kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 30335 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 net/mac80211/chan.c:20 Code: e0 f7 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 01 a0 bc f9 48 8d bb 20 08 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 61 48 8b 83 20 08 00 00 48 8d 98 e0 f7 ff ff 48 RSP: 0018:ffff8880a30873e8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: deacfffffffff8e0 RCX: ffffc90006122000 RDX: 000000000000161e RSI: ffffffff87a5e56f RDI: dead000000000100 RBP: ffff8880b04c7720 R08: ffff888056f65e68 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff8880b04c7700 R15: 0000000000000000 FS: 00007efeac3a7700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ee2e000 CR3: 0000000053aed000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_assign_vif_chanctx+0x73c/0x1590 net/mac80211/chan.c:676 __ieee80211_vif_release_channel+0x22f/0x420 net/mac80211/chan.c:1543 ieee80211_vif_release_channel+0x10a/0x1e0 net/mac80211/chan.c:1757 ieee80211_ibss_disconnect+0x5a0/0xe40 net/mac80211/ibss.c:744 ieee80211_ibss_leave+0x12/0x150 net/mac80211/ibss.c:1858 rdev_leave_ibss net/wireless/rdev-ops.h:531 [inline] __cfg80211_leave_ibss+0x191/0x7c0 net/wireless/ibss.c:206 cfg80211_leave_ibss+0x54/0x70 net/wireless/ibss.c:224 cfg80211_change_iface+0xec8/0x1520 net/wireless/util.c:956 nl80211_set_interface+0x661/0x830 net/wireless/nl80211.c:3205 genl_family_rcv_msg+0x642/0xc40 net/netlink/genetlink.c:602 genl_rcv_msg+0xbf/0x160 net/netlink/genetlink.c:627 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7efeada345f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efeac3a7168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007efeadb54f80 RCX: 00007efeada345f9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000005 RBP: 00007efeada8f7b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecea5a05f R14: 00007efeac3a7300 R15: 0000000000022000 Modules linked in: ---[ end trace 8752ff546e67c635 ]--- RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 net/mac80211/chan.c:20 Code: e0 f7 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 01 a0 bc f9 48 8d bb 20 08 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 61 48 8b 83 20 08 00 00 48 8d 98 e0 f7 ff ff 48 RSP: 0018:ffff8880a30873e8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: deacfffffffff8e0 RCX: ffffc90006122000 RDX: 000000000000161e RSI: ffffffff87a5e56f RDI: dead000000000100 RBP: ffff8880b04c7720 R08: ffff888056f65e68 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff8880b04c7700 R15: 0000000000000000 FS: 00007efeac3a7700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feade012000 CR3: 0000000053aed000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 48 39 c5 cmp %rax,%rbp 3: 74 3b je 0x40 5: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 c: fc ff df f: e8 01 a0 bc f9 callq 0xf9bca015 14: 48 8d bb 20 08 00 00 lea 0x820(%rbx),%rdi 1b: 41 83 c4 01 add $0x1,%r12d 1f: 48 89 f8 mov %rdi,%rax 22: 48 c1 e8 03 shr $0x3,%rax * 26: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2b: 75 61 jne 0x8e 2d: 48 8b 83 20 08 00 00 mov 0x820(%rbx),%rax 34: 48 8d 98 e0 f7 ff ff lea -0x820(%rax),%rbx 3b: 48 rex.W