syzbot


WARNING in rtnl_dellink

Status: upstream: reported C repro on 2020/08/17 04:45
Reported-by: syzbot+8a712bc98b416071baea@syzkaller.appspotmail.com
First crash: 1375d, last: 1345d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in rtnl_dellink C error 2 602d 1375d 0/1 upstream: reported C repro on 2020/08/17 07:56
linux-6.1 WARNING in rtnl_dellink 1 429d 429d 0/3 auto-obsoleted due to no activity on 2023/07/20 02:27
upstream WARNING in rtnl_dellink (3) net C done 492 276d 286d 23/26 fixed on 2023/10/12 12:48
upstream WARNING in rtnl_dellink net C done done 94 862d 1373d 20/26 fixed on 2022/05/13 11:13
upstream WARNING in rtnl_dellink (2) net 78 435d 552d 0/26 auto-obsoleted due to no activity on 2023/07/14 02:21
Last patch testing requests (2)
Created Duration User Patch Repo Result
2023/02/03 10:32 10m retest repro linux-4.14.y report log
2022/09/13 00:27 9m retest repro linux-4.14.y report log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2020/10/16 05:43 5m bisect fix linux-4.14.y error job log (0)
2020/09/16 05:10 22m bisect fix linux-4.14.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: 6816 at net/core/dev.c:7222 rollback_registered_many+0x90d/0xb30 net/core/dev.c:7222
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 6816 Comm: syz-executor142 Not tainted 4.14.193-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:rollback_registered_many+0x90d/0xb30 net/core/dev.c:7222
RSP: 0018:ffff8880948c74f8 EFLAGS: 00010297
RAX: ffff888093de0680 RBX: ffff8880948c7630 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888093de0f08 RDI: 0000000000000000
RBP: ffff8880862c1b40 R08: ffffffff887226a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880948c7530 R14: ffff8880862c1bf0 R15: ffffffff83dce310
 unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8284
 unregister_netdevice_many+0x36/0x50 net/core/dev.c:8283
 rtnl_delete_link net/core/rtnetlink.c:2375 [inline]
 rtnl_dellink+0x25b/0x6a0 net/core/rtnetlink.c:2411
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x449dc9
RSP: 002b:00007f3535b26d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dfc88 RCX: 0000000000449dc9
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000009
RBP: 00000000006dfc80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc8c
R13: 0000000000000000 R14: 0000000000000000 R15: 068500100000003c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/08/17 04:44 linux-4.14.y 14b58326976d 5ce13532 .config console log report syz C ci2-linux-4-14
* Struck through repros no longer work on HEAD.