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| author | Jianglei Nie <niejianglei2021@163.com> | 2022-11-29 09:15:42 +0100 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2022-12-12 12:21:41 +0100 |
| commit | ddf75a86aba2cfb7ec4497e8692b60c8c8fe0ee7 (patch) | |
| tree | 164d5a8a0ec6794500aded2980726617a585ca0a /drivers/auxdisplay/hd44780.c | |
| parent | Linux 6.1 (diff) | |
| download | linux-ddf75a86aba2cfb7ec4497e8692b60c8c8fe0ee7.tar.xz linux-ddf75a86aba2cfb7ec4497e8692b60c8c8fe0ee7.zip | |
auxdisplay: hd44780: Fix potential memory leak in hd44780_remove()
hd44780_probe() allocates a memory chunk for hd with kzalloc() and
makes "lcd->drvdata->hd44780" point to it. When we call hd44780_remove(),
we should release all relevant memory and resource. But "lcd->drvdata
->hd44780" is not released, which will lead to a memory leak.
We should release the "lcd->drvdata->hd44780" in hd44780_remove() to fix
the memory leak bug.
Fixes: 718e05ed92ec ("auxdisplay: Introduce hd44780_common.[ch]")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'drivers/auxdisplay/hd44780.c')
| -rw-r--r-- | drivers/auxdisplay/hd44780.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c index 8b2a0eb3f32a..d56a5d508ccd 100644 --- a/drivers/auxdisplay/hd44780.c +++ b/drivers/auxdisplay/hd44780.c @@ -322,8 +322,10 @@ fail1: static int hd44780_remove(struct platform_device *pdev) { struct charlcd *lcd = platform_get_drvdata(pdev); + struct hd44780_common *hdc = lcd->drvdata; charlcd_unregister(lcd); + kfree(hdc->hd44780); kfree(lcd->drvdata); kfree(lcd); |