* [moderation/CI] Re: nfc: llcp: Fix race condition in accept_queue lifecycle
@ 2026-08-26 10:02 syzbot ci
2026-08-26 10:10 ` Aleksandr Nogikh
0 siblings, 1 reply; 2+ messages in thread
From: syzbot ci @ 2026-08-26 10:02 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v2] nfc: llcp: Fix race condition in accept_queue lifecycle
https://lore.kernel.org/all/20260826075703.2400467-1-lee@kernel.org
* [PATCH v2 1/1] nfc: llcp: Fix race condition in accept_queue lifecycle
and found the following issue:
WARNING in __alloc_workqueue
Full report is available here:
https://ci.syzbot.org/series/6f4e9aed-2eea-44c2-8ef0-04ce578d399f
***
WARNING in __alloc_workqueue
tree: linux-next
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next
base: a8406e6c0b793ce0788019683837c40855b55995
arch: amd64
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
config: https://ci.syzbot.org/builds/3abfab5f-31c6-4773-9338-bbe1caeca14d/config
pci 0000:00:1f.2: [8086:2922] type 00 class 0x010601 conventional PCI endpoint
pci 0000:00:1f.2: BAR 4 [io 0xc0a0-0xc0bf]
pci 0000:00:1f.2: BAR 5 [mem 0xfebf2000-0xfebf2fff]
pci 0000:00:1f.3: [8086:2930] type 00 class 0x0c0500 conventional PCI endpoint
pci 0000:00:1f.3: BAR 4 [io 0x0700-0x073f]
ACPI: PCI: Interrupt link LNKA configured for IRQ 10
ACPI: PCI: Interrupt link LNKB configured for IRQ 10
ACPI: PCI: Interrupt link LNKC configured for IRQ 11
ACPI: PCI: Interrupt link LNKD configured for IRQ 11
ACPI: PCI: Interrupt link LNKE configured for IRQ 10
ACPI: PCI: Interrupt link LNKF configured for IRQ 10
ACPI: PCI: Interrupt link LNKG configured for IRQ 11
ACPI: PCI: Interrupt link LNKH configured for IRQ 11
ACPI: PCI: Interrupt link GSIA configured for IRQ 16
ACPI: PCI: Interrupt link GSIB configured for IRQ 17
ACPI: PCI: Interrupt link GSIC configured for IRQ 18
ACPI: PCI: Interrupt link GSID configured for IRQ 19
ACPI: PCI: Interrupt link GSIE configured for IRQ 20
ACPI: PCI: Interrupt link GSIF configured for IRQ 21
ACPI: PCI: Interrupt link GSIG configured for IRQ 22
ACPI: PCI: Interrupt link GSIH configured for IRQ 23
iommu: Default domain type: Translated
iommu: DMA domain TLB invalidation policy: lazy mode
SCSI subsystem initialized
ACPI: bus type USB registered
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
mc: Linux media interface: v0.10
videodev: Linux video capture interface: v2.00
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
Advanced Linux Sound Architecture Driver Initialized.
Bluetooth: Core ver 2.22
Bluetooth: Core ver 2.22
NET: Registered PF_BLUETOOTH protocol family
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
NET: Registered PF_ATMPVC protocol family
NetLabel: Initializing
NetLabel: domain hash size = 128
NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
NetLabel: unlabeled traffic allowed by default
nfc: nfc_init: NFC Core ver 0.1
------------[ cut here ]------------
workqueue: nfc_llcp_wq is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
WARNING: kernel/workqueue.c:5939 at __alloc_workqueue+0x1cd2/0x1fe0, CPU#1: swapper/0/1
Modules linked in:
CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__alloc_workqueue+0x1cd5/0x1fe0
Code: 0b 90 e9 6d fc ff ff e8 f9 f0 38 00 e9 7f fb ff ff e8 ef f0 38 00 e9 85 fb ff ff e8 e5 f0 38 00 48 8d 3d 3e 1a ee 0e 4c 89 f6 <67> 48 0f b9 3a 41 81 cf 00 01 00 00 e9 10 e6 ff ff e8 c5 f0 38 00
RSP: 0000:ffffc90000067788 EFLAGS: 00010293
RAX: ffffffff818ecbbb RBX: 0000000000000000 RCX: ffff888102adda00
RDX: 0000000000000000 RSI: ffff8881680b0d70 RDI: ffffffff907ce600
RBP: ffffffff8d4e3fa0 R08: ffff888102adda00 R09: 0000000000000002
R10: 0000000000000102 R11: 0000000000000000 R12: ffff8881680b0c00
R13: ffff8881680b0c00 R14: ffff8881680b0d70 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8882a8ce0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000eb48000 CR4: 00000000000006f0
Call Trace:
<TASK>
alloc_workqueue_noprof+0xe3/0x210
nfc_llcp_init+0x15/0x50
nfc_init+0x74/0xa0
do_one_initcall+0x250/0x870
do_initcall_level+0x10a/0x1a0
do_initcalls+0x59/0xa0
kernel_init_freeable+0x29d/0x3e0
kernel_init+0x22/0x1d0
ret_from_fork+0x514/0xb70
ret_from_fork_asm+0x1a/0x30
</TASK>
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
To test a fix for this bug, please reply with `#syz test`
(on a separate line) and attach the patch to the email.
