Colin Ian King 97b56f17b3 selftests/resctrl: Fix null pointer dereference on open failed ... [ Upstream commit c7b607fa9325ccc94982774c505176677117689c ] Currently if opening /dev/null fails to open then file pointer fp is null and further access to fp via fprintf will cause a null pointer dereference. Fix this by returning a negative error value when a null fp is detected. Detected using cppcheck static analysis: tools/testing/selftests/resctrl/fill_buf.c:124:6: note: Assuming that condition '!fp' is not redundant if (!fp) ^ tools/testing/selftests/resctrl/fill_buf.c:126:10: note: Null pointer dereference fprintf(fp, "Sum: %d ", ret); Fixes: a2561b12fe ("selftests/resctrl: Add built in benchmark") Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-09 10:21:03 +02:00
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fault-injection
ktest
kunit
nvdimm
radix-tree
scatterlist
selftests	selftests/resctrl: Fix null pointer dereference on open failed	2022-06-09 10:21:03 +02:00
vsock