Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drop_monitor: perform u64_stats updates under IRQ-disabled section In net_dm_packet_trace_kfree_skb_hit() and net_dm_hw_trap_packet_probe(), u64_stats_update_begin() / u64_stats_inc() / u64_stats_update_end() were called after spin_unlock_irqrestore(&...drop_queue.lock, flags), when local IRQs had already been re-enabled. Tracepoint probes can execute in IRQ or softirq context. On 32-bit architectures, u64_stats_update_begin() disables preemption but not interrupts, relying on seqcount writes. If a nested interrupt occurs on the same CPU during the 64-bit stats update, the reentrant seqcount update can corrupt the seqcount state or stats value. Fix this by performing the 64-bit per-CPU stats update before releasing drop_queue.lock via spin_unlock_irqrestore(), ensuring local interrupts remain disabled during the u64_stats update.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e9feb58020f952f7d9de785ede9a7d54ab1eda5c before dd8472526a04f2185afd792b8041a912a7d75d85; affected e9feb58020f952f7d9de785ede9a7d54ab1eda5c before 3454c729ee8aa682ec871f1b174b047f731933ae; affected e9feb58020f952f7d9de785ede9a7d54ab1eda5c before be9b121894d6ad44f0011f79543a2e3245979497; affected e9feb58020f952f7d9de785ede9a7d54ab1eda5c before 7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04; affected e9feb58020f952f7d9de785ede9a7d54ab1eda5c before d5e2cd2bc8ae36617346b3a54ee9da61d866bf92; affected e9feb58020f952f7d9de785ede9a7d54ab1eda5c before fd098a23bf8fda7eae48db9b06e7c34fc4d228fa |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/dd8472526a04f2185afd792b8041a912a7d75d85
- https://git.kernel.org/stable/c/3454c729ee8aa682ec871f1b174b047f731933ae
- https://git.kernel.org/stable/c/be9b121894d6ad44f0011f79543a2e3245979497
- https://git.kernel.org/stable/c/7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04
- https://git.kernel.org/stable/c/d5e2cd2bc8ae36617346b3a54ee9da61d866bf92
- https://git.kernel.org/stable/c/fd098a23bf8fda7eae48db9b06e7c34fc4d228fa