diff options
Diffstat (limited to 'include/linux/tracehook.h')
| -rw-r--r-- | include/linux/tracehook.h | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index a71a2927a6a..6f8ab7da27c 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -49,17 +49,18 @@ #include <linux/sched.h> #include <linux/ptrace.h> #include <linux/security.h> +#include <linux/task_work.h> struct linux_binprm; /* * ptrace report for syscall entry and exit looks identical. */ -static inline void ptrace_report_syscall(struct pt_regs *regs) +static inline int ptrace_report_syscall(struct pt_regs *regs) { int ptrace = current->ptrace; if (!(ptrace & PT_PTRACED)) - return; + return 0; ptrace_notify(SIGTRAP | ((ptrace & PT_TRACESYSGOOD) ? 0x80 : 0)); @@ -72,6 +73,8 @@ static inline void ptrace_report_syscall(struct pt_regs *regs) send_sig(current->exit_code, current, 1); current->exit_code = 0; } + + return fatal_signal_pending(current); } /** @@ -96,8 +99,7 @@ static inline void ptrace_report_syscall(struct pt_regs *regs) static inline __must_check int tracehook_report_syscall_entry( struct pt_regs *regs) { - ptrace_report_syscall(regs); - return 0; + return ptrace_report_syscall(regs); } /** @@ -152,7 +154,6 @@ static inline void tracehook_signal_handler(int sig, siginfo_t *info, ptrace_notify(SIGTRAP); } -#ifdef TIF_NOTIFY_RESUME /** * set_notify_resume - cause tracehook_notify_resume() to be called * @task: task that will call tracehook_notify_resume() @@ -164,8 +165,10 @@ static inline void tracehook_signal_handler(int sig, siginfo_t *info, */ static inline void set_notify_resume(struct task_struct *task) { +#ifdef TIF_NOTIFY_RESUME if (!test_and_set_tsk_thread_flag(task, TIF_NOTIFY_RESUME)) kick_process(task); +#endif } /** @@ -183,7 +186,14 @@ static inline void set_notify_resume(struct task_struct *task) */ static inline void tracehook_notify_resume(struct pt_regs *regs) { + /* + * The caller just cleared TIF_NOTIFY_RESUME. This barrier + * pairs with task_work_add()->set_notify_resume() after + * hlist_add_head(task->task_works); + */ + smp_mb__after_atomic(); + if (unlikely(current->task_works)) + task_work_run(); } -#endif /* TIF_NOTIFY_RESUME */ #endif /* <linux/tracehook.h> */ |