syzbot


WARNING in rtnl_dellink

Status: upstream: reported C repro on 2020/08/17 07:56
Reported-by: syzbot+c1a38e945f33e3f6e003@syzkaller.appspotmail.com
First crash: 1371d, last: 598d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in rtnl_dellink 1 424d 424d 0/3 auto-obsoleted due to no activity on 2023/07/20 02:27
upstream WARNING in rtnl_dellink (3) net C done 492 272d 282d 23/26 fixed on 2023/10/12 12:48
linux-4.14 WARNING in rtnl_dellink C error 1 1341d 1371d 0/1 upstream: reported C repro on 2020/08/17 04:45
upstream WARNING in rtnl_dellink net C done done 94 857d 1369d 20/26 fixed on 2022/05/13 11:13
upstream WARNING in rtnl_dellink (2) net 78 430d 548d 0/26 auto-obsoleted due to no activity on 2023/07/14 02:21
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2020/10/16 08:19 2m bisect fix linux-4.19.y error job log (0)
2020/09/16 07:55 23m bisect fix linux-4.19.y job log (0) log

Sample crash report:
8021q: adding VLAN 0 to HW filter on device bond1
bond0: Enslaving bond1 as an active interface with an up link
bond1: The slave device specified does not support setting the MAC address
bond1 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9133 at net/core/dev.c:8207 rollback_registered_many.cold+0x169/0x1b8 net/core/dev.c:8207
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 9133 Comm: syz-executor124 Not tainted 4.19.139-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x61 kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:rollback_registered_many.cold+0x169/0x1b8 net/core/dev.c:8207
Code: 44 24 08 eb cd 48 89 c7 48 89 44 24 08 e8 ad 97 e5 fb 48 8b 44 24 08 eb cf e8 21 76 af fb 48 c7 c7 80 e9 2a 88 e8 84 83 9a fb <0f> 0b e9 1a c0 ff ff e8 09 76 af fb 48 c7 c7 80 e9 2a 88 e8 6c 83
RSP: 0018:ffff88808c5cf348 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff888081598040 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8154cf41 RDI: ffffed10118b9e5b
RBP: ffff88808c5cf558 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000008d8ae601 R14: ffffffff8455e0a0 R15: ffff88808c5cf410
 unregister_netdevice_many.part.0+0x1a/0x300 net/core/dev.c:9310
 unregister_netdevice_many+0x36/0x50 net/core/dev.c:9309
 rtnl_delete_link net/core/rtnetlink.c:2760 [inline]
 rtnl_dellink+0x361/0x920 net/core/rtnetlink.c:2814
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4778
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2115
 __sys_sendmsg net/socket.c:2153 [inline]
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x449f09
Code: e8 ac e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1a26561d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dfcb8 RCX: 0000000000449f09
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000009
RBP: 00000000006dfcb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfcbc
R13: 0000000000000000 R14: 0000000000000000 R15: 068500100000003c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/08/17 07:55 linux-4.19.y c14d30dc9987 5ce13532 .config console log report syz C ci2-linux-4-19
2022/09/29 15:36 linux-4.19.y 3f8a27f9e27b 45fd7169 .config console log report info ci2-linux-4-19 WARNING in rtnl_dellink
* Struck through repros no longer work on HEAD.