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[ Upstream commit f38e998fbbb5da6a097ecd4b2700ba95eabab0c9 ]
Pass a non-NULL minext to gfs2_rbm_find even for single-block allocations. In
gfs2_rbm_find, also set rgd->rd_extfail_pt when a single-block allocation
fails in a resource group: there is no reason for treating that case
differently. In gfs2_reservation_check_and_update, only check how many free
blocks we have if more than one block is requested; we already know there's at
least one free block.
In addition, when allocating N blocks fails in gfs2_rbm_find, we need to set
rd_extfail_pt to N - 1 rather than N: rd_extfail_pt defines the biggest
allocation that might still succeed.
Finally, reset rd_extfail_pt when updating the resource group statistics in
update_rgrp_lvb, as we already do in gfs2_rgrp_bh_get.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Stable-dep-of: 8877243beafa ("gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump")
Signed-off-by: Sasha Levin <sashal@kernel.org>
57c7b331f0