On Thu, Jul 25, 2019 at 7:04 AM syzbot <syzbot+3cbe5cd105d2ad56a...@syzkaller.appspotmail.com> wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit: 6a3599ce 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=108edb68600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae > dashboard link: https://syzkaller.appspot.com/bug?extid=3cbe5cd105d2ad56a1df > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13f0b4c8600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172d8758600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+3cbe5cd105d2ad56a...@syzkaller.appspotmail.com > > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > CPU: 0 PID: 1740 Comm: syz-executor618 Not tainted 5.2.0-rc6+ #15 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:__pm_runtime_resume+0x49/0x180 drivers/base/power/runtime.c:1069 > Code: ed 74 d5 fe 45 85 ed 0f 85 9a 00 00 00 e8 6f 73 d5 fe 48 8d bd c1 02 > 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 > 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 fe 00 00 00 > RSP: 0018:ffff8881cf5878e0 EFLAGS: 00010202 > RAX: dffffc0000000000 RBX: 0000000000000020 RCX: ffffffff82676833 > RDX: 000000021d463be5 RSI: ffffffff82676841 RDI: 00000010ea31df2b > RBP: 00000010ea31dc6a R08: ffff8881d1b7e000 R09: fffffbfff0e84c25 > R10: ffff8881cf587940 R11: ffffffff87426127 R12: 0000000000000004 > R13: 0000000000000000 R14: ffff8881cfd7a500 R15: ffffffff897f9040 > FS: 0000555555808880(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000043f760 CR3: 00000001d0f29000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > pm_runtime_get_sync include/linux/pm_runtime.h:226 [inline] > usb_autopm_get_interface+0x1b/0x50 drivers/usb/core/driver.c:1707 > usbhid_power+0x7c/0xe0 drivers/hid/usbhid/hid-core.c:1234 > hid_hw_power include/linux/hid.h:1038 [inline] > hidraw_open+0x20d/0x740 drivers/hid/hidraw.c:282 > chrdev_open+0x219/0x5c0 fs/char_dev.c:413 > do_dentry_open+0x497/0x1040 fs/open.c:778 > do_last fs/namei.c:3416 [inline] > path_openat+0x1430/0x3ff0 fs/namei.c:3533 > do_filp_open+0x1a1/0x280 fs/namei.c:3563 > do_sys_open+0x3c0/0x580 fs/open.c:1070 > do_syscall_64+0xb7/0x560 arch/x86/entry/common.c:301 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x401ad0 > Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f > 44 00 00 83 3d fd 5b 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff > ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00 > RSP: 002b:00007ffed8d15738 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000401ad0 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffed8d15740 > RBP: 6666666666666667 R08: 000000000000000f R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402af0 > R13: 0000000000402b80 R14: 0000000000000000 R15: 0000000000000000 > Modules linked in: > ---[ end trace 60987a9feed42828 ]--- > RIP: 0010:__pm_runtime_resume+0x49/0x180 drivers/base/power/runtime.c:1069 > Code: ed 74 d5 fe 45 85 ed 0f 85 9a 00 00 00 e8 6f 73 d5 fe 48 8d bd c1 02 > 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 > 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 fe 00 00 00 > RSP: 0018:ffff8881cf5878e0 EFLAGS: 00010202 > RAX: dffffc0000000000 RBX: 0000000000000020 RCX: ffffffff82676833 > RDX: 000000021d463be5 RSI: ffffffff82676841 RDI: 00000010ea31df2b > RBP: 00000010ea31dc6a R08: ffff8881d1b7e000 R09: fffffbfff0e84c25 > R10: ffff8881cf587940 R11: ffffffff87426127 R12: 0000000000000004 > R13: 0000000000000000 R14: ffff8881cfd7a500 R15: ffffffff897f9040 > FS: 0000555555808880(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000043f760 CR3: 00000001d0f29000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >
Let's try Hillf's patch here as well: #syz test: https://github.com/google/kasan.git 6a3599ce
--- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -1410,6 +1410,7 @@ static void usbhid_disconnect(struct usb spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ set_bit(HID_DISCONNECTED, &usbhid->iofl); spin_unlock_irq(&usbhid->lock); + hid_hw_stop(hid); hid_destroy_device(hid); kfree(usbhid); }
