Description: net/can/isotp: race condition leads to local privilege escalation References: https://www.openwall.com/lists/oss-security/2021/05/11/16 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=2b17c400aeb44daf041627722581ade527bb3c1d Notes: carnil> Introduced by 921ca574cd38 ("can: isotp: add SF_BROADCAST carnil> support for functional addressing") in 5.11-rc1. carnil> In 5.10.102 was added both the introducing and fixing commit, carnil> so the issue was never present here. Bugs: upstream: released (5.13-rc4) [2b17c400aeb44daf041627722581ade527bb3c1d] 5.10-upstream-stable: N/A "Vulnerable code introduced later" 4.19-upstream-stable: N/A "Vulnerable code introduced later" 4.9-upstream-stable: N/A "Vulnerable code introduced later" sid: N/A "Vulnerable code introduced later" 4.19-buster-security: N/A "Vulnerable code introduced later" 4.9-stretch-security: N/A "Vulnerable code introduced later"