bisecting fixing commit since 7e25f40eab52c57ff6772d27d2aef3640a3237d7 building syzkaller on c59079a693ad1d89c782f7db14b9f1c5629e2abc testing commit 7e25f40eab52c57ff6772d27d2aef3640a3237d7 with gcc (GCC) 10.2.1 20210217 kernel signature: 69f9e1efb69892ebebbe9994f2ec0f4060034f2cfd639aebd4e08a6459cb3557 all runs: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata testing current HEAD d07f6ca923ea0927a1024dfccafc5b53b61cfecc testing commit d07f6ca923ea0927a1024dfccafc5b53b61cfecc with gcc (GCC) 10.2.1 20210217 kernel signature: b31d388935d5f297492a5ed6f737c9fef4c31585dd522f1e432a3e6c59923c56 all runs: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata revisions tested: 2, total time: 21m42.164078183s (build: 14m1.511953785s, test: 7m2.549971415s) the crash still happens on HEAD commit msg: Linux 5.13-rc2 crash: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata ------------[ cut here ]------------ ODEBUG: init active (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 1 PID: 10162 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 1 PID: 10162 Comm: syz-executor.2 Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd c0 99 fe 88 4c 89 ee 48 c7 c7 c0 8d fe 88 e8 0b a9 8a 04 <0f> 0b 83 05 25 a2 d8 08 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc9000b2c7490 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff88fe89a0 RDI: fffff52001658e84 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba12fec7 R10: ffffed1017425fd8 R11: 000000004245444f R12: ffffffff88accf60 R13: ffffffff88fe92c0 R14: ffffffff8159def0 R15: ffffffff8e9d3330 FS: 00007fe2b0739700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f289bd10000 CR3: 000000002fad0000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_object_init+0x524/0xd10 lib/debugobjects.c:588 debug_timer_init kernel/time/timer.c:722 [inline] debug_init kernel/time/timer.c:770 [inline] init_timer_key+0x24/0x250 kernel/time/timer.c:814 ieee80211_ibss_setup_sdata+0x28/0x1b0 net/mac80211/ibss.c:1734 ieee80211_setup_sdata+0xbcb/0xe90 net/mac80211/iface.c:1552 ieee80211_runtime_change_iftype net/mac80211/iface.c:1658 [inline] ieee80211_if_change_type+0x43b/0x590 net/mac80211/iface.c:1680 ieee80211_change_iface+0x23/0x1d0 net/mac80211/cfg.c:157 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline] cfg80211_change_iface+0x24a/0xc40 net/wireless/util.c:1067 nl80211_set_interface+0x435/0x840 net/wireless/nl80211.c:3918 genl_family_rcv_msg_doit+0x1e4/0x2f0 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b RSP: 002b:00007fe2b0737f80 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fe2b07380f0 RCX: 00000000004193ec RDX: 0000000000000024 RSI: 00007fe2b0738140 RDI: 0000000000000006 RBP: 0000000000000000 R08: 00007fe2b0737fd4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007fe2b0738140 R14: 0000000000000006 R15: 0000000000000000