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authorPaul Mundt <lethal@linux-sh.org>2007-03-05 00:30:31 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-05 07:57:51 -0800
commit1f2b69f9bdce8461341e5fb864568a2ee90079c8 (patch)
treecb773297c5e40f0e6ac3b183380140c41700521c /mm
parent69f7c0a1be84b10a81b6edcce2dbee0cdec26eba (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