On Thu, 15 Oct 2026 08:36:35 +0000, Deep Shah wrote:

Fix two lifetime bugs in the uverbs DMABUF export path. Patch 1 fixes leaked uobject and ufile references when the uverbs FD is closed first. Patch 2 fixes a use-after-free when dma-buf release races with ufile cleanup.

Tested on mainline 4056b3c9d3c9 in x86_64 QEMU with KASAN and lockdep, using test-only siw export hooks. The unpatched kernel reproduces both bugs. Patch 1 fixes the leak, confirmed by tracing ufile release. With both patches, the same tests complete without KASAN or lockdep reports.

[...]

Applied, thanks!

[1/2] RDMA/uverbs: Fix uobject leak in DMABUF release https://git.kernel.org/rdma/rdma/c/4a953ee228f554 [2/2] RDMA/uverbs: Fix DMABUF use-after-free during ufile cleanup https://git.kernel.org/rdma/rdma/c/2854f9025d4ef6

Best regards,