From: Jan Kara Date: Sat, 10 Dec 2011 01:30:48 +0000 (+0100) Subject: udf: Fix deadlock when converting file from in-ICB one to normal one X-Git-Tag: v3.2.1~18 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e9f6a20b59570ca9374b5e79cf1e7df32c67944;p=pandora-kernel.git udf: Fix deadlock when converting file from in-ICB one to normal one commit d2eb8c359309ec45d6bf5b147303ab8e13be86ea upstream. During BKL removal in 2.6.38, conversion of files from in-ICB format to normal format got broken. We call ->writepage with i_data_sem held but udf_get_block() also acquires i_data_sem thus creating A-A deadlock. We fix the problem by dropping i_data_sem before calling ->writepage() which is safe since i_mutex still protects us against any changes in the file. Also fix pagelock - i_data_sem lock inversion in udf_expand_file_adinicb() by dropping i_data_sem before calling find_or_create_page(). Reported-by: Matthias Matiak Tested-by: Matthias Matiak Reviewed-by: Namjae Jeon Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed