Warning: Permanently added '10.128.1.36' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.692886] kauditd_printk_skb: 2 callbacks suppressed [ 51.692900] audit: type=1400 audit(1568692110.415:36): avc: denied { map } for pid=7599 comm="syz-executor093" path="/root/syz-executor093769899" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.701574] kasan: CONFIG_KASAN_INLINE enabled [ 51.733199] audit: type=1800 audit(1568692110.425:37): pid=7599 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-executor093" name="bus" dev="sda1" ino=16485 res=0 [ 51.735975] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.766197] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 51.772432] CPU: 1 PID: 7599 Comm: syz-executor093 Not tainted 4.19.73 #0 [ 51.779340] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.788695] RIP: 0010:do_blockdev_direct_IO+0x2237/0x8cb0 [ 51.794214] Code: f3 ce ff e9 47 1d 00 00 e8 26 04 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 [ 51.813124] RSP: 0018:ffff88809c68f3e0 EFLAGS: 00010202 [ 51.818919] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81bb5136 [ 51.826257] RDX: 0000000000000001 RSI: ffffffff81bb5e7a RDI: 0000000000000008 [ 51.833510] RBP: ffff88809c68f728 R08: ffff88808ef62000 R09: fffff940004f8e47 [ 51.841219] R10: fffff940004f8e46 R11: ffffea00027c7237 R12: ffffea00027c7200 [ 51.848474] R13: ffffea00027c7200 R14: 0000000000000003 R15: ffff8880a6865a40 [ 51.855727] FS: 0000000000a9d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 51.863939] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.870324] CR2: 0000000020788ffc CR3: 000000009f069000 CR4: 00000000001406e0 [ 51.877575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.884842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.892094] Call Trace: [ 51.894696] ? sb_init_dio_done_wq+0x90/0x90 [ 51.899102] ? __lock_acquire+0x231b/0x49c0 [ 51.903419] ? ext4_dio_get_block_unwritten_sync+0xf0/0xf0 [ 51.909032] ? lock_downgrade+0x810/0x810 [ 51.913597] ? ext4_dio_get_block_unwritten_sync+0xf0/0xf0 [ 51.919210] __blockdev_direct_IO+0xa1/0xca [ 51.923512] ? write_end_fn+0xf0/0xf0 [ 51.927298] ext4_direct_IO+0x990/0x19e0 [ 51.931342] ? ext4_dio_get_block_unwritten_sync+0xf0/0xf0 [ 51.936952] generic_file_direct_write+0x20f/0x4b0 [ 51.941879] __generic_file_write_iter+0x2ee/0x630 [ 51.946796] ext4_file_write_iter+0x32b/0x1060 [ 51.951360] ? ext4_file_mmap+0x410/0x410 [ 51.955496] do_iter_readv_writev+0x558/0x830 [ 51.959977] ? vfs_dedupe_file_range+0x6f0/0x6f0 [ 51.964721] ? security_file_permission+0x89/0x230 [ 51.969635] ? rw_verify_area+0x118/0x360 [ 51.973770] do_iter_write+0x184/0x5f0 [ 51.977642] ? rcu_read_lock_sched_held+0x110/0x130 [ 51.982642] ? __kmalloc+0x5e1/0x750 [ 51.986359] vfs_iter_write+0x77/0xb0 [ 51.990193] iter_file_splice_write+0x661/0xbd0 [ 51.994866] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 52.000140] ? rcu_read_lock_sched_held+0x110/0x130 [ 52.005318] ? rcu_sync_lockdep_assert+0x6d/0xb0 [ 52.010074] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.015597] ? __sb_start_write+0x1a9/0x360 [ 52.019927] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 52.025202] do_splice+0x642/0x12c0 [ 52.028932] ? putname+0xf4/0x130 [ 52.032383] ? opipe_prep.part.0+0x2d0/0x2d0 [ 52.036803] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.042344] ? __fget_light+0x1a9/0x230 [ 52.046448] __x64_sys_splice+0x2c6/0x330 [ 52.050595] do_syscall_64+0xfd/0x620 [ 52.054394] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.059600] RIP: 0033:0x440309 [ 52.062781] 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 [ 52.081739] RSP: 002b:00007fffe1ba7928 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 52.089437] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 [ 52.096696] RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 [ 52.103961] RBP: 00000000006ca018 R08: 00000000ffffffff R09: 0000000000000000 [ 52.111474] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90 [ 52.118912] R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 [ 52.126292] Modules linked in: [ 52.129693] ---[ end trace 78a33ffa642d6128 ]--- [ 52.134471] RIP: 0010:do_blockdev_direct_IO+0x2237/0x8cb0 [ 52.140067] Code: f3 ce ff e9 47 1d 00 00 e8 26 04 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 [ 52.159030] RSP: 0018:ffff88809c68f3e0 EFLAGS: 00010202 [ 52.164381] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81bb5136 [ 52.171715] RDX: 0000000000000001 RSI: ffffffff81bb5e7a RDI: 0000000000000008 [ 52.179050] RBP: ffff88809c68f728 R08: ffff88808ef62000 R09: fffff940004f8e47 [ 52.186318] R10: fffff940004f8e46 R11: ffffea00027c7237 R12: ffffea00027c7200 [ 52.193619] R13: ffffea00027c7200 R14: 0000000000000003 R15: ffff8880a6865a40 [ 52.200935] FS: 0000000000a9d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 52.209181] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.215056] CR2: 0000000020788ffc CR3: 000000009f069000 CR4: 00000000001406e0 [ 52.222449] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.229874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.237323] Kernel panic - not syncing: Fatal exception [ 52.244462] Kernel Offset: disabled [ 52.248098] Rebooting in 86400 seconds..