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rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8296/1:b..l rcu: (detected by 1, t=10502 jiffies, g=35513, q=308 ncpus=2) task:syz.0.809 state:R running task stack:26480 pid:8296 tgid:8292 ppid:5372 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 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:__rcu_dereference_sk_user_data_with_flags include/net/sock.h:627 [inline] RIP: 0010:sk_psock include/linux/skmsg.h:292 [inline] RIP: 0010:sk_psock_get+0x159/0x520 include/linux/skmsg.h:454 Code: 20 00 74 08 4c 89 ff e8 05 69 b2 f7 4d 8b 37 e8 cd 35 71 01 89 c3 31 ff 89 c6 e8 82 25 4b f7 85 db 74 1f e8 a9 02 30 f7 89 c3 <31> ff 89 c6 e8 6e 25 4b f7 85 db 0f 84 84 01 00 00 e8 21 21 4b f7 RSP: 0018:ffffc90003f47500 EFLAGS: 00000282 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080000000 RDX: ffff88802a9d1e00 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c608f40 RBP: ffffc90003f475b0 R08: ffffffff8a486b6e R09: 1ffffffff283c908 R10: dffffc0000000000 R11: fffffbfff283c909 R12: dffffc0000000000 R13: 1ffff920007e8eea R14: 0000000000000000 R15: ffff8880530c6c90 tls_sw_recvmsg+0x248/0x1c20 net/tls/tls_sw.c:1982 inet6_recvmsg+0x2cb/0x730 net/ipv6/af_inet6.c:680 sock_recvmsg_nosec+0x9a/0x1d0 net/socket.c:1046 ____sys_recvmsg+0x3c0/0x470 net/socket.c:2814 ___sys_recvmsg net/socket.c:2858 [inline] do_recvmmsg+0x474/0xae0 net/socket.c:2952 __sys_recvmmsg net/socket.c:3031 [inline] __do_sys_recvmmsg net/socket.c:3054 [inline] __se_sys_recvmmsg net/socket.c:3047 [inline] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3047 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: 0033:0x7fa0be17def9 RSP: 002b:00007fa0befec038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fa0be336058 RCX: 00007fa0be17def9 RDX: 00000000ffffff1f RSI: 00000000200061c0 RDI: 0000000000000003 RBP: 00007fa0be1f09f6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000102 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa0be336058 R15: 00007fff2fd6ae88 </TASK> rcu: rcu_preempt kthread starved for 10376 jiffies! g35513 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 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:24912 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236 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 </TASK> rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/09/10 13:48 | upstream | bc83b4d1f086 | 784df80e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: rcu detected stall in inet6_recvmsg |