5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Gleixner tglx@linutronix.de
[ Upstream commit fe513c2ef0a172a58f158e2e70465c4317f0a9a2 ]
static_call_module_notify() triggers a WARN_ON(), when memory allocation fails in __static_call_add_module().
That's not really justified, because the failure case must be correctly handled by the well known call chain and the error code is passed through to the initiating userspace application.
A memory allocation fail is not a fatal problem, but the WARN_ON() takes the machine out when panic_on_warn is set.
Replace it with a pr_warn().
Fixes: 9183c3f9ed71 ("static_call: Add inline static call infrastructure") Signed-off-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lkml.kernel.org/r/8734mf7pmb.ffs@tglx Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/static_call_inline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/static_call_inline.c b/kernel/static_call_inline.c index 075194d9cbf5b..6f566fe27ec1d 100644 --- a/kernel/static_call_inline.c +++ b/kernel/static_call_inline.c @@ -442,7 +442,7 @@ static int static_call_module_notify(struct notifier_block *nb, case MODULE_STATE_COMING: ret = static_call_add_module(mod); if (ret) { - WARN(1, "Failed to allocate memory for static calls"); + pr_warn("Failed to allocate memory for static calls\n"); static_call_del_module(mod); } break;