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block/iscsi: fix double-free on BUSY or similar statuses

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Commit 8c460269aa ("iscsi: base all handling of check condition on
scsi_sense_to_errno", 2019-07-15) removed a "goto out" so that the
same coroutine is re-entered twice; once from iscsi_co_generic_cb,
once from the timer callback iscsi_retry_timer_expired.  This can
cause a crash.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1378
Reported-by: Grzegorz Zdanowski <https://gitlab.com/kiler129>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 5080152e2e)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Paolo Bonzini 2023-01-10 17:36:33 +01:00 committed by Michael Tokarev
parent f163cf6be4
commit 856a67cade
1 changed files with 1 additions and 0 deletions
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block/iscsi.c
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@ -268,6 +268,7 @@ iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
timer_mod(&iTask->retry_timer,
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time);
iTask->do_retry = 1;
return;
} else if (status == SCSI_STATUS_CHECK_CONDITION) {
int error = iscsi_translate_sense(&task->sense);
if (error == EAGAIN) {