Hello, syzbot found the following issue on: HEAD commit: 60ec7fcfe768 qlcnic: potential dereference null pointer of.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1390880db00000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa556098924b78f0 dashboard link: https://syzkaller.appspot.com/bug?extid=11c342e5e30e9539cabd compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10e0a349b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ef4733b00000 The issue was bisected to: commit 0985dba842eaa391858972cfe2724c3c174a2827 Author: David Woodhouse <dwmw@xxxxxxxxxxxx> Date: Sat Oct 23 19:47:19 2021 +0000 KVM: x86/xen: Fix kvm_xen_has_interrupt() sleeping in kvm_vcpu_block() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12f0cdd5b00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=11f0cdd5b00000 console output: https://syzkaller.appspot.com/x/log.txt?x=16f0cdd5b00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+11c342e5e30e9539cabd@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 0985dba842ea ("KVM: x86/xen: Fix kvm_xen_has_interrupt() sleeping in kvm_vcpu_block()") RSP: 002b:00007fff775e50d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f668292e069 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000002 R09: 00007fff775e5110 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff775e5100 R13: 000000000000000e R14: 00000000ffffffff R15: 0000000000000000 </TASK> ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3601 at net/mac80211/chan.c:1862 ieee80211_vif_release_channel+0x1ad/0x220 net/mac80211/chan.c:1862 net/mac80211/chan.c:1862 Modules linked in: CPU: 0 PID: 3601 Comm: syz-executor149 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ieee80211_vif_release_channel+0x1ad/0x220 net/mac80211/chan.c:1862 net/mac80211/chan.c:1862 Code: c1 ea 03 80 3c 02 00 0f 85 82 00 00 00 48 8b ab 10 06 00 00 e9 60 ff ff ff e8 ff 10 d6 f8 0f 0b e9 e2 fe ff ff e8 f3 10 d6 f8 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 RSP: 0018:ffffc900029ff350 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88801cf50c80 RCX: 0000000000000000 RDX: ffff88801d00ba00 RSI: ffffffff88a1a0dd RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff88a1a09c R11: 0000000000000000 R12: ffff88801cf51290 R13: 0000000000000001 R14: 00000000fffffff4 R15: 0000000000000000 FS: 0000555556cb8300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005643b512ad10 CR3: 000000001d4f5000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ieee80211_start_ap+0x1b16/0x2780 net/mac80211/cfg.c:1267 net/mac80211/cfg.c:1267 rdev_start_ap net/wireless/rdev-ops.h:158 [inline] rdev_start_ap net/wireless/rdev-ops.h:158 [inline] net/wireless/nl80211.c:5718 nl80211_start_ap+0x288d/0x3dd0 net/wireless/nl80211.c:5718 net/wireless/nl80211.c:5718 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] net/netlink/genetlink.c:792 genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2496 net/netlink/af_netlink.c:2496 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] net/netlink/af_netlink.c:1345 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1921 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg_nosec net/socket.c:704 [inline] net/socket.c:724 sock_sendmsg+0xcf/0x120 net/socket.c:724 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 net/socket.c:2463 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f668292e069 Code: 97 01 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff775e50d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f668292e069 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000002 R09: 00007fff775e5110 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff775e5100 R13: 000000000000000e R14: 00000000ffffffff R15: 0000000000000000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
