diff options
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 0acc8ed1076b..771e0ea90499 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -96,6 +96,7 @@ #include <linux/kasan.h> #include <linux/scs.h> #include <linux/io_uring.h> +#include <linux/bpf.h> #include <asm/pgalloc.h> #include <linux/uaccess.h> @@ -379,14 +380,17 @@ static void account_kernel_stack(struct task_struct *tsk, int account) void *stack = task_stack_page(tsk); struct vm_struct *vm = task_stack_vm_area(tsk); + if (vm) { + int i; - /* All stack pages are in the same node. */ - if (vm) - mod_lruvec_page_state(vm->pages[0], NR_KERNEL_STACK_KB, - account * (THREAD_SIZE / 1024)); - else + for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++) + mod_lruvec_page_state(vm->pages[i], NR_KERNEL_STACK_KB, + account * (PAGE_SIZE / 1024)); + } else { + /* All stack pages are in the same node. */ mod_lruvec_kmem_state(stack, NR_KERNEL_STACK_KB, account * (THREAD_SIZE / 1024)); + } } static int memcg_charge_kernel_stack(struct task_struct *tsk) @@ -734,6 +738,7 @@ void __put_task_struct(struct task_struct *tsk) cgroup_free(tsk); task_numa_free(tsk, true); security_task_free(tsk); + bpf_task_storage_free(tsk); exit_creds(tsk); delayacct_tsk_free(tsk); put_signal_struct(tsk->signal); @@ -927,6 +932,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) tsk->splice_pipe = NULL; tsk->task_frag.page = NULL; tsk->wake_q.next = NULL; + tsk->pf_io_worker = NULL; account_kernel_stack(tsk, 1); @@ -1941,15 +1947,21 @@ static __latent_entropy struct task_struct *copy_process( recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); retval = -ERESTARTNOINTR; - if (signal_pending(current)) + if (task_sigpending(current)) goto fork_out; retval = -ENOMEM; p = dup_task_struct(current, node); if (!p) goto fork_out; - if (args->io_thread) + if (args->io_thread) { + /* + * Mark us an IO worker, and block any signal that isn't + * fatal or STOP + */ p->flags |= PF_IO_WORKER; + siginitsetinv(&p->blocked, sigmask(SIGKILL)|sigmask(SIGSTOP)); + } /* * This _must_ happen before we call free_task(), i.e. before we jump @@ -2003,6 +2015,7 @@ static __latent_entropy struct task_struct *copy_process( spin_lock_init(&p->alloc_lock); init_sigpending(&p->pending); + p->sigqueue_cache = NULL; p->utime = p->stime = p->gtime = 0; #ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME @@ -2072,13 +2085,16 @@ static __latent_entropy struct task_struct *copy_process( p->sequential_io = 0; p->sequential_io_avg = 0; #endif +#ifdef CONFIG_BPF_SYSCALL + RCU_INIT_POINTER(p->bpf_storage, NULL); +#endif /* Perform scheduler related setup. Assign this task to a CPU. */ retval = sched_fork(clone_flags, p); if (retval) goto bad_fork_cleanup_policy; - retval = perf_event_init_task(p); + retval = perf_event_init_task(p, clone_flags); if (retval) goto bad_fork_cleanup_policy; retval = audit_alloc(p); @@ -2438,15 +2454,8 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node) .stack_size = (unsigned long)arg, .io_thread = 1, }; - struct task_struct *tsk; - tsk = copy_process(NULL, 0, node, &args); - if (!IS_ERR(tsk)) { - sigfillset(&tsk->blocked); - sigdelsetmask(&tsk->blocked, sigmask(SIGKILL)); - tsk->flags |= PF_NOFREEZE; - } - return tsk; + return copy_process(NULL, 0, node, &args); } /* |