RDMA/srp: Do not call scsi_done() from srp_abort()

commit e193b7955dfad68035b983a0011f4ef3590c85eb upstream.

After scmd_eh_abort_handler() has called the SCSI LLD eh_abort_handler
callback, it performs one of the following actions:
* Call scsi_queue_insert().
* Call scsi_finish_command().
* Call scsi_eh_scmd_add().
Hence, SCSI abort handlers must not call scsi_done(). Otherwise all
the above actions would trigger a use-after-free. Hence remove the
scsi_done() call from srp_abort(). Keep the srp_free_req() call
before returning SUCCESS because we may not see the command again if
SUCCESS is returned.

Cc: Bob Pearson <rpearsonhpe@gmail.com>
Cc: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Fixes: d8536670916a ("IB/srp: Avoid having aborted requests hang")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230823205727.505681-1-bvanassche@acm.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index a7580c4..c4dcef7 100644 (file)
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -2789,7 +2789,6 @@ static int srp_abort(struct scsi_cmnd *scmnd)
        u32 tag;
        u16 ch_idx;
        struct srp_rdma_ch *ch;
-       int ret;
 
        shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n");
 
@@ -2803,19 +2802,14 @@ static int srp_abort(struct scsi_cmnd *scmnd)
        shost_printk(KERN_ERR, target->scsi_host,
                     "Sending SRP abort for tag %#x\n", tag);
        if (srp_send_tsk_mgmt(ch, tag, scmnd->device->lun,
-                             SRP_TSK_ABORT_TASK, NULL) == 0)
-               ret = SUCCESS;
-       else if (target->rport->state == SRP_RPORT_LOST)
-               ret = FAST_IO_FAIL;
-       else
-               ret = FAILED;
-       if (ret == SUCCESS) {
+                             SRP_TSK_ABORT_TASK, NULL) == 0) {
                srp_free_req(ch, req, scmnd, 0);
-               scmnd->result = DID_ABORT << 16;
-               scsi_done(scmnd);
+               return SUCCESS;
        }
+       if (target->rport->state == SRP_RPORT_LOST)
+               return FAST_IO_FAIL;
 
-       return ret;
+       return FAILED;
 }
 
 static int srp_reset_device(struct scsi_cmnd *scmnd)