6.1-stable review patch. If anyone has any objections, please let me know.
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From: Bart Van Assche bvanassche@acm.org
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 --- drivers/infiniband/ulp/srp/ib_srp.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-)
--- 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 *s 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 *s 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)