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authorLiam Howlett <liam.howlett@oracle.com>2021-06-29 05:39:23 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 20:53:51 +0300
commit47bdd1db16e67ebfde6f77eaf7625b2292ae6d58 (patch)
treecc3f84a4f075a0075918d445868ef147945f6f25 /net
parent85715d6809014870a8a4d498b292fc5711a969e7 (diff)
downloadlinux-47bdd1db16e67ebfde6f77eaf7625b2292ae6d58.tar.xz
net/ipv5/tcp: use vma_lookup() in tcp_zerocopy_receive()
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. Link: https://lkml.kernel.org/r/20210521174745.2219620-13-Liam.Howlett@Oracle.com 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> Cc: David Miller <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/tcp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f1c1f9e3de72..64bf179cc915 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2095,8 +2095,8 @@ static int tcp_zerocopy_receive(struct sock *sk,
mmap_read_lock(current->mm);
- vma = find_vma(current->mm, address);
- if (!vma || vma->vm_start > address || vma->vm_ops != &tcp_vm_ops) {
+ vma = vma_lookup(current->mm, address);
+ if (!vma || vma->vm_ops != &tcp_vm_ops) {
mmap_read_unlock(current->mm);
return -EINVAL;
}