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=72, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 15 starting block 36) Buffer I/O error on device loop0, logical block 36 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=78, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 15 starting block 39) Buffer I/O error on device loop0, logical block 39 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=80, nr_sectors = 16 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 15 starting block 40) Buffer I/O error on device loop0, logical block 40 Buffer I/O error on device loop0, logical block 41 Buffer I/O error on device loop0, logical block 42 Buffer I/O error on device loop0, logical block 43 Buffer I/O error on device loop0, logical block 44 Buffer I/O error on device loop0, logical block 45 Buffer I/O error on device loop0, logical block 46 Buffer I/O error on device loop0, logical block 47 EXT4-fs error (device loop0): ext4_do_update_inode:5690: inode #15: comm syz.0.0: corrupted inode contents EXT4-fs error (device loop0): ext4_dirty_inode:6587: inode #15: comm syz.0.0: mark_inode_dirty error ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4780! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5327 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+0x6c1/0x720 fs/ext4/mballoc.c:4780 Code: e8 44 91 a4 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 20 ab 37 ff 90 0f 0b e8 18 ab 37 ff 90 0f 0b e8 10 ab 37 ff 90 <0f> 0b e8 08 ab 37 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000e006648 EFLAGS: 00010287 RAX: ffffffff828e1b10 RBX: 00000000ffffffc6 RCX: 0000000000100000 RDX: ffffc9000eeda000 RSI: 0000000000011f41 RDI: 0000000000011f42 RBP: 1ffff11008de3eb5 R08: ffff888046f24163 R09: 1ffff11008de482c R10: dffffc0000000000 R11: ffffed1008de482d R12: 0000000000000000 R13: 0000000000000058 R14: 1ffff11008de482f R15: ffff888046f24178 FS: 00007fe984df66c0(0000) GS:ffff88808c895000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe984dd4ff8 CR3: 0000000034831000 CR4: 0000000000352ef0 Call Trace: ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:4997 ext4_mb_new_blocks+0x5e2/0x46c0 fs/ext4/mballoc.c:6301 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xe96/0x2260 fs/ext4/indirect.c:635 ext4_map_create_blocks+0xc1/0x540 fs/ext4/inode.c:633 ext4_map_blocks+0x7cd/0x11d0 fs/ext4/inode.c:824 mpage_map_one_extent fs/ext4/inode.c:2396 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2490 [inline] ext4_do_writepages+0x18f3/0x4670 fs/ext4/inode.c:2948 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3042 do_writepages+0x32e/0x550 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+0x76/0x1c0 fs/buffer.c:645 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline] ext4_sync_file+0x437/0xd50 fs/ext4/fsync.c:160 generic_write_sync include/linux/fs.h:2654 [inline] ext4_buffered_write_iter+0x2ca/0x3a0 fs/ext4/file.c:322 ext4_file_write_iter+0x298/0x1bf0 fs/ext4/file.c:-1 do_iter_readv_writev+0x619/0x8c0 fs/read_write.c:-1 vfs_writev+0x33c/0x990 fs/read_write.c:1059 do_pwritev fs/read_write.c:1155 [inline] __do_sys_pwritev2 fs/read_write.c:1213 [inline] __se_sys_pwritev2+0x184/0x2a0 fs/read_write.c:1204 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: 0033:0x7fe983f9ce59 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:00007fe984df5fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fe984215fa0 RCX: 00007fe983f9ce59 RDX: 0000000000000001 RSI: 0000200000000cc0 RDI: 0000000000000006 RBP: 00007fe984032d6f R08: 000000000000000c R09: 0000000000000004 R10: 0000000000000fff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe984216038 R14: 00007fe984215fa0 R15: 00007ffe3e72fd58 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4780 Code: e8 44 91 a4 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 20 ab 37 ff 90 0f 0b e8 18 ab 37 ff 90 0f 0b e8 10 ab 37 ff 90 <0f> 0b e8 08 ab 37 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000e006648 EFLAGS: 00010287 RAX: ffffffff828e1b10 RBX: 00000000ffffffc6 RCX: 0000000000100000 RDX: ffffc9000eeda000 RSI: 0000000000011f41 RDI: 0000000000011f42 RBP: 1ffff11008de3eb5 R08: ffff888046f24163 R09: 1ffff11008de482c R10: dffffc0000000000 R11: ffffed1008de482d R12: 0000000000000000 R13: 0000000000000058 R14: 1ffff11008de482f R15: ffff888046f24178 FS: 00007fe984df66c0(0000) GS:ffff88808c895000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe984dd4ff8 CR3: 0000000034831000 CR4: 0000000000352ef0