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| author | Anders Roxell <[email protected]> | 2025-07-04 12:53:35 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <[email protected]> | 2025-08-01 13:11:08 +0000 |
| commit | d9ea58b5dc6b4b50fbb6a10c73f840e8b10442b7 (patch) | |
| tree | faf5d37c8f01123472aa44cd15d477a2d4766e3d /rust/helpers/rcu.c | |
| parent | vdpa/mlx5: Fix release of uninitialized resources on error path (diff) | |
| download | kernel-d9ea58b5dc6b4b50fbb6a10c73f840e8b10442b7.tar.gz kernel-d9ea58b5dc6b4b50fbb6a10c73f840e8b10442b7.zip | |
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: c8a6153b6c59 ("vduse: Introduce VDUSE - vDPA Device in Userspace")
Signed-off-by: Anders Roxell <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Diffstat (limited to 'rust/helpers/rcu.c')
0 files changed, 0 insertions, 0 deletions