Instead of trying to implement something that isn't well specified,
remove it. (it would be tricky to implement, since a class struct is
memcpy on children types...)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181204142023.15982-7-marcandre.lureau@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
The function is only used by a test, move it there.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20181204142023.15982-6-marcandre.lureau@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
global_props is only used for Xen xen_compat_props. It's a static
array of GlobalProperty, like machine globals in SET_MACHINE_COMPAT().
Let's register the globals the same way, without extra copy allocation.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20181204142023.15982-5-marcandre.lureau@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Instead of accepting any Object*, change user_creatable_complete() to
require a UserCreatable*. Modify the callers to pass the appropriate
argument, removing redundant dynamic cast checks in object creation.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181204142023.15982-4-marcandre.lureau@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Instead of setting suppress_vmdesc at instance_init time, set
default_machine_opts on pc_i440fx_2_2_machine_options() to
implement equivalent behavior.
This will let us eliminate the need for pc_compat_*() functions
for PC machine-types.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181205205827.19387-6-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Now that all instance_options functions for spapr are empty,
delete them.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181205205827.19387-5-ehabkost@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Instead of setting suppress_vmdesc at instance_init time, set
default_machine_opts on spapr_machine_2_2_class_options() to
implement equivalent behavior.
This will let us eliminate the need for separate instance_init
functions for each spapr machine-type.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181205205827.19387-4-ehabkost@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Instead of setting use_hotplug_event_source at instance_init
time, set default_machine_opts on spapr_machine_2_7_class_options()
to implement equivalent behavior.
This will let us eliminate the need for separate instance_init
functions for each spapr machine-type.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181205205827.19387-3-ehabkost@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
All instance_init functions for all virt machine-types run
exactly the same code, so we don't need separate functions. We
only need to set instance_init for TYPE_VIRT_MACHINE.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181205205827.19387-2-ehabkost@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Including all machine types that might have a pcie-root-port.
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Message-Id: <154394083644.28192.8501647946108201466.stgit@gimli.home>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
[ehabkost: fixed accidental recursion at spapr_machine_3_1_class_options()]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This makes their function more clear and prevents conflicts when adding
the actual devices to the machine state, if necessary.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181107152434.22219-1-minyard@acm.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Should not be a problem right now, but it could theoretically happen
in the future.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20181023152306.3123-7-david@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Shorter and easier to read.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20181023152306.3123-6-david@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
The code was converted to use sun4v_rtc_read() by mistake, fix
it.
Reported-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20181031001843.12892-1-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
While performing block transfer write in smb_ioport_writeb(),
'smb_index' is incremented and used to index smb_data[] array.
Check 'smb_index' value to avoid OOB access.
Note that this bug is exploitable by a guest to escape
from the virtual machine. However the commit which
introduced the bug was only made after the 3.0 release,
and so it is not present in any released QEMU versions.
Fixes: 38ad4fae43 i2c: pm_smbus: Add block transfer capability
Reported-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Michael Hanselmann <public@hansmi.ch>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20181206121830.6177-1-ppandit@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Slash is unix directory separator, so they are not allowed in filenames.
Note this also stops the classic escape via "../".
Fixes: CVE-2018-16867
Reported-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181203101045.27976-3-kraxel@redhat.com
Make utf16_to_str return an allocated string. Remove the assumtion that
the number of string bytes equals the number of utf16 chars (which is
only true for ascii chars). Instead call wcstombs twice, once to figure
the storage size and once for the actual conversion (as suggested by the
wcstombs manpage).
FIXME: surrogate pairs are not working correctly. Pre-existing bug,
fixing that is left for another day.
Reported-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 20181203101045.27976-2-kraxel@redhat.com
When using clang 3.4.2, compilation of QEMU fails like this:
CC aarch64-softmmu/hw/arm/aspeed.o
hw/arm/aspeed.c:36:3: error: redefinition of typedef 'AspeedBoardState' is a C11
feature [-Werror,-Wtypedef-redefinition]
} AspeedBoardState;
^
include/hw/arm/aspeed.h:14:33: note: previous definition is here
typedef struct AspeedBoardState AspeedBoardState;
^
1 error generated.
make[1]: *** [hw/arm/aspeed.o] Error 1
make: *** [subdir-aarch64-softmmu] Error 2
Remove the duplicated typedef to fix this issue.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 1543397736-8198-1-git-send-email-thuth@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Because they are supposed to remain const.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20181114132931.22624-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Under heavy IO (e.g. fio) the queue is not checked frequently enough for
pending commands. As a result some pending commands are timed out by the
linux sym53c8xx driver, which sends SCSI Abort messages for the timed out
commands. The SCSI Abort messages result in linux errors, which show up
on the console and in /var/log/messages.
e.g.
sd 0:0:3:0: [sdd] tag#33 ABORT operation started
scsi target0:0:3: control msgout:
80 20 47 d
sd 0:0:3:0: ABORT operation complete.
scsi target0:0:4: message d sent on bad reselection
Now following a WAIT DISCONNECT Script instruction, and if there is no
current command, check for a pending command on the queue and if one
exists call lsi_reselect().
