------------[ cut here ]------------ WARNING: CPU: 0 PID: 5878 at net/mac80211/tx.c:4961 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4961 [inline] WARNING: CPU: 0 PID: 5878 at net/mac80211/tx.c:4961 __ieee80211_beacon_get+0xf78/0x12fc net/mac80211/tx.c:5362 Modules linked in: CPU: 0 PID: 5878 Comm: syz.3.323 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 42400005 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4961 [inline] pc : __ieee80211_beacon_get+0xf78/0x12fc net/mac80211/tx.c:5362 lr : __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4961 [inline] lr : __ieee80211_beacon_get+0xf78/0x12fc net/mac80211/tx.c:5362 sp : ffff800008007ae0 x29: ffff800008007b20 x28: ffff0000cbf98e80 x27: ffffffffffffe520 x26: 00000000ffffffff x25: ffff0000d688cc00 x24: ffff0000cb254658 x23: dfff800000000000 x22: ffff800008007b8c x21: ffff0000f602e228 x20: 0000000000000000 x19: ffff0000f602e760 x18: 0000000000000000 x17: ffff80018a0bd000 x16: ffff8000082dbd3c x15: 0000000000000000 x14: 0000000000000007 x13: 0000000000ff0100 x12: ffff800017c5d008 x11: ff00800011462380 x10: 0000000000000000 x9 : ffff800011462380 x8 : ffff0000d1679c00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80001146165c x2 : 000000000000000a x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4961 [inline] __ieee80211_beacon_get+0xf78/0x12fc net/mac80211/tx.c:5362 ieee80211_beacon_get_tim+0x70/0x44c net/mac80211/tx.c:5489 ieee80211_beacon_get include/net/mac80211.h:5335 [inline] mac80211_hwsim_beacon_tx+0x1e4/0x8fc drivers/net/wireless/mac80211_hwsim.c:2091 __iterate_interfaces+0x200/0x47c net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd4/0x180 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xc8/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1751 [inline] __hrtimer_run_queues+0x444/0xc58 kernel/time/hrtimer.c:1815 hrtimer_run_softirq+0x164/0x408 kernel/time/hrtimer.c:1832 handle_softirqs+0x318/0xc90 kernel/softirq.c:596 __do_softirq+0x14/0x20 kernel/softirq.c:630 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:897 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:477 [inline] __irq_exit_rcu+0x23c/0x430 kernel/softirq.c:679 irq_exit_rcu+0x14/0x84 kernel/softirq.c:691 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_restore+0x8/0x10 arch/arm64/include/asm/irqflags.h:122 lock_is_held include/linux/lockdep.h:283 [inline] __might_resched+0x98/0x4e0 kernel/sched/core.c:9932 __might_sleep+0x94/0x110 kernel/sched/core.c:9899 __might_fault+0x7c/0x124 mm/memory.c:5848 ____sys_recvmsg+0x318/0x754 net/socket.c:2751 ___sys_recvmsg net/socket.c:2780 [inline] do_recvmmsg+0x36c/0x9d8 net/socket.c:2874 __sys_recvmmsg net/socket.c:2953 [inline] __do_sys_recvmmsg net/socket.c:2976 [inline] __se_sys_recvmmsg net/socket.c:2969 [inline] __arm64_sys_recvmmsg+0x184/0x244 net/socket.c:2969 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 122435 hardirqs last enabled at (122434): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (122434): [] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194 hardirqs last disabled at (122435): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (121758): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (121758): [] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624 softirqs last disabled at (122431): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]--- ================================ WARNING: inconsistent lock state syzkaller #0 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. ksoftirqd/0/15 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff0000cb554130 (sk_lock-AF_X25){+.?.}-{0:0}, at: lock_sock include/net/sock.h:1805 [inline] ffff0000cb554130 (sk_lock-AF_X25){+.?.