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WARNING in geneve_exit_batch_net (2)

Status: fixed on 2020/05/10 10:42
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+68a8ed58e3d17c700de5@syzkaller.appspotmail.com
Fix commit: 0fda7600c2e1 geneve: move debug check after netdev unregister
First crash: 1515d, last: 1488d
Cause bisection: introduced by (bisect log) :
commit 4e645b47c4f000a503b9c90163ad905786b9bc1d
Author: Florian Westphal <fw@strlen.de>
Date: Thu Nov 30 23:21:02 2017 +0000

  netfilter: core: make nf_unregister_net_hooks simple wrapper again

Crash: WARNING in geneve_exit_batch_net (log)
Repro: C syz .config
  
▶ ▼ Discussions (5)
Title Replies (including bot) Last reply
[PATCH 4.19 000/116] 4.19.114-rc1 review 129 (129) 2020/04/02 20:04
[PATCH 5.5 000/170] 5.5.14-rc1 review 180 (180) 2020/04/02 17:40
[PATCH 5.4 000/155] 5.4.29-rc1 review 156 (156) 2020/03/31 08:59
[PATCH net] geneve: move debug check after netdev unregister 2 (2) 2020/03/15 07:43
WARNING in geneve_exit_batch_net (2) 2 (4) 2020/03/13 07:30
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in geneve_exit_batch_net net 15 1522d 1547d 15/26 fixed on 2020/02/18 14:31
linux-4.19 WARNING in geneve_exit_batch_net C done 2 1482d 1526d 1/1 fixed on 2020/04/29 09:12
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2020/03/13 01:54 19m fw@strlen.de git://git.breakpoint.cc/fw/net.git geneve_fp OK

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 77 at drivers/net/geneve.c:1849 geneve_destroy_tunnels drivers/net/geneve.c:1849 [inline]
WARNING: CPU: 0 PID: 77 at drivers/net/geneve.c:1849 geneve_exit_batch_net+0x53e/0x640 drivers/net/geneve.c:1859
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 77 Comm: kworker/u4:2 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:geneve_destroy_tunnels drivers/net/geneve.c:1849 [inline]
RIP: 0010:geneve_exit_batch_net+0x53e/0x640 drivers/net/geneve.c:1859
Code: fc 48 c7 c2 20 32 c0 88 be 2d 00 00 00 48 c7 c7 80 35 c0 88 c6 05 d9 70 d6 05 01 e8 31 09 91 fc e9 64 fc ff ff e8 e2 0f ab fc <0f> 0b e9 91 fe ff ff 48 8d 43 c0 48 89 85 68 ff ff ff e9 bb fe ff
RSP: 0018:ffffc900010a7b68 EFLAGS: 00010293
RAX: ffff8880a97b0040 RBX: dffffc0000000000 RCX: ffffffff863887dc
RDX: 0000000000000000 RSI: ffffffff84ca876e RDI: ffff8880949e2070
RBP: ffffc900010a7c18 R08: ffff8880a97b0040 R09: fffffbfff14e9bc5
R10: fffffbfff14e9bc4 R11: ffffffff8a74de27 R12: ffff8880921e6380
R13: ffff8880a6feef50 R14: ffff8880a6feef40 R15: ffff8880a6feef40
 ops_exit_list.isra.0+0x10c/0x160 net/core/net_namespace.c:175
 cleanup_net+0x549/0xb10 net/core/net_namespace.c:589
 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
 worker_thread+0x98/0xe40 kernel/workqueue.c:2410
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/03/03 20:37 upstream 63623fd44972 c88c7b75 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2020/02/28 22:32 upstream f8788d86ab28 59b57593 .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/02/27 01:26 net-next-old c3e042f54107 59b57593 .config console log report syz C ci-upstream-net-kasan-gce
2020/03/21 03:52 upstream 6c90b86a745a 2c31c529 .config console log report ci-upstream-kasan-gce-selinux-root
2020/03/08 14:42 net-old aeaa925bff84 2e9971bb .config console log report ci-upstream-net-this-kasan-gce
2020/03/24 02:26 net-next-old 6919a8264a32 84f999d6 .config console log report ci-upstream-net-kasan-gce
2020/03/01 03:07 net-next-old 3b3e808cd883 c88c7b75 .config console log report ci-upstream-net-kasan-gce
2020/02/26 22:53 net-next-old c3e042f54107 59b57593 .config console log report ci-upstream-net-kasan-gce
2020/02/25 08:56 net-next-old c3e042f54107 59b57593 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.