bisecting fixing commit since 9b15f7fae677336e04b9e026ff91854e43165455
building syzkaller on 5d7b90f1af2e3bf33992b75e7fcf0bab6bf49bd6
testing commit 9b15f7fae677336e04b9e026ff91854e43165455 with gcc (GCC) 8.1.0
kernel signature: 2ff99b0b5d19996dd3019f498a296c28833e94334da3e7c0a3bc4641a336c5e2
run #0: crashed: WARNING in process_one_work
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 corrupted
run #4: crashed: WARNING in corrupted
run #5: crashed: WARNING in corrupted
run #6: crashed: WARNING in corrupted
run #7: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #8: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #9: crashed: WARNING in corrupted
testing current HEAD 2263955bf7e71ca8419b64d7a60510aad29002f6
testing commit 2263955bf7e71ca8419b64d7a60510aad29002f6 with gcc (GCC) 8.1.0
kernel signature: 98f32033be79ca6da6b2515395c105d10374337ad5ddb6db6be188458c27953b
run #0: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
run #1: crashed: WARNING in process_one_work
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 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 corrupted
run #9: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
revisions tested: 2, total time: 23m53.228795381s (build: 17m25.397343257s, test: 5m49.822533426s)
the crash still happens on HEAD
commit msg: Linux 4.19.170
crash: WARNING in batadv_iv_send_outstanding_bat_ogm_packet
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00000000000009cb R14: 00000000004cc77d R15: 0000000000000004
------------[ cut here ]------------
WARNING: CPU: 1 PID: 23 at net/batman-adv/bat_iv_ogm.c:597 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:597 [inline]
WARNING: CPU: 1 PID: 23 at net/batman-adv/bat_iv_ogm.c:597 batadv_iv_send_outstanding_bat_ogm_packet.cold.25+0x30/0x37 net/batman-adv/bat_iv_ogm.c:1857
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.170-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:77 [inline]
 dump_stack+0x123/0x171 lib/dump_stack.c:118
 panic+0x1cd/0x375 kernel/panic.c:186
 __warn.cold.8+0x1b/0x36 kernel/panic.c:541
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:597 [inline]
RIP: 0010:batadv_iv_send_outstanding_bat_ogm_packet.cold.25+0x30/0x37 net/batman-adv/bat_iv_ogm.c:1857
Code: 87 e8 b5 5e ea ff 0f 0b e9 c7 55 cd ff 48 c7 c7 c0 5e d9 87 e8 a2 5e ea ff e9 b6 55 cd ff 48 c7 c7 80 5b d9 87 e8 91 5e ea ff <0f> 0b e9 a3 55 cd ff 48 c7 c7 80 5b d9 87 e8 7e 5e ea ff 0f 0b 4c
RSP: 0018:ffff8881f511fcd8 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff8881f4a4b948 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87679fe0 RDI: ffffffff8a189960
RBP: ffff8881f511fd58 R08: ffffed103ed25079 R09: ffffed103ed25078
R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881e004ddc0
R13: ffff8881f4a4b9e0 R14: ffff8881f4a4b900 R15: ffff8881e7b9b240
 process_one_work+0x830/0x1670 kernel/workqueue.c:2155
 worker_thread+0x85/0xb60 kernel/workqueue.c:2298
 kthread+0x347/0x410 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..