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| author | Yang Yingliang <yangyingliang@huawei.com> | 2021-10-13 17:42:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:07 +0300 |
| commit | c32c68ac7ba1d480e21501ea50e659b0ad310e82 (patch) | |
| tree | 63acafd5191d9105718739a184a1b3583471e606 /drivers/iio | |
| parent | 289884de9ff62d193ac8874c50d1a8986be633a3 (diff) | |
| download | linux-c32c68ac7ba1d480e21501ea50e659b0ad310e82.tar.xz | |
iio: buffer: Fix memory leak in iio_buffer_register_legacy_sysfs_groups()
commit 604faf9a2ecd1addcc0c10a47e5aaef3c4d4fd6b upstream.
If the second iio_device_register_sysfs_group() fails,
'legacy_buffer_group.attrs' need be freed too or it will
cause memory leak:
unreferenced object 0xffff888003618280 (size 64):
comm "xrun", pid 357, jiffies 4294907259 (age 22.296s)
hex dump (first 32 bytes):
80 f6 8c 03 80 88 ff ff 80 fb 8c 03 80 88 ff ff ................
00 f9 8c 03 80 88 ff ff 80 fc 8c 03 80 88 ff ff ................
backtrace:
[<00000000076bfd43>] __kmalloc+0x1a3/0x2f0
[<00000000c32e4886>] iio_buffers_alloc_sysfs_and_mask+0xc31/0x1290 [industrialio]
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: d9a625744ed0 ("iio: core: merge buffer/ & scan_elements/ attributes")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20211013144242.1685060-1-yangyingliang@huawei.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index f6e914dd171b..7f4e3ceaafec 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -1367,10 +1367,10 @@ static int iio_buffer_register_legacy_sysfs_groups(struct iio_dev *indio_dev, return 0; -error_free_buffer_attrs: - kfree(iio_dev_opaque->legacy_buffer_group.attrs); error_free_scan_el_attrs: kfree(iio_dev_opaque->legacy_scan_el_group.attrs); +error_free_buffer_attrs: + kfree(iio_dev_opaque->legacy_buffer_group.attrs); return ret; } |