bisecting fixing commit since 4d469ec8ec05e1fa4792415de1a95b28871ff2fa building syzkaller on 23a562dfb3a9986a066a1341c2cfc9e87a8fa164 testing commit 4d469ec8ec05e1fa4792415de1a95b28871ff2fa with gcc (GCC) 10.2.1 20210217 kernel signature: 0d67919be8adb0b1a0273a1f47153fd5f3deb930cedb7c885fa2bf686b4cebf4 run #0: crashed: WARNING: ODEBUG bug in slave_kobj_release run #1: crashed: WARNING: ODEBUG bug in slave_kobj_release run #2: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #3: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #4: crashed: WARNING: ODEBUG bug in slave_kobj_release run #5: crashed: WARNING: ODEBUG bug in slave_kobj_release run #6: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #7: crashed: WARNING: ODEBUG bug in slave_kobj_release run #8: crashed: WARNING: ODEBUG bug in slave_kobj_release run #9: crashed: WARNING: ODEBUG bug in slave_kobj_release run #10: crashed: WARNING: ODEBUG bug in slave_kobj_release run #11: crashed: WARNING: ODEBUG bug in slave_kobj_release run #12: crashed: WARNING: ODEBUG bug in slave_kobj_release run #13: crashed: WARNING: ODEBUG bug in slave_kobj_release run #14: crashed: WARNING: ODEBUG bug in slave_kobj_release run #15: crashed: WARNING: ODEBUG bug in slave_kobj_release run #16: crashed: WARNING: ODEBUG bug in slave_kobj_release run #17: crashed: WARNING: ODEBUG bug in slave_kobj_release run #18: crashed: WARNING: ODEBUG bug in slave_kobj_release run #19: crashed: WARNING: ODEBUG bug in slave_kobj_release testing current HEAD f5120f5998803a973b1d432ed2aa7e592527aa46 testing commit f5120f5998803a973b1d432ed2aa7e592527aa46 with gcc (GCC) 10.2.1 20210217 kernel signature: e4bb7ce72b6b10fd396887ade3be6192c8fd742fdc0465917aaf9760c83ac851 run #0: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #1: crashed: WARNING: ODEBUG bug in slave_kobj_release run #2: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #3: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #4: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #5: crashed: WARNING: ODEBUG bug in slave_kobj_release run #6: crashed: WARNING: ODEBUG bug in slave_kobj_release run #7: crashed: WARNING: ODEBUG bug in slave_kobj_release run #8: crashed: WARNING: ODEBUG bug in slave_kobj_release run #9: crashed: WARNING: ODEBUG bug in slave_kobj_release revisions tested: 2, total time: 35m15.433698877s (build: 15m15.992436366s, test: 19m4.423267173s) the crash still happens on HEAD commit msg: dpaa2-eth: don't print error from dpaa2_mac_connect if that's EPROBE_DEFER crash: WARNING: ODEBUG bug in slave_kobj_release R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049f6dc R13: 00007f54f74c9300 R14: 0000000000000002 R15: 0000000000022000 kobject_add_internal failed for bonding_slave (error: -12 parent: virt_wifi0) ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 0 PID: 14817 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 14817 Comm: syz-executor766 Not tainted 5.12.0-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 00 66 fc 88 4c 89 ee 48 c7 c7 00 5a fc 88 e8 5a ce 8a 04 <0f> 0b 83 05 d5 0a dc 08 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc900027fe9e0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520004ffd2e RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b R10: ffffed1017403f4b R11: 203a47554245444f R12: ffffffff88acd9e0 R13: ffffffff88fc6080 R14: ffffffff815a1e50 R15: 1ffff920004ffd47 FS: 00007f54f74c9700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004909e0 CR3: 0000000020bfd000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_assert_init lib/debugobjects.c:890 [inline] debug_object_assert_init+0x1f4/0x2e0 lib/debugobjects.c:861 debug_timer_assert_init kernel/time/timer.c:737 [inline] debug_assert_init kernel/time/timer.c:782 [inline] del_timer+0x65/0xf0 kernel/time/timer.c:1202 try_to_grab_pending+0x41/0x80 kernel/workqueue.c:1252 __cancel_work_timer+0x9c/0x450 kernel/workqueue.c:3098 slave_kobj_release+0x43/0xd0 drivers/net/bonding/bond_main.c:1491 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x139/0x410 lib/kobject.c:753 bond_kobj_init drivers/net/bonding/bond_main.c:1512 [inline] bond_alloc_slave drivers/net/bonding/bond_main.c:1529 [inline] bond_enslave+0x1d45/0x43b0 drivers/net/bonding/bond_main.c:1731 do_setlink+0x84b/0x2cb0 net/core/rtnetlink.c:2717 __rtnl_newlink+0xabb/0x1360 net/core/rtnetlink.c:3373 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3488 rtnetlink_rcv_msg+0x32f/0x8c0 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 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_sendmsg+0x5bf/0x7a0 net/socket.c:2350 ___sys_sendmsg+0xd3/0x150 net/socket.c:2404 __sys_sendmsg+0xb2/0x140 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x44a5f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 16 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f54f74c92f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004d62c8 RCX: 000000000044a5f9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 00000000004d62c0 R08: 0000000000000002 R09: 0000000000003031 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049f6dc R13: 00007f54f74c9300 R14: 0000000000000002 R15: 0000000000022000