Notes:
- The patch will be applied on top of the tested series (as an
incremental fix).
- To test a new version of the whole series, please send it directly
to syzbot@lists.linux.dev.
- Arguments like custom git repos and branches are not supported.
The email will later be sent to:
[davem@davemloft.net david@ixit.cz edumazet@google.com horms@kernel.org kuba@kernel.org lee@kernel.org linux-kernel@vger.kernel.org netdev@vger.kernel.org oe-linux-nfc@lists.linux.dev pabeni@redhat.com sameo@linux.intel.com szymon.janc@tieto.com]
If the report looks fine to you, reply with:
#syz upstream
If the report is a false positive, reply with
#syz invalid
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [moderation/CI] Re: nfc: llcp: Fix race condition in accept_queue lifecycle
2026-08-26 10:02 [moderation/CI] Re: nfc: llcp: Fix race condition in accept_queue lifecycle syzbot ci
@ 2026-08-26 10:10 ` Aleksandr Nogikh
0 siblings, 0 replies; 2+ messages in thread
From: Aleksandr Nogikh @ 2026-08-26 10:10 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Wed, Aug 26, 2026 at 12:02 PM syzbot ci
<syzbot+ci0ac53bc2df24efd0@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v2] nfc: llcp: Fix race condition in accept_queue lifecycle
> https://lore.kernel.org/all/20260826075703.2400467-1-lee@kernel.org
> * [PATCH v2 1/1] nfc: llcp: Fix race condition in accept_queue lifecycle
>
> and found the following issue:
> WARNING in __alloc_workqueue
>
> Full report is available here:
> https://ci.syzbot.org/series/6f4e9aed-2eea-44c2-8ef0-04ce578d399f
>
> ***
>
> WARNING in __alloc_workqueue
>
> tree: linux-next
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next
> base: a8406e6c0b793ce0788019683837c40855b55995
> arch: amd64
> compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
> config: https://ci.syzbot.org/builds/3abfab5f-31c6-4773-9338-bbe1caeca14d/config
>
> pci 0000:00:1f.2: [8086:2922] type 00 class 0x010601 conventional PCI endpoint
> pci 0000:00:1f.2: BAR 4 [io 0xc0a0-0xc0bf]
> pci 0000:00:1f.2: BAR 5 [mem 0xfebf2000-0xfebf2fff]
> pci 0000:00:1f.3: [8086:2930] type 00 class 0x0c0500 conventional PCI endpoint
> pci 0000:00:1f.3: BAR 4 [io 0x0700-0x073f]
> ACPI: PCI: Interrupt link LNKA configured for IRQ 10
> ACPI: PCI: Interrupt link LNKB configured for IRQ 10
> ACPI: PCI: Interrupt link LNKC configured for IRQ 11
> ACPI: PCI: Interrupt link LNKD configured for IRQ 11
> ACPI: PCI: Interrupt link LNKE configured for IRQ 10
> ACPI: PCI: Interrupt link LNKF configured for IRQ 10
> ACPI: PCI: Interrupt link LNKG configured for IRQ 11
> ACPI: PCI: Interrupt link LNKH configured for IRQ 11
> ACPI: PCI: Interrupt link GSIA configured for IRQ 16
> ACPI: PCI: Interrupt link GSIB configured for IRQ 17
> ACPI: PCI: Interrupt link GSIC configured for IRQ 18
> ACPI: PCI: Interrupt link GSID configured for IRQ 19
> ACPI: PCI: Interrupt link GSIE configured for IRQ 20
> ACPI: PCI: Interrupt link GSIF configured for IRQ 21
> ACPI: PCI: Interrupt link GSIG configured for IRQ 22
> ACPI: PCI: Interrupt link GSIH configured for IRQ 23
> iommu: Default domain type: Translated
> iommu: DMA domain TLB invalidation policy: lazy mode
> SCSI subsystem initialized
> ACPI: bus type USB registered
> usbcore: registered new interface driver usbfs
> usbcore: registered new interface driver hub
> usbcore: registered new device driver usb
> mc: Linux media interface: v0.10
> videodev: Linux video capture interface: v2.00
> pps_core: LinuxPPS API ver. 1 registered
> pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
> PTP clock support registered
> EDAC MC: Ver: 3.0.0
> Advanced Linux Sound Architecture Driver Initialized.
