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da53c36ddd
linux/include/media
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Hans Verkuil da53c36ddd media: cec: core: add adap_nb_transmit_canceled() callback 
A potential deadlock was found by Zheng Zhang with a local syzkaller
instance.

The problem is that when a non-blocking CEC transmit is canceled by calling
cec_data_cancel, that in turn can call the high-level received() driver
callback, which can call cec_transmit_msg() to transmit a new message.

The cec_data_cancel() function is called with the adap->lock mutex held,
and cec_transmit_msg() tries to take that same lock.

The root cause is that the received() callback can either be used to pass
on a received message (and then adap->lock is not held), or to report a
canceled transmit (and then adap->lock is held).

This is confusing, so create a new low-level adap_nb_transmit_canceled
callback that reports back that a non-blocking transmit was canceled.

And the received() callback is only called when a message is received,
as was the case before commit f9d0ecbf56 ("media: cec: correctly pass
on reply results") complicated matters.

Reported-by: Zheng Zhang <zheng.zhang@email.ucr.edu>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: f9d0ecbf56 ("media: cec: correctly pass on reply results")
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-08-10 07:58:32 +02:00
..
davinci media: v4l: async: Rename v4l2_async_subdev as v4l2_async_connection 2023-07-28 10:44:25 +02:00
drv-intf media: saa7146: convert to vb2 2023-04-15 08:53:31 +01:00
i2c media: i2c: add DS90UB960 driver 2023-07-14 13:18:56 +02:00
tpg media: v4l2-tpg: add HDMI Video Guard Band test pattern 2022-06-20 10:30:30 +01:00
cec-notifier.h Update rmk's email address in various drivers 2020-04-21 17:50:09 +01:00
cec-pin.h media: cec-gpio: handle gpiod_get_value errors correctly 2020-04-29 12:04:38 +02:00
cec.h media: cec: core: add adap_nb_transmit_canceled() callback 2023-08-10 07:58:32 +02:00
demux.h media: dvb: update buffer mmaped flags and frame counter 2018-02-23 11:44:08 -05:00
dmxdev.h media: dmxdev: drop unneeded <linux/kernel.h> inclusion from other headers 2021-12-14 16:19:04 +01:00
dvb_ca_en50221.h media: move dvb kAPI headers to include/media 2017-12-28 13:16:01 -05:00
dvb_demux.h media: dvb: update buffer mmaped flags and frame counter 2018-02-23 11:44:08 -05:00
dvb_frontend.h Revert "media: dvb-core: Fix use-after-free on race condition at dvb_frontend" 2023-06-14 23:16:29 +01:00
dvb_math.h media: move dvb kAPI headers to include/media 2017-12-28 13:16:01 -05:00
dvb_net.h media: dvb-core: Fix use-after-free due on race condition at dvb_net 2023-05-14 06:30:45 +01:00
dvb_ringbuffer.h media: dvb_ringbuffer: Fix typo in dvb_ringbuffer_pkt_write() kerneldoc 2022-11-25 09:45:47 +00:00
dvb_vb2.h media: dvb: update buffer mmaped flags and frame counter 2018-02-23 11:44:08 -05:00
dvb-usb-ids.h media: dvb-usb: dib0700_devices: use an enum for the device number 2022-04-18 07:36:44 +02:00
dvbdev.h media: dvbdev.h: do some kernel-doc cleanups 2023-05-14 16:05:27 +01:00
frame_vector.h media: videobuf2: revert "get_userptr: buffers are always writable" 2022-12-06 07:14:31 +00:00
imx.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
jpeg.h media: Add common header file with JPEG marker definitions 2023-05-25 16:21:21 +02:00
media-dev-allocator.h media: Fix Media Controller API config checks 2021-06-24 14:26:00 +02:00
media-device.h media: mc-device: remove unnecessary __must_check 2023-04-11 18:54:01 +02:00
media-devnode.h media: media-devnode.h: drop duplicated word in comment 2020-07-19 14:00:12 +02:00
media-entity.h media: mc: Make media_get_pad_index() use pad type flag 2023-05-25 16:21:22 +02:00
