4.9-stable review patch. If anyone has any objections, please let me know.
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From: Anton Vasilyev vasilyev@ispras.ru
[ Upstream commit 744820869166c8c78be891240cf5f66e8a333694 ]
Debugfs file reset_stats is created with S_IRUSR permissions, but ocrdma_dbgfs_ops_read() doesn't support OCRDMA_RESET_STATS, whereas ocrdma_dbgfs_ops_write() supports only OCRDMA_RESET_STATS.
The patch fixes misstype with permissions.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev vasilyev@ispras.ru Acked-by: Selvin Xavier selvin.xavier@broadcom.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/infiniband/hw/ocrdma/ocrdma_stats.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/hw/ocrdma/ocrdma_stats.c +++ b/drivers/infiniband/hw/ocrdma/ocrdma_stats.c @@ -836,7 +836,7 @@ void ocrdma_add_port_stats(struct ocrdma
dev->reset_stats.type = OCRDMA_RESET_STATS; dev->reset_stats.dev = dev; - if (!debugfs_create_file("reset_stats", S_IRUSR, dev->dir, + if (!debugfs_create_file("reset_stats", 0200, dev->dir, &dev->reset_stats, &ocrdma_dbg_ops)) goto err;