change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/fs/fcntl.c
..
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@@ -148,12 +148,17 @@
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148
 
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 pid_t f_getown(struct file *filp)
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 {
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-	pid_t pid;
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-	read_lock(&filp->f_owner.lock);
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-	pid = pid_vnr(filp->f_owner.pid);
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-	if (filp->f_owner.pid_type == PIDTYPE_PGID)
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-		pid = -pid;
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-	read_unlock(&filp->f_owner.lock);
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+	pid_t pid = 0;
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+
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+	read_lock_irq(&filp->f_owner.lock);
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+	rcu_read_lock();
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+	if (pid_task(filp->f_owner.pid, filp->f_owner.pid_type)) {
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+		pid = pid_vnr(filp->f_owner.pid);
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+		if (filp->f_owner.pid_type == PIDTYPE_PGID)
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+			pid = -pid;
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+	}
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+	rcu_read_unlock();
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+	read_unlock_irq(&filp->f_owner.lock);
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 	return pid;
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 }
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@@ -200,11 +205,14 @@
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 static int f_getown_ex(struct file *filp, unsigned long arg)
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 {
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 	struct f_owner_ex __user *owner_p = (void __user *)arg;
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-	struct f_owner_ex owner;
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+	struct f_owner_ex owner = {};
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 	int ret = 0;
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-	read_lock(&filp->f_owner.lock);
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-	owner.pid = pid_vnr(filp->f_owner.pid);
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+	read_lock_irq(&filp->f_owner.lock);
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+	rcu_read_lock();
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+	if (pid_task(filp->f_owner.pid, filp->f_owner.pid_type))
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+		owner.pid = pid_vnr(filp->f_owner.pid);
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+	rcu_read_unlock();
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 	switch (filp->f_owner.pid_type) {
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 	case PIDTYPE_PID:
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 		owner.type = F_OWNER_TID;
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@@ -223,7 +231,7 @@
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 		ret = -EINVAL;
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 		break;
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 	}
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-	read_unlock(&filp->f_owner.lock);
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+	read_unlock_irq(&filp->f_owner.lock);
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 	if (!ret) {
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 		ret = copy_to_user(owner_p, &owner, sizeof(owner));
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@@ -241,10 +249,10 @@
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 	uid_t src[2];
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 	int err;
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-	read_lock(&filp->f_owner.lock);
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+	read_lock_irq(&filp->f_owner.lock);
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 	src[0] = from_kuid(user_ns, filp->f_owner.uid);
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 	src[1] = from_kuid(user_ns, filp->f_owner.euid);
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-	read_unlock(&filp->f_owner.lock);
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+	read_unlock_irq(&filp->f_owner.lock);
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 	err  = put_user(src[0], &dst[0]);
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 	err |= put_user(src[1], &dst[1]);
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@@ -261,7 +269,7 @@
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 static bool rw_hint_valid(enum rw_hint hint)
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 {
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 	switch (hint) {
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-	case RWF_WRITE_LIFE_NOT_SET:
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+	case RWH_WRITE_LIFE_NOT_SET:
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 	case RWH_WRITE_LIFE_NONE:
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 	case RWH_WRITE_LIFE_SHORT:
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 	case RWH_WRITE_LIFE_MEDIUM:
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@@ -277,7 +285,7 @@
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 			  unsigned long arg)
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 {
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 	struct inode *inode = file_inode(file);
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-	u64 *argp = (u64 __user *)arg;
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+	u64 __user *argp = (u64 __user *)arg;
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 	enum rw_hint hint;
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 	u64 h;
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..
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@@ -362,7 +370,7 @@
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 	case F_OFD_SETLK:
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 	case F_OFD_SETLKW:
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 #endif
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-		/* Fallthrough */
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+		fallthrough;
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 	case F_SETLK:
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 	case F_SETLKW:
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 		if (copy_from_user(&flock, argp, sizeof(flock)))
..
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@@ -735,8 +743,9 @@
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 		return;
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 	switch (signum) {
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-		siginfo_t si;
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-		default:
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+		default: {
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+			kernel_siginfo_t si;
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+
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 			/* Queue a rt signal with the appropriate fd as its
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 			   value.  We use SI_SIGIO as the source, not 
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 			   SI_KERNEL, since kernel signals always get 
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@@ -769,7 +778,8 @@
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 			si.si_fd    = fd;
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 			if (!do_send_sig_info(signum, &si, p, type))
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 				break;
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-		/* fall-through: fall back on the old plain SIGIO signal */
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+		}
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+			fallthrough;	/* fall back on the old plain SIGIO signal */
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 		case 0:
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 			do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, type);
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 	}