diff options
author | Yizhuo Zhai <[email protected]> | 2022-02-02 15:58:08 -0800 |
---|---|---|
committer | Daniel Vetter <[email protected]> | 2022-02-03 13:52:03 +0100 |
commit | 68e8cc2a23b61862bf20ffc9b782a3fb49c65568 (patch) | |
tree | 763ffd34b281e100ed6f19df7f495956e7d472d6 /net/lapb/lapb_subr.c | |
parent | 622c9a3a7868e1eeca39c55305ca3ebec4742b64 (diff) |
fbdev: fbmem: Fix the implicit type casting
In function do_fb_ioctl(), the "arg" is the type of unsigned long,
and in "case FBIOBLANK:" this argument is casted into an int before
passig to fb_blank(). In fb_blank(), the comparision
if (blank > FB_BLANK_POWERDOWN) would be bypass if the original
"arg" is a large number, which is possible because it comes from
the user input. Fix this by adding the check before the function
call.
Reviewed-by: Guenter Roeck <[email protected]>
Reviewed-by: Sam Ravnborg <[email protected]>
Acked-by: Helge Deller <[email protected]>
Signed-off-by: Yizhuo Zhai <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions