CVE-2023-52887

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new<br /> <br /> This patch enhances error handling in scenarios with RTS (Request to<br /> Send) messages arriving closely. It replaces the less informative WARN_ON_ONCE<br /> backtraces with a new error handling method. This provides clearer error<br /> messages and allows for the early termination of problematic sessions.<br /> Previously, sessions were only released at the end of j1939_xtp_rx_rts().<br /> <br /> Potentially this could be reproduced with something like:<br /> testj1939 -r vcan0:0x80 &amp;<br /> while true; do<br /> # send first RTS<br /> cansend vcan0 18EC8090#1014000303002301;<br /> # send second RTS<br /> cansend vcan0 18EC8090#1014000303002301;<br /> # send abort<br /> cansend vcan0 18EC8090#ff00000000002301;<br /> done