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| author | Prasad J Pandit <pjp@fedoraproject.org> | 2016-01-11 14:10:42 -0500 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2016-01-11 14:10:42 -0500 |
| commit | 4ab0359a8ae182a7ac5c99609667273167703fab (patch) | |
| tree | eef66e493a427e7af812f86ca33cd8a21c0ba36e /hw/ide | |
| parent | 97225170f6ee6d0ad8653916c7a5e4508cbffc18 (diff) | |
| download | qemu-4ab0359a8ae182a7ac5c99609667273167703fab.zip qemu-4ab0359a8ae182a7ac5c99609667273167703fab.tar.gz qemu-4ab0359a8ae182a7ac5c99609667273167703fab.tar.bz2 | |
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>
Diffstat (limited to 'hw/ide')
| -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) |