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rcutorture: Handle failure of memory allocation functions

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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>
This commit is contained in:
Li Qiong 2022-06-12 14:48:25 +08:00 committed by Paul E. McKenney
parent 3002153a91
commit 1a5ca5e098
1 changed files with 10 additions and 0 deletions
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10
kernel/rcu/rcutorture.c
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@ -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);