Hello, syzbot found the following issue on: HEAD commit: 2172e358 Add linux-next specific files for 20201002 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=176b55c0500000 kernel config: https://syzkaller.appspot.com/x/.config?x=70698f530a7e856f dashboard link: https://syzkaller.appspot.com/bug?extid=00ce7332120071df39b1 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+00ce7332120071df39b1@xxxxxxxxxxxxxxxxxxxxxxxxx mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium general protection fault, probably for non-canonical address 0xfbd59c0000000020: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xdead000000000100-0xdead000000000107] CPU: 1 PID: 13099 Comm: syz-executor.2 Not tainted 5.9.0-rc7-next-20201002-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x140 net/mac80211/chan.c:21 Code: a8 f6 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 e1 64 b0 f9 48 8d bb 58 09 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 68 48 8b 83 58 09 00 00 48 8d 98 a8 f6 ff ff 48 RSP: 0018:ffffc900167873f8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: deacfffffffff7a8 RCX: ffffc9000e597000 RDX: 0000000000040000 RSI: ffffffff87c4e20f RDI: dead000000000100 RBP: ffff8880a7738020 R08: 0000000000000000 R09: ffffffff8bb59e0f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff8880a7738000 R15: 0000000000000000 FS: 00007f95513db700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000050a070 CR3: 00000000a695e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ieee80211_assign_vif_chanctx+0x7b8/0x1230 net/mac80211/chan.c:690 __ieee80211_vif_release_channel+0x236/0x430 net/mac80211/chan.c:1557 ieee80211_vif_release_channel+0x117/0x220 net/mac80211/chan.c:1771 ieee80211_ibss_disconnect+0x44e/0x7b0 net/mac80211/ibss.c:735 ieee80211_ibss_leave+0x12/0xe0 net/mac80211/ibss.c:1871 rdev_leave_ibss net/wireless/rdev-ops.h:545 [inline] __cfg80211_leave_ibss+0x19a/0x4c0 net/wireless/ibss.c:212 cfg80211_leave_ibss+0x57/0x80 net/wireless/ibss.c:230 cfg80211_change_iface+0x855/0xef0 net/wireless/util.c:1012 nl80211_set_interface+0x65c/0x8d0 net/wireless/nl80211.c:3775 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline] genl_rcv_msg+0x61d/0x980 net/netlink/genetlink.c:731 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2489 genl_rcv+0x24/0x40 net/netlink/genetlink.c:742 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2362 ___sys_sendmsg+0xf3/0x170 net/socket.c:2416 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2449 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45de89 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f95513dac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002be80 RCX: 000000000045de89 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffcbfde65cf R14: 00007f95513db9c0 R15: 000000000118bf2c Modules linked in: ---[ end trace 05c4a6af3338fd59 ]--- RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x140 net/mac80211/chan.c:21 Code: a8 f6 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 e1 64 b0 f9 48 8d bb 58 09 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 68 48 8b 83 58 09 00 00 48 8d 98 a8 f6 ff ff 48 RSP: 0018:ffffc900167873f8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: deacfffffffff7a8 RCX: ffffc9000e597000 RDX: 0000000000040000 RSI: ffffffff87c4e20f RDI: dead000000000100 RBP: ffff8880a7738020 R08: 0000000000000000 R09: ffffffff8bb59e0f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff8880a7738000 R15: 0000000000000000 FS: 00007f95513db700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1f3130bf60 CR3: 00000000a695e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 --- 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.
