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: 5117 Comm: syz.0.0 Not tainted 6.12.0-rc2-syzkaller-00006-g87d6aab2389e #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: 60 d9 b0 8e 4c 89 e6 48 89 ea e8 0b 36 8f 02 e9 be fc ff ff e8 81 92 2f ff 90 0f 0b e8 79 92 2f ff 90 0f 0b e8 71 92 2f ff 90 <0f> 0b e8 69 92 2f ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90002e2e668 EFLAGS: 00010287 RAX: ffffffff826553ff RBX: 00000000ffffffd8 RCX: 0000000000040000 RDX: ffffc90003042000 RSI: 000000000000887c RDI: 000000000000887d RBP: 0000000000000000 R08: ffffffff826550ff R09: 1ffff11007c534a0 R10: dffffc0000000000 R11: ffffed1007c534a1 R12: ffff88803e29a518 R13: 1ffff11007c2c2c4 R14: 0000000000000034 R15: 1ffff11007c534a3 FS: 00007f2def0196c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2de35ff000 CR3: 0000000023016000 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/0x4e30 fs/ext4/mballoc.c:6208 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0x1141/0x2b70 fs/ext4/indirect.c:635 ext4_map_create_blocks fs/ext4/inode.c:518 [inline] ext4_map_blocks+0x862/0x1960 fs/ext4/inode.c:702 mpage_map_one_extent fs/ext4/inode.c:2208 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2261 [inline] ext4_do_writepages+0x15e0/0x3d20 fs/ext4/inode.c:2724 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2813 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:398 __filemap_fdatawrite_range mm/filemap.c:431 [inline] filemap_write_and_wait_range+0x192/0x280 mm/filemap.c:685 ext4_punch_hole+0x1af/0xc20 fs/ext4/inode.c:3932 ext4_fallocate+0x2a2/0x1ea0 fs/ext4/extents.c:4767 vfs_fallocate+0x569/0x6e0 fs/open.c:333 do_vfs_ioctl+0x2583/0x2e40 fs/ioctl.c:886 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893 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: 0033:0x7f2dee17dff9 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:00007f2def019038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2dee335f80 RCX: 00007f2dee17dff9 RDX: 0000000020000000 RSI: 0000000040305829 RDI: 0000000000000009 RBP: 00007f2dee1f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2dee335f80 R15: 00007ffc5f791218 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x690/0x700 fs/ext4/mballoc.c:4687 Code: 60 d9 b0 8e 4c 89 e6 48 89 ea e8 0b 36 8f 02 e9 be fc ff ff e8 81 92 2f ff 90 0f 0b e8 79 92 2f ff 90 0f 0b e8 71 92 2f ff 90 <0f> 0b e8 69 92 2f ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90002e2e668 EFLAGS: 00010287 RAX: ffffffff826553ff RBX: 00000000ffffffd8 RCX: 0000000000040000 RDX: ffffc90003042000 RSI: 000000000000887c RDI: 000000000000887d RBP: 0000000000000000 R08: ffffffff826550ff R09: 1ffff11007c534a0 R10: dffffc0000000000 R11: ffffed1007c534a1 R12: ffff88803e29a518 R13: 1ffff11007c2c2c4 R14: 0000000000000034 R15: 1ffff11007c534a3 FS: 00007f2def0196c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2de35ff000 CR3: 0000000023016000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400