| commit | 78256de9a8d93c7d61ed847c7826caa11d35ab8c | |
| author | Andreas Gruenbacher <agruenba@redhat.com> | |
| Fri, 7 Jul 2017 18:22:05 +0000 (7 13:22 -0500) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Wed, 12 Jul 2017 14:53:57 +0000 (12 16:53 +0200) | ||
| tree | d73e286aa45eb988ff7fe2c1a361b208294dc69c | treesnapshot (tar.gz zip) |
| parent | 9b4adf4902b1b29c4a28959d7021d31665f3c95a | commitdiff |
gfs2: Fix glock rhashtable rcu bug
commit 961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74 upstream.
Before commit 88ffbf3e03 "GFS2: Use resizable hash table for glocks",
glocks were freed via call_rcu to allow reading the glock hashtable
locklessly using rcu. This was then changed to free glocks immediately,
which made reading the glock hashtable unsafe. Bring back the original
code for freeing glocks via call_rcu.
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>
commit 961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74 upstream.
Before commit 88ffbf3e03 "GFS2: Use resizable hash table for glocks",
glocks were freed via call_rcu to allow reading the glock hashtable
locklessly using rcu. This was then changed to free glocks immediately,
which made reading the glock hashtable unsafe. Bring back the original
code for freeing glocks via call_rcu.
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>
| fs/gfs2/glock.c | diffblobblamehistory | |
| fs/gfs2/incore.h | diffblobblamehistory |