CVE-2021-47564

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: marvell: prestera: fix double free issue on err path<br /> <br /> fix error path handling in prestera_bridge_port_join() that<br /> cases prestera driver to crash (see below).<br /> <br /> Trace:<br /> Internal error: Oops: 96000044 [#1] SMP<br /> Modules linked in: prestera_pci prestera uio_pdrv_genirq<br /> CPU: 1 PID: 881 Comm: ip Not tainted 5.15.0 #1<br /> pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)<br /> pc : prestera_bridge_destroy+0x2c/0xb0 [prestera]<br /> lr : prestera_bridge_port_join+0x2cc/0x350 [prestera]<br /> sp : ffff800011a1b0f0<br /> ...<br /> x2 : ffff000109ca6c80 x1 : dead000000000100 x0 : dead000000000122<br /> Call trace:<br /> prestera_bridge_destroy+0x2c/0xb0 [prestera]<br /> prestera_bridge_port_join+0x2cc/0x350 [prestera]<br /> prestera_netdev_port_event.constprop.0+0x3c4/0x450 [prestera]<br /> prestera_netdev_event_handler+0xf4/0x110 [prestera]<br /> raw_notifier_call_chain+0x54/0x80<br /> call_netdevice_notifiers_info+0x54/0xa0<br /> __netdev_upper_dev_link+0x19c/0x380