------------[ cut here ]------------ wlan0: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.c:366 at drv_unassign_vif_chanctx+0x1ef/0x820 net/mac80211/driver-ops.c:366, CPU#2: syz.7.2223/11745 Modules linked in: CPU: 2 UID: 0 PID: 11745 Comm: syz.7.2223 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:drv_unassign_vif_chanctx+0x1f7/0x820 net/mac80211/driver-ops.c:366 Code: 00 00 e8 fc 80 df f6 48 8b 34 24 48 81 c6 20 01 00 00 48 89 34 24 e8 e8 80 df f6 48 8d 3d 41 60 28 06 8b 54 24 0c 48 8b 34 24 <67> 48 0f b9 3a eb 07 4c 8d b3 68 0a 00 00 e8 c6 80 df f6 4c 89 f2 RSP: 0018:ffffc900043ef0e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888026f28ec0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888026f28120 RDI: ffffffff91538f90 RBP: ffff888023ac0f40 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888026f2af88 R13: ffff8880558a6000 R14: ffff888026f29928 R15: ffff888026f2ac70 FS: 00007fa603bce6c0(0000) GS:ffff8880d5dd1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa602d89240 CR3: 0000000055c3f000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000009 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: ieee80211_assign_link_chanctx+0x5ec/0xeb0 net/mac80211/chan.c:1199 __ieee80211_link_release_channel+0x2f8/0x5b0 net/mac80211/chan.c:2176 ieee80211_link_release_channel+0x128/0x200 net/mac80211/chan.c:2492 ieee80211_teardown_sdata+0xc4/0x250 net/mac80211/iface.c:916 ieee80211_if_change_type+0x29f/0x790 net/mac80211/iface.c:2088 ieee80211_change_iface+0xad/0x920 net/mac80211/cfg.c:271 rdev_change_virtual_intf net/wireless/rdev-ops.h:74 [inline] cfg80211_change_iface+0x569/0xdf0 net/wireless/util.c:1259 nl80211_set_interface+0x875/0xc80 net/wireless/nl80211.c:5103 genl_family_rcv_msg_doit+0x214/0x300 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x560/0x800 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2709 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2763 __sys_sendmsg+0x160/0x210 net/socket.c:2795 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa602d9e0d9 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:00007fa603bce028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa603025fa0 RCX: 00007fa602d9e0d9 RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000003 RBP: 00007fa602e35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa603026038 R14: 00007fa603025fa0 R15: 00007fffede81288 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 fc 80 df f6 call 0xf6df8103 7: 48 8b 34 24 mov (%rsp),%rsi b: 48 81 c6 20 01 00 00 add $0x120,%rsi 12: 48 89 34 24 mov %rsi,(%rsp) 16: e8 e8 80 df f6 call 0xf6df8103 1b: 48 8d 3d 41 60 28 06 lea 0x6286041(%rip),%rdi # 0x6286063 22: 8b 54 24 0c mov 0xc(%rsp),%edx 26: 48 8b 34 24 mov (%rsp),%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: eb 07 jmp 0x38 31: 4c 8d b3 68 0a 00 00 lea 0xa68(%rbx),%r14 38: e8 c6 80 df f6 call 0xf6df8103 3d: 4c 89 f2 mov %r14,%rdx