loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): invalid journal inode EXT4-fs (loop0): can't get journal size EXT4-fs (loop0): 1 truncate cleaned up 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=130, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 15 starting block 65) Buffer I/O error on device loop0, logical block 65 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=136, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 15 starting block 68) Buffer I/O error on device loop0, logical block 68 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=138, nr_sectors = 16 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 15 starting block 69) Buffer I/O error on device loop0, logical block 69 Buffer I/O error on device loop0, logical block 70 Buffer I/O error on device loop0, logical block 71 Buffer I/O error on device loop0, logical block 72 Buffer I/O error on device loop0, logical block 73 Buffer I/O error on device loop0, logical block 74 Buffer I/O error on device loop0, logical block 75 Buffer I/O error on device loop0, logical block 76 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4780! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4780 Code: e8 06 bf a3 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 e2 a6 34 ff 90 0f 0b e8 da a6 34 ff 90 0f 0b e8 d2 a6 34 ff 90 <0f> 0b e8 ca a6 34 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80 RSP: 0018:ffffc90005b6e6a0 EFLAGS: 00010283 RAX: ffffffff82919e9e RBX: 00000000fffffffe RCX: 0000000000100000 RDX: ffffc90020001000 RSI: 000000000000b3bb RDI: 000000000000b3bc RBP: 1ffff11008732a7b R08: ffff888043999d2b R09: 1ffff110087333a5 R10: dffffc0000000000 R11: ffffed10087333a6 R12: 0000000000000000 R13: 0000000000000034 R14: 1ffff110087333a8 R15: ffff888043999d40 FS: 00007f4323fc26c0(0000) GS:ffff88808c848000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564ea33c8168 CR3: 000000001336e000 CR4: 0000000000352ef0 Call Trace: ext4_mb_use_preallocated+0x638/0x13e0 fs/ext4/mballoc.c:4997 ext4_mb_new_blocks+0x5a0/0x4530 fs/ext4/mballoc.c:6301 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xe96/0x22a0 fs/ext4/indirect.c:635 ext4_map_create_blocks+0xbb/0x530 fs/ext4/inode.c:633 ext4_map_blocks+0x7e4/0x1240 fs/ext4/inode.c:824 mpage_map_one_extent fs/ext4/inode.c:2397 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2491 [inline] ext4_do_writepages+0x19e3/0x47a0 fs/ext4/inode.c:2949 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3043 do_writepages+0x338/0x560 mm/page-writeback.c:2571 filemap_writeback mm/filemap.c:388 [inline] filemap_fdatawrite_range mm/filemap.c:413 [inline] file_write_and_wait_range+0x36e/0x440 mm/filemap.c:787 mmb_fsync_noflush+0x73/0x1d0 fs/buffer.c:652 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline] ext4_sync_file+0x41a/0xd00 fs/ext4/fsync.c:160 generic_write_sync include/linux/fs.h:2666 [inline] ext4_buffered_write_iter+0x2c7/0x370 fs/ext4/file.c:322 ext4_file_write_iter+0x947/0x1c70 fs/ext4/file.c:-1 do_iter_readv_writev+0x612/0x8c0 fs/read_write.c:-1 vfs_writev+0x343/0x990 fs/read_write.c:1058 do_pwritev fs/read_write.c:1154 [inline] __do_sys_pwritev2 fs/read_write.c:1212 [inline] __se_sys_pwritev2+0x177/0x2a0 fs/read_write.c:1203 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f432319ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4323fc1fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f4323415fa0 RCX: 00007f432319ce59 RDX: 0000000000000001 RSI: 0000200000000cc0 RDI: 000000000000000c RBP: 00007f4323232e6f R08: 000000000000000c R09: 0000000000000004 R10: 0000000000000fff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4323416038 R14: 00007f4323415fa0 R15: 00007ffea623a9a8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4780 Code: e8 06 bf a3 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 e2 a6 34 ff 90 0f 0b e8 da a6 34 ff 90 0f 0b e8 d2 a6 34 ff 90 <0f> 0b e8 ca a6 34 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80 RSP: 0018:ffffc90005b6e6a0 EFLAGS: 00010283 RAX: ffffffff82919e9e RBX: 00000000fffffffe RCX: 0000000000100000 RDX: ffffc90020001000 RSI: 000000000000b3bb RDI: 000000000000b3bc RBP: 1ffff11008732a7b R08: ffff888043999d2b R09: 1ffff110087333a5 R10: dffffc0000000000 R11: ffffed10087333a6 R12: 0000000000000000 R13: 0000000000000034 R14: 1ffff110087333a8 R15: ffff888043999d40 FS: 00007f4323fc26c0(0000) GS:ffff88808c848000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564ea33c8168 CR3: 000000001336e000 CR4: 0000000000352ef0