diff options
| author | Haotian Zhang <vulab@iscas.ac.cn> | 2025-11-26 16:06:25 +0800 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2025-12-08 22:54:17 +0100 |
| commit | d1220e47e4bd2be8b84bc158f4dea44f2f88b226 (patch) | |
| tree | f57cca51073409885958cf9591b06db6a813324b /drivers/rtc | |
| parent | 22a6db42253744f0f54ab632da0140b690feb44d (diff) | |
rtc: gamecube: Check the return value of ioremap()
The function ioremap() in gamecube_rtc_read_offset_from_sram() can fail
and return NULL, which is dereferenced without checking, leading to a
NULL pointer dereference.
Add a check for the return value of ioremap() and return -ENOMEM on
failure.
Fixes: 86559400b3ef ("rtc: gamecube: Add a RTC driver for the GameCube, Wii and Wii U")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Reviewed-by: Link Mauve <kernel@linkmauve.fr>
Link: https://patch.msgid.link/20251126080625.1752-1-vulab@iscas.ac.cn
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-gamecube.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-gamecube.c b/drivers/rtc/rtc-gamecube.c index c828bc8e05b9..045d5d45ab4b 100644 --- a/drivers/rtc/rtc-gamecube.c +++ b/drivers/rtc/rtc-gamecube.c @@ -242,6 +242,10 @@ static int gamecube_rtc_read_offset_from_sram(struct priv *d) } hw_srnprot = ioremap(res.start, resource_size(&res)); + if (!hw_srnprot) { + pr_err("failed to ioremap hw_srnprot\n"); + return -ENOMEM; + } old = ioread32be(hw_srnprot); /* TODO: figure out why we use this magic constant. I obtained it by |