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| author | Kees Cook <keescook@chromium.org> | 2013-08-28 22:31:52 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-09-04 12:03:27 +0200 |
| commit | 1e87a2456b0227ca4ab881e19a11bb99d164e792 (patch) | |
| tree | ecd0c6e1e42cfd620b7767a807471632a75c95cb | |
| parent | 9e8910257397372633e74b333ef891f20c800ee4 (diff) | |
| download | linux-stable-1e87a2456b0227ca4ab881e19a11bb99d164e792.tar.gz linux-stable-1e87a2456b0227ca4ab881e19a11bb99d164e792.tar.bz2 linux-stable-1e87a2456b0227ca4ab881e19a11bb99d164e792.zip | |
HID: picolcd_core: validate output report details
A HID device could send a malicious output report that would cause the
picolcd HID driver to trigger a NULL dereference during attr file writing.
[jkosina@suse.cz: changed
report->maxfield < 1
to
report->maxfield != 1
as suggested by Bruno].
CVE-2013-2899
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Reviewed-by: Bruno Prémont <bonbons@linux-vserver.org>
Acked-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/hid-picolcd_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c index b48092d0e139..acbb021065ec 100644 --- a/drivers/hid/hid-picolcd_core.c +++ b/drivers/hid/hid-picolcd_core.c @@ -290,7 +290,7 @@ static ssize_t picolcd_operation_mode_store(struct device *dev, buf += 10; cnt -= 10; } - if (!report) + if (!report || report->maxfield != 1) return -EINVAL; while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r')) |