Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.

References 5

• git.kernel.org https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a
• git.kernel.org https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414
• git.kernel.org https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced
• git.kernel.org https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56
• git.kernel.org https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a

Remediation