Hello Steven Rostedt, Masami Hiramatsu, While fuzzing Linux 7.1-rc5 with syzkaller, as part of research at ASU's SEFCOM lab, we hit the crash below. Crash reports can be found here:
https://github.com/farhad-alemi/public_bug_reports/tree/main/116-tracing-uaf-t_start-instance-rmdir/ ================================================================== BUG: KASAN: slab-use-after-free in t_next kernel/trace/trace_events.c:1568 [inline] BUG: KASAN: slab-use-after-free in t_start+0xcc/0x210 kernel/trace/trace_events.c:1592 Read of size 8 at addr ffff888022f7a960 by task syz.4.116/12466 CPU: 0 UID: 0 PID: 12466 Comm: syz.4.116 Not tainted 7.1.0-rc5 #1 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x94/0xd0 lib/dump_stack.c:120 Our reproducer.c is available upon request. Happy to test a patch if that would help. Regards,
