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| author | lu zhipeng <luzhipeng@cestc.cn> | 2022-09-29 20:23:52 +0800 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2022-10-12 11:00:55 +0200 |
| commit | 2fba4e9c4938406fa676bfd3566e416e095cf93a (patch) | |
| tree | 61d5a710a3c0e72034e970d475229e1dc680b94c /hw/display/cirrus_vga.c | |
| parent | 604a86895feb6639417fe957dfc95191f7f63565 (diff) | |
| download | qemu-2fba4e9c4938406fa676bfd3566e416e095cf93a.zip qemu-2fba4e9c4938406fa676bfd3566e416e095cf93a.tar.gz qemu-2fba4e9c4938406fa676bfd3566e416e095cf93a.tar.bz2 | |
cirrus_vga: fix potential memory overflow
Signed-off-by: lu zhipeng <luzhipeng@cestc.cn>
Message-Id: <20220929122352.1891-1-luzhipeng@cestc.cn>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/display/cirrus_vga.c')
| -rw-r--r-- | hw/display/cirrus_vga.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c index 3bb6a58..2577005 100644 --- a/hw/display/cirrus_vga.c +++ b/hw/display/cirrus_vga.c @@ -834,7 +834,7 @@ static void cirrus_bitblt_cputovideo_next(CirrusVGAState * s) word alignment, so we keep them for the next line */ /* XXX: keep alignment to speed up transfer */ end_ptr = s->cirrus_bltbuf + s->cirrus_blt_srcpitch; - copy_count = s->cirrus_srcptr_end - end_ptr; + copy_count = MIN(s->cirrus_srcptr_end - end_ptr, CIRRUS_BLTBUFSIZE); memmove(s->cirrus_bltbuf, end_ptr, copy_count); s->cirrus_srcptr = s->cirrus_bltbuf + copy_count; s->cirrus_srcptr_end = s->cirrus_bltbuf + s->cirrus_blt_srcpitch; |