------------[ cut here ]------------
kernel BUG at fs/ext4/super.c:6422!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 407 Comm: syz-executor.4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_quota_enable fs/ext4/super.c:6422 [inline]
RIP: 0010:ext4_enable_quotas+0x6ca/0x6d0 fs/ext4/super.c:6469
Code: ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c a3 fa ff ff 4c 89 f7 e8 15 a3 c1 ff e9 96 fa ff ff e8 eb 14 c7 02 e8 b6 74 82 ff <0f> 0b 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec
RSP: 0018:ffffc9000117f910 EFLAGS: 00010293
RAX: ffffffff81e7584a RBX: ffff888111e24000 RCX: ffff88810de03b40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000117f9b0 R08: ffff888120ea02cb R09: 1ffff110241d4059
R10: dffffc0000000000 R11: ffffed10241d405a R12: 0000000000000004
R13: ffff88811db55464 R14: 0000000000000000 R15: 0000000000000001
FS:  00007f556ebce6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f556f07d490 CR3: 000000011e6a1000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_fill_super+0x82fa/0x8bd0 fs/ext4/super.c:4976
 mount_bdev+0x2ae/0x3e0 fs/super.c:1400
 ext4_mount+0x34/0x40 fs/ext4/super.c:6648
 legacy_get_tree+0xed/0x190 fs/fs_context.c:611
 vfs_get_tree+0x89/0x260 fs/super.c:1530
 do_new_mount+0x25a/0xa20 fs/namespace.c:3034
 path_mount+0x659/0xff0 fs/namespace.c:3364
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3562
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3562
 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f556f03c70a
Code: 48 c7 c2 d0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f556ebcded8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f556ebcdf70 RCX: 00007f556f03c70a
RDX: 00000000200005c0 RSI: 0000000020000000 RDI: 00007f556ebcdf30
RBP: 00000000200005c0 R08: 00007f556ebcdf70 R09: 0000000000200810
R10: 0000000000200810 R11: 0000000000000246 R12: 0000000020000000
R13: 00007f556ebcdf30 R14: 00000000000004da R15: 0000000020001400
 </TASK>
Modules linked in:
---[ end trace 8e59f543b5eb10f3 ]---
RIP: 0010:ext4_quota_enable fs/ext4/super.c:6422 [inline]
RIP: 0010:ext4_enable_quotas+0x6ca/0x6d0 fs/ext4/super.c:6469
Code: ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c a3 fa ff ff 4c 89 f7 e8 15 a3 c1 ff e9 96 fa ff ff e8 eb 14 c7 02 e8 b6 74 82 ff <0f> 0b 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec
RSP: 0018:ffffc9000117f910 EFLAGS: 00010293
RAX: ffffffff81e7584a RBX: ffff888111e24000 RCX: ffff88810de03b40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000117f9b0 R08: ffff888120ea02cb R09: 1ffff110241d4059
R10: dffffc0000000000 R11: ffffed10241d405a R12: 0000000000000004
R13: ffff88811db55464 R14: 0000000000000000 R15: 0000000000000001
FS:  00007f556ebce6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c20000 CR3: 000000011e6a1000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400