4.14-stable review patch. If anyone has any objections, please let me know.
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From: Chris Phlipot cphlipot0@gmail.com
[ Upstream commit a72f64261359b7451f8478f2a2bf357b4e6c757f ]
In the write to the output_fd in the error condition of record_saved_cmdline(), we are writing 8 bytes from a memory location on the stack that contains a primitive that is only 4 bytes in size. Change the primitive to 8 bytes in size to match the size of the write in order to avoid reading unknown memory from the stack.
Signed-off-by: Chris Phlipot cphlipot0@gmail.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lkml.kernel.org/r/20180829061954.18871-1-cphlipot0@gmail.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/util/trace-event-info.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -379,7 +379,7 @@ out:
static int record_saved_cmdline(void) { - unsigned int size; + unsigned long long size; char *path; struct stat st; int ret, err = 0;