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coda: fix reference counting in coda_file_mmap error path

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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.

Link: https://lkml.kernel.org/r/20210421132012.82354-1-christian.koenig@amd.com
Fixes: 1527f926fd ("mm: mmap: fix fput in error path v2")
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: <stable@vger.kernel.org>	[5.11+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christian König
2021-04-23 14:28:51 -07:00
committed by Linus Torvalds
parent 5bfc75d92e
commit 9da29c7f77
1 changed files with 3 additions and 3 deletions
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6
fs/coda/file.c
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@@ -175,10 +175,10 @@ coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
ret = call_mmap(vma->vm_file, vma); ret = call_mmap(vma->vm_file, vma);
if (ret) { if (ret) {
/* if call_mmap fails, our caller will put coda_file so we /* if call_mmap fails, our caller will put host_file so we
* should drop the reference to the host_file that we got. * should drop the reference to the coda_file that we got.
*/ */
fput(host_file); fput(coda_file);
kfree(cvm_ops); kfree(cvm_ops);
} else { } else {
/* here we add redirects for the open/close vm_operations */ /* here we add redirects for the open/close vm_operations */