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| author | Jan Kara <jack@suse.cz> | 2011-12-10 02:30:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-12 11:29:37 -0800 |
| commit | 9e9f6a20b59570ca9374b5e79cf1e7df32c67944 (patch) | |
| tree | d320f1514d00321bea3f75721fed5a93612a4443 /drivers | |
| parent | 62cf6918d66acca738688658e33f9686ab174d94 (diff) | |
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 <netzpython@mail-on.us>
Tested-by: Matthias Matiak <netzpython@mail-on.us>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions