Hello:
This patch was applied to bluetooth/bluetooth-next.git (master)
by Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>:
On Thu, 13 Jun 2024 21:30:43 -0400 you wrote:
> The syzbot fuzzer found that the interrupt-URB completion callback in
> the cdc-wdm driver was taking too long, and the driver's immediate
> resubmission of interrupt URBs with -EPROTO status combined with the
> dummy-hcd emulation to cause a CPU lockup:
>
>
> cdc_wdm 1-1:1.0: nonzero urb status received: -71
> cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes
> watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor782:6625]
> CPU#0 Utilization every 4s during lockup:
> #1: 98% system, 0% softirq, 3% hardirq, 0% idle
> #2: 98% system, 0% softirq, 3% hardirq, 0% idle
> #3: 98% system, 0% softirq, 3% hardirq, 0% idle
> #4: 98% system, 0% softirq, 3% hardirq, 0% idle
> #5: 98% system, 1% softirq, 3% hardirq, 0% idle
> Modules linked in:
> irq event stamp: 73096
> hardirqs last enabled at (73095): [<ffff80008037bc00>] console_emit_next_record kernel/printk/printk.c:2935 [inline]
> hardirqs last enabled at (73095): [<ffff80008037bc00>] console_flush_all+0x650/0xb74 kernel/printk/printk.c:2994
> hardirqs last disabled at (73096): [<ffff80008af10b00>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]
> hardirqs last disabled at (73096): [<ffff80008af10b00>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551
> softirqs last enabled at (73048): [<ffff8000801ea530>] softirq_handle_end kernel/softirq.c:400 [inline]
> softirqs last enabled at (73048): [<ffff8000801ea530>] handle_softirqs+0xa60/0xc34 kernel/softirq.c:582
> softirqs last disabled at (73043): [<ffff800080020de8>] __do_softirq+0x14/0x20 kernel/softirq.c:588
> CPU: 0 PID: 6625 Comm: syz-executor782 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
>
> [...]
Here is the summary with links:
- USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages
https://git.kernel.org/bluetooth/bluetooth-next/c/22f008128625
You are awesome, thank you!
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