This is a note to let you know that I've just added the patch titled
PCI: endpoint: Fix find_first_zero_bit() usage
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: pci-endpoint-fix-find_first_zero_bit-usage.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Thu Mar 22 14:03:40 CET 2018
From: Niklas Cassel niklas.cassel@axis.com Date: Thu, 14 Dec 2017 14:01:46 +0100 Subject: PCI: endpoint: Fix find_first_zero_bit() usage
From: Niklas Cassel niklas.cassel@axis.com
[ Upstream commit 35ad61921f495ee14915d185de79478c1737b4da ]
find_first_zero_bit()'s parameter 'size' is defined in bits, not in bytes.
Calling find_first_zero_bit() with the wrong size unit will lead to insidious bugs.
Fix this by calling find_first_zero_bit() with size BITS_PER_LONG, rather than sizeof() and add missing find_first_zero_bit() return handling.
Fixes: d74679911610 ("PCI: endpoint: Introduce configfs entry for configuring EP functions") Signed-off-by: Niklas Cassel niklas.cassel@axis.com Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Acked-by: Kishon Vijay Abraham I kishon@ti.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/endpoint/pci-ep-cfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/pci/endpoint/pci-ep-cfs.c +++ b/drivers/pci/endpoint/pci-ep-cfs.c @@ -109,7 +109,10 @@ static int pci_epc_epf_link(struct confi goto err_add_epf;
func_no = find_first_zero_bit(&epc_group->function_num_map, - sizeof(epc_group->function_num_map)); + BITS_PER_LONG); + if (func_no >= BITS_PER_LONG) + return -EINVAL; + set_bit(func_no, &epc_group->function_num_map); epf->func_no = func_no;
Patches currently in stable-queue which might be from niklas.cassel@axis.com are
queue-4.15/pci-endpoint-fix-find_first_zero_bit-usage.patch