crush: fix a bug in tree bucket decode

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commit 82cd003a77 upstream.

struct crush_bucket_tree::num_nodes is u8, so ceph_decode_8_safe()
should be used.  -Wconversion catches this, but I guess it went
unnoticed in all the noise it spews.  The actual problem (at least for
common crushmaps) isn't the u32 -> u8 truncation though - it's the
advancement by 4 bytes instead of 1 in the crushmap buffer.

Fixes: http://tracker.ceph.com/issues/2759

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Josh Durgin <jdurgin@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Ilya Dryomov 2015-06-29 19:30:23 +03:00 • committed by Luis Henriques

parent 1548a5365e

commit 9db73e33ec

1 changed files with 1 additions and 1 deletions

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net/ceph/osdmap.c

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