diff options
author | Paul Mundt <lethal@linux-sh.org> | 2007-03-05 00:30:31 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-05 07:57:51 -0800 |
commit | 1f2b69f9bdce8461341e5fb864568a2ee90079c8 (patch) | |
tree | cb773297c5e40f0e6ac3b183380140c41700521c /mm | |
parent | 69f7c0a1be84b10a81b6edcce2dbee0cdec26eba (diff) |
[PATCH] fb: sm501fb off-by-1 sysfs store
Currently sm501fb_crtsrc_store() won't allow the routing to be changed via
echos from userspace in to the sysfs file. The reason for this is that the
strnicmp() for both heads uses a sizeof() for the string length, which ends
up being strlen() + 1 (\0 in the normal case, but the echo gives a newline,
which is where the issue occurs), this then causes a mismatch and
subsequently bails with the -EINVAL.
In addition to this, the hardcoded lengths were then used for the store
length that was returned, which ended up being erroneous and resulting in a
write error. There's also no point in returning anything but the full
length since it will -EINVAL out on a mismatch well before then anyways.
sizeof("string") is great for making sure you have space in your buffer,
but rather less so for string comparisons :-)
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions