audit: type=1400 audit(1577385852.674:36): avc: denied { map } for pid=7073 comm="syz-executor679" path="/root/syz-executor679377424" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x60 include/linux/compiler.h:210 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7076 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7076 Comm: syz-executor679 Not tainted 4.14.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x142/0x197 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x2f/0x2f kernel/panic.c:547 report_bug+0x216/0x254 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff8880860ffaa8 EFLAGS: 00010086 RAX: 000000000000005e RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86cc4480 RDI: ffffed1010c1ff4b RBP: ffff8880860ffad0 R08: 000000000000005e R09: 0000000000000000 R10: 0000000000000000 R11: ffff888093e5a140 R12: ffffffff86cbf760 R13: ffffffff85c9fb00 R14: 0000000000000000 R15: ffff8880936f4368 __debug_check_no_obj_freed lib/debugobjects.c:747 [inline] debug_check_no_obj_freed+0x3f5/0x7b7 lib/debugobjects.c:776 kfree+0xbd/0x270 mm/slab.c:3814 rfcomm_dlc_free+0x20/0x30 net/bluetooth/rfcomm/core.c:328 rfcomm_dlc_put include/net/bluetooth/rfcomm.h:258 [inline] __rfcomm_create_dev net/bluetooth/rfcomm/tty.c:417 [inline] rfcomm_create_dev net/bluetooth/rfcomm/tty.c:486 [inline] rfcomm_dev_ioctl+0x1637/0x1920 net/bluetooth/rfcomm/tty.c:588 rfcomm_sock_ioctl+0x82/0xa0 net/bluetooth/rfcomm/sock.c:902 sock_do_ioctl+0x64/0xb0 net/socket.c:974 sock_ioctl+0x2a6/0x470 net/socket.c:1071 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4412b9 RSP: 002b:00007ffe70e5b3a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 RBP: 000000000000b731 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 ======================================================