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. syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=88, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:346: I/O error 10 writing to inode 15 starting block 44) Buffer I/O error on device loop0, logical block 44 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=92, nr_sectors = 22 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:346: I/O error 10 writing to inode 15 starting block 46) Buffer I/O error on device loop0, logical block 46 Buffer I/O error on device loop0, logical block 47 Buffer I/O error on device loop0, logical block 48 Buffer I/O error on device loop0, logical block 49 Buffer I/O error on device loop0, logical block 50 Buffer I/O error on device loop0, logical block 51 Buffer I/O error on device loop0, logical block 52 Buffer I/O error on device loop0, logical block 53 Buffer I/O error on device loop0, logical block 54 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4689! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5127 Comm: syz.0.0 Not tainted 6.11.0-rc7-syzkaller-00020-g8d8d276ba2fb #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:4689 Code: 00 1e b0 8e 4c 89 e6 48 89 ea e8 2b cb 8b 02 e9 be fc ff ff e8 61 04 33 ff 90 0f 0b e8 59 04 33 ff 90 0f 0b e8 51 04 33 ff 90 <0f> 0b e8 49 04 33 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90002ebe6e8 EFLAGS: 00010293 RAX: ffffffff8260885f RBX: 00000000ffffffc5 RCX: ffff88801ef3c880 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 000000000000001d RBP: 0000000000000000 R08: ffffffff8260855f R09: 1ffff11007f31c66 R10: dffffc0000000000 R11: ffffed1007f31c67 R12: ffff88803f98e348 R13: 1ffff11007f31adf R14: 0000000000000058 R15: 1ffff11007f31c69 FS: 00007f0497f426c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f048c5ff000 CR3: 0000000011a24000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_use_preallocated+0x680/0x1420 fs/ext4/mballoc.c:4906 ext4_mb_new_blocks+0x6ef/0x4e30 fs/ext4/mballoc.c:6210 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0x1084/0x2a10 fs/ext4/indirect.c:635 ext4_map_blocks+0x9f6/0x1d20 fs/ext4/inode.c:654 mpage_map_one_extent fs/ext4/inode.c:2237 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2290 [inline] ext4_do_writepages+0x1605/0x3d40 fs/ext4/inode.c:2753 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2842 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788 generic_buffers_fsync_noflush+0x73/0x170 fs/buffer.c:600 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x413/0xb90 fs/ext4/fsync.c:151 generic_write_sync include/linux/fs.h:2822 [inline] ext4_buffered_write_iter+0x286/0x350 fs/ext4/file.c:305 ext4_file_write_iter+0x1de/0x1a10 do_iter_readv_writev+0x60a/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_writev+0x1b1/0x350 fs/read_write.c:1018 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: 0033:0x7f049717def9 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:00007f0497f42038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f0497335f80 RCX: 00007f049717def9 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000009 RBP: 00007f04971f09f6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0497335f80 R15: 00007ffd8e0e9d98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x690/0x700 fs/ext4/mballoc.c:4689 Code: 00 1e b0 8e 4c 89 e6 48 89 ea e8 2b cb 8b 02 e9 be fc ff ff e8 61 04 33 ff 90 0f 0b e8 59 04 33 ff 90 0f 0b e8 51 04 33 ff 90 <0f> 0b e8 49 04 33 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90002ebe6e8 EFLAGS: 00010293 RAX: ffffffff8260885f RBX: 00000000ffffffc5 RCX: ffff88801ef3c880 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 000000000000001d RBP: 0000000000000000 R08: ffffffff8260855f R09: 1ffff11007f31c66 R10: dffffc0000000000 R11: ffffed1007f31c67 R12: ffff88803f98e348 R13: 1ffff11007f31adf R14: 0000000000000058 R15: 1ffff11007f31c69 FS: 00007f0497f426c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f048c5ff000 CR3: 0000000011a24000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400