EXT4-fs error (device loop9): ext4_mb_generate_buddy:748: group 0, block bitmap and bg descriptor inconsistent: 224 vs 96 free clusters EXT4-fs (loop9): Remounting filesystem read-only ------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:2985! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3010 Comm: syz.9.588 Tainted: G W 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline] RIP: 0010:ext4_mb_find_by_goal+0x968/0x9a0 fs/ext4/mballoc.c:1830 Code: fc ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c 14 fd ff ff 48 8b 7d b0 e8 f6 31 cc ff 48 8b 55 b0 e9 02 fd ff ff e8 d8 37 9e ff <0f> 0b e8 d1 37 9e ff 0f 0b e8 ca 37 9e ff 0f 0b e8 c3 37 9e ff 0f RSP: 0018:ffff8881cfad6c48 EFLAGS: 00010293 RAX: ffffffff81c14708 RBX: 0000000000000001 RCX: ffff8881f31c1f80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff8881cfad6ce0 R08: dffffc0000000000 R09: ffff8881cfad6dc0 R10: ffffed1039f5adbf R11: 1ffff11039f5adb8 R12: 1ffff1103a91187e R13: ffff8881d488c3f0 R14: 0000000000000001 R15: ffff8881cfad6dc0 FS: 00007f23d44e46c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f23d4503fb8 CR3: 00000001c4ba3000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_regular_allocator+0x192/0xfb0 fs/ext4/mballoc.c:2131 ext4_mb_new_blocks+0x5a9/0x2e80 fs/ext4/mballoc.c:4600 ext4_ext_map_blocks+0x183c/0x63c0 fs/ext4/extents.c:4549 ext4_map_blocks+0x92d/0x1b00 fs/ext4/inode.c:661 ext4_xattr_inode_write fs/ext4/xattr.c:1363 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1561 [inline] ext4_xattr_set_entry+0x2932/0x3650 fs/ext4/xattr.c:1685 ext4_xattr_block_set+0x927/0x2a40 fs/ext4/xattr.c:2005 ext4_xattr_set_handle+0xf91/0x1130 fs/ext4/xattr.c:2420 ext4_initxattrs+0xa6/0x110 fs/ext4/xattr_security.c:43 security_inode_init_security+0x252/0x370 security/security.c:1009 ext4_init_security+0x34/0x40 fs/ext4/xattr_security.c:57 __ext4_new_inode+0x27f5/0x31b0 fs/ext4/ialloc.c:1170 ext4_mkdir+0x456/0x15d0 fs/ext4/namei.c:2976 vfs_mkdir+0x4c7/0x6a0 fs/namei.c:3965 do_mkdirat+0x14c/0x340 fs/namei.c:3987 __do_sys_mkdirat fs/namei.c:3998 [inline] __se_sys_mkdirat fs/namei.c:3996 [inline] __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3996 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f23d5e9b1d7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f23d44e3e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f23d44e3ef0 RCX: 00007f23d5e9b1d7 RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c RBP: 00002000000002c0 R08: 00002000000007c0 R09: 0000000000000000 R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000280 R13: 00007f23d44e3eb0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace a379ba6b76562a4e ]--- RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline] RIP: 0010:ext4_mb_find_by_goal+0x968/0x9a0 fs/ext4/mballoc.c:1830 Code: fc ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c 14 fd ff ff 48 8b 7d b0 e8 f6 31 cc ff 48 8b 55 b0 e9 02 fd ff ff e8 d8 37 9e ff <0f> 0b e8 d1 37 9e ff 0f 0b e8 ca 37 9e ff 0f 0b e8 c3 37 9e ff 0f RSP: 0018:ffff8881cfad6c48 EFLAGS: 00010293 RAX: ffffffff81c14708 RBX: 0000000000000001 RCX: ffff8881f31c1f80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff8881cfad6ce0 R08: dffffc0000000000 R09: ffff8881cfad6dc0 R10: ffffed1039f5adbf R11: 1ffff11039f5adb8 R12: 1ffff1103a91187e R13: ffff8881d488c3f0 R14: 0000000000000001 R15: ffff8881cfad6dc0 FS: 00007f23d44e46c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200001000000 CR3: 00000001c4ba3000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400