diff options
| author | Gregory Price <gourry.memverge@gmail.com> | 2023-04-07 13:18:31 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-04-16 14:23:07 +0200 |
| commit | 43360686328b1f4b7d9dcc883ee9243ad7c16fae (patch) | |
| tree | 2f46828f3e22746400b35a974722b5b452d42653 | |
| parent | 09a9639e56c01c7a00d6c0ca63f4c7c41abe075d (diff) | |
syscall_user_dispatch: Split up set_syscall_user_dispatch()
syscall user dispatch configuration is not covered by checkpoint/restore.
To prepare for ptrace access to the syscall user dispatch configuration,
move the inner working of set_syscall_user_dispatch() into a helper
function. Make the helper function task pointer based and let
set_syscall_user_dispatch() invoke it with task=current.
No functional change.
Signed-off-by: Gregory Price <gregory.price@memverge.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20230407171834.3558-2-gregory.price@memverge.com
| -rw-r--r-- | kernel/entry/syscall_user_dispatch.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/kernel/entry/syscall_user_dispatch.c b/kernel/entry/syscall_user_dispatch.c index 0b6379adff6b..22396b234854 100644 --- a/kernel/entry/syscall_user_dispatch.c +++ b/kernel/entry/syscall_user_dispatch.c @@ -68,8 +68,9 @@ bool syscall_user_dispatch(struct pt_regs *regs) return true; } -int set_syscall_user_dispatch(unsigned long mode, unsigned long offset, - unsigned long len, char __user *selector) +static int task_set_syscall_user_dispatch(struct task_struct *task, unsigned long mode, + unsigned long offset, unsigned long len, + char __user *selector) { switch (mode) { case PR_SYS_DISPATCH_OFF: @@ -94,15 +95,21 @@ int set_syscall_user_dispatch(unsigned long mode, unsigned long offset, return -EINVAL; } - current->syscall_dispatch.selector = selector; - current->syscall_dispatch.offset = offset; - current->syscall_dispatch.len = len; - current->syscall_dispatch.on_dispatch = false; + task->syscall_dispatch.selector = selector; + task->syscall_dispatch.offset = offset; + task->syscall_dispatch.len = len; + task->syscall_dispatch.on_dispatch = false; if (mode == PR_SYS_DISPATCH_ON) - set_syscall_work(SYSCALL_USER_DISPATCH); + set_task_syscall_work(task, SYSCALL_USER_DISPATCH); else - clear_syscall_work(SYSCALL_USER_DISPATCH); + clear_task_syscall_work(task, SYSCALL_USER_DISPATCH); return 0; } + +int set_syscall_user_dispatch(unsigned long mode, unsigned long offset, + unsigned long len, char __user *selector) +{ + return task_set_syscall_user_dispatch(current, mode, offset, len, selector); +} |