Xue jiufei 4a184b4ff4 ocfs2: fix NULL pointer dereference when traversing o2hb_all_regions ... There may exist NULL pointer dereference in config_item_name() when one volume (say Volume A) unmounts while another (say Volume B) mounting. Volume A Volume B already Mounted. Unmounting, call o2hb_heartbeat_group_drop_item() -> config_item_put(item) set reg(A)->item.ci_name to NULL in function config_item_cleanup(). begin mounting, call o2hb_region_pin() and tranverse all regions. When reading reg(A)->item.ci_name, it causes NULL pointer dereference. call o2hb_region_release() and del reg(A) from list. So we should skip accessing regions that is going to release when tranverse o2hb_all_regions. Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com> Signed-off-by: joyce <xuejiufei@huawei.com> Acked-by: Joel Becker <jlbec@evilplan.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Sunil Mushran <sunil.mushran@gmail.com> Cc: Jie Liu <jeff.liu@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-07-03 16:07:25 -07:00
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heartbeat.c	ocfs2: fix NULL pointer dereference when traversing o2hb_all_regions	2013-07-03 16:07:25 -07:00
heartbeat.h
Makefile
masklog.c
masklog.h
netdebug.c
nodemanager.c
nodemanager.h
ocfs2_heartbeat.h
ocfs2_nodemanager.h
quorum.c	ocfs2: fix a comments typo at o2quo_hb_still_up()	2013-07-03 16:07:24 -07:00
quorum.h
sys.c
sys.h
tcp.c	ocfs2: adjust switch_case syntax at o2net_state_change()	2013-07-03 16:07:25 -07:00
tcp.h
tcp_internal.h
ver.c
ver.h