Hello,
syzbot found the following crash on:
HEAD commit: eed9688f8513 Merge branch 'ras-core-for-linus' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=103bffaf400000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa5c63e12fd85b25 dashboard link: https://syzkaller.appspot.com/bug?extid=83f2d54ec6b7e417e13f compiler: gcc (GCC) 8.0.1 20180413 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+83f2d54ec6b7e417e13f@syzkaller.appspotmail.com
bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves WARNING: CPU: 1 PID: 7 at net/batman-adv/multicast.c:337 batadv_mcast_mla_tt_retract+0x476/0x590 net/batman-adv/multicast.c:337 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.20.0+ #169 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_mcast_mla_update Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:batadv_mcast_mla_tt_retract+0x476/0x590 net/batman-adv/multicast.c:337 Code: 00 00 ad de 4c 89 ff 49 89 47 08 e8 b4 0f 03 fa e9 b6 fe ff ff 49 8d 47 10 48 89 85 60 ff ff ff e9 05 ff ff ff e8 4a 30 c0 f9 <0f> 0b e9 3f fc ff ff e8 6e 3b 03 fa e9 44 fe ff ff 4c 89 f7 e8 81 RSP: 0018:ffff8880a9e1f260 EFLAGS: 00010293 RAX: ffff8880a9e041c0 RBX: 0000000000000001 RCX: ffffffff87bedca3 RDX: 0000000000000000 RSI: ffffffff87bee066 RDI: 0000000000000007 RBP: ffff8880a9e1f328 R08: ffff8880a9e041c0 R09: ffffed1015ce5b8f R10: 0000000000000003 R11: ffff8880ae72dc7b R12: ffff8880a9e1f490 R13: 0000000000000000 R14: ffff888055b95fc0 R15: ffff8880a9e1f710 __batadv_mcast_mla_update net/batman-adv/multicast.c:635 [inline] batadv_mcast_mla_update+0x819/0x2da0 net/batman-adv/multicast.c:661 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..
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syzbot has found a reproducer for the following crash on:
HEAD commit: 4b3c31c8d4dd Merge branch 'i2c/for-current' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12fecc7f400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2 dashboard link: https://syzkaller.appspot.com/bug?extid=83f2d54ec6b7e417e13f compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=139c6408c00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+83f2d54ec6b7e417e13f@syzkaller.appspotmail.com
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready WARNING: CPU: 0 PID: 26 at net/batman-adv/multicast.c:337 batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337 kobject: 'lo' (000000007d40203a): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.0.0-rc1+ #21 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_mcast_mla_update Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 kobject: 'lo' (000000007d40203a): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'queues' (0000000029ca31b3): kobject_add_internal: parent: 'lo', set: '<NULL>' __warn.cold+0x20/0x48 kernel/panic.c:571 kobject: 'queues' (0000000029ca31b3): kobject_uevent_env report_bug+0x263/0x2b0 lib/bug.c:186 kobject: 'queues' (0000000029ca31b3): kobject_uevent_env: filter function caused the event to drop! fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 kobject: 'rx-0' (00000000a8654327): kobject_add_internal: parent: 'queues', set: 'queues' invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337 kobject: 'rx-0' (00000000a8654327): kobject_uevent_env Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 c8 00 00 00 48 81 c4 a0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 29 07 b0 f9 <0f> 0b e9 de fc ff ff e8 9d f2 f3 f9 e9 e3 fd ff ff 48 89 df e8 b0 RSP: 0018:ffff8880a96676b0 EFLAGS: 00010293 RAX: ffff8880a96586c0 RBX: 0000000000000001 RCX: ffffffff87d1ed13 RDX: 0000000000000000 RSI: ffffffff87d1f037 RDI: 0000000000000007 kobject: 'rx-0' (00000000a8654327): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' RBP: ffff8880a9667778 R08: ffff8880a96586c0 R09: 0000000000000003 R10: 0000000000000000 R11: ffff8880ae62dc7b R12: ffff8880a9667868 R13: 0000000000000000 R14: 