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Description: perf: Fix sys_perf_event_open() race against self
References:
https://lore.kernel.org/all/20220520183806.GV2578@worktop.programming.kicks-ass.net/T/#u
https://www.openwall.com/lists/oss-security/2022/05/20/2
https://www.openwall.com/lists/oss-security/2022/06/30/2
Notes:
carnil> Issue rendered harmless for exploition due to
carnil> kernel.perf_event_paranoid >= 3 setting.
carnil> For 5.17.y fixed as well in 5.17.10.
Bugs:
upstream: released (5.18) [3ac6487e584a1eb54071dbe1212e05b884136704]
5.10-upstream-stable: released (5.10.118) [3ee8e109c3c316073a3e0f83ec0769c7ee8a7375]
4.19-upstream-stable: released (4.19.245) [6cdd53a49aa7413e53c14ece27d826f0b628b18a]
4.9-upstream-stable: released (4.9.316) [a1466528d8ae5d9a3bb29781f0098fa3476e9e1c]
sid: released (5.17.11-1)
5.10-bullseye-security: released (5.10.120-1)
4.19-buster-security: released (4.19.249-1)
4.9-stretch-security: released (4.9.320-2)
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