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f083de7ff8
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Ricardo Ribalda f083de7ff8 media: uvcvideo: Fix integer overflow calculating timestamp 
commit 8676a5e796 upstream.

The function uvc_video_clock_update() supports a single SOF overflow. Or
in other words, the maximum difference between the first ant the last
timestamp can be 4096 ticks or 4.096 seconds.

This results in a maximum value for y2 of: 0x12FBECA00, that overflows
32bits.
y2 = (u32)ktime_to_ns(ktime_sub(last->host_time, first->host_time)) + y1;

Extend the size of y2 to u64 to support all its values.

Without this patch:
 # yavta -s 1920x1080 -f YUYV -t 1/5 -c /dev/video0
Device /dev/v4l/by-id/usb-Shine-Optics_Integrated_Camera_0001-video-index0 opened.
Device `Integrated Camera: Integrated C' on `usb-0000:00:14.0-6' (driver 'uvcvideo') supports video, capture, without mplanes.
Video format set: YUYV (56595559) 1920x1080 (stride 3840) field none buffer size 4147200
Video format: YUYV (56595559) 1920x1080 (stride 3840) field none buffer size 4147200
Current frame rate: 1/5
Setting frame rate to: 1/5
Frame rate set: 1/5
8 buffers requested.
length: 4147200 offset: 0 timestamp type/source: mono/SoE
Buffer 0/0 mapped at address 0x7947ea94c000.
length: 4147200 offset: 4149248 timestamp type/source: mono/SoE
Buffer 1/0 mapped at address 0x7947ea557000.
length: 4147200 offset: 8298496 timestamp type/source: mono/SoE
Buffer 2/0 mapped at address 0x7947ea162000.
length: 4147200 offset: 12447744 timestamp type/source: mono/SoE
Buffer 3/0 mapped at address 0x7947e9d6d000.
length: 4147200 offset: 16596992 timestamp type/source: mono/SoE
Buffer 4/0 mapped at address 0x7947e9978000.
length: 4147200 offset: 20746240 timestamp type/source: mono/SoE
Buffer 5/0 mapped at address 0x7947e9583000.
length: 4147200 offset: 24895488 timestamp type/source: mono/SoE
Buffer 6/0 mapped at address 0x7947e918e000.
length: 4147200 offset: 29044736 timestamp type/source: mono/SoE
Buffer 7/0 mapped at address 0x7947e8d99000.
0 (0) [-] none 0 4147200 B 507.554210 508.874282 242.836 fps ts mono/SoE
1 (1) [-] none 2 4147200 B 508.886298 509.074289 0.751 fps ts mono/SoE
2 (2) [-] none 3 4147200 B 509.076362 509.274307 5.261 fps ts mono/SoE
3 (3) [-] none 4 4147200 B 509.276371 509.474336 5.000 fps ts mono/SoE
4 (4) [-] none 5 4147200 B 509.476394 509.674394 4.999 fps ts mono/SoE
5 (5) [-] none 6 4147200 B 509.676506 509.874345 4.997 fps ts mono/SoE
6 (6) [-] none 7 4147200 B 509.876430 510.074370 5.002 fps ts mono/SoE
7 (7) [-] none 8 4147200 B 510.076434 510.274365 5.000 fps ts mono/SoE
8 (0) [-] none 9 4147200 B 510.276421 510.474333 5.000 fps ts mono/SoE
9 (1) [-] none 10 4147200 B 510.476391 510.674429 5.001 fps ts mono/SoE
10 (2) [-] none 11 4147200 B 510.676434 510.874283 4.999 fps ts mono/SoE
11 (3) [-] none 12 4147200 B 510.886264 511.074349 4.766 fps ts mono/SoE
12 (4) [-] none 13 4147200 B 511.070577 511.274304 5.426 fps ts mono/SoE
13 (5) [-] none 14 4147200 B 511.286249 511.474301 4.637 fps ts mono/SoE
14 (6) [-] none 15 4147200 B 511.470542 511.674251 5.426 fps ts mono/SoE
15 (7) [-] none 16 4147200 B 511.672651 511.874337 4.948 fps ts mono/SoE
16 (0) [-] none 17 4147200 B 511.873988 512.074462 4.967 fps ts mono/SoE
17 (1) [-] none 18 4147200 B 512.075982 512.278296 4.951 fps ts mono/SoE
18 (2) [-] none 19 4147200 B 512.282631 512.482423 4.839 fps ts mono/SoE
19 (3) [-] none 20 4147200 B 518.986637 512.686333 0.149 fps ts mono/SoE
20 (4) [-] none 21 4147200 B 518.342709 512.886386 -1.553 fps ts mono/SoE
21 (5) [-] none 22 4147200 B 517.909812 513.090360 -2.310 fps ts mono/SoE
22 (6) [-] none 23 4147200 B 517.590775 513.294454 -3.134 fps ts mono/SoE
23 (7) [-] none 24 4147200 B 513.298465 513.494335 -0.233 fps ts mono/SoE
24 (0) [-] none 25 4147200 B 513.510273 513.698375 4.721 fps ts mono/SoE
25 (1) [-] none 26 4147200 B 513.698904 513.902327 5.301 fps ts mono/SoE
26 (2) [-] none 27 4147200 B 513.895971 514.102348 5.074 fps ts mono/SoE
27 (3) [-] none 28 4147200 B 514.099091 514.306337 4.923 fps ts mono/SoE
28 (4) [-] none 29 4147200 B 514.310348 514.510567 4.734 fps ts mono/SoE
29 (5) [-] none 30 4147200 B 514.509295 514.710367 5.026 fps ts mono/SoE
30 (6) [-] none 31 4147200 B 521.532513 514.914398 0.142 fps ts mono/SoE
31 (7) [-] none 32 4147200 B 520.885277 515.118385 -1.545 fps ts mono/SoE
32 (0) [-] none 33 4147200 B 520.411140 515.318336 -2.109 fps ts mono/SoE
33 (1) [-] none 34 4147200 B 515.325425 515.522278 -0.197 fps ts mono/SoE
34 (2) [-] none 35 4147200 B 515.538276 515.726423 4.698 fps ts mono/SoE
35 (3) [-] none 36 4147200 B 515.720767 515.930373 5.480 fps ts mono/SoE

