diff options
| author | Anders Roxell <anders.roxell@linaro.org> | 2025-07-04 14:53:35 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-15 12:13:58 +0200 |
| commit | 3c8a15f2229d4bbfefaddff9a83b976cebf107f4 (patch) | |
| tree | 7211fa74975deb35282555c48599d540167d0ef1 /include/uapi/linux | |
| parent | 37f26b9013b46457b0a96633fc3a7dc977d8beb1 (diff) | |
vdpa: Fix IDR memory leak in VDUSE module exit
[ Upstream commit d9ea58b5dc6b4b50fbb6a10c73f840e8b10442b7 ]
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: c8a6153b6c59 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/uapi/linux')
0 files changed, 0 insertions, 0 deletions