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| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-12-11 20:25:37 +0000 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-12-18 19:04:45 -0800 |
| commit | a2e740e216f5bf49ccb83b6d490c72a340558a43 (patch) | |
| tree | c477631f64e3d4169d5127f7cb1388a8d15992f5 /scripts/lib/kdoc/kdoc_files.py | |
| parent | mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy() (diff) | |
| download | linux-rng-a2e740e216f5bf49ccb83b6d490c72a340558a43.tar.xz linux-rng-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/20241211202538.168311-1-willy@infradead.org
Fixes: b944afc9d64d ("mm: add a VM_MAP_PUT_PAGES flag for vmap")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Balbir Singh <balbirs@nvidia.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_files.py')
0 files changed, 0 insertions, 0 deletions