[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.521662][ T34] audit: type=1400 audit(1606048892.298:8): avc: denied { execmem } for pid=8477 comm="syz-executor078" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 76.537590][ T8478] IPVS: ftp: loaded support on port[0] = 21 [ 77.036004][ T322] general protection fault, probably for non-canonical address 0xf033fc3c3034003c: 0000 [#1] PREEMPT SMP KASAN [ 77.047742][ T322] KASAN: maybe wild-memory-access in range [0x81a001e181a001e0-0x81a001e181a001e7] [ 77.057004][ T322] CPU: 0 PID: 322 Comm: kworker/u4:7 Not tainted 5.10.0-rc4-syzkaller #0 [ 77.065388][ T322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.075442][ T322] Workqueue: tc_filter_workqueue tcindex_destroy_rexts_work [ 77.082714][ T322] RIP: 0010:tcf_action_destroy+0xbc/0x1b0 [ 77.088411][ T322] Code: 83 c4 01 bf 20 00 00 00 48 83 c3 08 44 89 e6 e8 1a 9b 5d fa 41 83 fc 20 0f 84 ac 00 00 00 e8 bb a2 5d fa 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 ac 00 00 00 48 8b 2b 48 85 ed 0f 84 89 00 00 [ 77.107995][ T322] RSP: 0018:ffffc90001ef7c88 EFLAGS: 00010a06 [ 77.114051][ T322] RAX: 1034003c3034003c RBX: 81a001e181a001e1 RCX: 0000000000000000 [ 77.122002][ T322] RDX: ffff888011f961c0 RSI: ffffffff87128ea5 RDI: 81a001e181a001e1 [ 77.130040][ T322] RBP: ffff888038c00008 R08: 0000000000000000 R09: ffffffff8c92a8e7 [ 77.137990][ T322] R10: fffffbfff192551c R11: 0000000000000000 R12: 0000000000000000 [ 77.145939][ T322] R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000 [ 77.153891][ T322] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 77.162809][ T322] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.169462][ T322] CR2: 00007f0c705176c0 CR3: 0000000019186000 CR4: 00000000001506f0 [ 77.177413][ T322] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.185365][ T322] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.193314][ T322] Call Trace: [ 77.196586][ T322] tcf_exts_destroy+0x42/0xc0 [ 77.201241][ T322] __tcindex_destroy_rexts+0x16/0x210 [ 77.206593][ T322] tcindex_destroy_rexts_work+0x17/0x20 [ 77.212124][ T322] process_one_work+0x933/0x15a0 [ 77.217048][ T322] ? lock_release+0x710/0x710 [ 77.221728][ T322] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.227090][ T322] ? rwlock_bug.part.0+0x90/0x90 [ 77.232530][ T322] ? _raw_spin_lock_irq+0x