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=386, nr_sectors = 24 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 193) Buffer I/O error on device loop0, logical block 193 Buffer I/O error on device loop0, logical block 194 Buffer I/O error on device loop0, logical block 195 Buffer I/O error on device loop0, logical block 196 Buffer I/O error on device loop0, logical block 197 Buffer I/O error on device loop0, logical block 198 Buffer I/O error on device loop0, logical block 199 Buffer I/O error on device loop0, logical block 200 Buffer I/O error on device loop0, logical block 201 Buffer I/O error on device loop0, logical block 202 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4755! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5354 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #0 PREEMPT(full) 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+0x6c1/0x720 fs/ext4/mballoc.c:4755 Code: e8 14 de aa ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 80 0c 46 ff 90 0f 0b e8 78 0c 46 ff 90 0f 0b e8 70 0c 46 ff 90 <0f> 0b e8 68 0c 46 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000d256c48 EFLAGS: 00010287 RAX: ffffffff8279a230 RBX: 00000000fffffffc RCX: 0000000000100000 RDX: ffffc9000e37a000 RSI: 00000000000057e0 RDI: 00000000000057e1 RBP: 1ffff1100875c27b R08: ffff888043ae2503 R09: 1ffff1100875c4a0 R10: dffffc0000000000 R11: ffffed100875c4a1 R12: 0000000000000000 R13: 000000000000000c R14: 1ffff1100875c4a3 R15: ffff888043ae2518 FS: 00007fdb1b06a6c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb1b048fc8 CR3: 0000000043030000 CR4: 0000000000352ef0 Call Trace: ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:4972 ext4_mb_new_blocks+0x5b4/0x4720 fs/ext4/mballoc.c:6276 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xe21/0x21b0 fs/ext4/indirect.c:635 ext4_map_create_blocks fs/ext4/inode.c:611 [inline] ext4_map_blocks+0x7fe/0x1740 fs/ext4/inode.c:811 mpage_map_one_extent fs/ext4/inode.c:2374 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2468 [inline] ext4_do_writepages+0x16a1/0x4610 fs/ext4/inode.c:2931 ext4_writepages+0x205/0x350 fs/ext4/inode.c:3025 do_writepages+0x32e/0x550 mm/page-writeback.c:2634 __writeback_single_inode+0x145/0xff0 fs/fs-writeback.c:1680 writeback_single_inode+0x1f3/0x6a0 fs/fs-writeback.c:1801 write_inode_now+0x160/0x1d0 fs/fs-writeback.c:2863 iput_final fs/inode.c:1884 [inline] iput+0x5b9/0x9d0 fs/inode.c:1923 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 __fput+0x68e/0xa70 fs/file_table.c:476 fput_close_sync+0x119/0x200 fs/file_table.c:573 __do_sys_close fs/open.c:1587 [inline] __se_sys_close fs/open.c:1572 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1572 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb1a18eb69 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:00007fdb1b06a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00007fdb1a3b5fa0 RCX: 00007fdb1a18eb69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007fdb1a211df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fdb1a3b5fa0 R15: 00007ffea66a9e98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4755 Code: e8 14 de aa ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 80 0c 46 ff 90 0f 0b e8 78 0c 46 ff 90 0f 0b e8 70 0c 46 ff 90 <0f> 0b e8 68 0c 46 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000d256c48 EFLAGS: 00010287 RAX: ffffffff8279a230 RBX: 00000000fffffffc RCX: 0000000000100000 RDX: ffffc9000e37a000 RSI: 00000000000057e0 RDI: 00000000000057e1 RBP: 1ffff1100875c27b R08: ffff888043ae2503 R09: 1ffff1100875c4a0 R10: dffffc0000000000 R11: ffffed100875c4a1 R12: 0000000000000000 R13: 000000000000000c R14: 1ffff1100875c4a3 R15: ffff888043ae2518 FS: 00007fdb1b06a6c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb1b048fc8 CR3: 0000000043030000 CR4: 0000000000352ef0