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fbmem: Convert from atomic_t to refcount_t on fb_info->count
authorXiyu Yang <xiyuyang19@fudan.edu.cn>
Mon, 19 Jul 2021 05:59:45 +0000 (13:59 +0800)
committerSam Ravnborg <sam@ravnborg.org>
Mon, 19 Jul 2021 20:16:35 +0000 (22:16 +0200)
commit0189cb57b96ff92f75e3680b3710a46dacd6509f
treebb892fadc63bdafc3f10444a2faa97b9b40a354etree | snapshot
parent98a65439172dc69cb16834e62e852afc2adb83edcommit | diff
fbmem: Convert from atomic_t to refcount_t on fb_info->count

refcount_t type and corresponding API can protect refcounters from
accidental underflow and overflow and further use-after-free situations.

Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1626674392-55857-1-git-send-email-xiyuyang19@fudan.edu.cn
drivers/video/fbdev/core/fbmem.c diff | blob | history
include/linux/fb.h diff | blob | history
Linux Kernel Source Tree.