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net/ipv5/tcp: use vma_lookup() in tcp_zerocopy_receive()

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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>
This commit is contained in:
Liam Howlett 2021-06-28 19:39:23 -07:00 committed by Linus Torvalds
parent 85715d6809
commit 47bdd1db16
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/tcp.c
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@ -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;
}