}-{0:0}, at: x25_kill_by_neigh+0x94/0x138 net/x25/af_x25.c:1781 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676 lock_sock_nested+0x70/0x130 net/core/sock.c:3505 lock_sock include/net/sock.h:1805 [inline] x25_bind+0x1b4/0x3d4 net/x25/af_x25.c:698 __sys_bind+0x1f8/0x2a4 net/socket.c:1811 __do_sys_bind net/socket.c:1822 [inline] __se_sys_bind net/socket.c:1820 [inline] __arm64_sys_bind+0x7c/0x94 net/socket.c:1820 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 1193246 hardirqs last enabled at (1193246): [] __local_bh_enable_ip+0x1f8/0x37c kernel/softirq.c:426 hardirqs last disabled at (1193245): [] __local_bh_enable_ip+0x178/0x37c kernel/softirq.c:403 softirqs last enabled at (1193194): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (1193194): [] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624 softirqs last disabled at (1193199): [] run_ksoftirqd+0x7c/0x2ac kernel/softirq.c:968 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sk_lock-AF_X25); lock(sk_lock-AF_X25); *** DEADLOCK *** 1 lock held by ksoftirqd/0/15: #0: ffff800015557440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x18/0x54 include/linux/rcupdate.h:349 stack backtrace: CPU: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_usage_bug+0x4c0/0x6dc kernel/locking/lockdep.c:3962 valid_state kernel/locking/lockdep.c:3974 [inline] mark_lock_irq+0x858/0xab8 kernel/locking/lockdep.c:-1 mark_lock+0x224/0x320 kernel/locking/lockdep.c:4633 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0xa88/0x6634 kernel/locking/lockdep.c:5017 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676 lock_sock_nested+0x70/0x130 net/core/sock.c:3505 lock_sock include/net/sock.h:1805 [inline] x25_kill_by_neigh+0x94/0x138 net/x25/af_x25.c:1781 x25_link_terminated+0x5c/0x78 net/x25/x25_link.c:257 x25_lapb_receive_frame+0x140/0xd0c net/x25/x25_dev.c:138 __netif_receive_skb_one_core net/core/dev.c:5619 [inline] netif_receive_skb_core+0x160/0x244 net/core/dev.c:5644 lapbeth_napi_poll+0x48/0xa0 drivers/net/wan/lapbether.c:99 __napi_poll+0xb8/0x3f4 net/core/dev.c:6628 napi_poll net/core/dev.c:6695 [inline] net_rx_action+0x52c/0xb5c net/core/dev.c:6809 handle_softirqs+0x318/0xc90 kernel/softirq.c:596 run_ksoftirqd+0x7c/0x2ac kernel/softirq.c:968 smpboot_thread_fn+0x4e8/0x960 kernel/smpboot.c:164 kthread+0x254/0x2e0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 BUG: sleeping function called from invalid context at net/core/sock.c:3507 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 15, name: ksoftirqd/0 preempt_count: 100, expected: 0 RCU nest depth: 1, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:434 [inline] [] handle_softirqs+0xe8/0xc90 kernel/softirq.c:572 CPU: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 __might_resched+0x354/0x4e0 kernel/sched/core.c:9970 __might_sleep+0x94/0x110 kernel/sched/core.c:9899 lock_sock_nested+0x80/0x130 net/core/sock.c:3507 lock_sock include/net/sock.h:1805 [inline] x25_kill_by_neigh+0x94/0x138 net/x25/af_x25.c:1781 x25_link_terminated+0x5c/0x78 net/x25/x25_link.c:257 x25_lapb_receive_frame+0x140/0xd0c net/x25/x25_dev.c:138 __netif_receive_skb_one_core net/core/dev.c:5619 [inline] netif_receive_skb_core+0x160/0x244 net/core/dev.c:5644 lapbeth_napi_poll+0x48/0xa0 drivers/net/wan/lapbether.c:99 __napi_poll+0xb8/0x3f4 net/core/dev.c:6628 napi_poll net/core/dev.c:6695 [inline] net_rx_action+0x52c/0xb5c net/core/dev.c:6809 handle_softirqs+0x318/0xc90 kernel/softirq.c:596 run_ksoftirqd+0x7c/0x2ac kernel/softirq.c:968 smpboot_thread_fn+0x4e8/0x960 kernel/smpboot.c:164 kthread+0x254/0x2e0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850