------------[ cut here ]------------ WARNING: CPU: 1 PID: 3491 at net/mac80211/chan.c:92 ieee80211_chanctx_reserved_chandef net/mac80211/chan.c:90 [inline] WARNING: CPU: 1 PID: 3491 at net/mac80211/chan.c:92 ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1422 [inline] WARNING: CPU: 1 PID: 3491 at net/mac80211/chan.c:92 ieee80211_vif_use_reserved_switch+0x10e8/0x28f0 net/mac80211/chan.c:1638 Modules linked in: CPU: 1 PID: 3491 Comm: kworker/u4:8 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: phy5 ieee80211_csa_finalize_work RIP: 0010:ieee80211_chanctx_reserved_chandef net/mac80211/chan.c:92 [inline] RIP: 0010:ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1422 [inline] RIP: 0010:ieee80211_vif_use_reserved_switch+0x10e8/0x28f0 net/mac80211/chan.c:1638 Code: 48 89 df e8 fa 70 d7 f7 e9 dc fc ff ff e8 20 42 7f f7 eb 24 e8 19 42 7f f7 c7 04 24 f4 ff ff ff e9 e4 f5 ff ff e8 08 42 7f f7 <0f> 0b 0f 0b e9 cf f5 ff ff e8 fa 41 7f f7 48 8b 7c 24 08 4c 8b 7c RSP: 0018:ffffc9000cea79c0 EFLAGS: 00010293 RAX: ffffffff8a07d65e RBX: 0000000000000001 RCX: ffff88802df50000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffff88805d1b15af R09: 1ffff1100ba362b5 R10: dffffc0000000000 R11: ffffed100ba362b6 R12: 0000000000000001 R13: ffff88805d1b25d9 R14: ffff88805d172c70 R15: ffff88805d172ce8 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4660417dac CR3: 0000000065d67000 CR4: 00000000003506e0 Call Trace: ieee80211_link_use_reserved_context+0x383/0x5c0 net/mac80211/chan.c:1927 __ieee80211_csa_finalize net/mac80211/cfg.c:3669 [inline] ieee80211_csa_finalize+0x5a6/0xf20 net/mac80211/cfg.c:3708 ieee80211_csa_finalize_work+0xf6/0x140 net/mac80211/cfg.c:3733 process_one_work kernel/workqueue.c:2653 [inline] process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 irq event stamp: 3540653 hardirqs last enabled at (3540655): [] vprintk_store+0xa33/0xda0 kernel/printk/printk.c:2297 hardirqs last disabled at (3540656): [] vprintk_store+0x190/0xda0 kernel/printk/printk.c:2206 softirqs last enabled at (3540628): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last enabled at (3540628): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last enabled at (3540628): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 softirqs last disabled at (3540321): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last disabled at (3540321): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last disabled at (3540321): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 3491 at net/mac80211/chan.c:1423 ieee80211_chanctx_reserved_chandef net/mac80211/chan.c:92 [inline] WARNING: CPU: 1 PID: 3491 at net/mac80211/chan.c:1423 ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1422 [inline] WARNING: CPU: 1 PID: 3491 at net/mac80211/chan.c:1423 ieee80211_vif_use_reserved_switch+0x10ea/0x28f0 net/mac80211/chan.c:1638 Modules linked in: CPU: 1 PID: 3491 Comm: kworker/u4:8 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: phy5 ieee80211_csa_finalize_work RIP: 0010:ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1423 [inline] RIP: 0010:ieee80211_vif_use_reserved_switch+0x10ea/0x28f0 net/mac80211/chan.c:1638 Code: df e8 fa 70 d7 f7 e9 dc fc ff ff e8 20 42 7f f7 eb 24 e8 19 42 7f f7 c7 04 24 f4 ff ff ff e9 e4 f5 ff ff e8 08 42 7f f7 0f 0b <0f> 0b e9 cf f5 ff ff e8 fa 41 7f f7 48 8b 7c 24 08 4c 8b 7c 24 30 RSP: 0018:ffffc9000cea79c0 EFLAGS: 00010293 RAX: ffffffff8a07d65e RBX: 0000000000000001 RCX: ffff88802df50000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffff88805d1b15af R09: 1ffff1100ba362b5 R10: dffffc0000000000 R11: ffffed100ba362b6 R12: 0000000000000001 R13: ffff88805d1b25d9 R14: ffff88805d172c70 R15: ffff88805d172ce8 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2d34ff0e9c CR3: 000000002b9c5000 CR4: 00000000003506e0 Call Trace: ieee80211_link_use_reserved_context+0x383/0x5c0 net/mac80211/chan.c:1927 __ieee80211_csa_finalize net/mac80211/cfg.c:3669 [inline] ieee80211_csa_finalize+0x5a6/0xf20 net/mac80211/cfg.c:3708 ieee80211_csa_finalize_work+0xf6/0x140 net/mac80211/cfg.c:3733 process_one_work kernel/workqueue.c:2653 [inline] process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 irq event stamp: 3540911 hardirqs last enabled at (3540913): [] vprintk_store+0xa33/0xda0 kernel/printk/printk.c:2297 hardirqs last disabled at (3540914): [] vprintk_store+0x190/0xda0 kernel/printk/printk.c:2206 softirqs last enabled at (3540828): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last enabled at (3540828): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last enabled at (3540828): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 softirqs last disabled at (3540673): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last disabled at (3540673): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last disabled at (3540673): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 ---[ end trace 0000000000000000 ]--- wlan0: failed to finalize CSA, disconnecting