CVE-2024-49868 btrfs: fix a NULL pointer dereference when failed to start a new trasacntion

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix a NULL pointer dereference when failed to start a new trasacntion BUG Syzbot reported a NULL pointer dereference with the following crash: FAULTINJECTION: forcing a failure. starttransaction+0x830/0x1670...

PT-2024-33713

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.6.58 Description: A NULL pointer dereference vulnerability has been resolved in the Linux kernel. The issue occurs when a new transaction fails to start, leading to a NULL pointer dereference in the btrfs upda...