Brian Gerst 1daeaa3151 x86/asm/entry: Fix execve() and sigreturn() syscalls to always return via IRET ... Both the execve() and sigreturn() family of syscalls have the ability to change registers in ways that may not be compatabile with the syscall path they were called from. In particular, SYSRET and SYSEXIT can't handle non-default %cs and %ss, and some bits in eflags. These syscalls have stubs that are hardcoded to jump to the IRET path, and not return to the original syscall path. The following commit: 76f5df43ca ("Always allocate a complete "struct pt_regs" on the kernel stack") recently changed this for some 32-bit compat syscalls, but introduced a bug where execve from a 32-bit program to a 64-bit program would fail because it still returned via SYSRETL. This caused Wine to fail when built for both 32-bit and 64-bit. This patch sets TIF_NOTIFY_RESUME for execve() and sigreturn() so that the IRET path is always taken on exit to userspace. Signed-off-by: Brian Gerst <brgerst@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1426978461-32089-1-git-send-email-brgerst@gmail.com [ Improved the changelog and comments. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>		2015-03-23 08:52:46 +01:00
..
audit.c	x86: hook up execveat system call	2014-12-13 12:42:51 -08:00
ia32_aout.c	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
ia32_signal.c	x86/asm/entry: Fix execve() and sigreturn() syscalls to always return via IRET	2015-03-23 08:52:46 +01:00
ia32entry.S	x86/asm/entry: Rename 'init_tss' to 'cpu_tss'	2015-03-06 08:32:58 +01:00
Makefile	x86/compat: Merge native and compat 32-bit syscall tables	2015-03-04 06:16:21 +01:00
sys_ia32.c	x86/compat: Remove sys32_vm86_warning	2015-03-04 06:16:21 +01:00