it's possible for a user to deliberately trigger dump_instr() with a chosen kernel address. Let's avoid problems resulting from this by using get_user() rather than __get_user(), ensuring that we don't erroneously access kernel memory. So that we can use the same code to dump user instructions and kernel instructions, the common dumping code is factored out to __dump_instr(), with the fs manipulated appropriately in dump_instr() around calls to this. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Cc: stable@vger.kernel.org Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
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