An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails.

...

Unspecified vulnerability in Linux kernel (CNVD-2020-28266)

Linux kernel is the kernel used by Linux, the open source operating system released by the Linux Foundation in the United States. A security vulnerability exists in the 'btreegccoalesce' function in the drivers/md/bcache/btree.c file in Linux kernel 5.6.11 and earlier versions. An attacker can...