New subject: [virtio_pci] 563d3bbe44: WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1478 __free_irq

Thursday, 15 December 2016


Greetings,

0day kernel testing robot got the below dmesg and the first bad commit is

https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost

commit 563d3bbe444501ac1943d93c74f90460424e0af4
Author:     Christoph Hellwig <hch(a)lst.de&gt;
AuthorDate: Thu Nov 17 11:43:17 2016 +0100
Commit:     Michael S. Tsirkin <mst(a)redhat.com&gt;
CommitDate: Thu Dec 15 06:59:22 2016 +0200

    virtio_pci: use shared interrupts for virtqueues
    
    This lets IRQ layer handle dispatching IRQs to separate handlers for the
    case where we don't have per-VQ MSI-X vectors, and allows us to greatly
    simplify the code based on the assumption that we always have interrupt
    vector 0 (legacy INTx or config interrupt for MSI-X) available, and
    any other interrupt is request/freed throught the VQ, even if the
    actual interrupt line might be shared in some cases.
    
    This allows removing a great deal of variables keeping track of the
    interrupt state in struct virtio_pci_device, as we can now simply walk the
    list of VQs and deal with per-VQ interrupt handlers there, and only treat
    vector 0 special.  As a little caveat this means we have to check if VQs
    have been set up before calling vp_synchronize_vectors, as otherwise
    the initial reset will trip over the uninitialized ->vqs array.
    
    Signed-off-by: Christoph Hellwig <hch(a)lst.de&gt;
    Signed-off-by: Michael S. Tsirkin <mst(a)redhat.com&gt;

+-------------------------------------------------+------------+------------+------------+
|                                                 | b58235ea57 | 563d3bbe44 | 48c85573af
|
+-------------------------------------------------+------------+------------+------------+
| boot_successes                                  | 54         | 0          | 0         
|
| boot_failures                                   | 9          | 22         | 13        
|
| BUG:kernel_reboot-without-warning_in_test_stage | 9          |            |           
|
| WARNING:at_kernel/irq/manage.c:#__free_irq      | 0          | 22         | 13        
|
+-------------------------------------------------+------------+------------+------------+

[   14.418050] skd:  v2.2.1-b0260 loaded
[   14.419544] MM: desc_per_page = 128
[   14.420998] ------------[ cut here ]------------
[   14.422409] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1478 __free_irq+0xe3/0x440
[   14.425598] Trying to free already-free IRQ 11
[   14.427224] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-08495-g563d3bb #1
[   14.428995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.9.3-20161025_171302-gandalf 04/01/2014
[   14.431804] Call Trace:
[   14.432822]  dump_stack+0x10e/0x17e
[   14.433986]  ? __free_irq+0xe3/0x440
[   14.435181]  __warn+0x153/0x180

git bisect start 48c85573afde79fbf2e2666a826dd0af68d33fb7
69973b830859bc6529a7a0468ba0d80ee5117826 --
git bisect  bad 74df3431678edef19b8a8997b435580cbcee21d8  # 00:04      0-      4  Merge
'asoc/topic/zte' into devel-catchup-201612152110
git bisect  bad 49e5c06b56b2b67b00d01650f167e48a8269bf83  # 00:22      0-      6  Merge
'asoc/for-next' into devel-catchup-201612152110
git bisect  bad cdad3be8e4626b17c1b410b6e234de85bb3c9827  # 00:41      0-      1  Merge
'linux-review/Vincent-Pelletier/usb-gadget-f_fs-Document-eventfd-effect-on-descriptor-format/20161215-210226'
into devel-catchup-201612152110
git bisect good 4275eedf2de20a7df028d840fa795f729a56dd58  # 00:53     22+      6  Merge
'linux-review/Markus-Trippelsdorf/x86-64-Fix-gcc-7-warning-in-relocs-c/20161215-210553'
into devel-catchup-201612152110
git bisect  bad a6faac3d75ed58a3cc82f5c4d9168bc4a346698f  # 01:05      0-     16  Merge
'vhost/vhost' into devel-catchup-201612152110
git bisect good 9439b3710df688d853eb6cb4851256f2c92b1797  # 01:17     22+      2  Merge
tag 'drm-for-v4.10' of git://people.freedesktop.org/~airlied/linux
git bisect good b78b499a67c3f77aeb6cd0b54724bc38b141255d  # 01:27     22+      3  Merge
tag 'char-misc-4.10-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
git bisect good 2a4c32edd39b7de166e723b1991abcde4db3a701  # 01:40     22+      1  Merge
branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
git bisect good ce38207f161513ee3d2bd3860489f07ebe65bc78  # 01:52     22+      1  Merge
tag 'sound-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
git bisect good 683b96f4d1d132fcefa4a0bd11916649800d7361  # 02:08     22+      2  Merge
branch 'next' of
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
git bisect good 218ed7503aee07c7758dcbdd782e8c1a25c9f1e9  # 02:22     22+      3 
radix-tree: improve dump output
git bisect good a57cb1c1d7974c62a5c80f7869e35b492ace12cd  # 02:40     22+      4  Merge
branch 'akpm' (patches from Andrew)
git bisect  bad 76481bf7b79d4d3470223f8f1c5f77dafb746057  # 02:58      0-     22  virtio:
provide a method to get the IRQ affinity mask for a virtqueue
git bisect good 819483d806f4324b42a25f8dd760735ae659141c  # 03:15     21+      3 
vsock/virtio: mark an internal function static
git bisect good b58235ea5794f29d200e4622dc09c1818f539b77  # 03:27     22+      0 
virtio_pci: split vp_try_to_find_vqs into INTx and MSI-X variants
git bisect  bad 3bf965f16c2f18eef77de7c59dbfc82f6577a3bb  # 03:50      0-      1 
virtio_pci: use msix_enable flag in struct pci_dev
git bisect  bad 563d3bbe444501ac1943d93c74f90460424e0af4  # 04:02      0-      2 
virtio_pci: use shared interrupts for virtqueues
# first bad commit: [563d3bbe444501ac1943d93c74f90460424e0af4] virtio_pci: use shared
interrupts for virtqueues
git bisect good b58235ea5794f29d200e4622dc09c1818f539b77  # 04:06     63+      9 
virtio_pci: split vp_try_to_find_vqs into INTx and MSI-X variants
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect  bad 563d3bbe444501ac1943d93c74f90460424e0af4  # 04:16      0-      4 
virtio_pci: use shared interrupts for virtqueues
# extra tests on HEAD of linux-devel/devel-catchup-201612152110
git bisect  bad 48c85573afde79fbf2e2666a826dd0af68d33fb7  # 04:16      0-     13  0day
head guard for 'devel-catchup-201612152110'
# extra tests on tree/branch vhost/vhost
git bisect  bad 31fc51a33593cf45e3df9aec514a8e26f76703a4  # 04:31      0-      1 
Makefile: drop -D__CHECK_ENDIAN__ from cflags
# extra tests on tree/branch linus/master
git bisect good 5cc60aeedf315a7513f92e98314e86d515b986d1  # 04:42     66+      7  Merge
tag 'xfs-for-linus-4.10-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
# extra tests on tree/branch linux-next/master
git bisect good df5462d601bec886f6c56b2a4f4e54d92761c2d5  # 04:57     66+     19  Add
linux-next specific files for 20161215


---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/lkp                          Intel Corporation

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[virtio_pci] 563d3bbe44: WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1478 __free_irq