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

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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>
This commit is contained in:
Bart Van Assche 2023-08-23 13:57:27 -07:00 committed by Leon Romanovsky
parent 0bb80ecc33
commit e193b7955d
1 changed files with 5 additions and 11 deletions
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16
drivers/infiniband/ulp/srp/ib_srp.c
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@ -2784,7 +2784,6 @@ 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");
@ -2798,19 +2797,14 @@ 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)