Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will likely cause the call to trace_rxrpc_rx_done() to oops. Fix this by moving the unsharing down to where rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an unshare is then avoided. And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer to the packet, so change that to just a pointer.
Product status
2d1faf7a0ca3c0b327cf064c80e4e775532c9319 (git) before e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
2d1faf7a0ca3c0b327cf064c80e4e775532c9319 (git) before bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
2d1faf7a0ca3c0b327cf064c80e4e775532c9319 (git) before 996b0487b3cdda4c91811dbb1c9564626bc840bd
2d1faf7a0ca3c0b327cf064c80e4e775532c9319 (git) before 8fde6296c4d4da2be7ab761305ab7f232b94eefd
2d1faf7a0ca3c0b327cf064c80e4e775532c9319 (git) before 1f2740150f904bfa60e4bad74d65add3ccb5e7f8
6.2
Any version before 6.2
6.6.140 (semver)
6.12.86 (semver)
6.18.27 (semver)
7.0.4 (semver)
7.1-rc1 (original_commit_for_fix)
References
git.kernel.org/...c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
git.kernel.org/...c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
git.kernel.org/...c/996b0487b3cdda4c91811dbb1c9564626bc840bd
git.kernel.org/...c/8fde6296c4d4da2be7ab761305ab7f232b94eefd
git.kernel.org/...c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8