Btrfs: error out if generic_bin_search get invalid arguments

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With btrfs-corrupt-block, one can set btree node/leaf's field, if
we assign a negative value to node/leaf, we can get various hangs,
eg. if extent_root's nritems is -2ULL, then we get stuck in
 btrfs_read_block_groups() because it has a while loop and
btrfs_search_slot() on extent_root will always return the first
 child.

This lets us know what's happening and returns a EINVAL to callers
instead of returning the first item.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Liu Bo 2016-06-23 16:32:45 -07:00 • committed by David Sterba

parent 6fb37b756a

commit 5e24e9af01

1 changed files with 8 additions and 0 deletions

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fs/btrfs/ctree.c

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