> Bluetooth: Core ver 2.22
> Bluetooth: Core ver 2.22
> NET: Registered PF_BLUETOOTH protocol family
> Bluetooth: HCI device and connection manager initialized
> Bluetooth: HCI socket layer initialized
> Bluetooth: L2CAP socket layer initialized
> Bluetooth: SCO socket layer initialized
> NET: Registered PF_ATMPVC protocol family
> NetLabel: Initializing
> NetLabel: domain hash size = 128
> NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
> NetLabel: unlabeled traffic allowed by default
> nfc: nfc_init: NFC Core ver 0.1
> ------------[ cut here ]------------
> workqueue: nfc_llcp_wq is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
> WARNING: kernel/workqueue.c:5939 at __alloc_workqueue+0x1cd2/0x1fe0, CPU#1: swapper/0/1
> Modules linked in:
> CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> RIP: 0010:__alloc_workqueue+0x1cd5/0x1fe0
> Code: 0b 90 e9 6d fc ff ff e8 f9 f0 38 00 e9 7f fb ff ff e8 ef f0 38 00 e9 85 fb ff ff e8 e5 f0 38 00 48 8d 3d 3e 1a ee 0e 4c 89 f6 <67> 48 0f b9 3a 41 81 cf 00 01 00 00 e9 10 e6 ff ff e8 c5 f0 38 00
> RSP: 0000:ffffc90000067788 EFLAGS: 00010293
> RAX: ffffffff818ecbbb RBX: 0000000000000000 RCX: ffff888102adda00
> RDX: 0000000000000000 RSI: ffff8881680b0d70 RDI: ffffffff907ce600
> RBP: ffffffff8d4e3fa0 R08: ffff888102adda00 R09: 0000000000000002
> R10: 0000000000000102 R11: 0000000000000000 R12: ffff8881680b0c00
> R13: ffff8881680b0c00 R14: ffff8881680b0d70 R15: 0000000000000000
> FS: 0000000000000000(0000) GS:ffff8882a8ce0000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000000 CR3: 000000000eb48000 CR4: 00000000000006f0
> Call Trace:
> <TASK>
> alloc_workqueue_noprof+0xe3/0x210
> nfc_llcp_init+0x15/0x50
> nfc_init+0x74/0xa0
> do_one_initcall+0x250/0x870
> do_initcall_level+0x10a/0x1a0
> do_initcalls+0x59/0xa0
> kernel_init_freeable+0x29d/0x3e0
> kernel_init+0x22/0x1d0
> ret_from_fork+0x514/0xb70
> ret_from_fork_asm+0x1a/0x30
> </TASK>
>
>
> ***
>
> If these findings have caused you to resend the series or submit a
> separate fix, please add the following tag to your commit message:
> Tested-by: syzbot@syzkaller.appspotmail.com
>
> ---
> This report is generated by a bot. It may contain errors.
> syzbot ci engineers can be reached at syzkaller@googlegroups.com.
>
> To test a fix for this bug, please reply with `#syz test`
> (on a separate line) and attach the patch to the email.
>
> Notes:
> - The patch will be applied on top of the tested series (as an
> incremental fix).
> - To test a new version of the whole series, please send it directly
> to syzbot@lists.linux.dev.
> - Arguments like custom git repos and branches are not supported.
>
> The email will later be sent to:
> [davem@davemloft.net david@ixit.cz edumazet@google.com horms@kernel.org kuba@kernel.org lee@kernel.org linux-kernel@vger.kernel.org netdev@vger.kernel.org oe-linux-nfc@lists.linux.dev pabeni@redhat.com sameo@linux.intel.com szymon.janc@tieto.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> If the report is a false positive, reply with
> #syz invalid
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-08-26 10:02 [moderation/CI] Re: nfc: llcp: Fix race condition in accept_queue lifecycle syzbot ci
2026-08-26 10:10 ` Aleksandr Nogikh
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