Revision a1bb7d61233ba5fb5cd865f907a9ddcc8f8c02bd authored by Alan Jenkins on 14 February 2009, 01:01:14 UTC, committed by Linus Torvalds on 21 February 2009, 22:17:17 UTC
http://bugzilla.kernel.org/show_bug.cgi?id=12239 The image writing code dropped a reference to the current swap device. This doesn't show up if the hibernation succeeds - because it doesn't affect the image which gets resumed. But it means multiple _failed_ hibernations end up freeing the swap device while it is still use! swsusp_write() finds the block device for the swap file using swap_type_of(). It then uses blkdev_get() / blkdev_put() to open and close the block device. Unfortunately, blkdev_get() assumes ownership of the inode of the block_device passed to it. So blkdev_put() calls iput() on the inode. This is by design and other callers expect this behaviour. The fix is for swap_type_of() to take a reference on the inode using bdget(). Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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inode.c
/*
* inode.c
*
* Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
*/
#include <linux/fs.h>
#include "befs.h"
#include "inode.h"
/*
Validates the correctness of the befs inode
Returns BEFS_OK if the inode should be used, otherwise
returns BEFS_BAD_INODE
*/
int
befs_check_inode(struct super_block *sb, befs_inode * raw_inode,
befs_blocknr_t inode)
{
u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
u32 flags = fs32_to_cpu(sb, raw_inode->flags);
/* check magic header. */
if (magic1 != BEFS_INODE_MAGIC1) {
befs_error(sb,
"Inode has a bad magic header - inode = %lu", inode);
return BEFS_BAD_INODE;
}
/*
* Sanity check2: inodes store their own block address. Check it.
*/
if (inode != iaddr2blockno(sb, &ino_num)) {
befs_error(sb, "inode blocknr field disagrees with vfs "
"VFS: %lu, Inode %lu",
inode, iaddr2blockno(sb, &ino_num));
return BEFS_BAD_INODE;
}
/*
* check flag
*/
if (!(flags & BEFS_INODE_IN_USE)) {
befs_error(sb, "inode is not used - inode = %lu", inode);
return BEFS_BAD_INODE;
}
return BEFS_OK;
}
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