Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog Syzbot reported [1] crash that happens for following tracing scenario: - create tracepoint perf event with attr.inherit=1, attach it to the process and set bpf program to it - attached process forks -> chid creates inherited event the new child event shares the parent's bpf program and tp_event (hence prog_array) which is global for tracepoint - exit both process and its child -> release both events - first perf_event_detach_bpf_prog call will release tp_event->prog_array and second perf_event_detach_bpf_prog will crash, because tp_event->prog_array is NULL The fix makes sure the perf_event_detach_bpf_prog checks prog_array is valid before it tries to remove the bpf program from it. [1] https://lore.kernel.org/bpf/Z1MR6dCIKajNS6nU@krava/T/#m91dbf0688221ec7a7fc95e896a7ef9ff93b0b8ad
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7a5c653ede645693422e43cccaa3e8f905d21c74 before 842e5af282453983586e2eae3c8eaf252de5f22f; affected 21db2f35fa97e4a3447f2edeb7b2569a8bfdc83b before c2b6b47662d5f2dfce92e5ffbdcac8229f321d9d; affected 0ee288e69d033850bc87abe0f9cc3ada24763d7f before dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3; affected 0ee288e69d033850bc87abe0f9cc3ada24763d7f before 978c4486cca5c7b9253d3ab98a88c8e769cb9bbd; affected b4007d5fe38625b8a1b8edc0f385d86527651238; affected 585674b9d0d80bd7f428b1f88be13cf6d5d6f739; affected 6.1.115 before 6.1.121; affected 6.6.59 before 6.6.67; affected 5.15.170 before 5.16; affected 6.11.6 before 6.12 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.1.121 through 6.1.*; unaffected 6.6.67 through 6.6.*; unaffected 6.12.6 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/842e5af282453983586e2eae3c8eaf252de5f22f
- https://git.kernel.org/stable/c/c2b6b47662d5f2dfce92e5ffbdcac8229f321d9d
- https://git.kernel.org/stable/c/dfb15ddf3b65e0df2129f9756d1b4fa78055cdb3
- https://git.kernel.org/stable/c/978c4486cca5c7b9253d3ab98a88c8e769cb9bbd
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.