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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-09-01 07:44:09 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-25 15:54:08 +0100 |
| commit | af9f80fa1e5a5866bf511609c084434a14fd49af (patch) | |
| tree | 86a54f92137f09d4c5d14211ae5946163bc9f1f9 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | fce9612b5f495cc3051ead904c75157e37004071 (diff) | |
media: pci: ivtv: Fix a sleep-in-atomic-context bug in ivtv_yuv_init()
[ Upstream commit 8d11eb847de7d89c2754988c944d51a4f63e219b ]
The driver may sleep in a interrupt handler.
The function call paths (from bottom to top) in Linux-4.16 are:
[FUNC] kzalloc(GFP_KERNEL)
drivers/media/pci/ivtv/ivtv-yuv.c, 938:
kzalloc in ivtv_yuv_init
drivers/media/pci/ivtv/ivtv-yuv.c, 960:
ivtv_yuv_init in ivtv_yuv_next_free
drivers/media/pci/ivtv/ivtv-yuv.c, 1126:
ivtv_yuv_next_free in ivtv_yuv_setup_stream_frame
drivers/media/pci/ivtv/ivtv-irq.c, 827:
ivtv_yuv_setup_stream_frame in ivtv_irq_dec_data_req
drivers/media/pci/ivtv/ivtv-irq.c, 1013:
ivtv_irq_dec_data_req in ivtv_irq_handler
To fix this bug, GFP_KERNEL is replaced with GFP_ATOMIC.
This bug is found by my static analysis tool DSAC.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions