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bpf, inode_storage: Put file handler if no storage was found

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[ Upstream commit b9557caaf872271671bdc1ef003d72f421eb72f6 ]

Put file f if inode_storage_ptr() returns NULL.

Fixes: 8ea636848aca ("bpf: Implement bpf_local_storage for inodes")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20210121020856.25507-1-bianpan2016@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pan Bian 2021-01-20 18:08:56 -08:00 committed by Greg Kroah-Hartman
parent 9447d0f8a6
commit 571fe1ba22
1 changed files with 5 additions and 1 deletions
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6
kernel/bpf/bpf_inode_storage.c
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@ -125,8 +125,12 @@ static int bpf_fd_inode_storage_update_elem(struct bpf_map *map, void *key,
fd = *(int *)key;
f = fget_raw(fd);
if (!f || !inode_storage_ptr(f->f_inode))
if (!f)
return -EBADF;
if (!inode_storage_ptr(f->f_inode)) {
fput(f);
return -EBADF;
}
sdata = bpf_local_storage_update(f->f_inode,
(struct bpf_local_storage_map *)map,