Merge tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture updates from Helge Deller:

 - Fix a kernel crash when a signal is delivered to bad userspace stack

 - Fix fall-through warnings in math-emu code

 - Increase size of gcc stack frame check

 - Switch coding from 'pci_' to 'dma_' API

 - Make struct parisc_driver::remove() return void

 - Some parisc related Makefile changes

 - Minor cleanups, e.g. change to octal permissions, fix macro
   collisions, fix PMD_ORDER collision, replace spaces with tabs

* tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: math-emu: Fix fall-through warnings
  parisc: fix crash with signals and alloca
  parisc: Fix compile failure when building 64-bit kernel natively
  parisc: ccio-dma.c: Added tab instead of spaces
  parisc/parport_gsc: switch from 'pci_' to 'dma_' API
  parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild
  parisc: switch from 'pci_' to 'dma_' API
  parisc: Make struct parisc_driver::remove() return void
  parisc: remove unused arch/parisc/boot/install.sh and its phony target
  parisc: Rename PMD_ORDER to PMD_TABLE_ORDER
  parisc: math-emu: Avoid "fmt" macro collision
  parisc: Increase size of gcc stack frame check
  parisc: Replace symbolic permissions with octal permissions

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index fb1e94a3982b..db1a47cf424d 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -237,6 +237,12 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
 #endif
 	
 	usp = (regs->gr[30] & ~(0x01UL));
+#ifdef CONFIG_64BIT
+	if (is_compat_task()) {
+		/* The gcc alloca implementation leaves garbage in the upper 32 bits of sp */
+		usp = (compat_uint_t)usp;
+	}
+#endif
 	/*FIXME: frame_size parameter is unused, remove it. */
 	frame = get_sigframe(&ksig->ka, usp, sizeof(*frame));