From: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
To: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
Subject: [PATCH 1/4] sh: Fix validation of system call number
Date: Wed, 22 Jul 2020 23:13:19 +0000 [thread overview]
Message-ID: <20200722231322.419642-1-kernel@mkarcher.dialup.fu-berlin.de> (raw)
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>
---
arch/sh/kernel/entry-common.S | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 956a7a03b0c8..9bac5bbb67f3 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -199,7 +199,7 @@ 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
@@ -353,7 +353,7 @@ 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
!
@@ -392,7 +392,7 @@ 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
--
2.28.0.rc1
next reply other threads:[~2020-07-22 23:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-22 23:13 Michael Karcher [this message]
2020-07-22 23:13 ` [PATCH 2/4] sh: Rearrange blocks in entry-common.S Michael Karcher
2020-07-22 23:20 ` John Paul Adrian Glaubitz
2020-07-22 23:13 ` [PATCH 3/4] sh: Add SECCOMP_FILTER Michael Karcher
2020-07-22 23:20 ` John Paul Adrian Glaubitz
2020-08-28 15:50 ` Rich Felker
2020-08-28 16:21 ` John Paul Adrian Glaubitz
2020-08-28 16:30 ` Rich Felker
2020-08-28 16:38 ` John Paul Adrian Glaubitz
2020-08-28 17:03 ` Rich Felker
2020-08-29 0:49 ` Rich Felker
2020-08-29 11:09 ` John Paul Adrian Glaubitz
2020-09-03 3:56 ` Rich Felker
2020-09-03 5:46 ` Rich Felker
2020-09-03 6:04 ` John Paul Adrian Glaubitz
2020-09-03 6:17 ` Rich Felker
2020-09-03 6:03 ` John Paul Adrian Glaubitz
2020-07-22 23:13 ` [PATCH 4/4] sh: bring syscall_set_return_value in line with other architectures Michael Karcher
2020-07-22 23:20 ` John Paul Adrian Glaubitz
2020-07-22 23:19 ` [PATCH 1/4] sh: Fix validation of system call number John Paul Adrian Glaubitz
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