6.6-stable review patch. If anyone has any objections, please let me know.
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From: Dave Penkler dpenkler@gmail.com
commit 4e77d3ec7c7c0d9535ccf1138827cb9bb5480b9b upstream.
wait_event_interruptible_timeout returns a long The return value was being assigned to an int causing an integer overflow when the remaining jiffies > INT_MAX which resulted in random error returns.
Use a long return value, converting to the int ioctl return only on error.
Fixes: bb99794a4792 ("usb: usbtmc: Add ioctl for vendor specific read") Cc: stable@vger.kernel.org Signed-off-by: Dave Penkler dpenkler@gmail.com Link: https://lore.kernel.org/r/20250502070941.31819-4-dpenkler@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/class/usbtmc.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-)
--- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -833,6 +833,7 @@ static ssize_t usbtmc_generic_read(struc unsigned long expire; int bufcount = 1; int again = 0; + long wait_rv;
/* mutex already locked */
@@ -945,19 +946,24 @@ static ssize_t usbtmc_generic_read(struc if (!(flags & USBTMC_FLAG_ASYNC)) { dev_dbg(dev, "%s: before wait time %lu\n", __func__, expire); - retval = wait_event_interruptible_timeout( + wait_rv = wait_event_interruptible_timeout( file_data->wait_bulk_in, usbtmc_do_transfer(file_data), expire);
- dev_dbg(dev, "%s: wait returned %d\n", - __func__, retval); + dev_dbg(dev, "%s: wait returned %ld\n", + __func__, wait_rv);
- if (retval <= 0) { - if (retval == 0) - retval = -ETIMEDOUT; + if (wait_rv < 0) { + retval = wait_rv; goto error; } + + if (wait_rv == 0) { + retval = -ETIMEDOUT; + goto error; + } + }
urb = usb_get_from_anchor(&file_data->in_anchor);