------------[ cut here ]------------ wlan1: Failed check-sdata-in-driver check, flags: 0x0 WARNING: CPU: 2 PID: 772 at net/mac80211/driver-ops.c:366 drv_unassign_vif_chanctx+0x247/0x850 net/mac80211/driver-ops.c:366 Modules linked in: CPU: 2 UID: 0 PID: 772 Comm: syz.3.4709 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:drv_unassign_vif_chanctx+0x247/0x850 net/mac80211/driver-ops.c:366 Code: 74 24 10 48 81 c6 20 01 00 00 48 89 74 24 10 e8 ff 5f bc f6 8b 54 24 04 48 8b 74 24 10 48 c7 c7 c0 ae 08 8d e8 2a 57 7b f6 90 <0f> 0b 90 90 e8 e0 5f bc f6 4c 89 f2 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffffc90003e678a8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88805f040d80 RCX: ffffc9000c701000 RDX: 0000000000080000 RSI: ffffffff817a0305 RDI: 0000000000000001 RBP: ffff88806d108e40 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805f042a28 R13: 0000000000000000 R14: ffff88805f041728 R15: ffff88805f0429d0 FS: 0000000000000000(0000) GS:ffff8880976ba000(0063) knlGS:00000000f54ceb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73ba804 CR3: 0000000059b6b000 CR4: 0000000000352ef0 Call Trace: ieee80211_assign_link_chanctx+0x3f1/0xf00 net/mac80211/chan.c:916 __ieee80211_link_release_channel+0x273/0x4b0 net/mac80211/chan.c:1890 ieee80211_link_release_channel+0x128/0x200 net/mac80211/chan.c:2165 ieee80211_if_change_type+0x2b0/0x800 net/mac80211/iface.c:2012 ieee80211_change_iface+0xa5/0x500 net/mac80211/cfg.c:254 rdev_change_virtual_intf net/wireless/rdev-ops.h:74 [inline] cfg80211_change_iface+0x582/0xdc0 net/wireless/util.c:1265 cfg80211_wext_siwmode+0x22c/0x2b0 net/wireless/wext-compat.c:66 ioctl_standard_call+0xb5/0x1d0 net/wireless/wext-core.c:1043 compat_standard_call+0xf2/0x350 net/wireless/wext-core.c:1101 wireless_process_ioctl.constprop.0+0x28e/0x3d0 net/wireless/wext-core.c:981 wext_ioctl_dispatch net/wireless/wext-core.c:1014 [inline] wext_ioctl_dispatch net/wireless/wext-core.c:1002 [inline] compat_wext_handle_ioctl+0x284/0x310 net/wireless/wext-core.c:1137 compat_sock_ioctl+0x320/0x730 net/socket.c:3552 __do_compat_sys_ioctl fs/ioctl.c:696 [inline] __se_compat_sys_ioctl fs/ioctl.c:639 [inline] __ia32_compat_sys_ioctl+0x23f/0x370 fs/ioctl.c:639 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x7c/0x300 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf70de579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f54ce55c EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000008b06 RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi