linux-loongson/drivers/vdpa/vdpa_user
Anders Roxell d9ea58b5dc vdpa: Fix IDR memory leak in VDUSE module exit
Add missing idr_destroy() call in vduse_exit() to properly free the
vduse_idr radix tree nodes. Without this, module load/unload cycles leak
576-byte radix tree node allocations, detectable by kmemleak as:

unreferenced object (size 576):
  backtrace:
    [<ffffffff81234567>] radix_tree_node_alloc+0xa0/0xf0
    [<ffffffff81234568>] idr_get_free+0x128/0x280

The vduse_idr is initialized via DEFINE_IDR() at line 136 and used throughout
the VDUSE (vDPA Device in Userspace) driver for device ID management. The fix
follows the documented pattern in lib/idr.c and matches the cleanup approach
used by other drivers.

This leak was discovered through comprehensive module testing with cumulative
kmemleak detection across 10 load/unload iterations per module.

Fixes: c8a6153b6c ("vduse: Introduce VDUSE - vDPA Device in Userspace")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Message-Id: <20250704125335.1084649-1-anders.roxell@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2025-08-01 09:11:08 -04:00
..
iova_domain.c vduse: avoid using __GFP_NOFAIL 2024-09-09 16:39:02 -07:00
iova_domain.h vduse: avoid using __GFP_NOFAIL 2024-09-09 16:39:02 -07:00
Makefile
vduse_dev.c vdpa: Fix IDR memory leak in VDUSE module exit 2025-08-01 09:11:08 -04:00