EXT4-fs error (device loop3): ext4_xattr_block_get:544: inode #18: comm syz.3.707: corrupted xattr block 20 EXT4-fs error (device loop3) in ext4_reserve_inode_write:6099: Corrupt filesystem ------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:2984! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 2654 Comm: syz.3.707 Tainted: G W 5.4.276-syzkaller-00020-g4275fce9fe94 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline] RIP: 0010:ext4_mb_find_by_goal+0xba1/0xbe0 fs/ext4/mballoc.c:1830 Code: fc ff ff 48 8b 4c 24 28 80 e1 07 80 c1 03 38 c1 0f 8c 22 fc ff ff 48 8b 7c 24 28 e8 89 74 c8 ff e9 13 fc ff ff e8 6f 8f 98 ff <0f> 0b e8 b8 44 6f ff e8 63 8f 98 ff 0f 0b e8 5c 8f 98 ff 0f 0b e8 RSP: 0018:ffff8881de80e8e0 EFLAGS: 00010287 RAX: ffffffff81cba991 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc900007cd000 RSI: 0000000000000d13 RDI: 0000000000000d14 RBP: ffff8881de80e9f0 R08: ffffffff81cb9f11 R09: ffffed10375540b0 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881e64833f0 R14: 0000000000000001 R15: 1ffff1103cc9067e FS: 00007f60eaa456c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200029c0 CR3: 00000001e5ef9000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_regular_allocator+0x229/0x10d0 fs/ext4/mballoc.c:2132 ext4_mb_new_blocks+0x59a/0x2d10 fs/ext4/mballoc.c:4604 ext4_ext_map_blocks+0x1e70/0x7450 fs/ext4/extents.c:4511 ext4_map_blocks+0xa2f/0x1ba0 fs/ext4/inode.c:661 _ext4_get_block+0x21b/0x610 fs/ext4/inode.c:802 ext4_block_write_begin+0x68a/0x1390 fs/ext4/inode.c:1213 ext4_write_begin+0x5ba/0x1900 fs/ext4/inode.c:1351 ext4_da_write_begin+0x4a3/0xfe0 fs/ext4/inode.c:3110 generic_perform_write+0x2c7/0x560 mm/filemap.c:3450 __generic_file_write_iter+0x224/0x530 mm/filemap.c:3579 ext4_file_write_iter+0x499/0x10e0 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1989 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x5d3/0x750 fs/read_write.c:496 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f60eb7c3b99 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:00007f60eaa45048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f60eb951fa0 RCX: 00007f60eb7c3b99 RDX: 000000000000fd14 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007f60eb84477e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f60eb951fa0 R15: 00007ffd77e26f98