Commit 086ec444 authored Oct 20, 2021 by Eric W. Biederman

signal/sparc32: In setup_rt_frame and setup_fram use force_fatal_sig

Modify the 32bit version of setup_rt_frame and setup_frame to act
similar to the 64bit version of setup_rt_frame and fail with a signal
instead of calling do_exit.

Replacing do_exit(SIGILL) with force_fatal_signal(SIGILL) ensures that
the process will be terminated cleanly when the stack frame is
invalid, instead of just killing off a single thread and leaving the
process is a weird state.

Cc: David Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Link: https://lkml.kernel.org/r/20211020174406.17889-16-ebiederm@xmission.com


Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

parent c317d306

arch/sparc/kernel/signal_32.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -244,7 +244,7 @@ static int setup_frame(struct ksignal ksig, struct pt_regs regs,
		get_sigframe(ksig, regs, sigframe_size);

		if (invalid_frame_pointer(sf, sigframe_size)) {
		do_exit(SIGILL);
		force_fatal_sig(SIGILL);
		return -EINVAL;
		}

		@@ -336,7 +336,7 @@ static int setup_rt_frame(struct ksignal ksig, struct pt_regs regs,
		sf = (struct rt_signal_frame __user *)
		get_sigframe(ksig, regs, sigframe_size);
		if (invalid_frame_pointer(sf, sigframe_size)) {
		do_exit(SIGILL);
		force_fatal_sig(SIGILL);
		return -EINVAL;
		}