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[ Upstream commit6ebf198203] fpga_mgr_test_img_load_sgt() allocates memory for sgt using kunit_kzalloc() however it does not check if the allocation failed. It then passes sgt to sg_alloc_table(), which passes it to __sg_alloc_table(). This function calls memset() on sgt in an attempt to zero it out. If the allocation fails then sgt will be NULL and the memset will trigger a NULL pointer dereference. Fix this by checking the allocation with KUNIT_ASSERT_NOT_ERR_OR_NULL(). Reviewed-by: Marco Pagani <marco.pagani@linux.dev> Fixes:ccbc1c3021("fpga: add an initial KUnit suite for the FPGA Manager") Signed-off-by: Qasim Ijaz <qasdev00@gmail.com> Acked-by: Xu Yilun <yilun.xu@intel.com> Link: https://lore.kernel.org/r/20250422153737.5264-1-qasdev00@gmail.com Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>