audit: type=1800 audit(1616738844.208:2): pid=9605 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="loop1" ino=17 res=0 batman_adv: batadv0: Interface activated: batadv_slave_1 ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2823! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 9605 Comm: syz-executor.1 Not tainted 4.14.227-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808ed1e440 task.stack: ffff88809ba20000 RIP: 0010:ext4_writepages+0x2246/0x2d30 fs/ext4/inode.c:2822 RSP: 0018:ffff88809ba27630 EFLAGS: 00010247 RAX: 0000028410000000 RBX: 0000000000000001 RCX: 1ffff11011da3e89 RDX: 1ffff1101155ca7a RSI: 0000000000000000 RDI: ffff88808ed1f448 RBP: ffff88809ba27860 R08: 1ffff11011da3d98 R09: 00000000000026c4 R10: ffff88809ba273d0 R11: ffff88808ed1e440 R12: ffff88809c304480 R13: 0000000000000000 R14: ffffed101155cb10 R15: ffff88808aae5570 FS: 00007f45a34e3700(0000) GS:ffff8880ba700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e6dc9 CR3: 000000009a94e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0xba/0x220 mm/page-writeback.c:2361 __filemap_fdatawrite_range+0x213/0x2d0 mm/filemap.c:346 file_write_and_wait_range+0x77/0xd0 mm/filemap.c:678 __generic_file_fsync+0x67/0x1a0 fs/libfs.c:985 ext4_sync_file+0x938/0x1050 fs/ext4/fsync.c:118 vfs_fsync_range+0xe8/0x290 fs/sync.c:196 generic_write_sync include/linux/fs.h:2682 [inline] ext4_file_write_iter+0x316/0xe30 fs/ext4/file.c:281 call_write_iter include/linux/fs.h:1778 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x413/0x840 fs/read_write.c:482 vfs_write+0x150/0x4f0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0x100/0x250 fs/read_write.c:582 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465a59 RSP: 002b:00007f45a34e3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000055bf40 RCX: 0000000000465a59 RDX: 0000000000000082 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00000000004af682 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf40 R13: 00007fff0989a82f R14: 00007f45a34e3300 R15: 0000000000022000 Code: fa 97 87 4c 89 ef e8 9a 18 0b 00 58 44 8b 95 60 fe ff ff 41 be 01 00 00 00 c6 85 18 fe ff ff 01 45 31 ff 45 89 d5 e9 a2 ef ff ff <0f> 0b 48 8b 85 28 fe ff ff 44 8b 8d 64 ff ff ff 44 8b 85 60 ff RIP: ext4_writepages+0x2246/0x2d30 fs/ext4/inode.c:2822 RSP: ffff88809ba27630 Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout device veth1_vlan entered promiscuous mode Bluetooth: hci5 command 0x0419 tx timeout IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready ---[ end trace 07e8714b54b7c412 ]--- IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready