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scftorture: Forgive memory-allocation failure if KASAN

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[ Upstream commit 013608cd08 ]

Kernels built with CONFIG_KASAN=y quarantine newly freed memory in order
to better detect use-after-free errors.  However, this can exhaust memory
more quickly in allocator-heavy tests, which can result in spurious
scftorture failure.  This commit therefore forgives memory-allocation
failure in kernels built with CONFIG_KASAN=y, but continues counting
the errors for use in detailed test-result analyses.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Paul E. McKenney 2023-05-15 19:00:10 -07:00 committed by Greg Kroah-Hartman
parent 4f03fba096
commit f685311dbe
1 changed files with 4 additions and 2 deletions
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6
kernel/scftorture.c
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@ -175,7 +175,8 @@ static void scf_torture_stats_print(void)
scfs.n_all_wait += scf_stats_p[i].n_all_wait; scfs.n_all_wait += scf_stats_p[i].n_all_wait;
} }
if (atomic_read(&n_errs) || atomic_read(&n_mb_in_errs) || if (atomic_read(&n_errs) || atomic_read(&n_mb_in_errs) ||
atomic_read(&n_mb_out_errs) || atomic_read(&n_alloc_errs)) atomic_read(&n_mb_out_errs) ||
(!IS_ENABLED(CONFIG_KASAN) && atomic_read(&n_alloc_errs)))
bangstr = "!!! "; bangstr = "!!! ";
pr_alert("%s %sscf_invoked_count %s: %lld resched: %lld single: %lld/%lld single_ofl: %lld/%lld single_rpc: %lld single_rpc_ofl: %lld many: %lld/%lld all: %lld/%lld ", pr_alert("%s %sscf_invoked_count %s: %lld resched: %lld single: %lld/%lld single_ofl: %lld/%lld single_rpc: %lld single_rpc_ofl: %lld many: %lld/%lld all: %lld/%lld ",
SCFTORT_FLAG, bangstr, isdone ? "VER" : "ver", invoked_count, scfs.n_resched, SCFTORT_FLAG, bangstr, isdone ? "VER" : "ver", invoked_count, scfs.n_resched,
@ -327,7 +328,8 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
preempt_disable(); preempt_disable();
if (scfsp->scfs_prim == SCF_PRIM_SINGLE || scfsp->scfs_wait) { if (scfsp->scfs_prim == SCF_PRIM_SINGLE || scfsp->scfs_wait) {
scfcp = kmalloc(sizeof(*scfcp), GFP_ATOMIC); scfcp = kmalloc(sizeof(*scfcp), GFP_ATOMIC);
if (WARN_ON_ONCE(!scfcp)) { if (!scfcp) {
WARN_ON_ONCE(!IS_ENABLED(CONFIG_KASAN));
atomic_inc(&n_alloc_errs); atomic_inc(&n_alloc_errs);
} else { } else {
scfcp->scfc_cpu = -1; scfcp->scfc_cpu = -1;