diff options
Diffstat (limited to 'arch/um/os-Linux/helper.c')
| -rw-r--r-- | arch/um/os-Linux/helper.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c index 8a78bf03b46..d13299cfa31 100644 --- a/arch/um/os-Linux/helper.c +++ b/arch/um/os-Linux/helper.c @@ -50,7 +50,8 @@ static int helper_child(void *arg) } /* Returns either the pid of the child process we run or -E* on failure. - * XXX The alloc_stack here breaks if this is called in the tracing thread */ + * XXX The alloc_stack here breaks if this is called in the tracing thread, so + * we need to receive a preallocated stack (a local buffer is ok). */ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, unsigned long *stack_out) { @@ -113,10 +114,8 @@ out_close: close(fds[1]); close(fds[0]); out_free: - if (stack_out == NULL) + if ((stack_out == NULL) || (*stack_out == 0)) free_stack(stack, 0); - else - *stack_out = stack; return ret; } |