40 lines
1.4 KiB
Diff
40 lines
1.4 KiB
Diff
|
From 4ab0359a8ae182a7ac5c99609667273167703fab Mon Sep 17 00:00:00 2001
|
||
|
|
From: Prasad J Pandit <pjp@fedoraproject.org>
|
||
|
|
Date: Mon, 11 Jan 2016 14:10:42 -0500
|
||
|
|
Subject: [PATCH] ide: ahci: reset ncq object to unused on error
|
||
|
|
|
||
|
|
When processing NCQ commands, AHCI device emulation prepares a
|
||
|
|
NCQ transfer object; To which an aio control block(aiocb) object
|
||
|
|
is assigned in 'execute_ncq_command'. In case, when the NCQ
|
||
|
|
command is invalid, the 'aiocb' object is not assigned, and NCQ
|
||
|
|
transfer object is left as 'used'. This leads to a use after
|
||
|
|
free kind of error in 'bdrv_aio_cancel_async' via 'ahci_reset_port'.
|
||
|
|
Reset NCQ transfer object to 'unused' to avoid it.
|
||
|
|
|
||
|
|
[Maintainer edit: s/ACHI/AHCI/ in the commit message. --js]
|
||
|
|
|
||
|
|
Reported-by: Qinghao Tang <luodalongde@gmail.com>
|
||
|
|
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
|
||
|
|
Reviewed-by: John Snow <jsnow@redhat.com>
|
||
|
|
Message-id: 1452282511-4116-1-git-send-email-ppandit@redhat.com
|
||
|
|
Signed-off-by: John Snow <jsnow@redhat.com>
|
||
|
|
---
|
||
|
|
hw/ide/ahci.c | 1 +
|
||
|
|
1 file changed, 1 insertion(+)
|
||
|
|
|
||
|
|
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
|
||
|
|
index dd1912e..17f1cbd 100644
|
||
|
|
--- a/hw/ide/ahci.c
|
||
|
|
+++ b/hw/ide/ahci.c
|
||
|
|
@@ -910,6 +910,7 @@ static void ncq_err(NCQTransferState *ncq_tfs)
|
||
|
|
ide_state->error = ABRT_ERR;
|
||
|
|
ide_state->status = READY_STAT | ERR_STAT;
|
||
|
|
ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag);
|
||
|
|
+ ncq_tfs->used = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ncq_finish(NCQTransferState *ncq_tfs)
|
||
|
|
--
|
||
|
|
2.6.3
|
||
|
|
|