From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 11 Nov 2021 00:15:54 +0000 (-0800)
Subject: Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel... 
X-Git-Tag: v6.6.17~8851
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5147da902e0dd162c6254a61e4c57f21b60a9b1c;p=platform%2Fkernel%2Flinux-rpi.git

Merge branch 'exit-cleanups-for-v5.16' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull exit cleanups from Eric Biederman:
 "While looking at some issues related to the exit path in the kernel I
  found several instances where the code is not using the existing
  abstractions properly.

  This set of changes introduces force_fatal_sig a way of sending a
  signal and not allowing it to be caught, and corrects the misuse of
  the existing abstractions that I found.

  A lot of the misuse of the existing abstractions are silly things such
  as doing something after calling a no return function, rolling BUG by
  hand, doing more work than necessary to terminate a kernel thread, or
  calling do_exit(SIGKILL) instead of calling force_sig(SIGKILL).

  In the review a deficiency in force_fatal_sig and force_sig_seccomp
  where ptrace or sigaction could prevent the delivery of the signal was
  found. I have added a change that adds SA_IMMUTABLE to change that
  makes it impossible to interrupt the delivery of those signals, and
  allows backporting to fix force_sig_seccomp

  And Arnd found an issue where a function passed to kthread_run had the
  wrong prototype, and after my cleanup was failing to build."

* 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (23 commits)
  soc: ti: fix wkup_m3_rproc_boot_thread return type
  signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed
  signal: Replace force_sigsegv(SIGSEGV) with force_fatal_sig(SIGSEGV)
  exit/r8188eu: Replace the macro thread_exit with a simple return 0
  exit/rtl8712: Replace the macro thread_exit with a simple return 0
  exit/rtl8723bs: Replace the macro thread_exit with a simple return 0
  signal/x86: In emulate_vsyscall force a signal instead of calling do_exit
  signal/sparc32: In setup_rt_frame and setup_fram use force_fatal_sig
  signal/sparc32: Exit with a fatal signal when try_to_clear_window_buffer fails
  exit/syscall_user_dispatch: Send ordinary signals on failure
  signal: Implement force_fatal_sig
  exit/kthread: Have kernel threads return instead of calling do_exit
  signal/s390: Use force_sigsegv in default_trap_handler
  signal/vm86_32: Properly send SIGSEGV when the vm86 state cannot be saved.
  signal/vm86_32: Replace open coded BUG_ON with an actual BUG_ON
  signal/sparc: In setup_tsb_params convert open coded BUG into BUG
  signal/powerpc: On swapcontext failure force SIGSEGV
  signal/sh: Use force_sig(SIGKILL) instead of do_group_exit(SIGKILL)
  signal/mips: Update (_save|_restore)_fp_context to fail with -EFAULT
  signal/sparc32: Remove unreachable do_exit in do_sparc_fault
  ...
---

5147da902e0dd162c6254a61e4c57f21b60a9b1c
diff --cc drivers/staging/r8188eu/core/rtw_cmd.c
index 5d5f253,d37c946..48869a7
--- a/drivers/staging/r8188eu/core/rtw_cmd.c
+++ b/drivers/staging/r8188eu/core/rtw_cmd.c
@@@ -321,11 -345,43 +321,11 @@@ post_process
  		rtw_free_cmd_obj(pcmd);
  	} while (1);
  
 -	up(&pcmdpriv->terminate_cmdthread_sema);
 +	complete(&pcmdpriv->stop_cmd_thread);
  
- 	thread_exit();
+ 	return 0;
  }
  
 -u8 rtw_setstandby_cmd(struct adapter *padapter, uint action)
 -{
 -	struct cmd_obj *ph2c;
 -	struct usb_suspend_parm *psetusbsuspend;
 -	struct cmd_priv	*pcmdpriv = &padapter->cmdpriv;
 -
 -	u8 ret = _SUCCESS;
 -
 -	ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
 -	if (!ph2c) {
 -		ret = _FAIL;
 -		goto exit;
 -	}
 -
 -	psetusbsuspend = kzalloc(sizeof(struct usb_suspend_parm), GFP_ATOMIC);
 -	if (!psetusbsuspend) {
 -		kfree(ph2c);
 -		ret = _FAIL;
 -		goto exit;
 -	}
 -
 -	psetusbsuspend->action = action;
 -
 -	init_h2fwcmd_w_parm_no_rsp(ph2c, psetusbsuspend, GEN_CMD_CODE(_SetUsbSuspend));
 -
 -	ret = rtw_enqueue_cmd(pcmdpriv, ph2c);
 -
 -exit:
 -
 -	return ret;
 -}
 -
  /*
  rtw_sitesurvey_cmd(~)
  	### NOTE:#### (!!!!)
diff --cc drivers/staging/rtl8723bs/core/rtw_cmd.c
index 639459d,8e69f9c..bd24d91
--- a/drivers/staging/rtl8723bs/core/rtw_cmd.c
+++ b/drivers/staging/rtl8723bs/core/rtw_cmd.c
@@@ -516,9 -522,9 +516,9 @@@ post_process
  	} while (1);
  
  	complete(&pcmdpriv->terminate_cmdthread_comp);
 -	atomic_set(&(pcmdpriv->cmdthd_running), false);
 +	atomic_set(&pcmdpriv->cmdthd_running, false);
  
- 	thread_exit();
+ 	return 0;
  }
  
  /*