syz-executor4 (5783) used greatest stack depth: 23368 bytes left syz-executor5 (6039) used greatest stack depth: 23112 bytes left syz-executor6 (6441) used greatest stack depth: 22984 bytes left syz-executor2 (7784) used greatest stack depth: 22360 bytes left ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2618! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 2234 Comm: syz-executor3 Not tainted 4.9.124+ #33 task: ffff8801c10217c0 task.stack: ffff8801c1768000 RIP: 0010:[] [] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618 RSP: 0018:ffff8801c176f688 EFLAGS: 00010293 RAX: ffff8801c10217c0 RBX: ffffea0007203a40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8169fd29 RDI: ffffea0007203a50 RBP: ffff8801c176f848 R08: ffff8801c1022070 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: ffff8801c176f9b0 FS: 000000000200c940(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d72c0 CR3: 00000001cb6c9000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 1ffff100382edee0 ffff8801c176f720 ffff8801c176f9b8 ffff8801c176f9c0 0000000200000246 0007ffffffffffff ffff8801c896f4c8 000000080000000c 7fffffffffffffff ffff8801c176f760 ffff8801c176f9c8 ffffed00382edf37 Call Trace: [] ext4_writepages+0xeee/0x2e00 fs/ext4/inode.c:2780 [] do_writepages+0xef/0x1d0 mm/page-writeback.c:2331 [] __filemap_fdatawrite_range+0x1a9/0x250 mm/filemap.c:390 [] filemap_fdatawrite_range+0x2a/0x40 mm/filemap.c:410 [] jbd2_journal_begin_ordered_truncate+0x133/0x190 fs/jbd2/transaction.c:2595 [] ext4_begin_ordered_truncate fs/ext4/inode.c:133 [inline] [] ext4_evict_inode+0xd68/0x1230 fs/ext4/inode.c:233 [] evict+0x22e/0x4f0 fs/inode.c:553 [] iput_final fs/inode.c:1516 [inline] [] iput+0x371/0x900 fs/inode.c:1543 [] do_unlinkat+0x4d5/0x660 fs/namei.c:4087 [] SYSC_unlink fs/namei.c:4128 [inline] [] SyS_unlink+0x1a/0x20 fs/namei.c:4126 [] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: fc ff ff 48 89 95 b0 fe ff ff e8 23 cb c6 ff 48 8b 95 b0 fe ff ff 48 8d 42 ff e9 6f ff ff ff e8 0e cb c6 ff 0f 0b e8 07 cb c6 ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 f8 ca c6 ff 8b 85 18 ff ff ff RIP [] mpage_prepare_extent_to_map+0x719/0x9a0 fs/ext4/inode.c:2618 RSP ---[ end trace 89d721143278b22d ]---