Signed-off-by: George Kennedy <george.kennedy@oracle.com>
Message-Id: <1541776692-12271-1-git-send-email-george.kennedy@oracle.com>
[For safety, add a s->current check in lsi_update_irq - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: ZhiPeng Lu <luzhipeng@uniudc.com>
Message-id: 1543316565-1101590-1-git-send-email-luzhipeng@uniudc.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The code had asserted an interrupt every time it was requested to check
for new completion queue entries.This can result in spurious interrupts
seen by the guest OS.
Fix this by asserting an interrupt only if there are un-acknowledged
completion queue entries available.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
If no kernel driver is active, we can already claim and perform I/O on
it without detaching it.
Signed-off-by: linzhecheng <linzhecheng@huawei.com>
Message-id: 20181120083419.17716-1-linzhecheng@huawei.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Guest writes to a readonly register trigger the assert in
intel_hda_reg_write(). Add a check and just ignore them.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1628433
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181123063957.9515-1-kraxel@redhat.com
The cirrus bank0/1 offset should be updated before we update the vram's alias
offset.
Signed-off-by: Wang Xin <wangxinxin.wang@huawei.com>
Message-id: 20181123064646.23036-1-linzhecheng@huawei.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
A check for scan_enabled has been added to ps2_keyboard_event in commit
143c04c7e0 to prevent stream corruption.
This works well as long as operating system is resetting keyboard, or enabling it.
This fixes IBM 40p firmware, which doesn't bother sending KBD_CMD_RESET,
KBD_CMD_ENABLE or KBD_CMD_RESET_ENABLE before trying to use the keyboard.
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20181021190721.2148-1-hpoussin@reactos.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
When started in compat configuration of SynIC, e.g.
qemu-system-x86_64 -machine pc-i440fx-2.10,accel=kvm \
-cpu host,-vmx,hv-relaxed,hv_spinlocks=0x1fff,hv-vpindex,hv-synic
or explicitly
qemu-system-x86_64 -enable-kvm -cpu host,hv-synic,x-hv-synic-kvm-only=on
QEMU crashes in hyperv_synic_reset() trying to access the non-present
qobject for SynIC.
Add the missing check for NULL.
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reported-by: Igor Mammedov <imammedo@redhat.com>
Fixes: 9b4cf107b0
Fixes: 4a93722f9c
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20181126152836.25379-1-rkagan@virtuozzo.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Don't assert on RX descriptor settings when the receiver is
disabled. This fixes an issue with incoming packets on an
unused GEM.
Reported-by: mbilal <muhammad_bilal@mentor.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181123135450.24829-2-edgar.iglesias@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
When using the 9P2000.u version of the protocol, the following shell
command line in the guest can cause QEMU to crash:
while true; do rm -rf aa; mkdir -p a/b & touch a/b/c & mv a aa; done
With 9P2000.u, file renaming is handled by the WSTAT command. The
v9fs_wstat() function calls v9fs_complete_rename(), which calls
v9fs_fix_path() for every fid whose path is affected by the change.
The involved calls to v9fs_path_copy() may race with any other access
to the fid path performed by some worker thread, causing a crash like
shown below:
Thread 12 "qemu-system-x86" received signal SIGSEGV, Segmentation fault.
0x0000555555a25da2 in local_open_nofollow (fs_ctx=0x555557d958b8, path=0x0,
flags=65536, mode=0) at hw/9pfs/9p-local.c:59
59 while (*path && fd != -1) {
(gdb) bt
#0 0x0000555555a25da2 in local_open_nofollow (fs_ctx=0x555557d958b8,
path=0x0, flags=65536, mode=0) at hw/9pfs/9p-local.c:59
#1 0x0000555555a25e0c in local_opendir_nofollow (fs_ctx=0x555557d958b8,
path=0x0) at hw/9pfs/9p-local.c:92
#2 0x0000555555a261b8 in local_lstat (fs_ctx=0x555557d958b8,
fs_path=0x555556b56858, stbuf=0x7fff84830ef0) at hw/9pfs/9p-local.c:185
#3 0x0000555555a2b367 in v9fs_co_lstat (pdu=0x555557d97498,
path=0x555556b56858, stbuf=0x7fff84830ef0) at hw/9pfs/cofile.c:53
#4 0x0000555555a1e9e2 in v9fs_stat (opaque=0x555557d97498)
at hw/9pfs/9p.c:1083
#5 0x0000555555e060a2 in coroutine_trampoline (i0=-669165424, i1=32767)
at util/coroutine-ucontext.c:116
#6 0x00007fffef4f5600 in __start_context () at /lib64/libc.so.6
#7 0x0000000000000000 in ()
(gdb)
The fix is to take the path write lock when calling v9fs_complete_rename(),
like in v9fs_rename().
Impact: DoS triggered by unprivileged guest users.
