------------[ cut here ]------------
WARNING: CPU: 0 PID: 3721 at ./include/linux/seqlock.h:221 __seqprop_assert include/linux/seqlock.h:221 [inline]
WARNING: CPU: 0 PID: 3721 at ./include/linux/seqlock.h:221 cgroup_do_freeze kernel/cgroup/freezer.c:182 [inline]
WARNING: CPU: 0 PID: 3721 at ./include/linux/seqlock.h:221 cgroup_freeze+0x7fc/0xcc0 kernel/cgroup/freezer.c:309
Modules linked in:
CPU: 0 UID: 0 PID: 3721 Comm: syz.3.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__seqprop_assert include/linux/seqlock.h:221 [inline]
RIP: 0010:cgroup_do_freeze kernel/cgroup/freezer.c:182 [inline]
RIP: 0010:cgroup_freeze+0x7fc/0xcc0 kernel/cgroup/freezer.c:309
Code: 48 8b 7c 24 48 4c 89 e6 e8 91 2f fe ff 48 89 c3 b1 01 48 85 c0 0f 85 7d f9 ff ff e9 57 03 00 00 90 0f 0b 90 e9 9e fb ff ff 90 <0f> 0b 90 e9 e9 fb ff ff 48 c7 c1 40 ab cb 87 80 e1 07 80 c1 03 38
RSP: 0018:ffffc9000154f8e0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff8880282f0000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff85d5aa60 RDI: 00000000ffffffff
RBP: ffffc9000154fa90 R08: 0000000000000000 R09: ffffffff85937b9b
R10: dffffc0000000000 R11: fffffbfff0f97397 R12: ffff8880282f0000
R13: 1ffff1100505e0ea R14: ffff8880282f0750 R15: dffffc0000000000
FS:  00007f1a5d06f6c0(0000) GS:ffff888130a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33d63fff CR3: 0000000037c50000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 cgroup_freeze_write+0xd6/0x140 kernel/cgroup/cgroup.c:4072
 cgroup_file_write+0x2e3/0x5f0 kernel/cgroup/cgroup.c:4209
 kernfs_fop_write_iter+0x29c/0x3f0 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7c6/0xae0 fs/read_write.c:686
 ksys_write+0x10e/0x1f0 fs/read_write.c:738
 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: 0033:0x7f1a5d1feec9
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:00007f1a5d06f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1a5d455fa0 RCX: 00007f1a5d1feec9
RDX: 0000000000000012 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007f1a5d281f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a5d456038 R14: 00007f1a5d455fa0 R15: 00007ffe2511c118
 </TASK>