summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorPeter Zijlstra <peterz@infradead.org>2022-07-08 09:18:06 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2022-07-21 10:50:13 -0700
commitb67fbebd4cf980aecbcc750e1462128bffe8ae15 (patch)
tree96e359e543dd17dae340b5d87903027228c3ca92 /drivers
parent18ba064e42df3661e196ab58a23931fc732a420b (diff)
mmu_gather: Force tlb-flush VM_PFNMAP vmas
Jann reported a race between munmap() and unmap_mapping_range(), where unmap_mapping_range() will no-op once unmap_vmas() has unlinked the VMA; however munmap() will not yet have invalidated the TLBs. Therefore unmap_mapping_range() will complete while there are still (stale) TLB entries for the specified range. Mitigate this by force flushing TLBs for VM_PFNMAP ranges. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions