ksmbd: fix a mount write count leak in ksmbd_vfs_kern_path_locked()

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commit 277627b431 upstream.

If the call of ksmbd_vfs_lock_parent() fails, we drop the parent_path
references and return an error.  We need to drop the write access we
just got on parent_path->mnt before we drop the mount reference - callers
assume that ksmbd_vfs_kern_path_locked() returns with mount write
access grabbed if and only if it has returned 0.

Fixes: 864fb5d371 ("ksmbd: fix possible deadlock in smb2_open")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Al Viro 2025-07-06 02:26:45 +01:00 • committed by Greg Kroah-Hartman

parent 27fc2b31d4

commit 456ff529dc

1 changed files with 1 additions and 0 deletions

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fs/smb/server/vfs.c

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