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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2018-12-04 15:06:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-13 10:07:12 +0100 |
| commit | 69473af5e6dc07348385e8d011dd0d3b0d95f07a (patch) | |
| tree | b2df7d2deecf0d8e2d4709485402329102b36744 | |
| parent | dc64743ba847537fe4ae7189bd753002bbd41aaa (diff) | |
| download | linux-stable-69473af5e6dc07348385e8d011dd0d3b0d95f07a.tar.gz linux-stable-69473af5e6dc07348385e8d011dd0d3b0d95f07a.tar.bz2 linux-stable-69473af5e6dc07348385e8d011dd0d3b0d95f07a.zip | |
gfs2: Fix loop in gfs2_rbm_find
commit 2d29f6b96d8f80322ed2dd895bca590491c38d34 upstream.
Fix the resource group wrap-around logic in gfs2_rbm_find that commit
e579ed4f44 broke. The bug can lead to unnecessary repeated scanning of the
same bitmaps; there is a risk that future changes will turn this into an
endless loop.
Fixes: e579ed4f44 ("GFS2: Introduce rbm field bii")
Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/gfs2/rgrp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 7474c413ffd1..dbae3a7dd9ff 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1671,9 +1671,9 @@ static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 *minext, goto next_iter; } if (ret == -E2BIG) { + n += rbm->bii - initial_bii; rbm->bii = 0; rbm->offset = 0; - n += (rbm->bii - initial_bii); goto res_covered_end_of_rgrp; } return ret; |