Commit d7f651ad authored Nov 10, 2016 by Jinshan Xiong Committed by Greg Kroah-Hartman Nov 14, 2016

staging: lustre: osc: osc_extent should hold refcount to osc_object



To avoid a race that osc_extent and osc_object destroy happens on the
same time, which causes kernel crash.

Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7164
Reviewed-on: http://review.whamcloud.com/16433


Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent a80ba5fe

drivers/staging/lustre/lustre/osc/osc_cache.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -360,6 +360,7 @@ static struct osc_extent osc_extent_alloc(struct osc_object obj)

		RB_CLEAR_NODE(&ext->oe_node);
		ext->oe_obj = obj;
		cl_object_get(osc2cl(obj));
		atomic_set(&ext->oe_refc, 1);
		atomic_set(&ext->oe_users, 0);
		INIT_LIST_HEAD(&ext->oe_link);
		@@ -398,6 +399,7 @@ static void osc_extent_put(const struct lu_env env, struct osc_extent ext)
		LDLM_LOCK_PUT(ext->oe_dlmlock);
		ext->oe_dlmlock = NULL;
		}
		cl_object_put(env, osc2cl(ext->oe_obj));
		osc_extent_free(ext);
		}
		}

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