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| author | Dan Williams <[email protected]> | 2019-06-13 22:56:24 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-06-14 03:34:56 +0000 |
| commit | e615a191216e3fb4e9c0d239007f2b0cd48f28bf (patch) | |
| tree | 0af64500c4f575848193609912b68744c408882f /lib/genalloc.c | |
| parent | mm/devm_memremap_pages: introduce devm_memunmap_pages (diff) | |
| download | kernel-e615a191216e3fb4e9c0d239007f2b0cd48f28bf.tar.gz kernel-e615a191216e3fb4e9c0d239007f2b0cd48f28bf.zip | |
PCI/P2PDMA: fix the gen_pool_add_virt() failure path
The pci_p2pdma_add_resource() implementation immediately frees the pgmap
if gen_pool_add_virt() fails. However, that means that when @dev
triggers a devres release devm_memremap_pages_release() will crash
trying to access the freed @pgmap.
Use the new devm_memunmap_pages() to manually free the mapping in the
error path.
Link: http://lkml.kernel.org/r/155727337603.292046.13101332703665246702.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <[email protected]>
Fixes: 52916982af48 ("PCI/P2PDMA: Support peer-to-peer memory")
Reviewed-by: Ira Weiny <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Logan Gunthorpe <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "Jérôme Glisse" <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/genalloc.c')
0 files changed, 0 insertions, 0 deletions