================================================================================ UBSAN: Undefined behaviour in drivers/usb/gadget/udc/dummy_hcd.c:2302:33 shift exponent 16403 is too large for 32-bit type 'int' CPU: 0 PID: 18008 Comm: syz-executor.5 Not tainted 4.19.150-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 MTD: Attempt to mount non-MTD device "/dev/loop1" __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422 dummy_hub_control.cold+0x1a/0xbf drivers/usb/gadget/udc/dummy_hcd.c:2302 rh_call_control drivers/usb/core/hcd.c:679 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline] usb_hcd_submit_urb+0xb7e/0x20d0 drivers/usb/core/hcd.c:1651 usb_submit_urb+0xba2/0x13b0 drivers/usb/core/urb.c:571 usb_start_wait_urb+0x108/0x2b0 drivers/usb/core/message.c:57 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152 proc_control+0x360/0x6d0 drivers/usb/core/devio.c:1143 usbdev_do_ioctl+0x15fc/0x3580 drivers/usb/core/devio.c:2423 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45de59 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4ca2047c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000001afc0 RCX: 000000000045de59 RDX: 0000000020000000 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffdb12bd4df R14: 00007f4ca20489c0 R15: 000000000118bf2c ================================================================================ MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. MTD: Attempt to mount non-MTD device "/dev/loop1" netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" tmpfs: Bad value 'prefer:4 3' for mount option 'mpol' MTD: Attempt to mount non-MTD device "/dev/loop1" tmpfs: Bad value 'prefer:4 3' for mount option 'mpol' MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" audit: type=1400 audit(1602324843.697:223): avc: denied { block_suspend } for pid=18252 comm="syz-executor.3" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" ptrace attach of "/root/syz-executor.5"[18314] was attempted by "/root/syz-executor.5"[18323] MTD: Attempt to mount non-MTD device "/dev/loop1" ptrace attach of "/root/syz-executor.5"[18336] was attempted by "/root/syz-executor.5"[18341] MTD: Attempt to mount non-MTD device "/dev/loop1" ptrace attach of "/root/syz-executor.5"[18352] was attempted by "/root/syz-executor.5"[18357] ptrace attach of "/root/syz-executor.4"[18350] was attempted by "/root/syz-executor.4"[18367] MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" ptrace attach of "/root/syz-executor.4"[18387] was attempted by "/root/syz-executor.4"[18396] MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" ptrace attach of "/root/syz-executor.4"[18408] was attempted by "/root/syz-executor.4"[18412] MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1" MTD: Attempt to mount non-MTD device "/dev/loop1"