thunderbolt: Fix possible NULL pointer dereference in tb_acpi_add_link()
commit 4d395c5e upstream. When we walk up the device hierarchy in tb_acpi_add_link() make sure we break the loop if the device has no parent. Otherwise we may crash the kernel by dereferencing a NULL pointer. Fixes: b2be2b05 ("thunderbolt: Create device links from ACPI description") Cc: stable@vger.kernel.org Signed-off-by:Mario Limonciello <mario.limonciello@dell.com> Acked-by:
Yehezkel Bernat <YehezkelShB@gmail.com> Signed-off-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by:
Liwei Song <liwei.song@windriver.com>
parent
0011d8a9
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