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authorThomas Gleixner <tglx@linutronix.de>2017-12-23 19:45:11 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-12-23 20:18:42 +0100
commitf6c4fd506cb626e4346aa81688f255e593a7c5a0 (patch)
tree51356ab92d31c42e817b02ded05fe2dad0d17a81 /init
parent613e396bc0d4c7604fba23256644e78454c68cf6 (diff)
downloadlinux-f6c4fd506cb626e4346aa81688f255e593a7c5a0.tar.bz2
x86/cpu_entry_area: Prevent wraparound in setup_cpu_entry_area_ptes() on 32bit
The loop which populates the CPU entry area PMDs can wrap around on 32bit machines when the number of CPUs is small. It worked wonderful for NR_CPUS=64 for whatever reason and the moron who wrote that code did not bother to test it with !SMP. Check for the wraparound to fix it. Fixes: 92a0f81d8957 ("x86/cpu_entry_area: Move it out of the fixmap") Reported-by: kernel test robot <fengguang.wu@intel.com> Signed-off-by: Thomas "Feels stupid" Gleixner <tglx@linutronix.de> Tested-by: Borislav Petkov <bp@alien8.de>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions