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Commit 3701530a authored by Bob Peterson's avatar Bob Peterson Committed by Steven Whitehouse
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GFS2: Fix infinite loop in rbm_find 



This patch fixes an infinite loop in gfs2_rbm_find that was introduced
by the previous patch. The problem occurred when the length was less
than 3 but the rbm block was byte-aligned, causing it to improperly
return a extent length of zero, which caused it to spin.

Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
Tested-by: default avatarBob Peterson <rpeterso@redhat.com>
Tested-by: default avatarBarry Marson <bmarson@redhat.com>
parent ff7f4cb4

fs/gfs2/rgrp.c

+1 −0
Original line number Diff line number Diff line
@@ -329,6 +329,7 @@ static u32 gfs2_free_extlen(const struct gfs2_rbm *rrbm, u32 len) 
	    gfs2_unaligned_extlen(&rbm, 4 - n_unaligned, &len))

		goto out;



	n_unaligned = len & 3;

	/* Start is now byte aligned */

	while (len > 3) {

		start = rbm.bi->bi_bh->b_data;