diff options
| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-04-07 20:43:39 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-04-09 08:31:24 (GMT) |
| commit | 0f90fb979d7b53d80a6d5cb6e127b4b4b249907e (patch) | |
| tree | 94a4a3f1fc3634487ad80a503940bfe4cf28a51a /arch/x86/kernel | |
| parent | 05f1752d195c145d02ae40881d0985c2cfbee473 (diff) | |
| download | linux-0f90fb979d7b53d80a6d5cb6e127b4b4b249907e.tar.xz | |
x86/asm/entry: Zero EXTRA_REGS for stub32_execve() too
The change which affected how execve clears EXTRA_REGS missed
32-bit execve syscalls.
Fix this by using 64-bit execve stub epilogue for them too.
Run-tested.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1428439424-7258-3-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index f7d9ba6..5380b3a 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -538,6 +538,21 @@ ENTRY(stub_x32_execveat) END(stub_x32_execveat) #endif +#ifdef CONFIG_IA32_EMULATION +ENTRY(stub32_execve) + CFI_STARTPROC + call compat_sys_execve + jmp return_from_execve + CFI_ENDPROC +END(stub32_execve) +ENTRY(stub32_execveat) + CFI_STARTPROC + call compat_sys_execveat + jmp return_from_execve + CFI_ENDPROC +END(stub32_execveat) +#endif + /* * sigreturn is special because it needs to restore all registers on return. * This cannot be done with SYSRET, so use the IRET return path instead. |