1ffff110152ccf0d R15: ffff88808820dc40 kobject: 'tx-0' (00000000e6698f16): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000e6698f16): kobject_uevent_env kobject: 'tx-0' (00000000e6698f16): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' __batadv_mcast_mla_update net/batman-adv/multicast.c:635 [inline] batadv_mcast_mla_update+0x78e/0x2980 net/batman-adv/multicast.c:661 kobject: 'veth1_to_bond' (00000000a8d46f44): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'veth1_to_bond' (00000000a8d46f44): kobject_uevent_env kobject: 'veth1_to_bond' (00000000a8d46f44): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond' kobject: 'queues' (000000006228a66d): kobject_add_internal: parent: 'veth1_to_bond', set: '<NULL>' kobject: 'queues' (000000006228a66d): kobject_uevent_env kobject: 'queues' (000000006228a66d): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000008bc09a3a): kobject_add_internal: parent: 'queues', set: 'queues' process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 kobject: 'rx-0' (000000008bc09a3a): kobject_uevent_env kobject: 'rx-0' (000000008bc09a3a): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond/queues/rx-0' kobject: 'tx-0' (000000007f0c3f6d): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000007f0c3f6d): kobject_uevent_env kobject: 'tx-0' (000000007f0c3f6d): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond/queues/tx-0' kobject: 'batman_adv' (00000000f9be0f83): kobject_add_internal: parent: 'veth1_to_bond', set: '<NULL>' kobject: 'bond_slave_1' (000000003c754cbc): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'bond_slave_1' (000000003c754cbc): kobject_uevent_env worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kobject: 'bond_slave_1' (000000003c754cbc): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1' kobject: 'queues' (000000002a7c877f): kobject_add_internal: parent: 'bond_slave_1', set: '<NULL>' kobject: 'queues' (000000002a7c877f): kobject_uevent_env kobject: 'queues' (000000002a7c877f): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000bd1d2cc7): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000bd1d2cc7): kobject_uevent_env kobject: 'rx-0' (00000000bd1d2cc7): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1/queues/rx-0' kobject: 'tx-0' (00000000ccbdecac): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000ccbdecac): kobject_uevent_env kobject: 'tx-0' (00000000ccbdecac): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1/queues/tx-0' kobject: 'batman_adv' (0000000021ba1ff8): kobject_add_internal: parent: 'bond_slave_1', set: '<NULL>' kthread+0x357/0x430 kernel/kthread.c:246 kobject: 'ip6gretap0' (0000000011d834fd): kobject_add_internal: parent: 'net', set: 'devices' ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 kobject: 'ip6gretap0' (0000000011d834fd): kobject_uevent_env Kernel Offset: disabled Rebooting in 86400 seconds..
syzbot has bisected this bug to:
commit 2ed30cfcf866f657349bf9f54a017a957cd98378 Author: Heiko Stuebner heiko@sntech.de Date: Thu Aug 2 11:36:41 2018 +0000
arm64: dts: rockchip: enable dwc2-based otg controller on px30-evb
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=177e9917200000 start commit: 4b3c31c8 Merge branch 'i2c/for-current' of git://git.kerne.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=14fe9917200000 console output: https://syzkaller.appspot.com/x/log.txt?x=10fe9917200000 kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2 dashboard link: https://syzkaller.appspot.com/bug?extid=83f2d54ec6b7e417e13f syz repro: https://syzkaller.appspot.com/x/repro.syz?x=139c6408c00000
Reported-by: syzbot+83f2d54ec6b7e417e13f@syzkaller.appspotmail.com Fixes: 2ed30cfcf866 ("arm64: dts: rockchip: enable dwc2-based otg controller on px30-evb")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
b.a.t.m.a.n@lists.open-mesh.org
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syzbot