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Code Issues Releases Wiki Activity

bpf: Suppress 'passing zero to PTR_ERR' warning

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

Fixes: c0a5a21c25 ("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
This commit is contained in:
Kumar Kartikeya Dwivedi 2022-05-21 18:56:20 +05:30 committed by Daniel Borkmann
parent fe736565ef
commit 1ec5ee8c8a
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/verifier.c
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@ -5352,7 +5352,7 @@ static int process_kptr_func(struct bpf_verifier_env *env, int regno,
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);