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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-03-23 17:36:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-23 16:53:29 +0100 |
| commit | fbdbbe6d3ee502b3bdeb4f255196bb45003614be (patch) | |
| tree | 7de7a85aa28fde01ffd53912183fbb761c2c0dd8 /drivers/usb/cdns3/cdns3-imx.c | |
| parent | 91356fed6afd1c83bf0d3df1fc336d54e38f0458 (diff) | |
usb: gadget: pch_udc: Check if driver is present before calling ->setup()
Since we have a separate routine for VBUS sense, the interrupt may occur
before gadget driver is present. Hence, ->setup() call may oops the kernel:
[ 55.245843] BUG: kernel NULL pointer dereference, address: 00000010
...
[ 55.245843] EIP: pch_udc_isr.cold+0x162/0x33f
...
[ 55.245843] <IRQ>
[ 55.245843] ? pch_udc_svc_data_out+0x160/0x160
Check if driver is present before calling ->setup().
Fixes: f646cf94520e ("USB device driver of Topcliff PCH")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210323153626.54908-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
0 files changed, 0 insertions, 0 deletions