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| author | Matthew Wilcox (Oracle) <[email protected]> | 2024-12-11 20:25:37 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-12-19 03:04:45 +0000 |
| commit | a2e740e216f5bf49ccb83b6d490c72a340558a43 (patch) | |
| tree | c477631f64e3d4169d5127f7cb1388a8d15992f5 /lib/alloc_tag.c | |
| parent | mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split... (diff) | |
| download | kernel-a2e740e216f5bf49ccb83b6d490c72a340558a43.tar.gz kernel-a2e740e216f5bf49ccb83b6d490c72a340558a43.zip | |
vmalloc: fix accounting with i915
If the caller of vmap() specifies VM_MAP_PUT_PAGES (currently only the
i915 driver), we will decrement nr_vmalloc_pages and MEMCG_VMALLOC in
vfree(). These counters are incremented by vmalloc() but not by vmap() so
this will cause an underflow. Check the VM_MAP_PUT_PAGES flag before
decrementing either counter.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: b944afc9d64d ("mm: add a VM_MAP_PUT_PAGES flag for vmap")
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Reviewed-by: Shakeel Butt <[email protected]>
Reviewed-by: Balbir Singh <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: "Uladzislau Rezki (Sony)" <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'lib/alloc_tag.c')
0 files changed, 0 insertions, 0 deletions