Fixes: CVE-2018-19489
Cc: P J P <ppandit@redhat.com>
Reported-by: zhibin hu <noirfate@gmail.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Greg Kurz <groug@kaod.org>
When the submission and completion queues are being torn down
the IRQ will be asserted for the completion queue when the
submsission queue is deleted. Then when the completion queue
is deleted it stays asserted. Thus, on systems that do
not use MSI, no further interrupts can be triggered on the host.
Linux sees this as a long delay when unbinding the nvme device.
Eventually the interrupt timeout occurs and it continues.
To fix this we ensure we deassert the IRQ for a CQ when it is
deleted.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The CMB is marked as DEVICE_LITTLE_ENDIAN, so the data must be
read/written as if it was little-endian output (in the case of
big endian, we get two swaps, one in the memory core and one
in nvme.c).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Because the CMB BAR has a min_access_size of 2, if you read the last
byte it will try to memcpy *2* bytes from n->cmbuf, causing an off-by-one
error. This is CVE-2018-16847.
Another way to fix this might be to register the CMB as a RAM memory
region, which would also be more efficient. However, that might be a
change for big-endian machines; I didn't think this through and I don't
know how real hardware works. Add a basic testcase for the CMB in case
somebody does this change later on.
Cc: Keith Busch <keith.busch@intel.com>
Cc: qemu-block@nongnu.org
Reported-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Tested-by: Li Qiang <liq3ea@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When blk_flush called in NVMe reset path S/C queues are already freed
which means that re-entering AIO handling loop having some IO requests
unfinished will lockup or crash as their SG structures being potentially
reused. Call blk_drain before freeing the queues to avoid this nasty
scenario.
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Commit 40dce4ee6 "scsi-disk: fix rerror/werror=ignore" introduced a
bug which causes qemu to crash with the assertion error below if the
host file or disk returns an error:
qemu-system-x86_64: hw/scsi/scsi-bus.c:1374: scsi_req_complete:
Assertion `req->status == -1' failed.
Kevin Wolf suggested this fix:
< kwolf> Hm, should the final return false; in that patch
actually be a return true?
< kwolf> Because I think he didn't intend to change anything
except BLOCK_ERROR_ACTION_IGNORE
Buglink: https://bugs.launchpad.net/qemu/+bug/1804323
Fixes: 40dce4ee61
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Provide default RAM sizes for all XTFPGA boards, so that when started
without -m option they do the right thing.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
We have a couple of PC_COMPAT_3_0, so we should have 3.1 PC machines,
and update the 3.0 machines to make use of those.
Fixes a "Known issue" from https://wiki.qemu.org/Planning/3.1.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20181120132604.22854-1-marcandre.lureau@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Recent commit 5b76ef50f6 fixed a race where v9fs_co_open2() could
possibly overwrite a fid path with v9fs_path_copy() while it is being
accessed by some other thread, ie, use-after-free that can be detected
by ASAN with a custom 9p client.
It turns out that the same can happen at several locations where
v9fs_path_copy() is used to set the fid path. The fix is again to
take the write lock.
Fixes CVE-2018-19364.
Cc: P J P <ppandit@redhat.com>
Reported-by: zhibin hu <noirfate@gmail.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Greg Kurz <groug@kaod.org>
Update the onenand device to use qemu_log_mask() for reporting
guest errors and unimplemented features, rather than plain
fprintf() and hw_error().
(We leave the hw_error() in onenand_reset(), as that is
triggered by a failure to read the underlying block device
for the bootRAM, not by guest action.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181115143535.5885-3-peter.maydell@linaro.org
An off-by-one error in a switch case in onenand_read() allowed
a misbehaving guest to read off the end of a block of memory.
NB: the onenand device is used only by the "n800" and "n810"
machines, which are usable only with TCG, not KVM, so this is
not a security issue.
Reported-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20181115143535.5885-2-peter.maydell@linaro.org
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The UART and timer devices for the stm32f205 were being created
with memory regions that were too large. Use the size specified
in the chip datasheet.
The old sizes were so large that the devices would overlap with
each other in the SoC memory map, so this fixes a bug that
caused odd behavior and/or crashes when trying to set up multiple
UARTs.
Signed-off-by: Seth Kintigh <skintigh@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: rephrased commit message to follow our usual standard]
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Commit c8a35f1cf0 "fdc: use IsaDma interface instead of global DMA_*
functions" accidentally introduced a segfault in fdctrl_stop_transfer() for
non-DMA transfers.
If fdctrl->dma_chann has not been configured then the fdctrl->dma interface
reference isn't initialised during isabus_fdc_realize(). Unfortunately
fdctrl_stop_transfer() unconditionally references the DMA interface when
finishing the transfer causing a NULL pointer dereference.
Fix the issue by adding a check in fdctrl_stop_transfer() so that the DMA
interface reference and release method is only invoked if fdctrl->dma_chann
has been set.
(This issue was discovered by Martin testing a recent change in the NetBSD
installer under qemu-system-sparc)
Cc: qemu-stable@nongnu.org
Reported-by: Martin Husemann <martin@duskware.de>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Marc-André Lureau