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authorBart Van Assche <bvanassche@acm.org>2012-08-24 10:27:54 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-07 08:32:29 -0700
commit0e4765fd9c0f8df577e0b8cbea927c2051710f27 (patch)
tree865fee5c7fbeaa9dd8c2967ccea91076dfc7b4a6 /drivers/infiniband
parent350f3edb0a05c340853c75f4c5007a72ebd9e32f (diff)
IB/srp: Fix use-after-free in srp_reset_req()
commit 9b796d06d5d1b1e85ae2316a283ea11dd739ef96 upstream. srp_free_req() uses the scsi_cmnd structure contents to unmap buffers, so we must invoke srp_free_req() before we release ownership of that structure. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Acked-by: David Dillow <dillowda@ornl.gov> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 1b5b0c730054..ac66e6b43ee2 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -638,9 +638,9 @@ static void srp_reset_req(struct srp_target_port *target, struct srp_request *re
struct scsi_cmnd *scmnd = srp_claim_req(target, req, NULL);
if (scmnd) {
+ srp_free_req(target, req, scmnd, 0);
scmnd->result = DID_RESET << 16;
scmnd->scsi_done(scmnd);
- srp_free_req(target, req, scmnd, 0);
}
}