sh: Fix validation of system call number

[ Upstream commit 04a8a3d0a73f51c7c2da84f494db7ec1df230e69 ]

The slow path for traced system call entries accessed a wrong memory
location to get the number of the maximum allowed system call number.
Renumber the numbered "local" label for the correct location to avoid
collisions with actual local labels.

Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Fixes: f3a8308864f920d2 ("sh: Add a few missing irqflags tracing markers.")
Signed-off-by: Rich Felker <dalias@libc.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 28cc61216b649773045d2eb16bdd997602ac9087..ed5b758c650d78dbf95ac3b8fae62a32aced2b10 100644 (file)
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -203,7 +203,7 @@ syscall_trace_entry:
        mov.l   @(OFF_R7,r15), r7   ! arg3
        mov.l   @(OFF_R3,r15), r3   ! syscall_nr
        !
-       mov.l   2f, r10                 ! Number of syscalls
+       mov.l   6f, r10                 ! Number of syscalls
        cmp/hs  r10, r3
        bf      syscall_call
        mov     #-ENOSYS, r0
@@ -357,7 +357,7 @@ ENTRY(system_call)
        tst     r9, r8
        bf      syscall_trace_entry
        !
-       mov.l   2f, r8                  ! Number of syscalls
+       mov.l   6f, r8                  ! Number of syscalls
        cmp/hs  r8, r3
        bt      syscall_badsys
        !
@@ -396,7 +396,7 @@ syscall_exit:
 #if !defined(CONFIG_CPU_SH2)
 1:     .long   TRA
 #endif
-2:     .long   NR_syscalls
+6:     .long   NR_syscalls
 3:     .long   sys_call_table
 7:     .long   do_syscall_trace_enter
 8:     .long   do_syscall_trace_leave