From: Eric W. Biederman ebiederm@xmission.com
commit 086ec444f86660e103de8945d0dcae9b67132ac9 upstream.
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 Cc: Thomas Backlund tmb@iki.fi Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/sparc/kernel/signal_32.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/sparc/kernel/signal_32.c +++ b/arch/sparc/kernel/signal_32.c @@ -244,7 +244,7 @@ static int setup_frame(struct ksignal *k 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 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; }