bisecting fixing commit since b98aebd298246df37b472c52a2ee1023256d02e3
building syzkaller on d01bb02a96019cda0fa8c46e5c6d5eb66a273f17
testing commit b98aebd298246df37b472c52a2ee1023256d02e3 with gcc (GCC) 8.1.0
kernel signature: cac4ecd27dec12d15499e88d6fed5b0057cefb29bc3f1f3ed8015ce97f4578f6
run #0: crashed: WARNING in corrupted
run #1: crashed: WARNING in corrupted
run #2: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #3: crashed: WARNING in corrupted
run #4: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #5: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #6: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #7: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #8: crashed: WARNING in corrupted
run #9: crashed: WARNING in corrupted
testing current HEAD 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14
testing commit 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14 with gcc (GCC) 8.1.0
kernel signature: 90f4300b8c8622607cde97eb3aa597a3ecab58a53a723676ecf1dfe78d7718e6
run #0: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #1: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #2: crashed: WARNING in process_one_work
run #3: crashed: WARNING in process_one_work
run #4: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #5: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #6: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #7: crashed: WARNING in corrupted
run #8: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #9: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
revisions tested: 2, total time: 32m47.703970264s (build: 17m17.668062604s, test: 14m39.684337147s)
the crash still happens on HEAD
commit msg: Linux 4.14.173
crash: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5fa9bae6d4
R13: 00000000004c81fc R14: 00000000004de220 R15: 0000000000000006
------------[ cut here ]------------
WARNING: CPU: 0 PID: 210 at net/batman-adv/bat_iv_ogm.c:555 batadv_iv_send_outstanding_bat_ogm_packet+0x5dc/0x770 net/batman-adv/bat_iv_ogm.c:1785
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 210 Comm: kworker/u4:3 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xf7/0x13b lib/dump_stack.c:58
 panic+0x1b0/0x358 kernel/panic.c:183
 __warn.cold.8+0x25/0x2c kernel/panic.c:547
 report_bug+0x1a4/0x1f3 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:555 [inline]
RIP: 0010:batadv_iv_send_outstanding_bat_ogm_packet+0x5dc/0x770 net/batman-adv/bat_iv_ogm.c:1797
RSP: 0018:ffff8880a94afce8 EFLAGS: 00010286
RAX: ffff888081d65a00 RBX: ffff888097952188 RCX: 1ffff1101524535d
RDX: 0000000000000000 RSI: ffffffff87990f20 RDI: ffff8880a9229ae8
RBP: ffff8880a94afd60 R08: ffff8880a949cd08 R09: 00000000000063f2
R10: 0000000000000028 R11: ffff8880a949c440 R12: ffff888091a59200
R13: ffff888097952140 R14: ffff8880a9229a80 R15: ffff888097952228
 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2114
 worker_thread+0xcc/0xee0 kernel/workqueue.c:2248
 kthread+0x338/0x400 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..