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RDS: null pointer dereference in rds_atomic_free_op

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[ Upstream commit 7d11f77f84b27cef452cee332f4e469503084737 ]

set rm->atomic.op_active to 0 when rds_pin_pages() fails
or the user supplied address is invalid,
this prevents a NULL pointer usage in rds_atomic_free_op()

Signed-off-by: Mohamed Ghannam <simo.ghannam@gmail.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mohamed Ghannam 2018-01-03 21:06:06 +00:00 • committed by Greg Kroah-Hartman
parent 10d06ed9a1
commit 44496521c6
1 changed files with 1 additions and 0 deletions
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net/rds/rdma.c
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@ -869,6 +869,7 @@ int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm,
err:
if (page)
put_page(page);
rm->atomic.op_active = 0;
kfree(rm->atomic.op_notifier);
return ret;