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44396476a0
linux/fs/xfs
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Dave Chinner 44396476a0 xfs: reset buffer pointers before freeing them 
When we free a vmapped buffer, we need to ensure the vmap address
and length we free is the same as when it was allocated. In various
places in the log code we change the memory the buffer is pointing
to before issuing IO, but we never reset the buffer to point back to
it's original memory (or no memory, if that is the case for the
buffer).

As a result, when we free the buffer it points to memory that is
owned by something else and attempts to unmap and free it. Because
the range does not match any known mapped range, it can trigger
BUG_ON() traps in the vmap code, and potentially corrupt the vmap
area tracking.

Fix this by always resetting these buffers to their original state
before freeing them.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
2011-05-19 12:03:45 -05:00
..
linux-2.6 xfs: reset buffer pointers before freeing them 2011-05-19 12:03:45 -05:00
quota Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs 2011-04-11 15:48:57 -07:00
support xfs: kill support/debug.[ch] 2011-03-07 10:09:35 +11:00
Kconfig
Makefile Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs 2011-03-21 14:24:56 -07:00
xfs_acl.h fs: provide rcu-walk aware permission i_ops 2011-01-07 17:50:29 +11:00
xfs_ag.h xfs: exact busy extent tracking 2011-04-28 13:18:04 -05:00
xfs_alloc_btree.c xfs: exact busy extent tracking 2011-04-28 13:18:04 -05:00
xfs_alloc_btree.h
xfs_alloc.c xfs: reduce the number of pagb_lock roundtrips in xfs_alloc_clear_busy 2011-04-28 13:18:09 -05:00
xfs_alloc.h xfs: reduce the number of pagb_lock roundtrips in xfs_alloc_clear_busy 2011-04-28 13:18:09 -05:00
xfs_arch.h
xfs_attr_leaf.c
xfs_attr_leaf.h
xfs_attr_sf.h
xfs_attr.c
xfs_attr.h
xfs_bit.c
xfs_bit.h
xfs_bmap_btree.c
xfs_bmap_btree.h
xfs_bmap.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_bmap.h
xfs_btree_trace.c
xfs_btree_trace.h
xfs_btree.c
xfs_btree.h
xfs_buf_item.c Fix common misspellings 2011-03-31 11:26:23 -03:00
xfs_buf_item.h
xfs_da_btree.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_da_btree.h
xfs_dfrag.c xfs: cleanup duplicate initializations 2011-04-28 13:25:29 -05:00
xfs_dfrag.h
xfs_dinode.h
xfs_dir2_block.c
xfs_dir2_block.h
xfs_dir2_data.c
xfs_dir2_data.h
xfs_dir2_leaf.c
xfs_dir2_leaf.h
xfs_dir2_node.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_dir2_node.h
xfs_dir2_sf.c
xfs_dir2_sf.h
xfs_dir2.c xfs: convert xfs_fs_cmn_err to new error logging API 2011-03-07 10:05:35 +11:00
xfs_dir2.h
xfs_error.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_error.h xfs: kill support/debug.[ch] 2011-03-07 10:09:35 +11:00
xfs_extfree_item.c xfs: fix efi item leak on forced shutdown 2011-01-28 09:01:33 -06:00
xfs_extfree_item.h
xfs_filestream.c
xfs_filestream.h
xfs_fs.h
xfs_fsops.c xfs: convert xfs_fs_cmn_err to new error logging API 2011-03-07 10:05:35 +11:00
xfs_fsops.h xfs: ensure log covering transactions are synchronous 2011-01-11 20:28:17 -06:00
xfs_ialloc_btree.c
xfs_ialloc_btree.h
xfs_ialloc.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_ialloc.h
xfs_iget.c Merge branch 'master' into for-linus-merged 2011-01-10 21:35:55 -06:00
xfs_inode_item.c xfs: cleanup duplicate initializations 2011-04-28 13:25:29 -05:00
xfs_inode_item.h
xfs_inode.c xfs: fix xfs_itruncate_start tracing 2011-05-19 12:03:36 -05:00
xfs_inode.h Fix common misspellings 2011-03-31 11:26:23 -03:00
xfs_inum.h
xfs_iomap.c xfs: rename xfs_cmn_err_fsblock_zero() 2011-03-07 10:06:35 +11:00
xfs_iomap.h
xfs_itable.c xfs: fix variable set but not used warnings 2011-04-08 08:09:12 -05:00
xfs_itable.h
xfs_log_cil.c xfs: reduce the number of pagb_lock roundtrips in xfs_alloc_clear_busy 2011-04-28 13:18:09 -05:00
xfs_log_priv.h xfs: exact busy extent tracking 2011-04-28 13:18:04 -05:00
xfs_log_recover.c xfs: reset buffer pointers before freeing them 2011-05-19 12:03:45 -05:00
xfs_log_recover.h
xfs_log.c xfs: reset buffer pointers before freeing them 2011-05-19 12:03:45 -05:00
xfs_log.h xfs: exact busy extent tracking 2011-04-28 13:18:04 -05:00
xfs_mount.c xfs: cleanup duplicate initializations 2011-04-28 13:25:29 -05:00
xfs_mount.h xfs: introduce background inode reclaim work 2011-04-08 12:45:07 +10:00
xfs_mru_cache.c xfs: convert to alloc_workqueue() 2011-02-01 11:42:43 +01:00
xfs_mru_cache.h
xfs_quota.h xfs: Convert xlog_warn to new logging interface 2011-03-07 10:01:35 +11:00
xfs_rename.c
xfs_rtalloc.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_rtalloc.h xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_rw.c xfs: Convert remaining cmn_err() callers to new API 2011-03-07 10:08:35 +11:00
xfs_rw.h
xfs_sb.h
xfs_trans_ail.c xfs: fix race condition in AIL push trigger 2011-05-09 12:17:04 -05:00
xfs_trans_buf.c xfs: xfs_trans_read_buf() should return an error on failure 2011-03-26 09:14:44 +11:00
xfs_trans_extfree.c
xfs_trans_inode.c Fix common misspellings 2011-03-31 11:26:23 -03:00
xfs_trans_priv.h xfs: push the AIL from memory reclaim and periodic sync 2011-04-08 12:45:07 +10:00
xfs_trans_space.h
xfs_trans.c xfs: reduce the number of pagb_lock roundtrips in xfs_alloc_clear_busy 2011-04-28 13:18:09 -05:00
xfs_trans.h xfs: more sensible inode refcounting for ialloc 2011-02-22 20:32:28 -06:00
xfs_types.h xfs: exact busy extent tracking 2011-04-28 13:18:04 -05:00
xfs_utils.c
xfs_utils.h
xfs_vnodeops.c Fix common misspellings 2011-03-31 11:26:23 -03:00
xfs_vnodeops.h xfs: preallocation transactions do not need to be synchronous 2011-03-26 09:13:08 +11:00
xfs.h