4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Dmitry V. Levin <[email protected]> commit c50cbd85cd7027d32ac5945bb60217936b4f7eaf upstream. When checking for TIF_32BIT_REGS flag, mips_get_syscall_arg() should use the task specified as its argument instead of the current task. This potentially affects all syscall_get_arguments() users who specify tasks different from the current. Fixes: c0ff3c53d4f99 ("MIPS: Enable HAVE_ARCH_TRACEHOOK.") Signed-off-by: Dmitry V. Levin <[email protected]> Signed-off-by: Paul Burton <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/21185/ Cc: Elvira Khabirova <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: James Hogan <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] # v3.13+ Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/mips/include/asm/syscall.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/mips/include/asm/syscall.h +++ b/arch/mips/include/asm/syscall.h @@ -51,7 +51,7 @@ static inline unsigned long mips_get_sys #ifdef CONFIG_64BIT case 4: case 5: case 6: case 7: #ifdef CONFIG_MIPS32_O32 - if (test_thread_flag(TIF_32BIT_REGS)) + if (test_tsk_thread_flag(task, TIF_32BIT_REGS)) return get_user(*arg, (int *)usp + n); else #endif
