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    SubjectRe: [PATCH 4.16 000/196] 4.16.4-stable review
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    On 04/23/2018 12:03 PM, Greg Kroah-Hartman wrote:
    > On Sun, Apr 22, 2018 at 03:50:20PM +0200, Greg Kroah-Hartman wrote:
    >> This is the start of the stable review cycle for the 4.16.4 release.
    >> There are 196 patches in this series, all will be posted as a response
    >> to this one. If anyone has any issues with these being applied, please
    >> let me know.
    >>
    >> Responses should be made by Tue Apr 24 13:50:16 UTC 2018.
    >> Anything received after that time might be too late.
    >>
    >> The whole patch series can be found in one patch at:
    >> https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.16.4-rc1.gz
    >> or in the git tree and branch at:
    >> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.16.y
    >> and the diffstat can be found below.
    >
    > There is a -rc3 out now, to fix some issues reported with -rc1 and -rc2
    > (I forgot to announce -rc2, sorry.):
    > https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.16.4-rc3.gz
    >
    >
    >

    I just tried rc1 - will try rc3. Has the lock problem seen already: ( I will
    try rc3 and if I setill see the problem, will start bisect)

    ================================
    WARNING: inconsistent lock state
    4.16.4-rc1+ #4 Not tainted
    --------------------------------
    inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
    swapper/3/0 [HC1[1]:SC1[1]:HE0:SE0] takes:
    (fs_reclaim){?.+.}, at: [< (ptrval)>] fs_reclaim_acquire.part.76+0x5/0x30
    {HARDIRQ-ON-W} state was registered at:
    fs_reclaim_acquire.part.76+0x29/0x30
    kmem_cache_alloc_node_trace+0x39/0x2a0
    alloc_worker+0x2d/0xa0
    create_worker+0xa0/0x2b0
    workqueue_init+0x315/0x39a
    kernel_init_freeable+0x153/0x312
    kernel_init+0xf/0x120
    ret_from_fork+0x3a/0x50
    irq event stamp: 164931
    hardirqs last enabled at (164930): [< (ptrval)>] __do_softirq+0xe1/0x560
    hardirqs last disabled at (164931): [< (ptrval)>] interrupt_entry+0xbd/0xf0
    softirqs last enabled at (164928): [< (ptrval)>] irq_enter+0x75/0x80
    softirqs last disabled at (164929): [< (ptrval)>] irq_exit+0x104/0x110

    other info that might help us debug this:
    Possible unsafe locking scenario:

    CPU0
    ----
    lock(fs_reclaim);
    <Interrupt>
    lock(fs_reclaim);

    *** DEADLOCK ***

    no locks held by swapper/3/0.

    stack backtrace:
    CPU: 3 PID: 0 Comm: swapper/3 Not tainted 4.16.4-rc1+ #4
    Hardware name: System76, Inc. Wild Dog Performance/H87-PLUS, BIOS 0705 12/05/2013
    Call Trace:
    <IRQ>
    dump_stack+0x67/0x98
    print_usage_bug+0x24c/0x266
    mark_lock+0x6c1/0x7a0
    ? check_usage_backwards+0x230/0x230
    __lock_acquire+0x1237/0x1e20
    ? debug_check_no_locks_freed+0x190/0x190
    ? debug_check_no_locks_freed+0x190/0x190
    ? memzero_explicit+0xa/0x10
    ? extract_buf+0x1b1/0x220
    ? trace_event_raw_event_xfer_secondary_pool+0x1b0/0x1b0
    ? _raw_spin_unlock_irqrestore+0x3e/0x50
    ? match_held_lock+0x1b/0x210
    ? lock_acquire+0xcd/0x220
    lock_acquire+0xcd/0x220
    ? fs_reclaim_acquire.part.76+0x5/0x30
    ? lock_acquire+0xcd/0x220
    fs_reclaim_acquire.part.76+0x29/0x30
    ? fs_reclaim_acquire.part.76+0x5/0x30
    __kmalloc+0x51/0x2e0
    ? crng_reseed+0x229/0x440
    crng_reseed+0x229/0x440
    ? init_std_data+0x1c0/0x1c0
    ? add_interrupt_randomness+0x27d/0x340
    credit_entropy_bits+0x3b7/0x3d0
    add_interrupt_randomness+0x27d/0x340
    ? extract_entropy.constprop.41+0x1b0/0x1b0
    ? rcu_read_lock_sched_held+0x7c/0x80
    ? __handle_irq_event_percpu+0xf9/0x3c0
    handle_irq_event_percpu+0x8b/0xe0
    ? __handle_irq_event_percpu+0x3c0/0x3c0
    ? lock_acquire+0xcd/0x220
    ? handle_edge_irq+0x28/0x2c0
    ? do_raw_spin_unlock+0x91/0x120
    handle_irq_event+0x5a/0x90
    handle_edge_irq+0xef/0x2c0
    handle_irq+0x32/0x40
    do_IRQ+0x60/0x130
    common_interrupt+0xf/0xf
    RIP: 0010:__do_softirq+0xe7/0x560
    RSP: 0018:ffff8803cfec7f58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffde
    RAX: 00000000ffffffff RBX: ffff8803cd6b26c0 RCX: ffffffff8112890c
    RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8803cd6b2f24
    RBP: ffff8803cd6b2ef4 R08: 0000000000000000 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
    R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000202
    ? common_interrupt+0xa/0xf
    ? trace_hardirqs_on_caller+0x18c/0x280
    ? __do_softirq+0xe1/0x560
    irq_exit+0x104/0x110
    smp_apic_timer_interrupt+0xb8/0x300
    apic_timer_interrupt+0xf/0x20
    </IRQ>
    RIP: 0010:cpuidle_enter_state+0xc4/0x430
    RSP: 0018:ffff8803cd6c7d90 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff12
    RAX: 0000000000000000 RBX: ffffe8ffffcca660 RCX: ffffffff8112890c
    RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8803cd6b2f24
    RBP: 0000000000011c2f R08: 0000000000000001 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
    R13: ffffffff82d17658 R14: ffffffff82d17640 R15: ffffffff82d17680
    ? trace_hardirqs_on_caller+0x18c/0x280
    do_idle+0x1a9/0x1f0
    cpu_startup_entry+0xc2/0xd0
    ? cpu_in_idle+0x20/0x20
    ? _raw_spin_unlock_irqrestore+0x32/0x50
    ? trace_hardirqs_on_caller+0x18c/0x280
    start_secondary+0x282/0x2f0
    ? set_cpu_sibling_map+0x840/0x840
    secondary_startup_64+0xa5/0xb0
    random: crng init done
    device: '0:44': device_add
    PM: Adding info for No Bus:0:44
    device: 'lo': device_add
    PM: Adding info for No Bus:lo
    r8169 0000:03:00.0 eth0: link up
    IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
    bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
    device: 'lxcbr0': device_add
    PM: Adding info for No Bus:lxcbr0
    IPv6: ADDRCONF(NETDEV_UP): lxcbr0: link is not ready
    PM: Removing info for No Bus:lxcbr0

    thanks,
    -- Shuah

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