On Tue, Jul 30, 2019 at 6:58 PM syzbot wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit: 7f7867ff 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=10619cec600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=792eb47789f57810 > dashboard link: https://syzkaller.appspot.com/bug?extid=a7a6b9c609b9457c62c6 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10606c42600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+a7a6b9c609b9457c62c6@syzkaller.appspotmail.com Let's try Hillf's patch here as well: #syz test: https://github.com/google/kasan.git 7f7867ff > > ------------[ cut here ]------------ > usb 2-1: BOGUS urb xfer, pipe 2 != type 2 > WARNING: CPU: 1 PID: 7429 at drivers/usb/core/urb.c:477 > usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477 > Kernel panic - not syncing: panic_on_warn set ... > CPU: 1 PID: 7429 Comm: syz-executor.1 Not tainted 5.3.0-rc2+ #23 > 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:1026 > RIP: 0010:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477 > Code: 4d 85 ed 74 2c e8 38 e8 ed fd 4c 89 f7 e8 70 dc 1a ff 41 89 d8 44 89 > e1 4c 89 ea 48 89 c6 48 c7 c7 60 cc f8 85 e8 4d b9 c3 fd <0f> 0b e9 20 f4 > ff ff e8 0c e8 ed fd 4c 89 f2 48 b8 00 00 00 00 00 > RSP: 0018:ffff8881cef0f9d0 EFLAGS: 00010282 > RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff812830fd RDI: ffffed1039de1f2c > RBP: 0000000000000000 R08: ffff8881c853e000 R09: fffffbfff115e1a2 > R10: fffffbfff115e1a1 R11: ffffffff88af0d0f R12: 0000000000000002 > R13: ffff8881d976b0a8 R14: ffff8881d0e02b20 R15: ffff8881d1720600 > 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 > usbhid_set_raw_report drivers/hid/usbhid/hid-core.c:917 [inline] > usbhid_raw_request+0x21f/0x640 drivers/hid/usbhid/hid-core.c:1265 > hid_hw_raw_request include/linux/hid.h:1079 [inline] > hidraw_send_report+0x296/0x500 drivers/hid/hidraw.c:151 > hidraw_ioctl+0x5b4/0xae0 drivers/hid/hidraw.c:421 > vfs_ioctl fs/ioctl.c:46 [inline] > file_ioctl fs/ioctl.c:509 [inline] > do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696 > ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713 > __do_sys_ioctl fs/ioctl.c:720 [inline] > __se_sys_ioctl fs/ioctl.c:718 [inline] > __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 > do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x459829 > Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f6a91f44c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 > RDX: 0000000020000240 RSI: 00000000c0404806 RDI: 0000000000000004 > RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6a91f456d4 > R13: 00000000004c22c3 R14: 00000000004d5688 R15: 00000000ffffffff > Kernel Offset: disabled > Rebooting in 86400 seconds.. >