Description
In the Linux kernel, the following vulnerability has been resolved: e1000/e1000e: Fix leak in DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented after a successful mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping would leak. In these commits, a faulty while condition caused an infinite loop in dma_error: Commit 03b1320dfcee ("e1000e: remove use of skb_dma_map from e1000e driver") Commit 602c0554d7b0 ("e1000: remove use of skb_dma_map from e1000 driver") Commit c1fa347f20f1 ("e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of unsigned in *_tx_map()") fixed the infinite loop, but introduced the off-by-one error. This issue may still exist in the igbvf driver, but I did not address it in this patch.
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
c1fa347f20f17f14a4a1575727fa24340e8a9117 to < 7eaeb778bfaa3b2a804f89321c234d59c74569dbaffectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < 0606c24a745bafd1be5d66c48361638cd9cad74baffectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < 519051c711dfd239ef6e4b28878efee400a035f9affectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < 0a1fc25deabab4efce64610e3c449485c4fa8f5faffectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < fa5ba9867a55e640df0dc79bf0199770fb043f03affectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < 30e87ade8d678c25a8546cf38c0b498fa5cb27d3affectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < 10b5e65959e955a1c8894e0a5413944b5a70204aaffectedc1fa347f20f17f14a4a1575727fa24340e8a9117 to < e94eaef11142b01f77bf8ba4d0b59720b7858109affected
Linux Linux
Default version status: affected
2.6.33affected0 to < 2.6.33unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.167 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.78 to ≤ 6.12.*unaffected6.18.19 to ≤ 6.18.*unaffected6.19.9 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db ↗
- https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b ↗
- https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9 ↗
- https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f ↗
- https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03 ↗
- https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3 ↗
- https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a ↗
- https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109 ↗