Description
In the Linux kernel, the following vulnerability has been resolved: net, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket When using a BPF program on kernel_connect(), the call can return -EPERM. This causes xs_tcp_setup_socket() to loop forever, filling up the syslog and causing the kernel to potentially freeze up. Neil suggested: This will propagate -EPERM up into other layers which might not be ready to handle it. It might be safer to map EPERM to an error we would be more likely to expect from the network system - such as ECONNREFUSED or ENETDOWN. ECONNREFUSED as error seems reasonable. For programs setting a different error can be out of reach (see handling in 4fbac77d2d09) in particular on kernels which do not have f10d05966196 ("bpf: Make BPF_PROG_RUN_ARRAY return -err instead of allow boolean"), thus given that it is better to simply remap for consistent behavior. UDP does handle EPERM in xs_udp_send_request().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4fbac77d2d092b475dda9eea66da674369665427 to < bc790261218952635f846aaf90bcc0974f6f62c6affected4fbac77d2d092b475dda9eea66da674369665427 to < 934247ea65bc5eca8bdb7f8c0ddc15cef992a5d6affected4fbac77d2d092b475dda9eea66da674369665427 to < 02ee1976edb21a96ce8e3fd4ef563f14cc16d041affected4fbac77d2d092b475dda9eea66da674369665427 to < 5d8254e012996cee1a0f9cc920531cb7e4d9a011affected4fbac77d2d092b475dda9eea66da674369665427 to < f2431e7db0fe0daccb2f06bb0d23740affcd2fa6affected4fbac77d2d092b475dda9eea66da674369665427 to < d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414affected4fbac77d2d092b475dda9eea66da674369665427 to < f388cfd913a2b96c05339a335f365795db1b36b6affected4fbac77d2d092b475dda9eea66da674369665427 to < 626dfed5fa3bfb41e0dffd796032b555b69f9cdeaffected
Linux Linux
Default version status: affected
4.17affected0 to < 4.17unaffected4.19.322 to ≤ 4.19.*unaffected5.4.284 to ≤ 5.4.*unaffected5.10.226 to ≤ 5.10.*unaffected5.15.167 to ≤ 5.15.*unaffected6.1.100 to ≤ 6.1.*unaffected6.6.41 to ≤ 6.6.*unaffected6.9.10 to ≤ 6.9.*unaffected6.10 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/bc790261218952635f846aaf90bcc0974f6f62c6 ↗
- https://git.kernel.org/stable/c/934247ea65bc5eca8bdb7f8c0ddc15cef992a5d6 ↗
- https://git.kernel.org/stable/c/02ee1976edb21a96ce8e3fd4ef563f14cc16d041 ↗
- https://git.kernel.org/stable/c/5d8254e012996cee1a0f9cc920531cb7e4d9a011 ↗
- https://git.kernel.org/stable/c/f2431e7db0fe0daccb2f06bb0d23740affcd2fa6 ↗
- https://git.kernel.org/stable/c/d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414 ↗
- https://git.kernel.org/stable/c/f388cfd913a2b96c05339a335f365795db1b36b6 ↗
- https://git.kernel.org/stable/c/626dfed5fa3bfb41e0dffd796032b555b69f9cde ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html ↗