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Description: eBPF 32-bit source register truncation on div/mod
References:
https://www.openwall.com/lists/oss-security/2021/06/23/1
Notes:
carnil> Introduced by 68fda450a7df ("bpf: fix 32-bit divide by zero")
carnil> in 4.15-rc9 (and was backported to 4.9.79). Though the specifc
carnil> attach will not work on v4.9.y as pointer arithmetic is
carnil> prohibited on those kernels.
Bugs:
upstream: released (5.11) [e88b2c6e5a4d9ce30d75391e4d950da74bb2bd90]
5.10-upstream-stable: released (5.10.16) [1d16cc210fabd0a7ebf52d3025f81c2bde054a90]
4.19-upstream-stable: released (4.19.206) [1d16cc210fabd0a7ebf52d3025f81c2bde054a90]
4.9-upstream-stable: needed
sid: released (5.10.19-1)
5.10-bullseye-security: N/A "Fixed before branching point"
4.19-buster-security: needed
4.9-stretch-security: needed
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