Description
In the Linux kernel, the following vulnerability has been resolved: dlm: fix add msg handle in send_queue ordered In a benchmark scenario triggering a lot of requests that triggers a lot of DLM messages on the network it can be that the mh->seq is not ordered according the oldest seq number. This ordering is required by dlm_receive_ack as "before(mh->seq, seq)" will stop to check for older sequence numbers that are ordered in the tail of "node->send_queue". The side effects of not having it correct ordered regarding "before(mh->seq, seq)" are refcounting issues and use-after free. I only was able to reproduce this issue in a experimental DLM branch and a user space DLM benchmark that uses io_uring. After changing this I don't experienced any refcounting with the sending buffer issues anymore.
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
489d8e559c6596eb08e16447d9830bc39afbe54e to < 482606fea302d8bab86901d7426c3716980d99a8affected489d8e559c6596eb08e16447d9830bc39afbe54e to < ae9e534e502a0f48c12baf83608c5de0ff0eab11affected489d8e559c6596eb08e16447d9830bc39afbe54e to < 6369619f1b665f12d8c99cc6ff733c64eb08b22eaffected489d8e559c6596eb08e16447d9830bc39afbe54e to < 712714f818d83373847874ab0f8e426be79296cfaffected489d8e559c6596eb08e16447d9830bc39afbe54e to < 4d45250b1d22960f86d83245be188b16e456218baffected489d8e559c6596eb08e16447d9830bc39afbe54e to < d2248cb70c070f8f04762872772e155b59016f17affected
Linux Linux
Default version status: affected
5.14affected0 to < 5.14unaffected6.1.191 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/482606fea302d8bab86901d7426c3716980d99a8 ↗
- https://git.kernel.org/stable/c/ae9e534e502a0f48c12baf83608c5de0ff0eab11 ↗
- https://git.kernel.org/stable/c/6369619f1b665f12d8c99cc6ff733c64eb08b22e ↗
- https://git.kernel.org/stable/c/712714f818d83373847874ab0f8e426be79296cf ↗
- https://git.kernel.org/stable/c/4d45250b1d22960f86d83245be188b16e456218b ↗
- https://git.kernel.org/stable/c/d2248cb70c070f8f04762872772e155b59016f17 ↗