Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpf_tracing_prog_attach The following case can cause a crash due to missing attach_btf: 1) load rawtp program 2) load fentry program with rawtp as target_fd 3) create tracing link for fentry program with target_fd = 0 4) repeat 3 In the end we have: - prog->aux->dst_trampoline == NULL - tgt_prog == NULL (because we did not provide target_fd to link_create) - prog->aux->attach_btf == NULL (the program was loaded with attach_prog_fd=X) - the program was loaded for tgt_prog but we have no way to find out which one BUG: kernel NULL pointer dereference, address: 0000000000000058 Call Trace: <TASK> ? __die+0x20/0x70 ? page_fault_oops+0x15b/0x430 ? fixup_exception+0x22/0x330 ? exc_page_fault+0x6f/0x170 ? asm_exc_page_fault+0x22/0x30 ? bpf_tracing_prog_attach+0x279/0x560 ? btf_obj_id+0x5/0x10 bpf_tracing_prog_attach+0x439/0x560 __sys_bpf+0x1cf4/0x2de0 __x64_sys_bpf+0x1c/0x30 do_syscall_64+0x41/0xf0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 Return -EINVAL in this situation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f3a95075549e0e5c36db922caf86847db7a35403 before a7b98aa10f895e2569403896f2d19b73b6c95653; affected f3a95075549e0e5c36db922caf86847db7a35403 before 6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0; affected f3a95075549e0e5c36db922caf86847db7a35403 before 8c8bcd45e9b10eef12321f08d2e5be33d615509c; affected f3a95075549e0e5c36db922caf86847db7a35403 before 50ae82f080cf87e84828f066c31723b781d68f5b; affected f3a95075549e0e5c36db922caf86847db7a35403 before 715d82ba636cb3629a6e18a33bb9dbe53f9936ee |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 5.15.148 through 5.15.*; unaffected 6.1.75 through 6.1.*; unaffected 6.6.14 through 6.6.*; unaffected 6.7.2 through 6.7.*; unaffected 6.8 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653
- https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0
- https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c
- https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b
- https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653
- https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0
- https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c
- https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b
- https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee