https://github.com/torvalds/linux
Verify the stack frame pointer on kretprobe trampoline handler, If the stack frame pointer does not match, it skips the wrong entry and tries to find correct one. This can happen if user puts the kretprobe on the function which can be used in the path of ftrace user-function call. Such functions should not be probed, so this adds a warning message that reports which function should be blacklisted. Tested-by: Andrea Righi <righi.andrea@gmail.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/155094059185.6137.15527904013362842072.stgit@devbox Signed-off-by: Ingo Molnar <mingo@kernel.org>
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x86/kprobes: Verify stack frame on kretprobe
File | Mode | Size |
---|---|---|
.gitignore | -rw-r--r-- | 44 bytes |
Kconfig | -rw-r--r-- | 3.4 KB |
Makefile | -rw-r--r-- | 4.1 KB |
blacklist.c | -rw-r--r-- | 4.0 KB |
blacklist.h | -rw-r--r-- | 84 bytes |
blacklist_hashes.c | -rw-r--r-- | 166 bytes |
blacklist_nohashes.c | -rw-r--r-- | 122 bytes |
system_certificates.S | -rw-r--r-- | 828 bytes |
system_keyring.c | -rw-r--r-- | 8.0 KB |
Computing file changes ...