Cc: stable@vger.kernel.org
Fixes: 66847ef013 ("[media] uvcvideo: Add UVC timestamps support")
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20240610-hwtimestamp-followup-v1-2-f9eaed7be7f0@chromium.org
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-03 09:00:40 +02:00
arch m68k: amiga: Turn off Warp1260 interrupts during boot 2024-08-03 09:00:36 +02:00
block block: check bio alignment in blk_mq_submit_bio 2024-08-03 09:00:37 +02:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto This push fixes a bug in the new ecc P521 code as well as a buggy 2024-05-20 08:47:54 -07:00
Documentation dt-bindings: thermal: correct thermal zone node name limit 2024-08-03 09:00:30 +02:00
drivers media: uvcvideo: Fix integer overflow calculating timestamp 2024-08-03 09:00:40 +02:00
fs jbd2: avoid infinite transaction commit loop 2024-08-03 09:00:40 +02:00
include jbd2: precompute number of transaction descriptor blocks 2024-08-03 09:00:40 +02:00
init gcc: disable '-Warray-bounds' for gcc-9 2024-06-15 10:43:04 -07:00
io_uring io_uring: don't allow netpolling with SETUP_IOPOLL 2024-08-03 09:00:37 +02:00
ipc Mainly singleton patches, documented in their respective changelogs. 2024-05-19 14:02:03 -07:00
kernel trace/pid_list: Change gfp flags in pid_list_fill_irq() 2024-08-03 09:00:37 +02:00
lib sbitmap: fix io hung due to race on sbitmap_word::cleared 2024-08-03 09:00:26 +02:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm/mglru: fix ineffective protection calculation 2024-08-03 09:00:29 +02:00
net wifi: mac80211: chanctx emulation set CHANGE_CHANNEL when in_reconfig 2024-08-03 09:00:32 +02:00
rust rust: avoid unused import warning in rusttest 2024-06-11 23:33:28 +02:00
samples tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
scripts x86/syscall: Mark exit[_group] syscall handlers __noreturn 2024-08-03 08:59:12 +02:00
security task_work: s/task_work_cancel()/task_work_cancel_func()/ 2024-08-03 09:00:36 +02:00
sound ASoC: amd: Adjust error handling in case of absent codec device 2024-08-03 09:00:14 +02:00
tools selftests/nolibc: fix printf format mismatch in expect_str_buf_eq() 2024-08-03 09:00:33 +02:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt KVM fixes for 6.10 2024-06-21 08:03:55 -04:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap MAINTAINERS: mailmap: update Lorenzo Stoakes's email address 2024-07-06 11:39:51 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS pci-v6.10-fixes-2 2024-07-05 12:33:00 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Fixes for the I2C testunit, the Renesas R-Car driver and some 2024-07-13 16:34:22 -07:00
Makefile Linux 6.10.2 2024-07-27 11:40:36 +02:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.