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| author | Michael Schmitz <schmitzmic@gmail.com> | 2023-01-12 16:55:27 +1300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 16:26:42 +0100 |
| commit | 8a563ac3aadd0c92470b2f0c801a6b88c113bc92 (patch) | |
| tree | 828e6d048e0f445663dd367b1fd0eb9f14e13c51 /arch | |
| parent | 7cdb07e10c1258c08f31b24898930e4ece88d163 (diff) | |
| download | linux-stable-8a563ac3aadd0c92470b2f0c801a6b88c113bc92.tar.gz linux-stable-8a563ac3aadd0c92470b2f0c801a6b88c113bc92.tar.bz2 linux-stable-8a563ac3aadd0c92470b2f0c801a6b88c113bc92.zip | |
m68k: Check syscall_trace_enter() return code
[ Upstream commit 2ca8a1de4437f21562e57f9ac123914747a8e7a1 ]
Check return code of syscall_trace_enter(), and skip syscall
if -1. Return code will be left at what had been set by
ptrace or seccomp (in regs->d0).
No regression seen in testing with strace on ARAnyM.
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230112035529.13521-2-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68k/68000/entry.S | 2 | ||||
| -rw-r--r-- | arch/m68k/coldfire/entry.S | 2 | ||||
| -rw-r--r-- | arch/m68k/kernel/entry.S | 3 |
3 files changed, 7 insertions, 0 deletions
diff --git a/arch/m68k/68000/entry.S b/arch/m68k/68000/entry.S index 259b3661b614..94abf3d8afc5 100644 --- a/arch/m68k/68000/entry.S +++ b/arch/m68k/68000/entry.S @@ -47,6 +47,8 @@ do_trace: jbsr syscall_trace_enter RESTORE_SWITCH_STACK addql #4,%sp + addql #1,%d0 + jeq ret_from_exception movel %sp@(PT_OFF_ORIG_D0),%d1 movel #-ENOSYS,%d0 cmpl #NR_syscalls,%d1 diff --git a/arch/m68k/coldfire/entry.S b/arch/m68k/coldfire/entry.S index 52d312d5b4d4..fb3b06567745 100644 --- a/arch/m68k/coldfire/entry.S +++ b/arch/m68k/coldfire/entry.S @@ -92,6 +92,8 @@ ENTRY(system_call) jbsr syscall_trace_enter RESTORE_SWITCH_STACK addql #4,%sp + addql #1,%d0 + jeq ret_from_exception movel %d3,%a0 jbsr %a0@ movel %d0,%sp@(PT_OFF_D0) /* save the return value */ diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 97cd3ea5f10b..9a66657773be 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -160,9 +160,12 @@ do_trace_entry: jbsr syscall_trace RESTORE_SWITCH_STACK addql #4,%sp + addql #1,%d0 | optimization for cmpil #-1,%d0 + jeq ret_from_syscall movel %sp@(PT_OFF_ORIG_D0),%d0 cmpl #NR_syscalls,%d0 jcs syscall + jra ret_from_syscall badsys: movel #-ENOSYS,%sp@(PT_OFF_D0) jra ret_from_syscall |