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| author | Elena Reshetova <elena.reshetova@intel.com> | 2017-03-09 13:46:58 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-03-15 18:44:39 -0400 |
| commit | 6dc618cdd6b896791313926becb1f86ede0e046a (patch) | |
| tree | e4b0637932e6f5ce980720b12fc253e6bfcf2b74 /drivers/scsi/libiscsi.c | |
| parent | 22c70d1a9c639b432ffdf083bea44752ad9fc8f3 (diff) | |
| download | lwn-6dc618cdd6b896791313926becb1f86ede0e046a.tar.gz lwn-6dc618cdd6b896791313926becb1f86ede0e046a.zip | |
scsi: libiscsi: qedi: convert iscsi_task.refcount from atomic_t to refcount_t
refcount_t type and corresponding API should be used instead of atomic_t
when the variable is used as a reference counter. This allows to avoid
accidental refcounter overflows that might lead to use-after-free
situations.
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Acked-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 07c08ce68d70..ec38a18c7fab 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -517,13 +517,13 @@ static void iscsi_free_task(struct iscsi_task *task) void __iscsi_get_task(struct iscsi_task *task) { - atomic_inc(&task->refcount); + refcount_inc(&task->refcount); } EXPORT_SYMBOL_GPL(__iscsi_get_task); void __iscsi_put_task(struct iscsi_task *task) { - if (atomic_dec_and_test(&task->refcount)) + if (refcount_dec_and_test(&task->refcount)) iscsi_free_task(task); } EXPORT_SYMBOL_GPL(__iscsi_put_task); @@ -745,7 +745,7 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, * released by the lld when it has transmitted the task for * pdus we do not expect a response for. */ - atomic_set(&task->refcount, 1); + refcount_set(&task->refcount, 1); task->conn = conn; task->sc = NULL; INIT_LIST_HEAD(&task->running); @@ -1617,7 +1617,7 @@ static inline struct iscsi_task *iscsi_alloc_task(struct iscsi_conn *conn, sc->SCp.phase = conn->session->age; sc->SCp.ptr = (char *) task; - atomic_set(&task->refcount, 1); + refcount_set(&task->refcount, 1); task->state = ISCSI_TASK_PENDING; task->conn = conn; task->sc = sc; |