Commits
Andrii Nakryiko committed 188aae1f3d5
bpf: Initialize storage pointers to NULL to prevent freeing garbage pointer commit 62039c30c19dcab96621e074aeeb90da7100def7 upstream. Local storage array isn't initialized, so if cgroup storage allocation fails for BPF_CGROUP_STORAGE_SHARED, error handling code will attempt to free uninitialized pointer for BPF_CGROUP_STORAGE_PERCPU storage type. Avoid this by always initializing storage pointers to NULLs. Fixes: 8bad74f9840f ("bpf: extend cgroup bpf core to allow multiple cgroup storage types") Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200309222756.1018737-1-andriin@fb.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>