diff options
| author | Shuah Khan (Samsung OSG) <shuah@kernel.org> | 2018-10-18 10:19:29 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-18 19:44:39 +0200 |
| commit | e28fd56ad5273be67d0fae5bedc7e1680e729952 (patch) | |
| tree | 76d02d9e61603277f2ef1ac3d421f1b1166b0fa3 /kernel/dma.c | |
| parent | e325808c0051b16729ffd472ff887c6cae5c6317 (diff) | |
usbip:vudc: BUG kmalloc-2048 (Not tainted): Poison overwritten
In rmmod path, usbip_vudc does platform_device_put() twice once from
platform_device_unregister() and then from put_vudc_device().
The second put results in:
BUG kmalloc-2048 (Not tainted): Poison overwritten error or
BUG: KASAN: use-after-free in kobject_put+0x1e/0x230 if KASAN is
enabled.
[ 169.042156] calling init+0x0/0x1000 [usbip_vudc] @ 1697
[ 169.042396] =============================================================================
[ 169.043678] probe of usbip-vudc.0 returned 1 after 350 usecs
[ 169.044508] BUG kmalloc-2048 (Not tainted): Poison overwritten
[ 169.044509] -----------------------------------------------------------------------------
...
[ 169.057849] INFO: Freed in device_release+0x2b/0x80 age=4223 cpu=3 pid=1693
[ 169.057852] kobject_put+0x86/0x1b0
[ 169.057853] 0xffffffffc0c30a96
[ 169.057855] __x64_sys_delete_module+0x157/0x240
Fix it to call platform_device_del() instead and let put_vudc_device() do
the platform_device_put().
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/dma.c')
0 files changed, 0 insertions, 0 deletions