bpf: Change inode_storage's lookup_elem return value from NULL to -EBADF

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bpf_fd_inode_storage_lookup_elem() returned NULL when getting a bad FD,
which caused -ENOENT in bpf_map_copy_value. -EBADF error is better than
-ENOENT for a bad FD behaviour.

The patch was partially contributed by CyberArk Software, Inc.

Fixes: 8ea636848a ("bpf: Implement bpf_local_storage for inodes")
Signed-off-by: Tal Lossos <tallossos@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20210307120948.61414-1-tallossos@gmail.com

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Tal Lossos 2021-03-07 14:09:48 +02:00 • committed by Daniel Borkmann

parent 350a5c4dd2

commit 769c18b254

1 changed files with 1 additions and 1 deletions

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kernel/bpf/bpf_inode_storage.c

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