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Miklos Szeredi authored
EXT4 may be used as lower layer of overlayfs and accessing f_path.dentry can lead to a crash. Fix by replacing direct access of file->f_path.dentry with the file_dentry() accessor, which will always return a native object. Reported-by:
Daniel Axtens <dja@axtens.net> Fixes: 4bacc9c9 ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay") Fixes: ff978b09 ("ext4 crypto: move context consistency check to ext4_file_open()") Signed-off-by:
Miklos Szeredi <mszeredi@redhat.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> # v4.5
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