linux/net/ceph
Alex Elder 5ce765a540 libceph: only kunmap kmapped pages
In write_partial_msg_pages(), pages need to be kmapped in order to
perform a CRC-32c calculation on them.  As an artifact of the way
this code used to be structured, the kunmap() call was separated
from the kmap() call and both were done conditionally.  But the
conditions under which the kmap() and kunmap() calls were made
differed, so there was a chance a kunmap() call would be done on a
page that had not been mapped.

The symptom of this was tripping a BUG() in kunmap_high() when
pkmap_count[nr] became 0.

Reported-by: Bryan K. Wright <bryan@virginia.edu>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
2012-09-21 20:49:26 -07:00
..
crush libceph: support crush tunables 2012-07-30 18:15:23 -07:00
Kconfig ceph: use kernel DNS resolver 2011-10-25 16:10:16 -07:00
Makefile Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
armor.c libceph: Fix base64-decoding when input ends in newline. 2011-03-15 09:14:02 -07:00
auth.c ceph: Move secret key parsing earlier. 2011-03-29 12:11:16 -07:00
auth_none.c ceph: messenger: reduce args to create_authorizer 2012-05-17 08:18:12 -05:00
auth_none.h
auth_x.c ceph: messenger: reduce args to create_authorizer 2012-05-17 08:18:12 -05:00
auth_x.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
auth_x_protocol.h
buffer.c net: allow GFP_HIGHMEM in __vmalloc() 2010-11-21 10:04:04 -08:00
ceph_common.c libceph: delay debugfs initialization until we learn global_id 2012-08-20 10:03:15 -07:00
ceph_fs.c ceph: fix file mode calculation 2011-07-19 11:25:04 -07:00
ceph_hash.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ceph_strings.c
crypto.c libceph: fix crypto key null deref, memory leak 2012-08-02 09:19:20 -07:00
crypto.h libceph: fix crypto key null deref, memory leak 2012-08-02 09:19:20 -07:00
debugfs.c libceph: delay debugfs initialization until we learn global_id 2012-08-20 10:03:15 -07:00
messenger.c libceph: only kunmap kmapped pages 2012-09-21 20:49:26 -07:00
mon_client.c libceph: delay debugfs initialization until we learn global_id 2012-08-20 10:03:15 -07:00
msgpool.c libceph: initialize msgpool message types 2012-07-30 09:29:50 -07:00
osd_client.c libceph: be less chatty about stray replies 2012-07-30 18:16:03 -07:00
osdmap.c libceph: support crush tunables 2012-07-30 18:15:23 -07:00
pagelist.c net: Fix non-kernel-doc comments with kernel-doc start marker 2012-07-10 23:13:45 -07:00
pagevec.c libceph: fix handling of short returns from get_user_pages 2011-03-03 13:47:39 -08:00