rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11447/1:b..l rcu: (detected by 1, t=10503 jiffies, g=67321, q=312 ncpus=2) task:syz-executor.3 state:R running task stack:22720 pid:11447 tgid:11446 ppid:10675 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758 Code: 2b 00 74 08 4c 89 f7 e8 2a 84 89 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25 RSP: 0018:ffffc900095a64e0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920012b4ca8 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8bcacd00 RDI: ffffffff8c1ff840 RBP: ffffc900095a6628 R08: ffffffff92fab587 R09: 1ffffffff25f56b0 R10: dffffc0000000000 R11: fffffbfff25f56b1 R12: 1ffff920012b4ca4 R13: dffffc0000000000 R14: ffffc900095a6540 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:329 [inline] rcu_read_lock include/linux/rcupdate.h:781 [inline] is_bpf_text_address+0x46/0x2a0 kernel/bpf/core.c:768 kernel_text_address+0xa7/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kfree+0x149/0x360 mm/slub.c:4558 tipc_dest_pop+0x1b3/0x250 net/tipc/name_table.c:1180 tipc_sk_mcast_rcv+0x892/0x13f0 net/tipc/socket.c:1246 tipc_mcast_xmit+0x12ab/0x19c0 net/tipc/bcast.c:424 tipc_send_group_bcast+0x8bd/0xbd0 net/tipc/socket.c:1131 __tipc_sendmsg+0x363/0x35f0 net/tipc/socket.c:1434 tipc_sendmsg+0x55/0x70 net/tipc/socket.c:1401 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2585 ___sys_sendmsg net/socket.c:2639 [inline] __sys_sendmmsg+0x3b2/0x740 net/socket.c:2725 __do_sys_sendmmsg net/socket.c:2754 [inline] __se_sys_sendmmsg net/socket.c:2751 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2751 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcbafe7cea9 RSP: 002b:00007fcbb0b920c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fcbaffb3f80 RCX: 00007fcbafe7cea9 RDX: 0400000000000181 RSI: 00000000200030c0 RDI: 0000000000000005 RBP: 00007fcbafeebff4 R08: 0000000000000000 R09: 0000000000000000 R10: 9200000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcbaffb3f80 R15: 00007fffbdad3c08 rcu: rcu_preempt kthread starved for 10576 jiffies! g67321 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:26448 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 PID: 11469 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:206 Code: 8b 3d cc ab 45 0c 48 89 de 5b e9 73 4f 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 00 d5 03 00 65 8b 15 f0 ad 6d 7e f7 c2 00 01 ff 00 RSP: 0018:ffffc90004747c58 EFLAGS: 00000202 RAX: ffffffff815cf8fc RBX: 0000000000000002 RCX: 1ffff920008e8f78 RDX: ffff888028dd3c00 RSI: 0000000000000002 RDI: 00000000ffffffff RBP: ffffc90004747db0 R08: ffffffff815cf8f3 R09: 1ffffffff1f5aa15 R10: dffffc0000000000 R11: fffffbfff1f5aa16 R12: ffff888028dd4560 R13: ffffc90004747e50 R14: 1ffff110051ba8ac R15: 1ffff920008e8f90 FS: 00007f96d1dff6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f96d23a4718 CR3: 00000000610f2000 CR4: 0000000000350ef0 Call Trace: signal_delivered kernel/signal.c:2946 [inline] signal_setup_done+0x3dc/0x600 kernel/signal.c:2957 handle_signal arch/x86/kernel/signal.c:285 [inline] arch_do_signal_or_restart+0x51f/0x860 arch/x86/kernel/signal.c:312 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f96d22a4630 Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 5a 9b 04 00 e8 35 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48 RSP: 002b:00007f96d1dfebb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 00007f96d23b3f88 RCX: 00007f96d227cea9 RDX: 00007f96d1dfebc0 RSI: 00007f96d1dfecf0 RDI: 0000000000000021 RBP: 00007f96d23b3f80 R08: 00007f96d1dff6c0 R09: 00007f96d1dff6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f96d23b3f8c R13: 000000000000000b R14: 00007ffeeb9b96a0 R15: 00007ffeeb9b9788