[PATCH v5 0/2] Fix issues with vmalloc flush flag

From: Rick Edgecombe
Date: Mon May 27 2019 - 17:14:45 EST


These two patches address issues with the recently added
VM_FLUSH_RESET_PERMS vmalloc flag.

Patch 1 addresses an issue that could cause a crash after other
architectures besides x86 rely on this path.

Patch 2 addresses an issue where in a rare case strange arguments
could be provided to flush_tlb_kernel_range().

v4->v5:
- Update commit messages with info that the first issue will actually
not cause problems today
- Avoid re-use of variable (PeterZ)

v3->v4:
- Drop patch that switched vm_unmap_alias() calls to regular flush (Andy)
- Add patch to address correctness previously fixed in dropped patch

v2->v3:
- Split into two patches (Andy)

v1->v2:
- Update commit message with more detail
- Fix flush end range on !CONFIG_ARCH_HAS_SET_DIRECT_MAP case


Rick Edgecombe (2):
vmalloc: Fix calculation of direct map addr range
vmalloc: Avoid rare case of flushing tlb with weird arguments

mm/vmalloc.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)

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2.20.1