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=524288, sector=70, nr_sectors = 18 limit=64 syz.0.0: attempt to access beyond end of device loop0: rw=0, sector=70, nr_sectors = 8 limit=64 netlink: 'syz.0.0': attribute type 4 has an invalid length. netlink: 'syz.0.0': attribute type 4 has an invalid length. netlink: 204124 bytes leftover after parsing attributes in process `syz.0.0'. netlink: 'syz.0.0': attribute type 4 has an invalid length. netlink: 'syz.0.0': attribute type 4 has an invalid length. netlink: 204124 bytes leftover after parsing attributes in process `syz.0.0'. ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4687! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5103 Comm: syz.0.0 Not tainted 6.12.0-rc4-syzkaller-00085-g4e46774408d9 #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: e0 d9 b0 8e 4c 89 e6 48 89 ea e8 1b 4a 90 02 e9 be fc ff ff e8 41 81 2f ff 90 0f 0b e8 39 81 2f ff 90 0f 0b e8 31 81 2f ff 90 <0f> 0b e8 29 81 2f ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000b2866c8 EFLAGS: 00010283 RAX: ffffffff826556af RBX: 00000000ffffffbc RCX: 0000000000040000 RDX: ffffc9000b6d1000 RSI: 000000000000844b RDI: 000000000000844c RBP: 0000000000000000 R08: ffffffff826553af R09: 1ffff110081c6666 R10: dffffc0000000000 R11: ffffed10081c6667 R12: ffff888040e33348 R13: 1ffff110081f4207 R14: 0000000000000062 R15: 1ffff110081c6669 FS: 00007f7b909a66c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe71b1de78 CR3: 000000003e0cc000 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] file_write_and_wait_range+0x195/0x280 mm/filemap.c:788 generic_buffers_fsync_noflush+0x71/0x180 fs/buffer.c:600 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x40a/0xb90 fs/ext4/fsync.c:151 generic_write_sync include/linux/fs.h:2871 [inline] ext4_buffered_write_iter+0x284/0x350 fs/ext4/file.c:305 ext4_file_write_iter+0x1dd/0x1a20 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215 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: 0033:0x7f7b8fb7e719 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:00007f7b909a6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f7b8fd35f80 RCX: 00007f7b8fb7e719 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 000000000000000d RBP: 00007f7b8fbf12be R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7b8fd35f80 R15: 00007fffc8406de8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x690/0x700 fs/ext4/mballoc.c:4687 Code: e0 d9 b0 8e 4c 89 e6 48 89 ea e8 1b 4a 90 02 e9 be fc ff ff e8 41 81 2f ff 90 0f 0b e8 39 81 2f ff 90 0f 0b e8 31 81 2f ff 90 <0f> 0b e8 29 81 2f ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000b2866c8 EFLAGS: 00010283 RAX: ffffffff826556af RBX: 00000000ffffffbc RCX: 0000000000040000 RDX: ffffc9000b6d1000 RSI: 000000000000844b RDI: 000000000000844c RBP: 0000000000000000 R08: ffffffff826553af R09: 1ffff110081c6666 R10: dffffc0000000000 R11: ffffed10081c6667 R12: ffff888040e33348 R13: 1ffff110081f4207 R14: 0000000000000062 R15: 1ffff110081c6669 FS: 00007f7b909a66c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe71b1de78 CR3: 000000003e0cc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400