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| author | Oleg Nesterov <oleg@redhat.com> | 2024-01-22 18:16:31 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-23 00:38:52 +0100 |
| commit | 08701813a1b439f01e52c10e66ee2e99d9d23c6c (patch) | |
| tree | 2fa580f2642228f8f054a639a83ec76f093429ed /kernel/ptrace.c | |
| parent | flex_proportions: remove unused fprop_local_single (diff) | |
| download | linux-08701813a1b439f01e52c10e66ee2e99d9d23c6c.tar.xz linux-08701813a1b439f01e52c10e66ee2e99d9d23c6c.zip | |
ptrace_attach: shift send(SIGSTOP) into ptrace_set_stopped()
Turn send_sig_info(SIGSTOP) into send_signal_locked(SIGSTOP) and move it
from ptrace_attach() to ptrace_set_stopped().
This looks more logical and avoids lock(siglock) right after unlock().
Link: https://lkml.kernel.org/r/20240122171631.GA29844@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/ptrace.c')
| -rw-r--r-- | kernel/ptrace.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 2fabd497d659..d5f89f9ef29f 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -375,10 +375,13 @@ static int check_ptrace_options(unsigned long data) return 0; } -static inline void ptrace_set_stopped(struct task_struct *task) +static inline void ptrace_set_stopped(struct task_struct *task, bool seize) { guard(spinlock)(&task->sighand->siglock); + /* SEIZE doesn't trap tracee on attach */ + if (!seize) + send_signal_locked(SIGSTOP, SEND_SIG_PRIV, task, PIDTYPE_PID); /* * If the task is already STOPPED, set JOBCTL_TRAP_STOP and * TRAPPING, and kick it so that it transits to TRACED. TRAPPING @@ -457,14 +460,8 @@ static int ptrace_attach(struct task_struct *task, long request, return -EPERM; task->ptrace = flags; - ptrace_link(task, current); - - /* SEIZE doesn't trap tracee on attach */ - if (!seize) - send_sig_info(SIGSTOP, SEND_SIG_PRIV, task); - - ptrace_set_stopped(task); + ptrace_set_stopped(task, seize); } } |