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Vulnerability CVE-2024-42151
Published: 2024-07-30
| Description: |
In the Linux kernel, the following vulnerability has been resolved:
bpf: mark bpf_dummy_struct_ops.test_1 parameter as nullable
Test case dummy_st_ops/dummy_init_ret_value passes NULL as the first
parameter of the test_1() function. Mark this parameter as nullable to
make verifier aware of such possibility.
Otherwise, NULL check in the test_1() code:
SEC("struct_ops/test_1")
int BPF_PROG(test_1, struct bpf_dummy_ops_state *state)
{
if (!state)
return ...;
... access state ...
}
Might be removed by verifier, thus triggering NULL pointer dereference
under certain conditions. |
References: |
https://git.kernel.org/stable/c/7f79097b0de97a486b137b750d7dd7b20b519d23
https://git.kernel.org/stable/c/1479eaff1f16983d8fda7c5a08a586c21891087d
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