RAX: ffffffffffffffda RBX: 00007fa1489b5fa0 RCX: 00007fa14878e929 RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000059 RBP: 00007fa148810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa1489b5fa0 R15: 00007fffa7871ef8 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5922 at kernel/fork.c:731 __put_task_struct+0x340/0x530 kernel/fork.c:731 Modules linked in: CPU: 0 UID: 0 PID: 5922 Comm: syz.1.2 Not tainted 6.16.0-rc2-syzkaller-00045-g4663747812d1 #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: f6 ac 41 00 be 03 00 00 00 4c 89 e7 e8 f9 c2 5e 03 e9 ed fe ff ff e8 df ac 41 00 90 0f 0b 90 e9 6d fd ff ff e8 d1 ac 41 00 90 <0f> 0b 90 e9 0b fd ff ff e8 c3 ac 41 00 90 0f 0b 90 e9 67 fd ff ff RSP: 0018:ffffc9000430fc50 EFLAGS: 00010283 RAX: 00000000000186fd RBX: ffff88802f11da00 RCX: ffffc9000c129000 RDX: 0000000000080000 RSI: ffffffff8179db7f RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802f11da00 R13: 1ffff92000861f96 R14: ffff88802f11da28 R15: 0000000000000000 FS: 00007fa14967e6c0(0000) GS:ffff888124761000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b308f3ff8 CR3: 000000007bb7e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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+0x1493/0x2080 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/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa14878e929 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:00007fa14967e038 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 00007fa1489b5fa0 RCX: 00007fa14878e929 RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000059 RBP: 00007fa148810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa1489b5fa0 R15: 00007fffa7871ef8