netlink: 48 bytes leftover after parsing attributes in process `syz.3.1602'. comedi comedi3: c6xdigio: I/O port conflict (0x401,3) ------------[ cut here ]------------ Unexpected driver unregister! WARNING: drivers/base/driver.c:273 at 0x0, CPU#2: syz.3.1602/10481 Modules linked in: CPU: 2 UID: 0 PID: 10481 Comm: syz.3.1602 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:driver_unregister drivers/base/driver.c:273 [inline] RIP: 0010:driver_unregister+0x89/0xb0 drivers/base/driver.c:270 Code: 00 75 3a 48 8b 73 68 48 89 ef e8 72 3d 88 fc 48 89 df e8 1a 94 ff ff 5b 5d e9 83 56 de fb e8 7e 56 de fb 48 8d 3d f7 cc b2 0a <67> 48 0f b9 3a 5b 5d e9 6b 56 de fb e8 76 8f 46 fc eb 9a e8 6f 8f RSP: 0018:ffffc90026277760 EFLAGS: 00010283 RAX: 0000000000001257 RBX: ffffffff8ff53480 RCX: ffffc9000d171000 RDX: 0000000000080000 RSI: ffffffff85df41f2 RDI: ffffffff90920ef0 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000a83c3baa R12: ffffffff8ff533c0 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880479ec800 FS: 0000000000000000(0000) GS:ffff888097965000(0063) knlGS:00000000f53dcb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000000c30940b CR3: 0000000073f06000 CR4: 0000000000352ef0 Call Trace: comedi_device_detach_locked+0x12f/0xa50 drivers/comedi/drivers.c:207 comedi_device_detach+0x67/0xb0 drivers/comedi/drivers.c:215 comedi_device_attach+0x43d/0x900 drivers/comedi/drivers.c:1011 do_devconfig_ioctl+0x1b1/0x710 drivers/comedi/comedi_fops.c:872 comedi_unlocked_ioctl+0x165d/0x2ee0 drivers/comedi/comedi_fops.c:2178 comedi_compat_ioctl+0x1d0/0x960 drivers/comedi/comedi_fops.c:3249 __do_compat_sys_ioctl fs/ioctl.c:695 [inline] __se_compat_sys_ioctl fs/ioctl.c:638 [inline] __ia32_compat_sys_ioctl+0x242/0x370 fs/ioctl.c:638 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xe8/0x680 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf700d579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f53dc55c EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000040946400 RDX: 0000000080000080 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 00 75 3a add %dh,0x3a(%rbp) 3: 48 8b 73 68 mov 0x68(%rbx),%rsi 7: 48 89 ef mov %rbp,%rdi a: e8 72 3d 88 fc call 0xfc883d81 f: 48 89 df mov %rbx,%rdi 12: e8 1a 94 ff ff call 0xffff9431 17: 5b pop %rbx 18: 5d pop %rbp 19: e9 83 56 de fb jmp 0xfbde56a1 1e: e8 7e 56 de fb call 0xfbde56a1 23: 48 8d 3d f7 cc b2 0a lea 0xab2ccf7(%rip),%rdi # 0xab2cd21 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 6b 56 de fb jmp 0xfbde56a1 36: e8 76 8f 46 fc call 0xfc468fb1 3b: eb 9a jmp 0xffffffd7 3d: e8 .byte 0xe8 3e: 6f outsl %ds:(%rsi),(%dx) 3f: 8f .byte 0x8f