Description
In the Linux kernel, the following vulnerability has been resolved: gpio: cdev: fix kernel stack leak to user-space in error path If we fail to acquire the GPIO chip guard in gpio_desc_to_lineinfo(), we return immediately before zeroing the info struct we'll end up passing to the user-space later in lineinfo_get_v1(). This may leak the kernel stack contents. Make gpio_desc_to_lineinfo() return int so that the -ENODEV returned on failure to acquire the guard can be propagated to the callers. While not strictly necessary: move the memset() before trying to acquire the SRCU read lock too for good measure.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 to < 8460ee5216ab9a38263b01dca4b0a27e083f70f3affectedd83cee3d2bb131c7fca7e19f1e33dc7530fd7083 to < cf3d043582e106a0e57002bec8a6de8929ba3e1caffectedd83cee3d2bb131c7fca7e19f1e33dc7530fd7083 to < 60a466f231905cd96ae6f0f3c44a710c97873dacaffectedd83cee3d2bb131c7fca7e19f1e33dc7530fd7083 to < 1feb5d39b05afd902ed9fc902ec5b15be03a4bdbaffected
Linux Linux
Default version status: affected
6.9affected0 to < 6.9unaffected6.12.112 to ≤ 6.12.*unaffected6.18.55 to ≤ 6.18.*unaffected7.2.9 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected