qemu/hw/sparc
Thomas Huth 0f0f8b611e loader: Check access size when calling rom_ptr() to avoid crashes
The rom_ptr() function allows direct access to the ROM blobs that we
load during startup. However, there are currently no checks for the
size of the accesses, so it's currently possible to crash QEMU for
example with:

$ echo "Insane in the mainframe" > /tmp/test.txt
$ s390x-softmmu/qemu-system-s390x -kernel /tmp/test.txt -append xyz
Segmentation fault (core dumped)
$ s390x-softmmu/qemu-system-s390x -kernel /tmp/test.txt -initrd /tmp/test.txt
Segmentation fault (core dumped)
$ echo -n HdrS > /tmp/hdr.txt
$ sparc64-softmmu/qemu-system-sparc64 -kernel /tmp/hdr.txt -initrd /tmp/hdr.txt
Segmentation fault (core dumped)

We need a possibility to check the size of the ROM area that we want
to access, thus let's add a size parameter to the rom_ptr() function
to avoid these problems.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1530005740-25254-1-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00
..
leon3.c Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
Makefile.objs sun4m: move sun4m_iommu.c from hw/dma to hw/sparc 2018-01-09 21:48:19 +00:00
sun4m_iommu.c iommu: Add IOMMU index argument to translate method 2018-06-15 15:23:34 +01:00
sun4m.c loader: Check access size when calling rom_ptr() to avoid crashes 2018-07-02 10:37:38 +02:00
trace-events sun4m: move sun4m_iommu.c from hw/dma to hw/sparc 2018-01-09 21:48:19 +00:00