Message ID | 20230202141919.2298821-1-gregkh@linuxfoundation.org (mailing list archive) |
---|---|
State | Accepted |
Commit | b505063910c134778202dfad9332dfcecb76bab3 |
Headers | show |
Series | ppc: iommu: fix memory leak with using debugfs_lookup() | expand |
Context | Check | Description |
---|---|---|
snowpatch_ozlabs/github-powerpc_ppctests | success | Successfully ran 8 jobs. |
snowpatch_ozlabs/github-powerpc_selftests | success | Successfully ran 8 jobs. |
snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 24 jobs. |
snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 6 jobs. |
snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
On Thu, 2 Feb 2023 15:19:19 +0100, Greg Kroah-Hartman wrote: > When calling debugfs_lookup() the result must have dput() called on it, > otherwise the memory will leak over time. To make things simpler, just > call debugfs_lookup_and_remove() instead which handles all of the logic > at once. > > Applied to powerpc/next. [1/1] ppc: iommu: fix memory leak with using debugfs_lookup() https://git.kernel.org/powerpc/c/b505063910c134778202dfad9332dfcecb76bab3 cheers
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index caebe1431596..ee95937bdaf1 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -67,11 +67,9 @@ static void iommu_debugfs_add(struct iommu_table *tbl) static void iommu_debugfs_del(struct iommu_table *tbl) { char name[10]; - struct dentry *liobn_entry; sprintf(name, "%08lx", tbl->it_index); - liobn_entry = debugfs_lookup(name, iommu_debugfs_dir); - debugfs_remove(liobn_entry); + debugfs_lookup_and_remove(name, iommu_debugfs_dir); } #else static void iommu_debugfs_add(struct iommu_table *tbl){}
When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Alexey Kardashevskiy <aik@ozlabs.ru> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/powerpc/kernel/iommu.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)