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Date: Tue, 5 Apr 2022 09:32:57 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Antonino Daplas <adaplas@...il.com>, linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org, Tim Gardner <tim.gardner@...onical.com>, Helge Deller <deller@....de>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.10 483/599] video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow From: Tim Gardner <tim.gardner@...onical.com> [ Upstream commit 37a1a2e6eeeb101285cd34e12e48a881524701aa ] Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer. Cc: Antonino Daplas <adaplas@...il.com> Cc: linux-fbdev@...r.kernel.org Cc: dri-devel@...ts.freedesktop.org Cc: linux-kernel@...r.kernel.org Signed-off-by: Tim Gardner <tim.gardner@...onical.com> Signed-off-by: Helge Deller <deller@....de> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/video/fbdev/nvidia/nv_i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/nvidia/nv_i2c.c b/drivers/video/fbdev/nvidia/nv_i2c.c index d7994a173245..0b48965a6420 100644 --- a/drivers/video/fbdev/nvidia/nv_i2c.c +++ b/drivers/video/fbdev/nvidia/nv_i2c.c @@ -86,7 +86,7 @@ static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name, { int rc; - strcpy(chan->adapter.name, name); + strscpy(chan->adapter.name, name, sizeof(chan->adapter.name)); chan->adapter.owner = THIS_MODULE; chan->adapter.class = i2c_class; chan->adapter.algo_data = &chan->algo; -- 2.34.1
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