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rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8362/1:b..l (detected by 1, t=10503 jiffies, g=32497, q=79 ncpus=2) task:syz.1.1075 state:R running task stack:25728 pid:8362 ppid:4254 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5244 [inline] __schedule+0x10e9/0x40d0 kernel/sched/core.c:6561 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873 irqentry_exit+0x63/0x70 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x81/0x290 mm/kasan/generic.c:189 Code: 03 4e 8d 14 3b 4d 89 d6 4d 29 ce 49 83 fe 10 7f 26 4d 85 f6 0f 84 39 01 00 00 48 f7 d3 4c 01 db 41 80 39 00 0f 85 c1 01 00 00 <49> ff c1 48 ff c3 75 ee e9 1c 01 00 00 44 89 cb 83 e3 07 0f 84 b5 RSP: 0018:ffffc90003516f20 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff81dad774 RDX: 0000000000000001 RSI: 0000000000000080 RDI: ffffc90003516fa0 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff520006a2e03 R10: fffff520006a2e04 R11: 1ffff920006a2df4 R12: dffffc0000000000 R13: 1ffff920006a2df0 R14: 0000000000000010 R15: dffffc0000000001 memset+0x1e/0x40 mm/kasan/shadow.c:44 save_stack+0xc4/0x1e0 mm/page_owner.c:111 __reset_page_owner+0x51/0x1a0 mm/page_owner.c:148 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525 release_pages+0x1f92/0x2200 mm/swap.c:1035 __pagevec_release+0x6d/0xe0 mm/swap.c:1055 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] shmem_undo_range+0x75b/0x2050 mm/shmem.c:946 shmem_truncate_range mm/shmem.c:1062 [inline] shmem_evict_inode+0x248/0xa40 mm/shmem.c:1171 evict+0x485/0x870 fs/inode.c:705 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfa/0x1d0 fs/dcache.c:918 __fput+0x5e0/0x920 fs/file_table.c:328 task_work_run+0x1ca/0x250 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x936/0x2400 kernel/exit.c:871 do_group_exit+0x217/0x2d0 kernel/exit.c:1021 get_signal+0x1272/0x1350 kernel/signal.c:2871 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f9bda78e929 RSP: 002b:00007f9bdb6e4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: 0000000000000007 RBX: 00007f9bda9b5fa0 RCX: 00007f9bda78e929 RDX: 0000000000000010 RSI: 0000200000000080 RDI: 0000000000000011 RBP: 00007f9bda810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9bda9b5fa0 R15: 00007ffc6ee42dd8 </TASK> rcu: rcu_preempt kthread starved for 10553 jiffies! g32497 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:27040 pid:16 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5244 [inline] __schedule+0x10e9/0x40d0 kernel/sched/core.c:6561 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6730 preempt_schedule+0xa7/0xb0 kernel/sched/core.c:6754 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xf6/0x100 kernel/locking/spinlock.c:194 debug_object_free+0x29a/0x3e0 lib/debugobjects.c:855 destroy_timer_on_stack kernel/time/timer.c:812 [inline] schedule_timeout+0x173/0x280 kernel/time/timer.c:1969 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8382 Comm: syz.3.1079 Not tainted 6.1.141-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lockdep_hardirqs_on+0xa6/0x140 kernel/locking/lockdep.c:4379 Code: 48 3b 83 d0 0a 00 00 75 76 49 89 fe 48 c7 c7 e0 ff 6b 8a e8 0c 15 00 00 65 c7 05 91 e4 f2 75 01 00 00 00 4c 89 b3 80 0a 00 00 <8b> 83 78 0a 00 00 ff c0 89 83 78 0a 00 00 89 83 90 0a 00 00 65 48 RSP: 0018:ffffc900035d7be0 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffff88807d045940 RCX: 22beef320c712d00 RDX: dffffc0000000000 RSI: ffffffff8a6bffe0 RDI: ffffffff8abf1360 RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1027fecf81 R10: ffffed1027fecf81 R11: 1ffff11027fecf80 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8a200e86 R15: 0000000000000000 FS: 00007fcb906136c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcb8f9b6088 CR3: 000000001f3c0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline] RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline] RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline] RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:206 Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 4f 99 f8 02 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc900035d7cb0 EFLAGS: 00000246 RAX: 00000000000000f6 RBX: ffffffff8c3d0b78 RCX: 000000000000083f RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff520006baf85 R10: fffff520006baf85 R11: 1ffff920006baf84 R12: ffff8880b8e33e01 R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000020 arch_irq_work_raise+0x82/0xd0 arch/x86/kernel/irq_work.c:31 irq_work_queue+0x95/0x140 kernel/irq_work.c:114 bpf_send_signal_common+0x2b2/0x420 kernel/trace/bpf_trace.c:879 ____bpf_send_signal kernel/trace/bpf_trace.c:888 [inline] bpf_send_signal+0x15/0x20 kernel/trace/bpf_trace.c:886 bpf_prog_7ba5217f62dcd359+0x38/0x3c bpf_dispatcher_nop_func include/linux/bpf.h:1001 