syzbot


UBSAN: shift-out-of-bounds in set_flicker

Status: fixed on 2023/12/21 03:45
Subsystems: usb media
[Documentation on labels]
Reported-by: syzbot+e27f3dbdab04e43b9f73@syzkaller.appspotmail.com
Fix commit: 099be1822d1f media: gspca: cpia1: shift-out-of-bounds in set_flicker
First crash: 289d, last: 205d
Discussions (17)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 4.14 1/4] media: gspca: cpia1: shift-out-of-bounds in set_flicker 1 (1) 2023/11/12 13:29
[PATCH AUTOSEL 4.19 1/5] media: gspca: cpia1: shift-out-of-bounds in set_flicker 1 (1) 2023/11/12 13:29
[PATCH AUTOSEL 5.4 1/6] media: gspca: cpia1: shift-out-of-bounds in set_flicker 1 (1) 2023/11/12 13:28
[PATCH AUTOSEL 5.10 1/8] media: gspca: cpia1: shift-out-of-bounds in set_flicker 2 (2) 2023/11/12 13:28
[PATCH AUTOSEL 5.15 1/9] media: gspca: cpia1: shift-out-of-bounds in set_flicker 2 (2) 2023/11/12 13:28
[PATCH AUTOSEL 6.1 1/9] media: gspca: cpia1: shift-out-of-bounds in set_flicker 2 (2) 2023/11/12 13:28
[PATCH AUTOSEL 6.5 01/10] media: gspca: cpia1: shift-out-of-bounds in set_flicker 2 (2) 2023/11/12 13:27
[PATCH AUTOSEL 6.6 01/11] media: gspca: cpia1: shift-out-of-bounds in set_flicker 3 (3) 2023/11/12 13:27
Re: [PATCH v5] media: gspca: cpia1: shift-out-of-bounds in set_flicker 1 (1) 2023/09/04 07:23
[PATCH v5] media: gspca: cpia1: shift-out-of-bounds in set_flicker 1 (1) 2023/08/30 07:44
[PATCH v5] media: gspca: cpia1: shift-out-of-bounds in set_flicker 1 (1) 2023/08/27 18:53
[PATCH v4] media: gspca: UBSAN: shift-out-of-bounds in set_flicker 1 (1) 2023/08/25 13:04
[PATCH v3] media: gspca: UBSAN: shift-out-of-bounds in set_flicker 2 (2) 2023/08/24 11:46
[PATCH v2] UBSAN: shift-out-of-bounds in set_flicker 3 (3) 2023/08/24 07:19
[PATCH v2] UBSAN: shift-out-of-bounds in set_flicker 1 (1) 2023/08/21 08:15
[PATCH] UBSAN: shift-out-of-bounds in set_flicker 2 (2) 2023/08/19 10:27
[syzbot] [media?] [usb?] UBSAN: shift-out-of-bounds in set_flicker 0 (1) 2023/08/17 16:57
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 UBSAN: shift-out-of-bounds in set_flicker origin:lts-only syz unreliable 1 185d 185d 0/3 upstream: reported syz repro on 2023/11/26 06:40
Last patch testing requests (5)
Created Duration User Patch Repo Result
2023/08/28 10:32 13m retest repro https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing report log
2023/08/27 17:10 24m coolrrsh@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing OK log
2023/08/27 16:15 14m coolrrsh@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing report log
2023/08/18 17:47 33m coolrrsh@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing OK log
2023/08/18 14:07 33m coolrrsh@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing OK log

Sample crash report:
gspca_cpia1: usb_control_msg 05, error -71
gspca_cpia1: usb_control_msg 03, error -71
================================================================================
UBSAN: shift-out-of-bounds in drivers/media/usb/gspca/cpia1.c:1031:27
shift exponent 245 is too large for 32-bit type 'int'
CPU: 1 PID: 5199 Comm: kworker/1:11 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x27a/0x600 lib/ubsan.c:387
 set_flicker.cold+0x1b/0x20 drivers/media/usb/gspca/cpia1.c:1031
 sd_s_ctrl+0x2c6/0xbf0 drivers/media/usb/gspca/cpia1.c:1782
 __v4l2_ctrl_handler_setup+0x511/0x710 drivers/media/v4l2-core/v4l2-ctrls-core.c:2481
 v4l2_ctrl_handler_setup drivers/media/v4l2-core/v4l2-ctrls-core.c:2498 [inline]
 v4l2_ctrl_handler_setup+0x50/0xa0 drivers/media/v4l2-core/v4l2-ctrls-core.c:2490
 gspca_set_default_mode drivers/media/usb/gspca/gspca.c:908 [inline]
 gspca_dev_probe2+0xdd6/0x1b20 drivers/media/usb/gspca/gspca.c:1541
 gspca_dev_probe+0x18b/0x270 drivers/media/usb/gspca/gspca.c:1610
 usb_probe_interface+0x307/0x930 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958
 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x117e/0x1aa0 drivers/base/core.c:3625
 usb_set_configuration+0x10cb/0x1c40 drivers/usb/core/message.c:2207
 usb_generic_driver_probe+0xca/0x130 drivers/usb/core/generic.c:238
 usb_probe_device+0xda/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958
 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x117e/0x1aa0 drivers/base/core.c:3625
 usb_new_device+0xd80/0x19f0 drivers/usb/core/hub.c:2599
 hub_port_connect drivers/usb/core/hub.c:5463 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2dac/0x4e10 drivers/usb/core/hub.c:5845
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
================================================================================

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/05 22:41 upstream 1c41041124bd 500bfdc4 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in set_flicker
2023/11/04 09:06 upstream 8f6f76a6a29f 500bfdc4 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root UBSAN: shift-out-of-bounds in set_flicker
2023/08/28 12:00 upstream 2dde18cd1d8f 03d9c195 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce UBSAN: shift-out-of-bounds in set_flicker
2023/09/23 16:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe4469582053 0b6a67ac .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 UBSAN: shift-out-of-bounds in set_flicker
2023/08/13 16:49 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 55c3e571d2a0 39990d51 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-usb UBSAN: shift-out-of-bounds in set_flicker
* Struck through repros no longer work on HEAD.