Hi stable tree maintainers,
Please revert the backports of
44c76825d6ee ("x86: Increase brk randomness entropy for 64-bit systems")
namely:
5.4: 03475167fda50b8511ef620a27409b08365882e1
5.10: 25d31baf922c1ee987efd6fcc9c7d4ab539c66b4
5.15: 06cb3463aa58906cfff72877eb7f50cb26e9ca93
6.1: b0cde867b80a5e81fcbc0383e138f5845f2005ee
6.6: 1a45994fb218d93dec48a3a86f68283db61e0936
There seems to be a bad interaction between this change and older
PIE-built qemu-user-static (for aarch64) binaries[1]. Investigation
continues to see if this will need to be reverted from 6.6, 6.11,
and mainline. But for now, it's clearly a problem for older kernels with
older qemu.
Thanks!
-Kees
[1] https://lore.kernel.org/all/202411201000.F3313C02@keescook/
--
Kees Cook
