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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