bpf: Check IS_ERR for the bpf_map_get() return value

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This patch fixes a mistake in checking NULL instead of
checking IS_ERR for the bpf_map_get() return value.

It also fixes the return value in link_update_map() from -EINVAL
to PTR_ERR(*_map).

Reported-by: syzbot+71ccc0fe37abb458406b@syzkaller.appspotmail.com
Fixes: 68b04864ca ("bpf: Create links for BPF struct_ops maps.")
Fixes: aef56f2e91 ("bpf: Update the struct_ops of a bpf_link.")
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Acked-by: Kui-Feng Lee <kuifeng@meta.com>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20230324184241.1387437-1-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Martin KaFai Lau 2023-03-24 11:42:41 -07:00 • committed by Alexei Starovoitov

parent 226bc6ae64

commit 55fbae0547

2 changed files with 4 additions and 4 deletions

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4

kernel/bpf/bpf_struct_ops.c

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4

kernel/bpf/syscall.c

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