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BUG: unable to handle kernel paging request in iptunnel_xmit

Status: auto-closed as invalid on 2019/10/25 08:36
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+61816a2458fec4918227@syzkaller.appspotmail.com
First crash: 2276d, last: 2104d
▶ ▼ Duplicate bugs (1)
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
BUG: unable to handle page fault for address: ADDR net 1 2136d 2136d 0/28 closed as dup on 2019/05/09 12:52
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
Reminder: 14 open syzbot bugs in "net/tipc" subsystem 1 (1) 2019/07/24 01:46
BUG: unable to handle page fault for address: ADDR 1 (2) 2019/05/09 12:52
BUG: unable to handle kernel paging request in iptunnel_xmit 0 (1) 2018/12/21 08:38

Sample crash report:
BUG: unable to handle page fault for address: ffffde20274c4273
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 13215 Comm: kworker/0:2 Not tainted 5.2.0-rc2+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events iterate_cleanup_work
RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline]
RIP: 0010:iptunnel_xmit+0x6e5/0x970 net/ipv4/ip_tunnel_core.c:94
Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 f2 74 88 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00
RSP: 0018:ffff8880ae8098c8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff11013a621380 RCX: 1ffffffff10e9e4c
RDX: 1fffe220274c4273 RSI: ffffffff8335522c RDI: ffff11013a621398
RBP: ffff8880ae809928 R08: ffff888062e64100 R09: ffffed1015d06be0
R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000000000fc
R13: ffff88809d1c2940 R14: ffff88808b8032d4 R15: ffff8880636778c0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde20274c4273 CR3: 00000000a430f000 CR4: 00000000001406f0
Call Trace:
 <IRQ>
 udp_tunnel_xmit_skb+0x236/0x310 net/ipv4/udp_tunnel.c:192
 tipc_udp_xmit.isra.0+0x802/0xcc0 net/tipc/udp_media.c:181
 tipc_udp_send_msg+0x295/0x4a0 net/tipc/udp_media.c:247
 tipc_bearer_xmit_skb+0x16c/0x360 net/tipc/bearer.c:503
 tipc_disc_timeout+0x933/0xd60 net/tipc/discover.c:332
 call_timer_fn+0x193/0x720 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers kernel/time/timer.c:1685 [inline]
 __run_timers kernel/time/timer.c:1653 [inline]
 run_timer_softirq+0x66f/0x1740 kernel/time/timer.c:1698
 __do_softirq+0x25c/0x94c kernel/softirq.c:293
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1040
 </IRQ>
 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:338
 do_softirq kernel/softirq.c:330 [inline]
 __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:190
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 get_next_corpse net/netfilter/nf_conntrack_core.c:2018 [inline]
 nf_ct_iterate_cleanup+0x217/0x4e0 net/netfilter/nf_conntrack_core.c:2041
 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2126 [inline]
 nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2111
 iterate_cleanup_work+0x4a/0xd7 net/netfilter/nf_nat_masquerade.c:216
 process_one_work+0x989/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: ffffde20274c4273
---[ end trace fcfdf8a99bd9c452 ]---
RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline]
RIP: 0010:iptunnel_xmit+0x6e5/0x970 net/ipv4/ip_tunnel_core.c:94
Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 f2 74 88 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00
RSP: 0018:ffff8880ae8098c8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: ffff11013a621380 RCX: 1ffffffff10e9e4c
RDX: 1fffe220274c4273 RSI: ffffffff8335522c RDI: ffff11013a621398
RBP: ffff8880ae809928 R08: ffff888062e64100 R09: ffffed1015d06be0
R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000000000fc
R13: ffff88809d1c2940 R14: ffff88808b8032d4 R15: ffff8880636778c0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde20274c4273 CR3: 00000000a430f000 CR4: 00000000001406f0

