From: Darrick J. Wong Date: Wed, 26 Nov 2014 01:45:15 +0000 (-0800) Subject: dm bufio: fix memleak when using a dm_buffer's inline bio X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~22^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=445559cdcb98a141f5de415b94fd6eaccab87e6d;p=pandora-kernel.git dm bufio: fix memleak when using a dm_buffer's inline bio When dm-bufio sets out to use the bio built into a struct dm_buffer to issue an IO, it needs to call bio_reset after it's done with the bio so that we can free things attached to the bio such as the integrity payload. Therefore, inject our own endio callback to take care of the bio_reset after calling submit_io's end_io callback. Test case: 1. modprobe scsi_debug delay=0 dif=1 dix=199 ato=1 dev_size_mb=300 2. Set up a dm-bufio client, e.g. dm-verity, on the scsi_debug device 3. Repeatedly read metadata and watch kmalloc-192 leak! Signed-off-by: Darrick J. Wong Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer Cc: stable@vger.kernel.org --- Reading git-diff-tree failed