From: Amanieu d'Antras <amanieu@xxxxxxxxx> commit 167ee0b82429cb5df272808c7a21370b7c961ab2 upstream. This is required for clone3 which passes the TLS value through a struct rather than a register. Signed-off-by: Amanieu d'Antras <amanieu@xxxxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: <stable@xxxxxxxxxxxxxxx> # 5.3.x Link: https://lore.kernel.org/r/20200102172413.654385-4-amanieu@xxxxxxxxx Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm/Kconfig | 1 + arch/arm/kernel/process.c | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-) --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -73,6 +73,7 @@ config ARM select HAVE_ARM_SMCCC if CPU_V7 select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32 select HAVE_CONTEXT_TRACKING + select HAVE_COPY_THREAD_TLS select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS if MMU --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -224,8 +224,8 @@ void release_thread(struct task_struct * asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); int -copy_thread(unsigned long clone_flags, unsigned long stack_start, - unsigned long stk_sz, struct task_struct *p) +copy_thread_tls(unsigned long clone_flags, unsigned long stack_start, + unsigned long stk_sz, struct task_struct *p, unsigned long tls) { struct thread_info *thread = task_thread_info(p); struct pt_regs *childregs = task_pt_regs(p); @@ -259,7 +259,7 @@ copy_thread(unsigned long clone_flags, u clear_ptrace_hw_breakpoint(p); if (clone_flags & CLONE_SETTLS) - thread->tp_value[0] = childregs->ARM_r3; + thread->tp_value[0] = tls; thread->tp_value[1] = get_tpuser(); thread_notify(THREAD_NOTIFY_COPY, thread);
