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commit 77b6ec01c29aade01701aa30bf1469acc7f2be76 upstream.
clang static analysis reports this problem
dfs_cache.c:591:2: warning: Argument to kfree() is a constant address
(18446744073709551614), which is not memory allocated by malloc()
kfree(vi);
^~~~~~~~~
In dfs_cache_del_vol() the volume info pointer 'vi' being freed
is the return of a call to find_vol(). The large constant address
is find_vol() returning an error.
Add an error check to dfs_cache_del_vol() similar to the one done
in dfs_cache_update_vol().
Fixes: 54be1f6c1c37 ("cifs: Add DFS cache routines")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
CC: <stable@vger.kernel.org> # v5.0+
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
0e4c42cb4a