kernel: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()

A vulnerability was found in the Linux kernel's SMC implementation in the smcvlanbytcpsk function. A potential NULL pointer dereference occurred when handling lower network devices, leading to system crashes and resulting in denial of service...

UBUNTU-CVE-2021-47559

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smcvlanbytcpsk Coverity reports a possible NULL dereferencing problem: in smcvlanbytcpsk: 6. returnednull: netdevlowergetnext returns NULL checked 29 out of 30 times. 7. varassigned:...

CVE-2021-47559

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smcvlanbytcpsk Coverity reports a possible NULL dereferencing problem: in smcvlanbytcpsk: 6. returnednull: netdevlowergetnext returns NULL checked 29 out of 30 times. 7. varassigned:...

CVE-2021-47559

CVE-2021-47559 (Linux kernel, net/smc): A NULL pointer dereference in smc_vlan_by_tcpsk() was reported during iteration over lower devices. The code path assigns ndev from netdev_lower_get_next and later dereferences ndev in is_vlan_dev(), risking a crash when the function returns NULL. The advis...