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author | Samuel CUELLA <samuel.cuella@supinfo.com> | 2009-03-10 20:56:00 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-10 23:55:12 +0100 |
commit | 16b71fdf97599f1b1b7f38418ee9922d9f117396 (patch) | |
tree | 86ceac6117f5a678aaa177bbcdf8d84d2559010c /include | |
parent | m68knommu: m528x build fix (diff) | |
download | linux-16b71fdf97599f1b1b7f38418ee9922d9f117396.tar.xz linux-16b71fdf97599f1b1b7f38418ee9922d9f117396.zip |
i810: fix kernel crash fix when struct fb_var_screeninfo is supplied
Prevent the kernel from being crashed by a divide-by-zero operation when
supplied an incorrectly filled 'struct fb_var_screeninfo' from userland.
Previously i810_main.c:1005 (i810_check_params) was using the global
'yres' symbol previously defined at i810_main.c:145 as a module parameter
value holder (i810_main.c:2174). If i810fb is compiled-in or if this
param doesn't get a default value, this direct usage leads to a
divide-by-zero at i810_main.c:1005 (i810_check_params). The patch simply
replace the 'yres' global, perhaps undefined symbol usage by a given
parameter structure lookup.
This problem occurs with directfb, mplayer -vo fbdev, SDL library.
It was also reported ( but non solved ) at:
http://mail.directfb.org/pipermail/directfb-dev/2008-March/004050.html
Signed-off-by: Samuel CUELLA <samuel.cuella@supinfo.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions