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| author | Joerg Roedel <[email protected]> | 2018-04-17 13:27:16 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-04-17 13:43:01 +0000 |
| commit | d6ef1f194b7569af8b8397876dc9ab07649d63cb (patch) | |
| tree | 9d7bd7b181f1d7f32abb559812163b8eba076d8b /drivers/fpga/fpga-region.c | |
| parent | x86,sched: Allow topologies where NUMA nodes share an LLC (diff) | |
| download | kernel-d6ef1f194b7569af8b8397876dc9ab07649d63cb.tar.gz kernel-d6ef1f194b7569af8b8397876dc9ab07649d63cb.zip | |
x86/mm: Prevent kernel Oops in PTDUMP code with HIGHPTE=y
The walk_pte_level() function just uses __va to get the virtual address of
the PTE page, but that breaks when the PTE page is not in the direct
mapping with HIGHPTE=y.
The result is an unhandled kernel paging request at some random address
when accessing the current_kernel or current_user file.
Use the correct API to access PTE pages.
Fixes: fe770bf0310d ('x86: clean up the page table dumper and add 32-bit support')
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-region.c')
0 files changed, 0 insertions, 0 deletions