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From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org,
	codalist@coda.cs.cmu.edu, dri-devel@lists.freedesktop.org
Cc: jaharkes@cs.cmu.edu, coda@cs.cmu.edu, miklos@szeredi.hu,
	akpm@linux-foundation.org, jgg@ziepe.ca
Subject: [PATCH 1/2] coda: fix reference counting in coda_file_mmap error path
Date: Wed, 21 Apr 2021 15:20:11 +0200	[thread overview]
Message-ID: <20210421132012.82354-1-christian.koenig@amd.com> (raw)

mmap_region() now calls fput() on the vma->vm_file.

So we need to drop the extra reference on the coda file instead of the
host file.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 1527f926fd04 ("mm: mmap: fix fput in error path v2")
CC: stable@vger.kernel.org # 5.11+
---
 fs/coda/file.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/coda/file.c b/fs/coda/file.c
index 128d63df5bfb..ef5ca22bfb3e 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -175,10 +175,10 @@ coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
 	ret = call_mmap(vma->vm_file, vma);
 
 	if (ret) {
-		/* if call_mmap fails, our caller will put coda_file so we
-		 * should drop the reference to the host_file that we got.
+		/* if call_mmap fails, our caller will put host_file so we
+		 * should drop the reference to the coda_file that we got.
 		 */
-		fput(host_file);
+		fput(coda_file);
 		kfree(cvm_ops);
 	} else {
 		/* here we add redirects for the open/close vm_operations */
-- 
2.25.1


             reply	other threads:[~2021-04-21 13:23 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21 13:20 Christian König [this message]
2021-04-21 13:20 ` [PATCH 2/2] ovl: fix reference counting in ovl_mmap error path Christian König
2021-04-22  8:13   ` Daniel Vetter
2021-04-22  8:11 ` [PATCH 1/2] coda: fix reference counting in coda_file_mmap " Daniel Vetter
2021-04-22 12:27 ` Jan Harkes
2021-04-22 12:39   ` Christian König
2021-04-22 13:51     ` Jan Harkes
2021-04-23  8:10       ` Christian König

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