BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8021, name: syz.3.843 preempt_count: 1, expected: 0 RCU nest depth: 1, expected: 1 3 locks held by syz.3.843/8021: #0: ffffffff8d9a8b80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8d9a8b80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8d9a8b80 (rcu_read_lock){....}-{1:3}, at: bpf_test_timer_enter+0x1a/0x140 net/bpf/test_run.c:40 #1: ffffffff8d84a760 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0xa1/0x400 kernel/softirq.c:163 #2: ffff8880361d9a98 (&stab->lock){+...}-{3:3}, at: spin_lock_bh include/linux/spinlock_rt.h:88 [inline] #2: ffff8880361d9a98 (&stab->lock){+...}-{3:3}, at: __sock_map_delete net/core/sock_map.c:421 [inline] #2: ffff8880361d9a98 (&stab->lock){+...}-{3:3}, at: sock_map_delete_elem+0xb7/0x170 net/core/sock_map.c:452 Preemption disabled at: [] bpf_test_timer_enter+0xf8/0x140 net/bpf/test_run.c:42 CPU: 1 UID: 0 PID: 8021 Comm: syz.3.843 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __might_resched+0x44b/0x5d0 kernel/sched/core.c:8957 __rt_spin_lock kernel/locking/spinlock_rt.c:48 [inline] rt_spin_lock+0xc7/0x2c0 kernel/locking/spinlock_rt.c:57 spin_lock_bh include/linux/spinlock_rt.h:88 [inline] __sock_map_delete net/core/sock_map.c:421 [inline] sock_map_delete_elem+0xb7/0x170 net/core/sock_map.c:452 bpf_prog_2c29ac5cdc6b1842+0x43/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1332 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:742 [inline] bpf_flow_dissect+0x132/0x400 net/core/flow_dissector.c:1024 bpf_prog_test_run_flow_dissector+0x37c/0x5c0 net/bpf/test_run.c:1416 bpf_prog_test_run+0x2ca/0x340 kernel/bpf/syscall.c:4590 __sys_bpf+0x581/0x870 kernel/bpf/syscall.c:6047 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137 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: 0033:0x7eff9009ebe9 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:00007eff8e2fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007eff902c5fa0 RCX: 00007eff9009ebe9 RDX: 0000000000000050 RSI: 0000200000000180 RDI: 000000000000000a RBP: 00007eff90121e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007eff902c6038 R14: 00007eff902c5fa0 R15: 00007ffcd8282cf8