syzbot has found a reproducer for the following issue on: HEAD commit: ef6b35306dd8 Add linux-next specific files for 20220204 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15e40d84700000 kernel config: https://syzkaller.appspot.com/x/.config?x=e0431e0b00810b4f dashboard link: https://syzkaller.appspot.com/bug?extid=0591ccf54ee05344e4eb compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1105f472700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16492aa4700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0591ccf54ee05344e4eb@xxxxxxxxxxxxxxxxxxxxxxxxx usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: Product: syz usb 1-1: Manufacturer: syz usb 1-1: SerialNumber: syz usb 1-1: config 0 descriptor?? general protection fault, probably for non-canonical address 0xdffffc000000008a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000450-0x0000000000000457] CPU: 1 PID: 35 Comm: kworker/1:1 Not tainted 5.17.0-rc2-next-20220204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:dev_fwnode drivers/base/property.c:22 [inline] RIP: 0010:device_property_match_string+0x2c/0xa0 drivers/base/property.c:224 Code: 49 89 d5 41 54 49 89 f4 55 53 48 89 fb e8 bc 01 fa fc 48 8d bb 50 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 5a 48 8b ab 50 04 00 00 48 85 ed 74 22 e8 8d 01 fa RSP: 0018:ffffc900010befd8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000008a RSI: ffffffff847ea734 RDI: 0000000000000450 RBP: ffff8880127ec038 R08: 0000000000000000 R09: ffff8880127ec1a3 R10: ffffffff85ea3a99 R11: 0000000000000000 R12: ffffffff8a658720 R13: ffffffff8a6586e0 R14: ffff8880127ec660 R15: ffff8880127ec664 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd0b1f0910 CR3: 000000007f0f9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> i2c_setup_smbus_alert+0x9c/0x1a0 drivers/i2c/i2c-core-smbus.c:710 i2c_register_adapter+0x32f/0x1150 drivers/i2c/i2c-core-base.c:1482 i2c_add_adapter+0x11a/0x1c0 drivers/i2c/i2c-core-base.c:1587 osif_probe+0x2ae/0x500 drivers/i2c/busses/i2c-robotfuzz-osif.c:164 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:517 [inline] really_probe+0x245/0xcc0 drivers/base/dd.c:596 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:970 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xc17/0x1ee0 drivers/base/core.c:3405 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:517 [inline] really_probe+0x245/0xcc0 drivers/base/dd.c:596 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:970 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xc17/0x1ee0 drivers/base/core.c:3405 usb_new_device.cold+0x63f/0x108e drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5362 [inline] hub_port_connect_change drivers/usb/core/hub.c:5506 [inline] port_event drivers/usb/core/hub.c:5664 [inline] hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5746 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Modules linked in: ---------------- Code disassembly (best guess): 0: 49 89 d5 mov %rdx,%r13 3: 41 54 push %r12 5: 49 89 f4 mov %rsi,%r12 8: 55 push %rbp 9: 53 push %rbx a: 48 89 fb mov %rdi,%rbx d: e8 bc 01 fa fc callq 0xfcfa01ce 12: 48 8d bb 50 04 00 00 lea 0x450(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 5a jne 0x8a 30: 48 8b ab 50 04 00 00 mov 0x450(%rbx),%rbp 37: 48 85 ed test %rbp,%rbp 3a: 74 22 je 0x5e 3c: e8 .byte 0xe8 3d: 8d 01 lea (%rcx),%eax 3f: fa cli
