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rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6490/1:b..l rcu: (detected by 0, t=10503 jiffies, g=13565, q=649829 ncpus=2) task:syz.3.92 state:R running task stack:23072 pid:6490 tgid:6486 ppid:5854 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7012 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_release+0x658/0xa30 kernel/locking/lockdep.c:5850 Code: 3c 3b 00 74 08 4c 89 f7 e8 85 23 8e 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc90004a1eb80 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff92000943d82 RCX: ffffc90004a1ec03 RDX: 0000000000000002 RSI: ffffffff8c0adcc0 RDI: ffffffff8c610360 RBP: ffffc90004a1ecc0 R08: ffffffff901d02af R09: 1ffffffff203a055 R10: dffffc0000000000 R11: fffffbfff203a056 R12: 1ffff92000943d7c R13: 0000000000000246 R14: ffffc90004a1ec10 R15: dffffc0000000000 rcu_lock_release include/linux/rcupdate.h:347 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] page_ext_put+0xa3/0xc0 mm/page_ext.c:550 __set_page_owner+0x3f0/0x800 mm/page_owner.c:328 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2283 shmem_alloc_folio mm/shmem.c:1769 [inline] shmem_alloc_and_add_folio+0x49b/0x13d0 mm/shmem.c:1808 shmem_get_folio_gfp+0x5a9/0x20a0 mm/shmem.c:2330 shmem_get_folio mm/shmem.c:2436 [inline] shmem_write_begin+0x17e/0x460 mm/shmem.c:3041 generic_perform_write+0x344/0x6d0 mm/filemap.c:4054 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3216 iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11b/0x220 fs/splice.c:1164 splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 do_sendfile+0x561/0xe10 fs/read_write.c:1388 __do_sys_sendfile64 fs/read_write.c:1455 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1441 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: 0033:0x7f27b217e719 RSP: 002b:00007f27b2fad038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f27b2335f80 RCX: 00007f27b217e719 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005 RBP: 00007f27b21f132e R08: 0000000000000000 R09: 0000000000000000 R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f27b2335f80 R15: 00007f27b245fa28 </TASK> rcu: rcu_preempt kthread starved for 7910 jiffies! g13565 f0x2 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:25784 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/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: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc4-syzkaller-00245-gb423f5a9a61f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:unwind_next_frame+0x315/0x22d0 arch/x86/kernel/unwind_orc.c:505 Code: 64 48 01 d2 48 01 f2 0f 84 42 01 00 00 48 8d 5a 04 4c 8d 72 05 48 89 d8 48 c1 e8 03 48 bd 00 00 00 00 00 fc ff df 0f b6 04 28 <84> c0 0f 85 58 18 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 0f RSP: 0000:ffffc90000006ab0 EFLAGS: 00000a07 RAX: 0000000000000000 RBX: ffffffff90a20c24 RCX: ffffffff902cf8b0 RDX: ffffffff90a20c20 RSI: ffffffff90a20c20 RDI: 0000000000000001 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffc90000006c30 R11: fffff52000000d88 R12: 0000000000000000 R13: ffffc90000006be0 R14: ffffffff90a20c25 R15: ffffffff8137c8b4 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8b449d020 CR3: 000000007c63e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> __unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:760 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24 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 mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x1a0/0x440 mm/slub.c:4727 skb_kfree_head net/core/skbuff.c:1086 [inline] skb_free_head net/core/skbuff.c:1098 [inline] skb_release_data+0x6a0/0x8a0 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1436 nft_synproxy_eval_v4+0x3d2/0x610 net/netfilter/nft_synproxy.c:60 nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5666 [inline] __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5779 process_backlog+0x662/0x15b0 net/core/dev.c:6111 __napi_poll+0xcb/0x490 net/core/dev.c:6775 napi_poll net/core/dev.c:6844 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6966 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline] RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 55 a6 a3 00 f3 0f 1e fa fb f4 <fa> c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0000:ffffffff8e607ca8 EFLAGS: 00000246 RAX: ffffffff8e694640 RBX: ffff8881442e0064 RCX: 000000000006ff69 RDX: 0000000000000001 RSI: ffff8881442e0000 RDI: ffff8881442e0064 RBP: 000000000003a9b8 R08: ffff8880b8637e9b R09: 1ffff110170c6fd3 R10: dffffc0000000000 R11: ffffffff8bc72a00 R12: ffff8881456ad800 R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8f12e300 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0x109/0x470 drivers/cpuidle/cpuidle.c:264 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:385 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:326 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424 rest_init+0x2dc/0x300 init/main.c:747 start_kernel+0x47f/0x500 init/main.c:1105 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/10/26 02:21 | upstream | b423f5a9a61f | 65e8686b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: rcu detected stall in sys_sendfile64 | ||
2024/10/05 09:43 | upstream | 27cc6fdf7201 | d7906eff | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | INFO: rcu detected stall in sys_sendfile64 | ||
2024/09/29 20:42 | upstream | e7ed34365879 | ba29ff75 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce | INFO: rcu detected stall in sys_sendfile64 | ||
2024/07/03 20:11 | upstream | e9d22f7a6655 | 409d975c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: rcu detected stall in sys_sendfile64 | ||
2024/05/17 22:55 | upstream | ff2632d7d08e | a12e99e7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: rcu detected stall in sys_sendfile64 | ||
2024/05/24 20:33 | linux-next | 124cfbcd6d18 | 8f98448e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: rcu detected stall in sys_sendfile64 |