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authorDarrick J. Wong <darrick.wong@oracle.com>2014-11-25 17:45:15 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-08 09:58:15 -0800
commite1102c5b030bb0f41bed2f9120695ce0b0165c13 (patch)
tree4935a853a854789a45c03e224e23da05b35d7a9a /fs
parentf30d637d028b4a5344d4651f30c486f9daec6804 (diff)
downloadlinux-linaro-stable-e1102c5b030bb0f41bed2f9120695ce0b0165c13.tar.gz
dm bufio: fix memleak when using a dm_buffer's inline bio
commit 445559cdcb98a141f5de415b94fd6eaccab87e6d upstream. 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 <darrick.wong@oracle.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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