------------[ cut here ]------------
ida_free called for id=1098 which is not allocated.
WARNING: CPU: 0 PID: 5928 at lib/idr.c:592 ida_free+0x280/0x310 lib/idr.c:592
Modules linked in:
CPU: 0 UID: 0 PID: 5928 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events free_ipc
RIP: 0010:ida_free+0x280/0x310 lib/idr.c:592
Code: 00 00 00 00 fc ff df 48 8b 5c 24 10 48 8b 7c 24 40 48 89 de e8 21 50 0c 00 90 48 c7 c7 40 ce 94 8c 44 89 fe e8 11 30 47 f6 90 <0f> 0b 90 90 eb 34 e8 65 13 84 f6 49 bd 00 00 00 00 00 fc ff df eb
RSP: 0018:ffffc90005167920 EFLAGS: 00010246
RAX: 2f4a1be940f22300 RBX: 0000000000000a02 RCX: ffff88802f19bc80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90005167a18 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa138 R12: 1ffff92000a2cf28
R13: dffffc0000000000 R14: ffff8880291bec00 R15: 000000000000044a
FS: 0000000000000000(0000) GS:ffff888125d3b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30724224 CR3: 000000007cfb6000 CR4: 00000000003526f0
Call Trace:
<TASK>
free_ipc_ns ipc/namespace.c:164 [inline]
free_ipc+0x1e9/0x250 ipc/namespace.c:181
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3346
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4b9/0x870 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>