block/blk-map.c · 53cc0b2948bcb8a084982e6c1f9bd7b337e0df38 · Kirill Smelkov / linux

You need to sign in or sign up before continuing.

When block layer fails to map iov, it calls bio_unmap_user to undo · 53cc0b29

Petr Vandrovec authored Nov 19, 2008


mapping.  Which is good if pages were mapped - but if they were provided
by someone else and just copied then bad things happen - pages are
released once here, and once by caller, leading to user triggerable BUG
at include/linux/mm.h:246.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

53cc0b29

blk-map.c 8.02 KB

Replace blk-map.c