diff options
| -rw-r--r-- | arch/i386/kernel/process.c | 6 | ||||
| -rw-r--r-- | arch/x86_64/kernel/entry.S | 5 |
2 files changed, 10 insertions, 1 deletions
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c index dad02a960e0..b0a07801d9d 100644 --- a/arch/i386/kernel/process.c +++ b/arch/i386/kernel/process.c @@ -328,6 +328,7 @@ extern void kernel_thread_helper(void); int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) { struct pt_regs regs; + int err; memset(®s, 0, sizeof(regs)); @@ -342,7 +343,10 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2; /* Ok, create the new process.. */ - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); + err = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); + if (err == 0) /* terminate kernel stack */ + task_pt_regs(current)->eip = 0; + return err; } EXPORT_SYMBOL(kernel_thread); diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index b8285cf1a9c..ab9b2c4726f 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S @@ -978,6 +978,11 @@ ENTRY(kernel_thread) call do_fork movq %rax,RAX(%rsp) xorl %edi,%edi + test %rax,%rax + jnz 1f + /* terminate stack in child */ + movq %rdi,RIP(%rsp) +1: /* * It isn't worth to check for reschedule here, |