input: syz0 as /devices/virtual/input/input71 input: syz0 as /devices/virtual/input/input72 ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2062! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 353 Comm: jbd2/sda1-8 Not tainted 4.9.130+ #3 task: ffff8801d5ce5f00 task.stack: ffff8801d53f0000 RIP: 0010:[] [] ext4_writepage+0xbe5/0x1860 fs/ext4/inode.c:2062 RSP: 0018:ffff8801d53f74c0 EFLAGS: 00010293 RAX: ffff8801d5ce5f00 RBX: 0000000000008200 RCX: ffffea00067e77c0 RDX: 0000000000000000 RSI: ffffffff816d8125 RDI: ffff8801d4536b10 RBP: ffff8801d53f75c0 R08: 0000000000024bb0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82ad73a0 R13: ffffea00067e77c0 R14: ffffea00067e77c0 R15: ffffea00067e77c0 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f848f6dd000 CR3: 00000001d3077000 CR4: 00000000001606b0 Stack: ffff8801d53f75b8 ffffffff814c1c2d ffffea00067e77d0 ffffea00067e77c8 1ffff1003aa7eea3 ffff8801d53f7b50 ffff8801d4536ac0 ffff8801d53f76b8 ffffea00067e77c0 0000100000000001 ffff8801d5ce67a8 0000000041b58ab3 Call Trace: [] __writepage+0x64/0xc0 mm/page-writeback.c:2293 [] write_cache_pages+0x4d5/0xe80 mm/page-writeback.c:2231 [] generic_writepages+0xda/0x150 mm/page-writeback.c:2317 [] journal_submit_inode_data_buffers fs/jbd2/commit.c:201 [inline] [] journal_submit_data_buffers fs/jbd2/commit.c:234 [inline] [] jbd2_journal_commit_transaction+0xdea/0x65e0 fs/jbd2/commit.c:536 [] kjournald2+0x22a/0x830 fs/jbd2/journal.c:224 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Code: 4d 85 ed 75 ba e8 6c 31 c4 ff 65 ff 0d 85 fc 93 7e 0f 85 34 f5 ff ff e8 5a 31 c4 ff e8 9d a1 92 ff e9 25 f5 ff ff e8 4b 31 c4 ff <0f> 0b e8 44 31 c4 ff 48 8b 85 40 ff ff ff f0 80 60 01 fe e8 33 RIP [] ext4_writepage+0xbe5/0x1860 fs/ext4/inode.c:2062 RSP ---[ end trace 570887813f20ccc6 ]---