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rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P35/1:b..l P16301/1:b..l P5873/2:b..l P16293/1:b..l rcu: (detected by 1, t=10503 jiffies, g=127625, q=325 ncpus=2) task:syz-executor.1 state:R running task stack:25296 pid:16293 tgid:16290 ppid:15402 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x75/0x3f0 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0xf23/0x19e0 mm/page_alloc.c:2650 folios_put_refs+0x93a/0xa60 mm/swap.c:1024 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x6de/0x1df0 mm/shmem.c:1005 shmem_truncate_range mm/shmem.c:1114 [inline] shmem_evict_inode+0x29b/0xa60 mm/shmem.c:1242 evict+0x2a8/0x630 fs/inode.c:667 __dentry_kill+0x20d/0x630 fs/dcache.c:603 dput+0x19f/0x2b0 fs/dcache.c:845 __fput+0x68c/0x8b0 fs/file_table.c:430 task_work_run+0x24f/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa27/0x27e0 kernel/exit.c:874 do_group_exit+0x207/0x2c0 kernel/exit.c:1023 get_signal+0x16a1/0x1740 kernel/signal.c:2909 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 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: 0033:0x7f769187bc2f RSP: 002b:00007f7692656e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: 0000000000b98000 RBX: 00000000013bd7ef RCX: 00007f769187bc2f RDX: 00000000013bd7ef RSI: 00007f7687600000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000550e R10: 0000000020005d82 R11: 0000000000000293 R12: 0000000000000003 R13: 00007f7692656f80 R14: 00007f7692656f40 R15: 00007f7687600000 </TASK> task:syz-executor.2 state:R running task stack:14240 pid:5873 tgid:5872 ppid:5112 flags:0x00004006 Call Trace: <TASK> 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 0a 95 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:ffffc90004756fc0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920008eae04 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8bcacc20 RDI: ffffffff8c1fe6c0 RBP: ffffc90004757108 R08: ffffffff92fb6587 R09: 1ffffffff25f6cb0 R10: dffffc0000000000 R11: fffffbfff25f6cb1 R12: 1ffff920008eae00 R13: dffffc0000000000 R14: ffffc90004757020 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:329 [inline] rcu_read_lock include/linux/rcupdate.h:781 [inline] percpu_ref_tryget_many include/linux/percpu-refcount.h:241 [inline] percpu_ref_tryget include/linux/percpu-refcount.h:266 [inline] bch2_dev_get_ioref fs/bcachefs/sb-members.h:268 [inline] __bch2_read_extent+0x5de/0x4690 fs/bcachefs/io_read.c:838 __bch2_read+0x10d3/0x2090 fs/bcachefs/io_read.c:1170 bch2_read fs/bcachefs/io_read.h:138 [inline] bch2_direct_IO_read fs/bcachefs/fs-io-direct.c:160 [inline] bch2_read_iter+0xce1/0x1430 fs/bcachefs/fs-io-direct.c:201 do_iter_readv_writev+0x5a4/0x800 vfs_readv+0x2b6/0xa90 fs/read_write.c:932 do_preadv fs/read_write.c:1049 [inline] __do_sys_preadv2 fs/read_write.c:1111 [inline] __se_sys_preadv2+0x1ca/0x2d0 fs/read_write.c:1102 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: 0033:0x7f3ecd47cee9 RSP: 002b:00007f3eccfff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000147 RAX: ffffffffffffffda RBX: 00007f3ecd5b3f80 RCX: 00007f3ecd47cee9 RDX: 1000000000000035 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00007f3ecd4c947f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f3ecd5b3f80 R15: 00007fff299fa808 </TASK> task:syz-executor.0 state:R running task stack:23296 pid:16301 tgid:16300 ppid:14016 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] finish_fault+0x739/0xde0 mm/memory.c:4796 do_read_fault mm/memory.c:4930 [inline] do_fault mm/memory.c:5056 [inline] do_pte_missing mm/memory.c:3903 [inline] handle_pte_fault+0x3db5/0x7130 mm/memory.c:5380 __handle_mm_fault mm/memory.c:5523 [inline] handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5688 faultin_page mm/gup.c:1290 [inline] __get_user_pages+0x6ef/0x1590 mm/gup.c:1589 populate_vma_page_range+0x264/0x330 mm/gup.c:2029 __mm_populate+0x27a/0x460 mm/gup.c:2132 mm_populate include/linux/mm.h:3464 [inline] vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:578 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: 0033:0x7f0ef787cee9 RSP: 002b:00007f0ef85bd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f0ef79b3f80 RCX: 00007f0ef787cee9 RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f0ef78c947f R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0ef79b3f80 R15: 00007ffe9d3ad3b8 </TASK> task:kworker/u8:2 state:R running task stack:19824 pid:35 tgid:35 ppid:2 flags:0x00004000 Workqueue: bat_events batadv_nc_worker Call Trace: <TASK> </TASK> rcu: rcu_preempt kthread starved for 10584 jiffies! g127625 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:24400 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: <TASK> 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+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: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 15402 Comm: syz-executor.1 Not tainted 6.9.0-next-20240523-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319 Code: ca 8b 48 c7 c6 60 dd ca 8b e8 5c a7 cd f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 31 c0 83 3d b7 96 22 04 00 74 1e 83 3d 06 c8 22 04 00 RSP: 0018:ffffc90004707258 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffea0001ac9780 RCX: ffff888057b7da00 RDX: dffffc0000000000 RSI: ffffffff8c1fe6a0 RDI: ffffea0001ac9780 RBP: ffff88813fffa000 R08: ffffffff92fb6587 R09: 1ffffffff25f6cb0 R10: dffffc0000000000 R11: fffffbfff25f6cb1 R12: ffffffff8203890d R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000012 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa7d4fc8f00 CR3: 0000000065a42000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <TASK> rcu_read_unlock include/linux/rcupdate.h:810 [inline] __lruvec_stat_mod_folio+0x217/0x300 mm/memcontrol.c:1066 __folio_remove_rmap mm/rmap.c:1556 [inline] folio_remove_rmap_ptes+0x2bf/0x4f0 mm/rmap.c:1595 zap_present_folio_ptes mm/memory.c:1505 [inline] zap_present_ptes mm/memory.c:1570 [inline] zap_pte_range mm/memory.c:1612 [inline] zap_pmd_range mm/memory.c:1730 [inline] zap_pud_range mm/memory.c:1759 [inline] zap_p4d_range mm/memory.c:1780 [inline] unmap_page_range+0x191f/0x4d00 mm/memory.c:1801 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1891 exit_mmap+0x264/0xc80 mm/mmap.c:3341 __mmput+0x115/0x3c0 kernel/fork.c:1346 exit_mm+0x220/0x310 kernel/exit.c:565 do_exit+0x9aa/0x27e0 kernel/exit.c:861 do_group_exit+0x207/0x2c0 kernel/exit.c:1023 get_signal+0x16a1/0x1740 kernel/signal.c:2909 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 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: 0033:0x7f76918a82f5 Code: Unable to access opcode bytes at 0x7f76918a82cb. RSP: 002b:00007ffe68b02660 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: 0000000000000000 RBX: 000000000000009d RCX: 00007f76918a82f5 RDX: 00007ffe68b026a0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe68b0272c R08: 0000000000000000 R09: 7fffffffffffffff R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000034 R13: 00000000000de9df R14: 00000000000de9df R15: 0000000000000000 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/05/27 22:08 | linux-next | 3689b0ef08b7 | f550015e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: rcu detected stall in bch2_read_iter |