Hello, syzbot found the following issue on: HEAD commit: 55c3e571d2a0 USB: gadget: f_mass_storage: Fix unused varia.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=13eead53a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=f7789f2bd4d1e7af dashboard link: https://syzkaller.appspot.com/bug?extid=e27f3dbdab04e43b9f73 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15dfaeada80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5ac7d16ee63e/disk-55c3e571.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ea99a7a9832f/vmlinux-55c3e571.xz kernel image: https://storage.googleapis.com/syzbot-assets/6848258d554d/bzImage-55c3e571.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e27f3dbdab04e43b9f73@xxxxxxxxxxxxxxxxxxxxxxxxx gspca_cpia1: usb_control_msg 03, error -32 gspca_cpia1: usb_control_msg a1, error -32 gspca_cpia1: usb_control_msg a1, error -32 gspca_cpia1: usb_control_msg a1, error -32 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: 25 Comm: kworker/1:1 Not tainted 6.5.0-rc4-syzkaller-00118-g55c3e571d2a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:798 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:828 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:956 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x11f1/0x1b40 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:798 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:828 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:956 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x11f1/0x1b40 drivers/base/core.c:3625 usb_new_device+0xd80/0x1960 drivers/usb/core/hub.c:2589 hub_port_connect drivers/usb/core/hub.c:5440 [inline] hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] port_event drivers/usb/core/hub.c:5740 [inline] hub_event+0x2e62/0x4f30 drivers/usb/core/hub.c:5822 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 process_scheduled_works kernel/workqueue.c:2664 [inline] worker_thread+0x896/0x1110 kernel/workqueue.c:2750 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 </TASK> ================================================================================ --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
