On Mon, Sep 23, 2019 at 4:31 PM syzbot <syzbot+f5349b421c6213d34ce2@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: e0bd8d79 usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=1452c6a1600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8847e5384a16f66a > dashboard link: https://syzkaller.appspot.com/bug?extid=f5349b421c6213d34ce2 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16342d45600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166769b1600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+f5349b421c6213d34ce2@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > URB 00000000052bee21 submitted while active > WARNING: CPU: 1 PID: 1794 at drivers/usb/core/urb.c:362 > usb_submit_urb+0x10c1/0x13b0 drivers/usb/core/urb.c:362 > Kernel panic - not syncing: panic_on_warn set ... > CPU: 1 PID: 1794 Comm: syz-executor305 Not tainted 5.3.0+ #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+0xca/0x13e lib/dump_stack.c:113 > panic+0x2a3/0x6da kernel/panic.c:219 > __warn.cold+0x20/0x4a kernel/panic.c:576 > report_bug+0x262/0x2a0 lib/bug.c:186 > fixup_bug arch/x86/kernel/traps.c:179 [inline] > fixup_bug arch/x86/kernel/traps.c:174 [inline] > do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272 > do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291 > invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028 > RIP: 0010:usb_submit_urb+0x10c1/0x13b0 drivers/usb/core/urb.c:362 > Code: 89 de e8 92 5b ee fd 84 db 0f 85 42 f6 ff ff e8 55 5a ee fd 4c 89 fe > 48 c7 c7 00 c2 18 86 c6 05 f3 cf 38 04 01 e8 f4 e5 c3 fd <0f> 0b e9 20 f6 > ff ff c7 44 24 14 01 00 00 00 e9 d7 f6 ff ff 41 bd > RSP: 0018:ffff8881d0427b68 EFLAGS: 00010286 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff8128d9ad RDI: ffffed103a084f5f > RBP: ffff8881d070b180 R08: ffff8881d4934800 R09: ffffed103b663ee7 > R10: ffffed103b663ee6 R11: ffff8881db31f737 R12: ffff8881d070b180 > R13: 00000000fffffff0 R14: 0000000000000000 R15: ffff8881d5c22400 > _chaoskey_fill.part.0+0xe0/0x470 drivers/usb/misc/chaoskey.c:367 > _chaoskey_fill+0x1ad/0x230 drivers/usb/misc/chaoskey.c:361 > chaoskey_read+0x2c2/0x4c0 drivers/usb/misc/chaoskey.c:434 > __vfs_read+0x76/0x100 fs/read_write.c:425 > vfs_read+0x1ea/0x430 fs/read_write.c:461 > ksys_read+0x127/0x250 fs/read_write.c:587 > do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x4419c9 > Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007ffc317ed1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004419c9 > RDX: 0000000000000009 RSI: 0000000020000040 RDI: 0000000000000004 > RBP: 000000000000e12e R08: 000000000000000f R09: 00000000004002c8 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402720 > R13: 00000000004027b0 R14: 0000000000000000 R15: 0000000000000000 > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > 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 #syz fix: USB: chaoskey: fix error case of a timeout
