gfs2: fix gfs2_find_jhead that returns uninitialized jhead with seq 0

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commit 7582026f6f upstream.

When the first log header in a journal happens to have a sequence
number of 0, a bug in gfs2_find_jhead() causes it to prematurely exit,
and return an uninitialized jhead with seq 0. This can cause failures
in the caller. For instance, a mount fails in one test case.

The correct behavior is for it to continue searching through the journal
to find the correct journal head with the highest sequence number.

Fixes: f4686c26ec ("gfs2: read journal in large chunks")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Abhi Das 2020-02-04 14:14:56 -06:00 • committed by Greg Kroah-Hartman

parent 76b7847204

commit 87c6124ed2

1 changed files with 1 additions and 1 deletions

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fs/gfs2/lops.c

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