general protection fault in dst_dev

general protection fault in dst_dev_put (6)
Status: upstream: reported on 2020/12/30 19:36
Reported-by: syzbot+0f1d7ae54b1e86cb1b67@syzkaller.appspotmail.com
First crash: 29d, last: 2d10h

similar bugs (5):
Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in dst_dev_put (2)	C	done	442	586d	775d	13/17	fixed on 2019/07/10 21:40
upstream	general protection fault in dst_dev_put (5)			4	121d	146d	0/17	auto-closed as invalid on 2020/12/25 06:24
upstream	general protection fault in dst_dev_put (4)			1	266d	266d	0/17	closed as invalid on 2020/05/28 16:43
upstream	general protection fault in dst_dev_put (3)			1	467d	467d	0/17	auto-closed as invalid on 2020/01/14 01:13
upstream	general protection fault in dst_dev_put			1	1137d	1133d	0/17	closed as invalid on 2018/02/13 19:55

Sample crash report:

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.11.0-rc4-next-20210121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dst_dev_put+0x1d/0x220 net/core/dst.c:156
Code: d3 b9 fa e9 53 ff ff ff cc cc cc cc cc 41 54 55 53 48 89 fb e8 54 d4 76 fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8b 01 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffffc90000d97be8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000100
RDX: 0000000000000000 RSI: ffffffff86fc47fc RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ed5287f
R10: ffffffff87899e45 R11: 000000000000015f R12: 0000000000000007
R13: fffffbfff1a092c4 R14: 0000607f45e3b8e8 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556d1426b508 CR3: 00000000215d6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rt_fibinfo_free_cpus.part.0+0xda/0x140 net/ipv4/fib_semantics.c:202
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:194 [inline]
 fib_nh_common_release+0xff/0x330 net/ipv4/fib_semantics.c:215
 fib_nh_release net/ipv4/fib_semantics.c:227 [inline]
 free_fib_info_rcu+0x254/0x4e0 net/ipv4/fib_semantics.c:239
 rcu_do_batch kernel/rcu/tree.c:2531 [inline]
 rcu_core+0x746/0x1390 kernel/rcu/tree.c:2766
 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343
 run_ksoftirqd kernel/softirq.c:650 [inline]
 run_ksoftirqd+0x2d/0x50 kernel/softirq.c:642
 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
---[ end trace 1f2d6796755c7049 ]---
RIP: 0010:dst_dev_put+0x1d/0x220 net/core/dst.c:156
Code: d3 b9 fa e9 53 ff ff ff cc cc cc cc cc 41 54 55 53 48 89 fb e8 54 d4 76 fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8b 01 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffffc90000d97be8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000100
RDX: 0000000000000000 RSI: ffffffff86fc47fc RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ed5287f
R10: ffffffff87899e45 R11: 000000000000015f R12: 0000000000000007
R13: fffffbfff1a092c4 R14: 0000607f45e3b8e8 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556d1426b508 CR3: 00000000215d6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Maintainers
ci-upstream-linux-next-kasan-gce-root	2021/01/22 21:07	linux-next	bc085f8f	4080af96	.config	log	report			info	davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linmiaohe@huawei.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/12/26 14:06	upstream	40f78232	821e0b09	.config	log	report			info	davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linmiaohe@huawei.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org