diff options
| author | Prasad J Pandit <pjp@fedoraproject.org> | 2016-01-11 14:10:42 -0500 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:28:23 -0600 |
| commit | 88f13db4a7fa26f35289c3b9003fa14d27db31b4 (patch) | |
| tree | 902e4884023980baf6c23e1cb9177b5febff5f62 | |
| parent | 182d517797c9f210c9b00c94e326637583427949 (diff) | |
| download | hqemu-88f13db4a7fa26f35289c3b9003fa14d27db31b4.zip hqemu-88f13db4a7fa26f35289c3b9003fa14d27db31b4.tar.gz | |
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>
| -rw-r--r-- | hw/ide/ahci.c | 1 |
1 files changed, 1 insertions, 0 deletions
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) |
