Warning: Permanently added '10.128.10.63' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.899298] kauditd_printk_skb: 2 callbacks suppressed [ 48.899313] audit: type=1400 audit(1571214207.498:36): avc: denied { map } for pid=7557 comm="syz-executor521" path="/root/syz-executor521818063" 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 [ 48.905619] kasan: CONFIG_KASAN_INLINE enabled [ 48.932180] audit: type=1800 audit(1571214207.498:37): pid=7557 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed(directio) comm="syz-executor521" name="bus" dev="sda1" ino=16484 res=0 [ 48.936437] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.966390] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.972909] CPU: 1 PID: 7557 Comm: syz-executor521 Not tainted 4.19.79 #0 [ 48.979954] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.989530] RIP: 0010:do_blockdev_direct_IO+0x2237/0x8cb0 [ 48.995067] Code: f2 ce ff e9 47 1d 00 00 e8 e6 02 b0 ff 48 8b 84 24 00 01 00 00 48 8d 78 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 6a 00 00 4c 8b b4 24 00 01 00 00 31 ff 4d 8b [ 49.013959] RSP: 0018:ffff888080cc73e0 EFLAGS: 00010202 [ 49.019307] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81bab7b6 [ 49.026574] RDX: 0000000000000001 RSI: ffffffff81bac4fa RDI: 0000000000000008 [ 49.033838] RBP: ffff888080cc7728 R08: ffff8880972d2580 R09: fffff9400042bd87 [ 49.041106] R10: fffff9400042bd86 R11: ffffea000215ec37 R12: ffffea000215ec00 [ 49.048404] R13: ffffea000215ec00 R14: 0000000000000003 R15: ffff8880823ada40 [ 49.055661] FS: 000000000240f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 49.063882] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.069748] CR2: 00005579d8109190 CR3: 0000000098980000 CR4: 00000000001406e0 [ 49.077004] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.084277] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.091529] Call Trace: [ 49.094112] ? ext4_xattr_check_entries+0x32d/0x3b0 [ 49.099117] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.104672] ? sb_init_dio_done_wq+0x90/0x90 [ 49.109069] ? __lock_acquire+0x231b/0x49c0 [ 49.113392] ? current_time+0x6f/0x140 [ 49.117309] ? ext4_dio_get_block_unwritten_sync+0xf0/0xf0 [ 49.122925] ? lock_downgrade+0x880/0x880 [ 49.127068] ? ext4_dio_get_block_unwritten_sync+0xf0/0xf0 [ 49.132701] __blockdev_direct_IO+0xa1/0xca [ 49.137035] ? write_end_fn+0xf0/0xf0 [ 49.140828] ext4_direct_IO+0x990/0x19e0 [ 49.144874] ? ext4_dio_get_block_unwritten_sync+0xf0/0xf0 [ 49.150487] generic_file_direct_write+0x20f/0x4b0 [ 49.155584] __generic_file_write_iter+0x2ee/0x630 [ 49.160515] ext4_file_write_iter+0x32b/0x1060 [ 49.165082] ? ext4_file_mmap+0x410/0x410 [ 49.169224] do_iter_readv_writev+0x558/0x830 [ 49.173709] ? vfs_dedupe_file_range+0x6f0/0x6f0 [ 49.178463] ? security_file_permission+0x89/0x230 [ 49.183379] ? rw_verify_area+0x118/0x360 [ 49.187513] do_iter_write+0x184/0x5f0 [ 49.191402] ? rcu_read_lock_sched_held+0x110/0x130 [ 49.196405] ? __kmalloc+0x5e1/0x750 [ 49.200113] vfs_iter_write+0x77/0xb0 [ 49.203968] iter_file_splice_write+0x661/0xbd0 [ 49.208644] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 49.213988] ? rcu_read_lock_sched_held+0x110/0x130 [ 49.218992] ? rcu_sync_lockdep_assert+0x6d/0xb0 [ 49.223756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.229303] ? __sb_start_write+0x1a9/0x360 [ 49.233632] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 49.238915] do_splice+0x642/0x12c0 [ 49.242544] ? putname+0xf4/0x130 [ 49.246002] ? opipe_prep.part.0+0x2d0/0x2d0 [ 49.250401] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.255932] ? __fget_light+0x1a9/0x230 [ 49.259906] __x64_sys_splice+0x2c6/0x330 [ 49.264054] do_syscall_64+0xfd/0x620 [ 49.267858] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.273044] RIP: 0033:0x4402f9 [ 49.276220] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.295109] RSP: 002b:00007ffc1b786978 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 49.302810] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402f9 [ 49.310065] RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 [ 49.317317] RBP: 00000000006ca018 R08: 00000000ffffffff R09: 0000000000000000 [ 49.324580] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b80 [ 49.331851] R13: 0000000000401c10 R14: 0000000000000000 R15: 0000000000000000 [ 49.339117] Modules linked in: [ 49.342436] ---[ end trace a7ee6332aa2a2a2e ]--- [ 49.347612] RIP: 0010:do_blockdev_direct_IO+0x2237/0x8cb0 [ 49.353140] Code: f2 ce ff e9 47 1d 00 00 e8 e6 02 b0 ff 48 8b 84 24 00 01 00 00 48 8d 78 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 6a 00 00 4c 8b b4 24 00 01 00 00 31 ff 4d 8b [ 49.372654] RSP: 0018:ffff888080cc73e0 EFLAGS: 00010202 [ 49.378120] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81bab7b6 [ 49.385581] RDX: 0000000000000001 RSI: ffffffff81bac4fa RDI: 0000000000000008 [ 49.392948] RBP: ffff888080cc7728 R08: ffff8880972d2580 R09: fffff9400042bd87 [ 49.400255] R10: fffff9400042bd86 R11: ffffea000215ec37 R12: ffffea000215ec00 [ 49.407609] R13: ffffea000215ec00 R14: 0000000000000003 R15: ffff8880823ada40 [ 49.414886] FS: 000000000240f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 49.423171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.429089] CR2: 00005579d8109190 CR3: 0000000098980000 CR4: 00000000001406e0 [ 49.436384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.443678] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.451000] Kernel panic - not syncing: Fatal exception [ 49.457806] Kernel Offset: disabled [ 49.461436] Rebooting in 86400 seconds..