Description: bpf: fix 32-bit ALU op verification
References:
 http://www.openwall.com/lists/oss-security/2017/12/21/2
Notes:
 carnil> Introduced with f1174f77b50c94eecaa658fdc56fa69b421de4b8 in v4.14-rc1.
Bugs:
upstream: released (4.15-rc5) [468f6eafa6c44cb2c5d8aad35e12f06c240a812a]
4.9-upstream-stable: N/A "Vulnerable code introduced in 4.14-rc1"
3.16-upstream-stable: N/A "Vulnerable code introduced in 4.14-rc1"
3.2-upstream-stable: N/A "Vulnerable code introduced in 4.14-rc1"
sid: released (4.14.7-1) [bugfix/all/bpf-fix-32-bit-alu-op-verification.patch]
4.9-stretch-security: N/A "Vulnerable code introduced later"
3.16-jessie-security: N/A "Vulnerable code introduced later"
3.2-wheezy-security: N/A "Vulnerable code introduced later"