Bug 10919 - ipvs: avoid stat macros calls from preemptible context
Summary: ipvs: avoid stat macros calls from preemptible context
Status: NEW
Alias: None
Product: Anolis OS 8
Classification: Anolis OS
Component: kernel - anck-5.10 (show other bugs) kernel - anck-5.10
Version: 8.2
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: maqiao_mq
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-09-24 10:17 UTC by ymm
Modified: 2024-09-24 10:25 UTC (History)
0 users

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description ymm inspur_group 2024-09-24 10:17:35 UTC 
Description of problem:

    Inside decrement_ttl() upon discovering that the packet ttl has exceeded,
    __IP_INC_STATS and __IP6_INC_STATS macros can be called from preemptible
    context having the following backtrace:

    check_preemption_disabled: 48 callbacks suppressed
    BUG: using __this_cpu_add() in preemptible [00000000] code: curl/1177
    caller is decrement_ttl+0x217/0x830
    CPU: 5 PID: 1177 Comm: curl Not tainted 6.7.0+ #34
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 04/01/2014
    Call Trace:
     <TASK>
     dump_stack_lvl+0xbd/0xe0
     check_preemption_disabled+0xd1/0xe0
     decrement_ttl+0x217/0x830
     __ip_vs_get_out_rt+0x4e0/0x1ef0
     ip_vs_nat_xmit+0x205/0xcd0
     ip_vs_in_hook+0x9b1/0x26a0
     nf_hook_slow+0xc2/0x210
     nf_hook+0x1fb/0x770
     __ip_local_out+0x33b/0x640
     ip_local_out+0x2a/0x490
     __ip_queue_xmit+0x990/0x1d10
     __tcp_transmit_skb+0x288b/0x3d10
     tcp_connect+0x3466/0x5180
     tcp_v4_connect+0x1535/0x1bb0
     __inet_stream_connect+0x40d/0x1040
     inet_stream_connect+0x57/0xa0
     __sys_connect_file+0x162/0x1a0
     __sys_connect+0x137/0x160
     __x64_sys_connect+0x72/0xb0
     do_syscall_64+0x6f/0x140
     entry_SYSCALL_64_after_hwframe+0x6e/0x76
    RIP: 0033:0x7fe6dbbc34e0
Comment 1 小龙 admin 2024-09-24 10:25:20 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/3854