From: Jan Kara <jack@suse.cz>
Date: Mon, 20 Feb 2012 16:49:56 +0000 (+0100)
Subject: udf: Fix deadlock in udf_release_file()
X-Git-Tag: v3.2.14~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=712f04ff3aea5f7cc284df68f93b1eacb5cb0fa2;p=pandora-kernel.git

udf: Fix deadlock in udf_release_file()

commit a0391a3ae91d301c0e59368531a4de5f0b122bcf upstream.

udf_release_file() can be called from munmap() path with mmap_sem held.  Thus
we cannot take i_mutex there because that ranks above mmap_sem. Luckily,
i_mutex is not needed in udf_release_file() anymore since protection by
i_data_sem is enough to protect from races with write and truncate.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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