Anders Roxell 3c8a15f222 vdpa: Fix IDR memory leak in VDUSE module exit ...

[ Upstream commit d9ea58b5dc ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-08-15 12:13:58 +02:00

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alibaba

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ifcvf

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mlx5

vdpa/mlx5: Fix release of uninitialized resources on error path

2025-08-15 12:13:58 +02:00

octeon_ep

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pds

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solidrun

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vdpa_sim

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vdpa_user

vdpa: Fix IDR memory leak in VDUSE module exit

2025-08-15 12:13:58 +02:00

virtio_pci

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Kconfig

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Makefile

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vdpa.c

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