Patch "PCI: endpoint: Fix find_first_zero_bit() usage" has been added to the 4.14-stable tree

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 4.14-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-endpoint-fix-find_first_zero_bit-usage.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Niklas Cassel <[email protected]>
Date: Thu, 14 Dec 2017 14:01:46 +0100
Subject: PCI: endpoint: Fix find_first_zero_bit() usage

From: Niklas Cassel <[email protected]>

[ 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.

---
 drivers/pci/endpoint/pci-ep-cfs.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -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 [email protected] are

queue-4.14/pci-endpoint-fix-find_first_zero_bit-usage.patch