This is a note to let you know that I've just added the patch titled
pci_iounmap(): Fix MMIO mapping leak
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci_iounmap-fix-mmio-mapping-leak.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 010435c1902be5b97a08b19248e7bde658759ce6
Author: Philipp Stanner <pstanner@xxxxxxxxxx>
Date: Wed Jan 31 10:00:20 2024 +0100
pci_iounmap(): Fix MMIO mapping leak
[ Upstream commit 7626913652cc786c238e2dd7d8740b17d41b2637 ]
The #ifdef ARCH_HAS_GENERIC_IOPORT_MAP accidentally also guards iounmap(),
which means MMIO mappings are leaked.
Move the guard so we call iounmap() for MMIO mappings.
Fixes: 316e8d79a095 ("pci_iounmap'2: Electric Boogaloo: try to make sense of it all")
Link: https://lore.kernel.org/r/20240131090023.12331-2-pstanner@xxxxxxxxxx
Reported-by: Danilo Krummrich <dakr@xxxxxxxxxx>
Suggested-by: Arnd Bergmann <arnd@xxxxxxxxxx>
Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.15+
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/lib/pci_iomap.c b/lib/pci_iomap.c
index ce39ce9f3526e..2829ddb0e316b 100644
--- a/lib/pci_iomap.c
+++ b/lib/pci_iomap.c
@@ -170,8 +170,8 @@ void pci_iounmap(struct pci_dev *dev, void __iomem *p)
if (addr >= start && addr < start + IO_SPACE_LIMIT)
return;
- iounmap(p);
#endif
+ iounmap(p);
}
EXPORT_SYMBOL(pci_iounmap);
