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Patch in this message | | | From | "Levin, Alexander (Sasha Levin)" <> | Subject | [PATCH for 4.9 03/59] GFS2: Fix reference to ERR_PTR in gfs2_glock_iter_next | Date | Thu, 14 Sep 2017 15:51:05 +0000 |
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From: Dan Carpenter <dan.carpenter@oracle.com>
[ Upstream commit 14d37564fa3dc4e5d4c6828afcd26ac14e6796c5 ]
This patch fixes a place where function gfs2_glock_iter_next can reference an invalid error pointer.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- fs/gfs2/glock.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 7bff6f46f5da..95bc0ae71d81 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1820,16 +1820,18 @@ void gfs2_glock_exit(void) static void gfs2_glock_iter_next(struct gfs2_glock_iter *gi) { - do { - gi->gl = rhashtable_walk_next(&gi->hti); + while ((gi->gl = rhashtable_walk_next(&gi->hti))) { if (IS_ERR(gi->gl)) { if (PTR_ERR(gi->gl) == -EAGAIN) continue; gi->gl = NULL; + return; } - /* Skip entries for other sb and dead entries */ - } while ((gi->gl) && ((gi->sdp != gi->gl->gl_name.ln_sbd) || - __lockref_is_dead(&gi->gl->gl_lockref))); + /* Skip entries for other sb and dead entries */ + if (gi->sdp == gi->gl->gl_name.ln_sbd && + !__lockref_is_dead(&gi->gl->gl_lockref)) + return; + } } static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos) -- 2.11.0
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