syzbot |
sign-in | mailing list | source | docs |
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4762/1:b..l P4576/1:b..l (detected by 0, t=10502 jiffies, g=13065, q=22 ncpus=2) task:udevd state:R running task stack:24544 pid:4576 ppid:3623 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:folio_contains+0x0/0x580 include/linux/pagemap.h:732 Code: 31 ff e8 23 2a d5 ff 49 ff ce 4c 39 f3 0f 94 c0 40 08 e8 74 0a e8 30 26 d5 ff e9 e1 fe ff ff e8 26 26 d5 ff e9 30 ff ff ff 90 <55> 41 57 41 56 41 55 41 54 53 50 49 89 f6 48 89 fb 49 bc 00 00 00 RSP: 0018:ffffc9000528f698 EFLAGS: 00000246 RAX: 0000000000008000 RBX: 0000000000000000 RCX: ffff88807b68d940 RDX: 0000000000000000 RSI: 000000000000024c RDI: ffffea00014d9640 RBP: ffffc9000528f7d0 R08: dffffc0000000000 R09: fffff9400029b2c9 R10: fffff9400029b2c9 R11: 1ffffd400029b2c8 R12: 1ffffd400029b2ce R13: ffffea00014d9674 R14: ffffea00014d9648 R15: ffffea00014d9640 find_lock_entries+0x5db/0xb90 mm/filemap.c:2134 shmem_undo_range+0x227/0x2050 mm/shmem.c:925 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 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 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: 0033:0x7fa5aa8a7407 RSP: 002b:00007ffe3269a4a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007fa5ab0a8880 RCX: 00007fa5aa8a7407 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 00007fa5ab0a86e8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000002 R13: 000055efd2bbe3c0 R14: 0000000000000008 R15: 000055efd2bb9dd0 </TASK> task:syz.2.95 state:R running task stack:25856 pid:4762 ppid:4264 flags:0x00004002 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 unwind_next_frame+0x1892/0x20b0 arch/x86/kernel/unwind_orc.c:629 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122 save_stack+0xf3/0x1e0 mm/page_owner.c:127 __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: 0033:0x7fdbdd78e929 RSP: 002b:00007fdbde5c0038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: 0000000000010106 RBX: 00007fdbdd9b6080 RCX: 00007fdbdd78e929 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007fdbdd810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fdbdd9b6080 R15: 00007ffd683e8758 </TASK> rcu: rcu_preempt kthread starved for 10374 jiffies! g13065 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:26912 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 schedule+0xb9/0x180 kernel/sched/core.c:6637 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965 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: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.141-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:736 Code: 48 89 df e8 47 d4 b8 f7 e9 4c ff ff ff e8 bd 15 f6 ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 66 90 0f 00 2d 17 24 4d 00 fb f4 <c3> 0f 1f 40 00 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48 RSP: 0018:ffffffff8c607d88 EFLAGS: 000002c6 RAX: 48c66fc1ae78f800 RBX: ffffffff8a197f77 RCX: 48c66fc1ae78f800 RDX: 0000000000000001 RSI: ffffffff8a6bffe0 RDI: ffffffff8abf1360 RBP: ffffffff8c607ec0 R08: dffffc0000000000 R09: ffffed10171c6af6 R10: ffffed10171c6af6 R11: 1ffff110171c6af5 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff8c6bc680 R15: 1ffffffff1bfd0f6 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f680931999a CR3: 000000005cfcc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> default_idle_call+0x84/0xc0 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x1fc/0x570 kernel/sched/idle.c:303 cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401 rest_init+0x2dc/0x300 init/main.c:733 arch_call_rest_init+0xa/0xa init/main.c:893 start_kernel+0x490/0x539 init/main.c:1140 secondary_startup_64_no_verify+0xcf/0xdb </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
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 |