Merge tag 'v5.13-rc2' into spi-5.13

Linux 5.13-rc2

5 files changed, 25 insertions, 23 deletions

diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 1743506081da..2cb8dfe866b6 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -177,7 +177,7 @@ tracesys:
 
 	; Do the Sys Call as we normally would.
 	; Validate the Sys Call number
-	cmp     r8,  NR_syscalls
+	cmp     r8,  NR_syscalls - 1
 	mov.hi  r0, -ENOSYS
 	bhi     tracesys_exit
 
@@ -255,7 +255,7 @@ ENTRY(EV_Trap)
 	;============ Normal syscall case
 
 	; syscall num shd not exceed the total system calls avail
-	cmp     r8,  NR_syscalls
+	cmp     r8,  NR_syscalls - 1
 	mov.hi  r0, -ENOSYS
 	bhi     .Lret_from_system_call
 
diff --git a/arch/arc/kernel/kgdb.c b/arch/arc/kernel/kgdb.c
index ecfbc42d3a40..345a0000554c 100644
--- a/arch/arc/kernel/kgdb.c
+++ b/arch/arc/kernel/kgdb.c
@@ -140,6 +140,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 		ptr = &remcomInBuffer[1];
 		if (kgdb_hex2long(&ptr, &addr))
 			regs->ret = addr;
+		fallthrough;
 
 	case 'D':
 	case 'k':
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index d838d0d57696..3793876f42d9 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -50,14 +50,14 @@ SYSCALL_DEFINE3(arc_usr_cmpxchg, int *, uaddr, int, expected, int, new)
 	int ret;
 
 	/*
-	 * This is only for old cores lacking LLOCK/SCOND, which by defintion
+	 * This is only for old cores lacking LLOCK/SCOND, which by definition
 	 * can't possibly be SMP. Thus doesn't need to be SMP safe.
 	 * And this also helps reduce the overhead for serializing in
 	 * the UP case
 	 */
 	WARN_ON_ONCE(IS_ENABLED(CONFIG_SMP));
 
-	/* Z indicates to userspace if operation succeded */
+	/* Z indicates to userspace if operation succeeded */
 	regs->status32 &= ~STATUS_Z_MASK;
 
 	ret = access_ok(uaddr, sizeof(*uaddr));
@@ -107,7 +107,7 @@ fail:
 
 void arch_cpu_idle(void)
 {
-	/* Re-enable interrupts <= default irq priority before commiting SLEEP */
+	/* Re-enable interrupts <= default irq priority before committing SLEEP */
 	const unsigned int arg = 0x10 | ARCV2_IRQ_DEF_PRIO;
 
 	__asm__ __volatile__(
@@ -120,7 +120,7 @@ void arch_cpu_idle(void)
 
 void arch_cpu_idle(void)
 {
-	/* sleep, but enable both set E1/E2 (levels of interrutps) before committing */
+	/* sleep, but enable both set E1/E2 (levels of interrupts) before committing */
 	__asm__ __volatile__("sleep 0x3	\n");
 }
 
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index a78d8f745a67..b3ccb9e5ffe4 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -96,7 +96,7 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs,
 			     sizeof(sf->uc.uc_mcontext.regs.scratch));
 	err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
 
-	return err;
+	return err ? -EFAULT : 0;
 }
 
 static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
@@ -110,7 +110,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
 				&(sf->uc.uc_mcontext.regs.scratch),
 				sizeof(sf->uc.uc_mcontext.regs.scratch));
 	if (err)
-		return err;
+		return -EFAULT;
 
 	set_current_blocked(&set);
 	regs->bta	= uregs.scratch.bta;
@@ -259,7 +259,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
 		regs->r2 = (unsigned long)&sf->uc;
 
 		/*
-		 * small optim to avoid unconditonally calling do_sigaltstack
+		 * small optim to avoid unconditionally calling do_sigaltstack
 		 * in sigreturn path, now that we only have rt_sigreturn
 		 */
 		magic = MAGIC_SIGALTSTK;
@@ -391,7 +391,7 @@ void do_signal(struct pt_regs *regs)
 void do_notify_resume(struct pt_regs *regs)
 {
 	/*
-	 * ASM glue gaurantees that this is only called when returning to
+	 * ASM glue guarantees that this is only called when returning to
 	 * user mode
 	 */
 	if (test_thread_flag(TIF_NOTIFY_RESUME))
diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index 74ad4256022e..47bab67f8649 100644
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -187,25 +187,26 @@ static void init_unwind_table(struct unwind_table *table, const char *name,
 			      const void *table_start, unsigned long table_size,
 			      const u8 *header_start, unsigned long header_size)
 {
-	const u8 *ptr = header_start + 4;
-	const u8 *end = header_start + header_size;
-
 	table->core.pc = (unsigned long)core_start;
 	table->core.range = core_size;
 	table->init.pc = (unsigned long)init_start;
 	table->init.range = init_size;
 	table->address = table_start;
 	table->size = table_size;
-
-	/* See if the linker provided table looks valid. */
-	if (header_size <= 4
-	    || header_start[0] != 1
-	    || (void *)read_pointer(&ptr, end, header_start[1]) != table_start
-	    || header_start[2] == DW_EH_PE_omit
-	    || read_pointer(&ptr, end, header_start[2]) <= 0
-	    || header_start[3] == DW_EH_PE_omit)
-		header_start = NULL;
-
+	/* To avoid the pointer addition with NULL pointer.*/
+	if (header_start != NULL) {
+		const u8 *ptr = header_start + 4;
+		const u8 *end = header_start + header_size;
+		/* See if the linker provided table looks valid. */
+		if (header_size <= 4
+		|| header_start[0] != 1
+		|| (void *)read_pointer(&ptr, end, header_start[1])
+				!= table_start
+		|| header_start[2] == DW_EH_PE_omit
+		|| read_pointer(&ptr, end, header_start[2]) <= 0
+		|| header_start[3] == DW_EH_PE_omit)
+			header_start = NULL;
+	}
 	table->hdrsz = header_size;
 	smp_wmb();
 	table->header = header_start;