From: Thomas Gleixner tglx@linutronix.de

stable inclusion from stable-v6.6.55 commit e67534bd31d79952b50e791e92adf0b3e6c13b8c category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRDC

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

--------------------------------

[ 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 Signed-off-by: Liao Chen liaochen4@huawei.com --- 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 f55354ccf16b..c46825692c04 100644 --- a/kernel/static_call_inline.c +++ b/kernel/static_call_inline.c @@ -437,7 +437,7 @@ 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;