Hello, syzbot found the following issue on: HEAD commit: 7ac3a1c1 Merge tag 'mtd/fixes-for-5.13-rc4' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d276efd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9f3da44a01882e99 dashboard link: https://syzkaller.appspot.com/bug?extid=99043e2052d9c50c81fc Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+99043e2052d9c50c81fc@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2625! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 1259 Comm: kworker/u17:7 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:mpage_prepare_extent_to_map+0xb69/0xe20 fs/ext4/inode.c:2625 Code: 8d 5d ff e9 46 fc ff ff e8 d4 02 69 ff 0f 0b e8 cd 02 69 ff 48 c7 c6 80 75 7f 89 4c 89 ef e8 ae 23 9b ff 0f 0b e8 b7 02 69 ff <0f> 0b 45 31 ff e8 ad 02 69 ff 0f b6 9c 24 b8 00 00 00 31 ff 89 de RSP: 0000:ffffc90004467238 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000040 RCX: 0000000000000000 RDX: ffff888016d3c240 RSI: ffffffff820b0ae9 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff820b0874 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffea00015cf440 R14: ffffc900044675c8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd171e3e73f CR3: 0000000045f64000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_writepages+0x941/0x3b70 fs/ext4/inode.c:2754 do_writepages+0xec/0x290 mm/page-writeback.c:2352 __writeback_single_inode+0x126/0xfd0 fs/fs-writeback.c:1467 writeback_sb_inodes+0x53d/0xef0 fs/fs-writeback.c:1732 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1801 wb_writeback+0x814/0xc40 fs/fs-writeback.c:1907 wb_check_start_all fs/fs-writeback.c:2031 [inline] wb_do_writeback fs/fs-writeback.c:2057 [inline] wb_workfn+0xb98/0x12d0 fs/fs-writeback.c:2091 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