Crashes (481):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/06/02 16:05 net-old e8d67fa5696e 53c81ea5 .config console log report ci-upstream-net-this-kasan-gce
2019/06/01 16:31 net-old e8d67fa5696e 53c81ea5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/28 06:06 net-old 3e66b7cc50ef 6bd61501 .config console log report ci-upstream-net-this-kasan-gce
2019/05/24 08:57 net-old b5730061d105 0dadcd9d .config console log report ci-upstream-net-this-kasan-gce
2019/05/24 02:12 net-old b5730061d105 0dadcd9d .config console log report ci-upstream-net-this-kasan-gce
2019/05/16 21:18 net-old c7d5ec26ea4a f59a9cb5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/15 21:38 net-old cb07d915bf27 3345130d .config console log report ci-upstream-net-this-kasan-gce
2019/05/14 18:19 net-old 63863ee8e2f6 ada3c44c .config console log report ci-upstream-net-this-kasan-gce
2019/05/13 07:40 net-old 69dda13fdaff 16ab1e89 .config console log report ci-upstream-net-this-kasan-gce
2019/05/12 18:15 net-old 8f779443b440 5f302c04 .config console log report ci-upstream-net-this-kasan-gce
2019/05/12 11:41 net-old 8f779443b440 c017728b .config console log report ci-upstream-net-this-kasan-gce
2019/05/12 06:19 net-old 8f779443b440 c017728b .config console log report ci-upstream-net-this-kasan-gce
2019/05/11 16:42 net-old daf3ddbe11a2 46caad94 .config console log report ci-upstream-net-this-kasan-gce
2019/05/11 02:39 net-old daf3ddbe11a2 46caad94 .config console log report ci-upstream-net-this-kasan-gce
2019/05/11 00:41 net-old e711ab936a44 cfeec859 .config console log report ci-upstream-net-this-kasan-gce
2019/05/10 11:34 net-old 601e6bcc4ef0 018207ef .config console log report ci-upstream-net-this-kasan-gce
2019/05/10 09:53 net-old 601e6bcc4ef0 018207ef .config console log report ci-upstream-net-this-kasan-gce
2019/05/10 07:38 net-old 601e6bcc4ef0 018207ef .config console log report ci-upstream-net-this-kasan-gce
2019/05/09 22:36 net-old 5f05836831f6 6fc130d3 .config console log report ci-upstream-net-this-kasan-gce
2019/05/08 15:34 net-old 982e826d31b1 a7383bfa .config console log report ci-upstream-net-this-kasan-gce
2019/05/08 13:12 net-old 982e826d31b1 a7383bfa .config console log report ci-upstream-net-this-kasan-gce
2019/05/08 06:51 net-old 982e826d31b1 a7383bfa .config console log report ci-upstream-net-this-kasan-gce
2019/05/07 23:29 net-old 982e826d31b1 a7383bfa .config console log report ci-upstream-net-this-kasan-gce
2019/05/07 18:53 net-old 9b3040a6aafd d28f4ce5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/07 17:39 net-old 9b3040a6aafd d28f4ce5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/04 17:09 net-old 93aa4792c390 d28f4ce5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/04 12:01 net-old 93aa4792c390 d28f4ce5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/04 03:23 net-old ea9866793d1e d28f4ce5 .config console log report ci-upstream-net-this-kasan-gce
2019/05/03 17:50 net-old ea9866793d1e 1bfa09b9 .config console log report ci-upstream-net-this-kasan-gce
2019/05/03 10:38 net-old ea9866793d1e 1bfa09b9 .config console log report ci-upstream-net-this-kasan-gce
2019/05/03 03:51 net-old 4dd2b82d5adf e9039493 .config console log report ci-upstream-net-this-kasan-gce
2019/05/02 15:18 net-old d2f0c961148f 7516d9fa .config console log report ci-upstream-net-this-kasan-gce
2019/05/02 13:11 net-old d2f0c961148f 7516d9fa .config console log report ci-upstream-net-this-kasan-gce
2019/05/02 06:19 net-old d2f0c961148f 7516d9fa .config console log report ci-upstream-net-this-kasan-gce
2019/05/02 04:38 net-old d2f0c961148f 7516d9fa .config console log report ci-upstream-net-this-kasan-gce
2019/05/02 02:24 net-old d2f0c961148f 7516d9fa .config console log report ci-upstream-net-this-kasan-gce
2019/05/02 00:51 net-old d2f0c961148f 7516d9fa .config console log report ci-upstream-net-this-kasan-gce
2019/05/01 17:03 net-old 0e2338749192 618456b4 .config console log report ci-upstream-net-this-kasan-gce
2018/12/20 18:47 net-old d84e7bc0595a aaf59e84 .config console log report ci-upstream-net-this-kasan-gce
2019/06/10 15:50 net-next-old ad3a9ee0b623 0159583c .config console log report ci-upstream-net-kasan-gce
2019/05/24 13:01 net-next-old dfb569f2b96e 0dadcd9d .config console log report ci-upstream-net-kasan-gce
2019/05/13 22:14 net-next-old b970afcfcabd 7c305b44 .config console log report ci-upstream-net-kasan-gce
2019/05/07 09:46 net-next-old 54516da1ea85 d28f4ce5 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.