Re: [BUG REPORT] kernel BUG at lib/dynamic_queue_limits.c:99!

[xiujianfeng]

On 2024/7/12 10:08, xiujianfeng wrote:
> I found a problem with my QEMU environment, and the log is as follows.
> 
> After I did the bisect to locate the issue, I found
> 8490dd0592e85e0cceefa6b48d66dbdd73df0fb3 is the first bad commit,
> however this is a merge commit, and I cannot further confirm which
> specific commit caused this issue.

It's on
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git and
the base commit is f477dd6eede3

> 
> ------------[ cut here ]------------
> kernel BUG at lib/dynamic_queue_limits.c:99!
> Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
> CPU: 1 UID: 0 PID: 203 Comm: ip Not tainted
> 6.10.0-rc7-next-20240711-12643-gf477dd6eede3 #613
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1
> 04/01/2014
> RIP: 0010:dql_completed+0x212/0x230
> Code: 41 1c 01 48 89 57 58 e9 85 fe ff ff 85 ed 40 0f 95 c5 41 39 d8 0f
> 95 c1 40 84 cd 74 05 45 85 e4 78 0a 44 89 d9 e9 67 fe fe
> RSP: 0018:ffffc900000f0d70 EFLAGS: 00000213
> RAX: 0000000000000000 RBX: ffff88800413b800 RCX: ffff888005925240
> RDX: 0000000000000000 RSI: 0000000081df1116 RDI: ffff888003a0d700
> RBP: ffff888003a0d600 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: ffff88800a403c90 R12: 0000000000000001
> R13: ffffc900000f0db0 R14: ffff888003a0d680 R15: ffff88803cc80000
> FS:  00007fcf4229f1c0(0000) GS:ffff88803cc80000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00005596d60d1290 CR3: 00000000093c0000 CR4: 00000000000006f0
> Call Trace:
>  <IRQ>
>  ? die+0x32/0x90
>  ? do_trap+0xdc/0x100
>  ? dql_completed+0x212/0x230
>  ? do_error_trap+0x60/0x80
>  ? dql_completed+0x212/0x230
>  ? exc_invalid_op+0x4f/0x70
>  ? dql_completed+0x212/0x230
>  ? asm_exc_invalid_op+0x1a/0x20
>  ? dql_completed+0x212/0x230
>  __free_old_xmit+0xb2/0x120
>  free_old_xmit+0x23/0x70
>  ? _raw_spin_trylock+0x46/0x60
>  virtnet_poll+0xe0/0x590
>  ? update_curr+0xf9/0x1c0
>  ? find_held_lock+0x2b/0x80
>  __napi_poll+0x25/0x160
>  net_rx_action+0x177/0x310
>  ? clockevents_program_event+0x53/0x100
>  ? lock_release+0xa4/0x1d0
>  ? ktime_get+0x76/0x100
>  ? lapic_next_event+0x10/0x20
>  handle_softirqs+0xd0/0x210
>  do_softirq+0x3b/0x60
>  </IRQ>
>  <TASK>
>  __local_bh_enable_ip+0x55/0x70
>  virtnet_open+0xac/0x2d0
>  __dev_open+0xda/0x190
>  __dev_change_flags+0x1b3/0x230
>  ? __pfx_stack_trace_consume_entry+0x10/0x10
>  ? arch_stack_walk+0x9d/0xf0
>  dev_change_flags+0x20/0x60
>  do_setlink+0x27e/0x1120
>  ? set_track_prepare+0x3b/0x60
>  ? rtnl_newlink+0x5a/0xa0
>  ? rtnetlink_rcv_msg+0x199/0x4c0
>  ? __nla_validate_parse+0x5e/0xed0
>  ? netlink_sendmsg+0x1e3/0x420
>  ? __sock_sendmsg+0x5e/0x60
>  ? ____sys_sendmsg+0x1da/0x210
>  ? ___sys_sendmsg+0x7b/0xc0
>  ? __sys_sendmsg+0x50/0x90
>  ? do_syscall_64+0x4b/0x110
>  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
>  __rtnl_newlink+0x50d/0x990
>  ? __kmalloc_cache_noprof+0x1a0/0x260
>  ? __kmalloc_cache_noprof+0x204/0x260
>  ? rtnetlink_rcv_msg+0x14e/0x4c0
>  ? rtnl_newlink+0x5a/0xa0
>  rtnl_newlink+0x73/0xa0
>  rtnetlink_rcv_msg+0x199/0x4c0
>  ? find_held_lock+0x2b/0x80
>  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
>  netlink_rcv_skb+0x56/0x100
>  ? netlink_unicast+0x69/0x3a0
>  netlink_unicast+0x283/0x3a0
>  netlink_sendmsg+0x1e3/0x420
>  __sock_sendmsg+0x5e/0x60
>  ____sys_sendmsg+0x1da/0x210
>  ? copy_msghdr_from_user+0x68/0xa0
>  ___sys_sendmsg+0x7b/0xc0
>  ? stack_depot_save_flags+0x2e/0x8a0
>  ? check_bytes_and_report.constprop.0+0x48/0x120
>  ? check_object+0xb5/0x3a0
>  ? find_held_lock+0x2b/0x80
>  __sys_sendmsg+0x50/0x90
>  do_syscall_64+0x4b/0x110
>  entry_SYSCALL_64_after_hwframe+0x76/0x7e
> RIP: 0033:0x7fcf423c7f03
> Code: 64 89 02 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00
> 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 2e 00 00 00 08
> RSP: 002b:00007ffcbfa59528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcf423c7f03
> RDX: 0000000000000000 RSI: 00007ffcbfa59590 RDI: 0000000000000003
> RBP: 0000000066907e78 R08: 0000000000000001 R09: 00007fcf42499be0
> R10: 0000000000000076 R11: 0000000000000246 R12: 0000000000000001
> R13: 00007ffcbfa59660 R14: 0000000000000000 R15: 00005596d6088020
>  </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:dql_completed+0x212/0x230
> Code: 41 1c 01 48 89 57 58 e9 85 fe ff ff 85 ed 40 0f 95 c5 41 39 d8 0f
> 95 c1 40 84 cd 74 05 45 85 e4 78 0a 44 89 d9 e9 67 fe fe
> RSP: 0018:ffffc900000f0d70 EFLAGS: 00000213
> RAX: 0000000000000000 RBX: ffff88800413b800 RCX: ffff888005925240
> RDX: 0000000000000000 RSI: 0000000081df1116 RDI: ffff888003a0d700
> RBP: ffff888003a0d600 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: ffff88800a403c90 R12: 0000000000000001
> R13: ffffc900000f0db0 R14: ffff888003a0d680 R15: ffff88803cc80000
> FS:  00007fcf4229f1c0(0000) GS:ffff88803cc80000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00005596d60d1290 CR3: 00000000093c0000 CR4: 00000000000006f0
> Kernel panic - not syncing: Fatal exception in interrupt
> Kernel Offset: disabled
> ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---
>