Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH rcu 10/12] rcutorture: Handle failure of memory allocation functions | Date | Mon, 20 Jun 2022 15:58:15 -0700 |
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From: Li Qiong <liqiong@nfschina.com>
This commit adds warnings for allocation failure during the mem_dump_obj() tests. It also terminates these tests upon such failure.
Signed-off-by: Li Qiong <liqiong@nfschina.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> --- kernel/rcu/rcutorture.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index b896987c21122..e2db5d6beabaa 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1991,7 +1991,13 @@ static void rcu_torture_mem_dump_obj(void) static int z; kcp = kmem_cache_create("rcuscale", 136, 8, SLAB_STORE_USER, NULL); + if (WARN_ON_ONCE(!kcp)) + return; rhp = kmem_cache_alloc(kcp, GFP_KERNEL); + if (WARN_ON_ONCE(!rhp)) { + kmem_cache_destroy(kcp); + return; + } pr_alert("mem_dump_obj() slab test: rcu_torture_stats = %px, &rhp = %px, rhp = %px, &z = %px\n", stats_task, &rhp, rhp, &z); pr_alert("mem_dump_obj(ZERO_SIZE_PTR):"); mem_dump_obj(ZERO_SIZE_PTR); @@ -2008,6 +2014,8 @@ static void rcu_torture_mem_dump_obj(void) kmem_cache_free(kcp, rhp); kmem_cache_destroy(kcp); rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); + if (WARN_ON_ONCE(!rhp)) + return; pr_alert("mem_dump_obj() kmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); pr_alert("mem_dump_obj(kmalloc %px):", rhp); mem_dump_obj(rhp); @@ -2015,6 +2023,8 @@ static void rcu_torture_mem_dump_obj(void) mem_dump_obj(&rhp->func); kfree(rhp); rhp = vmalloc(4096); + if (WARN_ON_ONCE(!rhp)) + return; pr_alert("mem_dump_obj() vmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); pr_alert("mem_dump_obj(vmalloc %px):", rhp); mem_dump_obj(rhp); -- 2.31.1.189.g2e36527f23
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