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Wang Liang 34171b9e53 net: bridge: fix soft lockup in br_multicast_query_expired() [ Upstream commit `d1547bf460` ] 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> This issue can be reproduced with: ip link add br0 type bridge echo 1 > /sys/class/net/br0/bridge/multicast_querier echo 0xffffffffffffffff > /sys/class/net/br0/bridge/multicast_query_interval ip link set dev br0 up The multicast_startup_query_interval can also cause this issue. Similar to the commit `99b4061095` ("net: bridge: mcast: add and enforce query interval minimum"), add check for the query interval maximum to fix this issue. Link: https://lore.kernel.org/netdev/20250806094941.1285944-1-wangliang74@huawei.com/ Link: https://lore.kernel.org/netdev/20250812091818.542238-1-wangliang74@huawei.com/ Fixes: `d902eee43f` ("bridge: Add multicast count/interval sysfs entries") Suggested-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Wang Liang <wangliang74@huawei.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Acked-by: Nikolay Aleksandrov <razor@blackwall.org> Link: https://patch.msgid.link/20250813021054.1643649-1-wangliang74@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-08-28 16:24:37 +02:00
arch	x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper	2025-08-28 16:24:37 +02:00
block	block: avoid possible overflow for chunk_sectors check in blk_stack_limits()	2025-08-28 16:24:25 +02:00
certs
crypto
Documentation	asm-generic: Add memory barrier dma_mb()	2025-08-28 16:24:36 +02:00
drivers	RDMA/bnxt_re: Fix to initialize the PBL array	2025-08-28 16:24:37 +02:00
fs	f2fs: fix to avoid out-of-boundary access in dnode page	2025-08-28 16:24:36 +02:00
include	mm/page_alloc: detect allocation forbidden by cpuset and bail out early	2025-08-28 16:24:37 +02:00
init
io_uring
ipc
kernel	cgroup/cpuset: Use static_branch_enable_cpuslocked() on cpusets_insane_config_key	2025-08-28 16:24:37 +02:00
lib	lib: bitmap: Introduce node-aware alloc API	2025-08-28 16:24:02 +02:00
LICENSES
mm	mm/page_alloc: detect allocation forbidden by cpuset and bail out early	2025-08-28 16:24:37 +02:00
net	net: bridge: fix soft lockup in br_multicast_query_expired()	2025-08-28 16:24:37 +02:00
samples	samples: mei: Fix building on musl libc	2025-08-28 16:24:07 +02:00
scripts	kconfig: lxdialog: fix 'space' to (de)select options	2025-08-28 16:24:25 +02:00
security	securityfs: don't pin dentries twice, once is enough...	2025-08-28 16:24:17 +02:00
sound	ALSA: hda/realtek: Add support for HP EliteBook x360 830 G6 and EliteBook 830 G6	2025-08-28 16:24:34 +02:00
tools	selftests: mptcp: pm: check flush doesn't reset limits	2025-08-28 16:24:37 +02:00
usr
virt
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.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
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Makefile	kbuild: userprogs: use correct linker when mixing clang and GNU ld	2025-08-28 16:24:33 +02:00
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