md_make_request: don't touch the bio after calling make_request
md_make_request was calling bio_sectors() for part_stat_add after it was calling the make_request function. This is bad because the make_request function can free the bio and because the bi_size field can change around. The fix here was suggested by Jens Axboe. It saves the sector count before the make_request call. I hit this with CONFIG_DEBUG_PAGEALLOC turned on while trying to break his pretty fusionio card. Cc: <stable@kernel.org> Signed-off-by:Chris Mason <chris.mason@oracle.com> Signed-off-by:
NeilBrown <neilb@suse.de>
parent
c6751b2b
Please register or sign in to comment