could not allocate digest TFM handle sha256-asm sp0: Synchronizing with TNC [U] � ODEBUG: free active (active state 0) object type: timer_list hint: resync_tnc+0x0/0x3c0 drivers/net/hamradio/6pack.c:839 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 10186 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: 10186 Comm: syz-executor.0 Not tainted 4.14.277-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+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 RIP: 0010:debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff88807fddfa68 EFLAGS: 00010086 RAX: 0000000000000057 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff878bc600 RDI: ffffed100ffbbf43 RBP: ffffffff878b78c0 R08: 0000000000000057 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88809e932200 R12: ffffffff83f92780 R13: 0000000000000000 R14: ffff8880b2d2a440 R15: ffff8880a1596cb0 __debug_check_no_obj_freed lib/debugobjects.c:747 [inline] debug_check_no_obj_freed+0x3b7/0x680 lib/debugobjects.c:776 kfree+0xb9/0x250 mm/slab.c:3814 kvfree+0x45/0x50 mm/util.c:416 device_release+0x15f/0x1a0 drivers/base/core.c:848 kobject_cleanup lib/kobject.c:646 [inline] kobject_release lib/kobject.c:675 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put+0x251/0x550 lib/kobject.c:692 netdev_run_todo+0x747/0xad0 net/core/dev.c:7969 sixpack_close+0xd3/0x180 drivers/net/hamradio/6pack.c:688 tty_ldisc_close+0x8c/0xc0 drivers/tty/tty_ldisc.c:505 tty_ldisc_kill drivers/tty/tty_ldisc.c:651 [inline] tty_ldisc_release+0xe8/0x400 drivers/tty/tty_ldisc.c:818 tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1603 tty_release+0xb3f/0x10d0 drivers/tty/tty_io.c:1776 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f034e9bcd2b RSP: 002b:00007ffdec0a7860 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f034e9bcd2b RDX: 00007f034eb21d88 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f034eb1e960 R08: 0000000000000000 R09: 00007f034eb21d90 R10: 00007ffdec0a7960 R11: 0000000000000293 R12: 00000000000e48c6 R13: 00007ffdec0a7960 R14: 00007f034eb1cf60 R15: 0000000000000032 ======================================================