Commit b73fce69 authored Feb 15, 2008 by Valerie Clement Committed by Theodore Ts'o Feb 15, 2008

ext4: Fix kernel BUG at fs/ext4/mballoc.c:910!



With the flex_bg feature enabled, a large file creation oopses the
kernel.   The BUG_ON is:
	BUG_ON(len >= EXT4_BLOCKS_PER_GROUP(sb));

As the allocation of the bitmaps and the inode table can be done
outside the block group with flex_bg, this allows to allocate up to
EXT4_BLOCKS_PER_GROUP blocks in a group.

This patch fixes the oops.

Signed-off-by: Valerie Clement <valerie.clement@bull.net>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

parent 55bd725a

fs/ext4/mballoc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -906,7 +906,7 @@ static void ext4_mb_mark_free_simple(struct super_block *sb,
		unsigned short chunk;
		unsigned short border;

		BUG_ON(len >= EXT4_BLOCKS_PER_GROUP(sb));
		BUG_ON(len > EXT4_BLOCKS_PER_GROUP(sb));

		border = 2 << sb->s_blocksize_bits;

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