DEBIAN-CVE-2021-47375

In the Linux kernel, the following vulnerability has been resolved: blktrace: Fix uaf in blktrace access after removing by sysfs There is an use-after-free problem triggered by following process: P1sda P2sdb echo 0 /sys/block/sdb/trace/enable blktraceremovequeue synchronizercu blktracefree...

kernel: double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.c

A flaw was found in the allocatetracebuffer in kernel/trace/trace.c in the debug subsystem, when failure to allocate a dynamic percpu area, a resource cleanup is called. The pointer buf-buffer still holds the address and is not set to NULL, which can cause a use-after-free problem, leading to a...