------------[ cut here ]------------
!cfg80211_chandef_valid(chandef)
WARNING: net/wireless/chan.c:796 at cfg80211_chandef_dfs_required+0xe06/0xec0 net/wireless/chan.c:796, CPU#1: syz.6.3028/16609
Modules linked in:
CPU: 1 UID: 0 PID: 16609 Comm: syz.6.3028 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:cfg80211_chandef_dfs_required+0xe06/0xec0 net/wireless/chan.c:796
Code: de e8 5e 0d c1 f6 48 83 fb 3f 0f 87 aa 00 00 00 e8 0f 09 c1 f6 b8 01 00 00 00 89 d9 48 d3 e0 e9 41 f4 ff ff e8 fb 08 c1 f6 90 <0f> 0b 90 b8 ea ff ff ff e9 2e f4 ff ff e8 d8 8f a4 00 89 d1 80 e1
RSP: 0018:ffffc9000dd57700 EFLAGS: 00010293
RAX: ffffffff8b04c405 RBX: ffff88802029d858 RCX: ffff8880279ddc40
RDX: 0000000000000000 RSI: 00000000fffffff8 RDI: 0000000000000005
RBP: ffffc9000dd57890 R08: ffffffff822634df R09: ffff8880b873f5e8
R10: dffffc0000000000 R11: ffffed100c1a8552 R12: 0000000000000006
R13: dffffc0000000000 R14: ffffc9000dd57a00 R15: dffffc0000000000
FS:  00007fa7bd0fd6c0(0000) GS:ffff888125388000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d06fa2e9c CR3: 0000000055e28000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000008d24
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 _ieee80211_link_use_channel+0x27a/0x7f0 net/mac80211/chan.c:2175
 ieee80211_link_use_channel net/mac80211/ieee80211_i.h:2786 [inline]
 ieee80211_set_monitor_channel+0x692/0x8e0 net/mac80211/cfg.c:1087
 rdev_set_monitor_channel net/wireless/rdev-ops.h:453 [inline]
 cfg80211_set_monitor_channel+0x22d/0x5f0 net/wireless/chan.c:1602
 cfg80211_wext_siwfreq+0x713/0x850 net/wireless/wext-compat.c:792
 ioctl_standard_call+0xcb/0x1b0 net/wireless/wext-core.c:1042
 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline]
 wext_ioctl_dispatch+0xee/0x410 net/wireless/wext-core.c:1013
 wext_handle_ioctl+0x10f/0x1d0 net/wireless/wext-core.c:1074
 sock_ioctl+0x159/0x7f0 net/socket.c:1366
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7bc19ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa7bd0fd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa7bc416090 RCX: 00007fa7bc19ce59
RDX: 00002000000000c0 RSI: 0000000000008b04 RDI: 0000000000000006
RBP: 00007fa7bc232d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7bc416128 R14: 00007fa7bc416090 R15: 00007ffebcedaac8
 </TASK>