Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:
On Wed, 13 Aug 2025 10:10:54 +0800 you wrote:
> When set multicast_query_interval to a large value, the local variable
> 'time' in br_multicast_send_query() may overflow. If the time is smaller
> than jiffies, the timer will expire immediately, and then call mod_timer()
> again, which creates a loop and may trigger the following soft lockup
> issue.
>
> watchdog: BUG: soft lockup - CPU#1 stuck for 221s! [rb_consumer:66]
> CPU: 1 UID: 0 PID: 66 Comm: rb_consumer Not tainted 6.16.0+ #259 PREEMPT(none)
> Call Trace:
> <IRQ>
> __netdev_alloc_skb+0x2e/0x3a0
> br_ip6_multicast_alloc_query+0x212/0x1b70
> __br_multicast_send_query+0x376/0xac0
> br_multicast_send_query+0x299/0x510
> br_multicast_query_expired.constprop.0+0x16d/0x1b0
> call_timer_fn+0x3b/0x2a0
> __run_timers+0x619/0x950
> run_timer_softirq+0x11c/0x220
> handle_softirqs+0x18e/0x560
> __irq_exit_rcu+0x158/0x1a0
> sysvec_apic_timer_interrupt+0x76/0x90
> </IRQ>
>
> [...]
Here is the summary with links:
- [net,v3] net: bridge: fix soft lockup in br_multicast_query_expired()
https://git.kernel.org/netdev/net/c/d1547bf460ba
You are awesome, thank you!
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