------------[ cut here ]------------ WARNING: CPU: 0 PID: 10481 at kernel/fork.c:731 __put_task_struct+0x340/0x530 kernel/fork.c:731 Modules linked in: CPU: 0 UID: 0 PID: 10481 Comm: syz.2.816 Not tainted 6.16.0-rc2-syzkaller-00047-g52da431bf03b #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__put_task_struct+0x340/0x530 kernel/fork.c:731 Code: 46 ff 41 00 be 03 00 00 00 4c 89 e7 e8 39 85 5f 03 e9 ed fe ff ff e8 2f ff 41 00 90 0f 0b 90 e9 6d fd ff ff e8 21 ff 41 00 90 <0f> 0b 90 e9 0b fd ff ff e8 13 ff 41 00 90 0f 0b 90 e9 67 fd ff ff RSP: 0018:ffffc9001aaafc50 EFLAGS: 00010287 RAX: 0000000000008b33 RBX: ffff88802e75bc00 RCX: ffffc9000bfc1000 RDX: 0000000000080000 RSI: ffffffff817a1c1f RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802e75bc00 R13: 1ffff92003555f96 R14: ffff88802e75bc28 R15: 0000000000000000 FS: 00007f961dddb6c0(0000) GS:ffff88812475a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3001bff8 CR3: 000000005cebf000 CR4: 0000000000350ef0 Call Trace: put_task_struct include/linux/sched/task.h:145 [inline] put_task_struct include/linux/sched/task.h:132 [inline] io_sq_offload_create+0xe4b/0x1330 io_uring/sqpoll.c:517 io_uring_create io_uring/io_uring.c:3747 [inline] io_uring_setup+0x1514/0x2120 io_uring/io_uring.c:3830 __do_sys_io_uring_setup io_uring/io_uring.c:3864 [inline] __se_sys_io_uring_setup io_uring/io_uring.c:3855 [inline] __x64_sys_io_uring_setup+0xc2/0x170 io_uring/io_uring.c:3855 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f961cf8e929 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:00007f961dddb038 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 00007f961d1b5fa0 RCX: 00007f961cf8e929 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000007d98 RBP: 00007f961d010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f961d1b5fa0 R15: 00007ffe8dd014d8