media-request.h media: media requests: return EBADR instead of EACCES 2019-03-25 13:26:10 -04:00
mipi-csi2.h media: Add MIPI CSI-2 28 bits per pixel raw data type 2022-05-17 09:17:26 +02:00
ov_16bit_addr_reg_helpers.h media: core: add ov_16bit_addr_reg_helpers.h 2023-02-08 08:23:50 +01:00
rc-core.h media: rc-core: rename ir_raw_event_reset to ir_raw_event_overflow 2022-01-28 19:32:50 +01:00
rc-map.h media: rc: add Beelink Mini MXIII keymap 2023-03-19 22:21:54 +01:00
rcar-fcp.h media: rcar-fcp: convert to SPDX identifiers 2018-09-12 09:29:03 -04:00
tuner-types.h media: tuner-types: add kernel-doc markups for struct tunertype 2017-12-18 09:06:40 -05:00
tuner.h Linux 5.15-rc4 2021-10-04 07:52:13 +02:00
tveeprom.h media: drop unnecessary networking includes 2023-03-19 22:50:06 +01:00
v4l2-async.h media: v4l: async: Set v4l2_device and subdev in async notifier init 2023-08-10 07:58:32 +02:00
v4l2-common.h media: v4l2-common: Add support for fractional bpp 2023-06-09 16:14:17 +01:00
v4l2-ctrls.h media: Add AV1 uAPI 2023-06-09 16:13:01 +01:00
v4l2-dev.h media: mc: convert pipeline funcs to take media_pad 2022-09-24 09:22:30 +02:00
v4l2-device.h media: fix kernel-doc markups 2020-11-16 10:31:16 +01:00
v4l2-dv-timings.h media: fix kernel-doc markups 2020-11-16 10:31:16 +01:00
v4l2-event.h media: v4l2-dev/event: add v4l2_event_wake_all() 2021-01-04 13:14:25 +01:00
v4l2-fh.h media: v4l2-fh: define v4l2_fh struct regardless of condition 2020-04-21 13:40:06 +02:00
v4l2-flash-led-class.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
v4l2-fwnode.h media: v4l: fwnode: Remove unneeded forward declaration 2023-07-28 10:34:26 +02:00
v4l2-h264.h media: h264: Sort p/b reflist using frame_num 2022-05-17 10:02:29 +02:00
v4l2-image-sizes.h media: v4l2-image-sizes: add HD and Full-HD definitions 2020-04-21 17:21:51 +02:00
v4l2-ioctl.h media: v4l2: prepare compat-ioctl rework 2020-11-16 10:31:05 +01:00
v4l2-jpeg.h media: Add parsing for APP14 data segment in jpeg helpers 2021-03-22 10:35:36 +01:00
v4l2-mc.h media: Accept non-subdev sinks in v4l2_create_fwnode_links_to_pad() 2023-04-11 18:54:01 +02:00
v4l2-mediabus.h media: v4l2-mediabus: add support for dual edge sampling 2022-12-07 17:58:46 +01:00
v4l2-mem2mem.h media: v4l2-mem2mem: add lock to protect parameter num_rdy 2023-05-25 16:21:20 +02:00
v4l2-rect.h media: v4l2-rect.h: add enclosed rectangle helper 2020-07-04 12:29:38 +02:00
v4l2-subdev.h media: v4l: async: Support fwnode endpoint list matching for subdevs 2023-07-28 10:53:41 +02:00
v4l2-vp9.h media: Add VP9 v4l2 library 2021-11-22 07:47:13 +00:00
videobuf2-core.h media: vb2: add (un)prepare_streaming queue ops 2022-11-25 07:39:46 +00:00
videobuf2-dma-contig.h media: videobuf2-dma-contig: fix bad kfree in vb2_dma_contig_clear_max_seg_size 2020-06-11 19:20:55 +02:00
videobuf2-dma-sg.h media: Change Andrzej Pietrasiewicz's e-mail address 2019-01-16 11:21:07 -05:00
videobuf2-dvb.h media: vb2: videobuf -> videobuf2 2022-08-29 15:38:09 +02:00
videobuf2-memops.h media: videobuf2: revert "get_userptr: buffers are always writable" 2022-12-06 07:14:31 +00:00
videobuf2-v4l2.h media: videobuf2: Remove vb2_find_timestamp() 2022-08-30 14:44:45 +02:00
videobuf2-vmalloc.h
videobuf-core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 237 2019-06-19 17:09:07 +02:00
videobuf-dma-contig.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 237 2019-06-19 17:09:07 +02:00
videobuf-dma-sg.h media: videobuf-dma-sg: number of pages should be unsigned long 2020-09-03 11:12:20 +02:00
videobuf-vmalloc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 237 2019-06-19 17:09:07 +02:00
vsp1.h media: vsp1: Add premultiplied alpha support 2022-09-07 23:48:39 +03:00