From: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Date: Sat, 21 May 2022 18:56:20 +0530
Subject: bpf: Suppress 'passing zero to PTR_ERR' warning
Patch-mainline: v5.19-rc1
Git-commit: 1ec5ee8c8a5a65ea377f8bea64bf4d5b743f6f79
References: jsc#PED-1377

Kernel Test Robot complains about passing zero to PTR_ERR for the said
line, suppress it by using PTR_ERR_OR_ZERO.

Fixes: c0a5a21c25f3 ("bpf: Allow storing referenced kptr in map")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220521132620.1976921-1-memxor@gmail.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 kernel/bpf/verifier.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -5352,7 +5352,7 @@ static int process_kptr_func(struct bpf_
 		return -EINVAL;
 	}
 	if (!map_value_has_kptrs(map_ptr)) {
-		ret = PTR_ERR(map_ptr->kptr_off_tab);
+		ret = PTR_ERR_OR_ZERO(map_ptr->kptr_off_tab);
 		if (ret == -E2BIG)
 			verbose(env, "map '%s' has more than %d kptr\n", map_ptr->name,
 				BPF_MAP_VALUE_OFF_MAX);