diff mbox series

[v2,16/22] kernel/events/uprobes: Use vma_lookup() in find_active_uprobe()

Message ID 20210521174745.2219620-17-Liam.Howlett@Oracle.com (mailing list archive)
State New, archived
Headers show
Series mm: Add vma_lookup() | expand

Commit Message

Liam R. Howlett May 21, 2021, 5:48 p.m. UTC 
Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
---
 kernel/events/uprobes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 6addc9780319..907d4ee00cb2 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -2046,8 +2046,8 @@  static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp)
 	struct vm_area_struct *vma;
 
 	mmap_read_lock(mm);
-	vma = find_vma(mm, bp_vaddr);
-	if (vma && vma->vm_start <= bp_vaddr) {
+	vma = vma_lookup(mm, bp_vaddr);
+	if (vma) {
 		if (valid_vma(vma, false)) {
 			struct inode *inode = file_inode(vma->vm_file);
 			loff_t offset = vaddr_to_offset(vma, bp_vaddr);