Yang Yingliang 8dddf2699d iio: trigger: sysfs: fix possible memory leak in iio_sysfs_trig_init() ... commit efa17e90e1 upstream. dev_set_name() allocates memory for name, it need be freed when device_add() fails, call put_device() to give up the reference that hold in device_initialize(), so that it can be freed in kobject_cleanup() when the refcount hit to 0. Fault injection test can trigger this: unreferenced object 0xffff8e8340a7b4c0 (size 32): comm "modprobe", pid 243, jiffies 4294678145 (age 48.845s) hex dump (first 32 bytes): 69 69 6f 5f 73 79 73 66 73 5f 74 72 69 67 67 65 iio_sysfs_trigge 72 00 a7 40 83 8e ff ff 00 86 13 c4 f6 ee ff ff r..@............ backtrace: [<0000000074999de8>] __kmem_cache_alloc_node+0x1e9/0x360 [<00000000497fd30b>] __kmalloc_node_track_caller+0x44/0x1a0 [<000000003636c520>] kstrdup+0x2d/0x60 [<0000000032f84da2>] kobject_set_name_vargs+0x1e/0x90 [<0000000092efe493>] dev_set_name+0x4e/0x70 Fixes: 1f785681a8 ("staging:iio:trigger sysfs userspace trigger rework.") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Cc: <Stable@vger.kernel.org> Link: https://lore.kernel.org/r/20221022074212.1386424-1-yangyingliang@huawei.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-11-25 17:45:51 +01:00
..
iio-trig-hrtimer.c
iio-trig-interrupt.c
iio-trig-loop.c
iio-trig-sysfs.c	iio: trigger: sysfs: fix possible memory leak in iio_sysfs_trig_init()	2022-11-25 17:45:51 +01:00
Kconfig
Makefile
stm32-lptimer-trigger.c
stm32-timer-trigger.c	iio: trigger: stm32-timer: fix MODULE_ALIAS	2021-12-14 11:32:44 +01:00