Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sfc: fix crash when reading stats while NIC is resetting efx_net_stats() (.ndo_get_stats64) can be called during an ethtool selftest, during which time nic_data->mc_stats is NULL as the NIC has been fini'd. In this case do not attempt to fetch the latest stats from the hardware, else we will crash on a NULL dereference: BUG: kernel NULL pointer dereference, address: 0000000000000038 RIP efx_nic_update_stats abridged calltrace: efx_ef10_update_stats_pf efx_net_stats dev_get_stats dev_seq_printf_stats Skipping the read is safe, we will simply give out stale stats. To ensure that the free in efx_ef10_fini_nic() does not race against efx_ef10_update_stats_pf(), which could cause a TOCTTOU bug, take the efx->stats_lock in fini_nic (it is already held across update_stats).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d3142c193dca9a2f6878f4128ce1aaf221bb3f99 before cb1aa7cc562cab6a87ea33574c8c65f2d2fd7aeb; affected d3142c193dca9a2f6878f4128ce1aaf221bb3f99 before 91f4ef204e731565afdc6c2a7fcf509a3fd6fd67; affected d3142c193dca9a2f6878f4128ce1aaf221bb3f99 before 446f5567934331923d0aec4ce045e4ecb0174aae; affected d3142c193dca9a2f6878f4128ce1aaf221bb3f99 before 470152d76b3ed107d172ea46acc4bfa941f20b4b; affected d3142c193dca9a2f6878f4128ce1aaf221bb3f99 before aba32b4c58112960c0c708703ca6b44dc8944082; affected d3142c193dca9a2f6878f4128ce1aaf221bb3f99 before d1b355438b8325a486f087e506d412c4e852f37b |
| Linux / Linux | affected 5.9; unaffected 0 before 5.9; unaffected 5.10.188 through 5.10.*; unaffected 5.15.121 through 5.15.*; unaffected 6.1.39 through 6.1.*; unaffected 6.3.13 through 6.3.*; unaffected 6.4.4 through 6.4.*; unaffected 6.5 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/cb1aa7cc562cab6a87ea33574c8c65f2d2fd7aeb
- https://git.kernel.org/stable/c/91f4ef204e731565afdc6c2a7fcf509a3fd6fd67
- https://git.kernel.org/stable/c/446f5567934331923d0aec4ce045e4ecb0174aae
- https://git.kernel.org/stable/c/470152d76b3ed107d172ea46acc4bfa941f20b4b
- https://git.kernel.org/stable/c/aba32b4c58112960c0c708703ca6b44dc8944082
- https://git.kernel.org/stable/c/d1b355438b8325a486f087e506d412c4e852f37b
ADP enrichment
No English description supplied.
No references supplied.