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline] bpf_trace_run2+0x1cd/0x3b0 kernel/trace/bpf_trace.c:2324 __bpf_trace_sys_enter+0x60/0x70 include/trace/events/syscalls.h:18 trace_sys_enter+0x6b/0x80 include/trace/events/syscalls.h:18 syscall_trace_enter+0xf0/0x150 kernel/entry/common.c:81 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:77 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fcb8f72ab19 Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25 RSP: 002b:00007fcb90612b40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f RAX: ffffffffffffffda RBX: 00007fcb8f9b6088 RCX: 00007fcb8f72ab19 RDX: 00007fcb90612b40 RSI: 00007fcb90612c70 RDI: 0000000000000011 RBP: 00007fcb8f9b6080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcb8f9b608c R13: 0000000000000000 R14: 00007ffc30d691e0 R15: 00007ffc30d692c8 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/06/27 03:20 | linux-6.1.y | 58485ff1a74f | 803ce19b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/06/15 01:13 | linux-6.1.y | 58485ff1a74f | 5f4b362d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/06/10 16:12 | linux-6.1.y | 58485ff1a74f | 4826c28e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/06/06 03:38 | linux-6.1.y | 58485ff1a74f | 6b6b5f21 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/06/01 22:49 | linux-6.1.y | da3c5173c55f | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/06/01 04:59 | linux-6.1.y | da3c5173c55f | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/05/25 05:54 | linux-6.1.y | da3c5173c55f | ed351ea7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/05/22 05:34 | linux-6.1.y | 325285d9fc86 | 0919b50b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/05/02 23:01 | linux-6.1.y | b6736e03756f | b0714e37 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/05/01 09:28 | linux-6.1.y | 535ec20c5027 | ce7952f4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/04/14 20:59 | linux-6.1.y | 420102835862 | 0bd6db41 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/03/27 02:45 | linux-6.1.y | 344a09659766 | 20510e88 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/03/24 03:31 | linux-6.1.y | 344a09659766 | 875573af | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/03/23 14:12 | linux-6.1.y | 344a09659766 | 4e8d3850 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/03/16 14:30 | linux-6.1.y | 344a09659766 | e2826670 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/03/07 16:28 | linux-6.1.y | 3a8358583626 | 7e3bd60d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/02/07 02:28 | linux-6.1.y | 0cbb5f65e52f | 8002dd28 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/01/07 02:32 | linux-6.1.y | 7dc732d24ff7 | f3558dbf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2025/01/05 15:00 | linux-6.1.y | 7dc732d24ff7 | f3558dbf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/11/29 03:05 | linux-6.1.y | e4d90d63d385 | 5df23865 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/11/28 02:50 | linux-6.1.y | e4d90d63d385 | 5df23865 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/11/03 13:45 | linux-6.1.y | 7c15117f9468 | f00eed24 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/10/07 11:23 | linux-6.1.y | aa4cd140bba5 | d7906eff | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/09/14 02:18 | linux-6.1.y | 5f55cad62cc9 | b58f933c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/08/21 21:13 | linux-6.1.y | ee5e09825b81 | db5852f9 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/07/20 14:02 | linux-6.1.y | 9b3f9a5b12dc | b88348e9 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/07/20 00:30 | linux-6.1.y | 9b3f9a5b12dc | 890ce4f3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/07/19 16:53 | linux-6.1.y | 9b3f9a5b12dc | 890ce4f3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/07/10 17:38 | linux-6.1.y | 7753af06eebf | 6f7fa383 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/22 00:53 | linux-6.1.y | eb44d83053d6 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/21 21:40 | linux-6.1.y | eb44d83053d6 | edc5149a | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/08 10:13 | linux-6.1.y | 88690811da69 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/08 08:48 | linux-6.1.y | 88690811da69 | 82c05ab8 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/07 10:21 | linux-6.1.y | 88690811da69 | 121701b6 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/03 06:34 | linux-6.1.y | 88690811da69 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/06/03 00:53 | linux-6.1.y | 88690811da69 | 3113787f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput | ||
2024/05/28 13:42 | linux-6.1.y | 88690811da69 | f550015e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-6-1-kasan | INFO: rcu detected stall in dput |