Medium · published October 21, 2024
In the Linux kernel, the following vulnerability has been resolved:
net: stmmac: Fix zero-division error when disabling tc cbs
The commit b8c43360f6e4 ("net: stmmac: No need to calculate speed divider
when offload is disabled") allows the "port_transmit_rate_kbps" to be
set to a value of 0, which is then passed to the "div_s64" function when
tc-cbs is disabled. This leads to a zero-division error.
When tc-cbs is disabled, the idleslope, sendslope, and credit values the
credit values are not required to be configured. Therefore, adding a return
statement after setting the txQ mode to DCB when tc-cbs is disabled would
prevent a zero-division error.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 5.10.221, < 5.10.227 | 5.10.227 |
| linux/linux_kernel | ≥ 5.15.162, < 5.15.168 | 5.15.168 |
| linux/linux_kernel | ≥ 6.1.96, < 6.1.113 | 6.1.113 |
| linux/linux_kernel | ≥ 6.6.36, < 6.6.55 | 6.6.55 |
| linux/linux_kernel | ≥ 6.9.7, < 6.10 | 6.10 |
| linux/linux_kernel | ≥ 6.10, < 6.10.14 | 6.10.14 |
| linux/linux_kernel | ≥ 6.11, < 6.11.3 | 6.11.3 |