Hello, syzbot found the following crash on: HEAD commit: bdc48fa1 checkpatch/coding-style: deprecate 80-column warn.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15d64586100000 kernel config: https://syzkaller.appspot.com/x/.config?x=129ea1e5950835e5 dashboard link: https://syzkaller.appspot.com/bug?extid=5f1d24c49c1d2c427497 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12d70cf2100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5f1d24c49c1d2c427497@xxxxxxxxxxxxxxxxxxxxxxxxx RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00000000000007dc R14: 00000000004cab2a R15: 00007f5ab0e216d4 ------------[ cut here ]------------ URB 00000000d6b1ff88 submitted while active WARNING: CPU: 1 PID: 8661 at drivers/usb/core/urb.c:363 usb_submit_urb+0x10c1/0x13b0 drivers/usb/core/urb.c:363 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8661 Comm: syz-executor.0 Not tainted 5.7.0-rc7-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+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:usb_submit_urb+0x10c1/0x13b0 drivers/usb/core/urb.c:363 Code: 89 de e8 32 54 6a fc 84 db 0f 85 42 f6 ff ff e8 f5 52 6a fc 4c 89 fe 48 c7 c7 60 46 ab 88 c6 05 22 f3 7b 05 01 e8 b7 82 3b fc <0f> 0b e9 20 f6 ff ff c7 44 24 14 01 00 00 00 e9 d7 f6 ff ff 41 bd RSP: 0018:ffffc9000a37f2c8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815cf161 RDI: fffff5200146fe4b RBP: dffffc0000000000 R08: ffff88808f2242c0 R09: ffffed1015ce66a9 R10: ffff8880ae733547 R11: ffffed1015ce66a8 R12: 0000000000000cc0 R13: 00000000fffffff0 R14: ffff8880a37b6400 R15: ffff8880894c1600 snd_usbmidi_submit_urb+0x19/0x60 sound/usb/midi.c:194 snd_usbmidi_input_start_ep sound/usb/midi.c:2313 [inline] snd_usbmidi_input_start.part.0+0xbe/0x1c0 sound/usb/midi.c:2329 snd_usbmidi_input_start sound/usb/midi.c:1119 [inline] substream_open.isra.0+0x505/0x830 sound/usb/midi.c:1119 open_substream+0x42e/0x880 sound/core/rawmidi.c:299 rawmidi_open_priv+0x2e8/0x6e0 sound/core/rawmidi.c:342 snd_rawmidi_kernel_open+0x1b5/0x270 sound/core/rawmidi.c:382 midisynth_subscribe+0xf2/0x330 sound/core/seq/seq_midi.c:170 subscribe_port sound/core/seq/seq_ports.c:412 [inline] check_and_subscribe_port+0x5b5/0x800 sound/core/seq/seq_ports.c:495 snd_seq_port_connect+0x2e4/0x510 sound/core/seq/seq_ports.c:564 snd_seq_ioctl_subscribe_port+0x1df/0x310 sound/core/seq/seq_clientmgr.c:1484 snd_seq_kernel_client_ctl+0xeb/0x130 sound/core/seq/seq_clientmgr.c:2353 snd_seq_oss_midi_open+0x3cb/0x640 sound/core/seq/oss/seq_oss_midi.c:364 snd_seq_oss_synth_setup_midi+0x123/0x520 sound/core/seq/oss/seq_oss_synth.c:269 snd_seq_oss_open+0x7fa/0x980 sound/core/seq/oss/seq_oss_init.c:261 odev_open+0x6c/0x90 sound/core/seq/oss/seq_oss.c:125 soundcore_open+0x446/0x600 sound/sound_core.c:593 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x4ba/0x1290 fs/open.c:797 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1148 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
