https://github.com/torvalds/linux
Revision 1155bafcb79208abc6ae234c6e135ac70607755c authored by Alexander Shishkin on 15 September 2016, 15:13:52 UTC, committed by Ingo Molnar on 16 September 2016, 09:14:16 UTC
Right now, the kernel address filters in PT are prone to integer overflow that may happen in adding filter's size to its offset to obtain the end of the range. Such an overflow would also throw a #GP in the PT event configuration path. Fix this by explicitly validating the result of this calculation. Reported-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: stable@vger.kernel.org # v4.7 Cc: stable@vger.kernel.org#v4.7 Cc: vince@deater.net Link: http://lkml.kernel.org/r/20160915151352.21306-4-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Tip revision: 1155bafcb79208abc6ae234c6e135ac70607755c authored by Alexander Shishkin on 15 September 2016, 15:13:52 UTC
perf/x86/intel/pt: Do validate the size of a kernel address filter
perf/x86/intel/pt: Do validate the size of a kernel address filter
Tip revision: 1155baf
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