mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-07-25 16:19:48 +02:00
Krzysztof WilczyńskiandGreg Kroah-Hartman
9ff90fdf84
[ Upstream commit802a3b3f47] Currently, __pci_mmap_fits() computes the BAR size using "pci_resource_len() - 1", which wraps to a large value when the BAR length is zero, causing the bounds check to incorrectly succeed. Add an early return for empty resources. Fixes:10a0ef39fb("PCI/alpha: pci sysfs resources") Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Magnus Lindholm <linmag7@gmail.com> Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Acked-by: Magnus Lindholm <linmag7@gmail.com> Link: https://patch.msgid.link/20260508043543.217179-15-kwilczynski@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>