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-rw-r--r--arch/arc/kernel/troubleshoot.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index 73a7450ee622..1badf9b84b51 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -86,12 +86,13 @@ static void show_faulting_vma(unsigned long address, char *buf)
unsigned long ino = 0;
dev_t dev = 0;
char *nm = buf;
+ struct mm_struct *active_mm = current->active_mm;
/* can't use print_vma_addr() yet as it doesn't check for
* non-inclusive vma
*/
-
- vma = find_vma(current->active_mm, address);
+ down_read(&active_mm->mmap_sem);
+ vma = find_vma(active_mm, address);
/* check against the find_vma( ) behaviour which returns the next VMA
* if the container VMA is not found
@@ -110,9 +111,10 @@ static void show_faulting_vma(unsigned long address, char *buf)
vma->vm_start < TASK_UNMAPPED_BASE ?
address : address - vma->vm_start,
nm, vma->vm_start, vma->vm_end);
- } else {
+ } else
pr_info(" @No matching VMA found\n");
- }
+
+ up_read(&active_mm->mmap_sem);
}
static void show_ecr_verbose(struct pt_regs *regs)