loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 512 to 64 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=258, nr_sectors = 24 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:346: I/O error 10 writing to inode 19 starting block 129) Buffer I/O error on device loop0, logical block 129 Buffer I/O error on device loop0, logical block 130 Buffer I/O error on device loop0, logical block 131 Buffer I/O error on device loop0, logical block 132 Buffer I/O error on device loop0, logical block 133 Buffer I/O error on device loop0, logical block 134 Buffer I/O error on device loop0, logical block 135 Buffer I/O error on device loop0, logical block 136 Buffer I/O error on device loop0, logical block 137 Buffer I/O error on device loop0, logical block 138 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4687! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.13.0-rc2-syzkaller-00382-gdccbe2047a5b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ext4_mb_use_inode_pa+0x690/0x700 fs/ext4/mballoc.c:4687 Code: c0 6d af 8e 4c 89 e6 48 89 ea e8 6b c1 9b 02 e9 be fc ff ff e8 d1 8b 40 ff 90 0f 0b e8 c9 8b 40 ff 90 0f 0b e8 c1 8b 40 ff 90 <0f> 0b e8 b9 8b 40 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000d1966a8 EFLAGS: 00010287 RAX: ffffffff825ee82f RBX: 00000000ffffffd8 RCX: 0000000000100000 RDX: ffffc9000ed62000 RSI: 00000000000093c2 RDI: 00000000000093c3 RBP: 0000000000000000 R08: ffffffff825ee52f R09: 1ffff11008a84a2c R10: dffffc0000000000 R11: ffffed1008a84a2d R12: ffff888045425178 R13: 1ffff11008a84915 R14: 0000000000000034 R15: 1ffff11008a84a2f FS: 00007f833c72b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f833c709fe0 CR3: 0000000045bfc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_use_preallocated+0x680/0x1420 fs/ext4/mballoc.c:4904 ext4_mb_new_blocks+0x6ef/0x4e00 fs/ext4/mballoc.c:6208 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0x108c/0x29e0 fs/ext4/indirect.c:635 ext4_map_create_blocks fs/ext4/inode.c:518 [inline] ext4_map_blocks+0x85d/0x1990 fs/ext4/inode.c:702 mpage_map_one_extent fs/ext4/inode.c:2219 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2272 [inline] ext4_do_writepages+0x15ac/0x3df0 fs/ext4/inode.c:2735 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2824 do_writepages+0x35f/0x880 mm/page-writeback.c:2702 filemap_fdatawrite_wbc mm/filemap.c:397 [inline] __filemap_fdatawrite_range mm/filemap.c:430 [inline] filemap_write_and_wait_range+0x283/0x3a0 mm/filemap.c:684 ext4_punch_hole+0x1af/0xc20 fs/ext4/inode.c:3964 ext4_fallocate+0x2a2/0x1ea0 fs/ext4/extents.c:4772 vfs_fallocate+0x569/0x6e0 fs/open.c:327 do_vfs_ioctl+0x258c/0x2e40 fs/ioctl.c:885 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f833b985d19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f833c72b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f833bb75fa0 RCX: 00007f833b985d19 RDX: 00000000200000c0 RSI: 0000000040305829 RDI: 0000000000000006 RBP: 00007f833ba01a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f833bb75fa0 R15: 00007ffc65d69ea8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x690/0x700 fs/ext4/mballoc.c:4687 Code: c0 6d af 8e 4c 89 e6 48 89 ea e8 6b c1 9b 02 e9 be fc ff ff e8 d1 8b 40 ff 90 0f 0b e8 c9 8b 40 ff 90 0f 0b e8 c1 8b 40 ff 90 <0f> 0b e8 b9 8b 40 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000d1966a8 EFLAGS: 00010287 RAX: ffffffff825ee82f RBX: 00000000ffffffd8 RCX: 0000000000100000 RDX: ffffc9000ed62000 RSI: 00000000000093c2 RDI: 00000000000093c3 RBP: 0000000000000000 R08: ffffffff825ee52f R09: 1ffff11008a84a2c R10: dffffc0000000000 R11: ffffed1008a84a2d R12: ffff888045425178 R13: 1ffff11008a84915 R14: 0000000000000034 R15: 1ffff11008a84a2f FS: 00007f833c72b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f833c709fe0 CR3: 0000000045bfc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400