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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-06-20 11:55:08 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-05 09:18:34 +0200 |
| commit | 68f4f658ef0a1d49b13de2ae991b13a93df675e6 (patch) | |
| tree | adfd0ae5781e9188ffbf180fc8374c8ed7d75d9a /tools/perf/scripts/python | |
| parent | 9ffc4d3233da61a674c6e6bff122346e7d7fa679 (diff) | |
usb: gadget: r8a66597: Fix a possible sleep-in-atomic-context bugs in r8a66597_queue()
[ Upstream commit f36b507c14c4b6e634463a610294e9cb0065c8ea ]
The driver may sleep in an interrupt handler.
The function call path (from bottom to top) in Linux-4.16.7 is:
[FUNC] r8a66597_queue(GFP_KERNEL)
drivers/usb/gadget/udc/r8a66597-udc.c, 1193:
r8a66597_queue in get_status
drivers/usb/gadget/udc/r8a66597-udc.c, 1301:
get_status in setup_packet
drivers/usb/gadget/udc/r8a66597-udc.c, 1381:
setup_packet in irq_control_stage
drivers/usb/gadget/udc/r8a66597-udc.c, 1508:
irq_control_stage in r8a66597_irq (interrupt handler)
To fix this bug, GFP_KERNEL is replaced with GFP_ATOMIC.
This bug is found by my static analysis tool (DSAC-2) and checked by
my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions