* Re: [PATCH net-next 16/24] net: netkit, veth, tun, virt*: Use nested-BH locking for XDP redirect.
[not found] <20231215171020.687342-17-bigeasy@linutronix.de>
@ 2023-12-16 19:28 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-12-16 19:28 UTC (permalink / raw)
To: Sebastian Andrzej Siewior, linux-kernel, netdev
Cc: llvm, oe-kbuild-all, Boqun Feng, Daniel Borkmann, Eric Dumazet,
Frederic Weisbecker, Ingo Molnar, Jakub Kicinski, Paolo Abeni,
Peter Zijlstra, Thomas Gleixner, Waiman Long, Will Deacon,
Sebastian Andrzej Siewior, K. Y. Srinivasan, Michael S. Tsirkin,
Alexei Starovoitov, Andrii Nakryiko, Dexuan Cui, Haiyang Zhang,
Hao Luo, Jesper Dangaard Brouer, Jiri Olsa, John Fastabend,
Juergen Gross, KP Singh, Martin KaFai Lau, Nikolay Aleksandrov,
Song Liu, Stanislav Fomichev
Hi Sebastian,
kernel test robot noticed the following build errors:
[auto build test ERROR on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Sebastian-Andrzej-Siewior/locking-local_lock-Introduce-guard-definition-for-local_lock/20231216-011911
base: net-next/main
patch link: https://lore.kernel.org/r/20231215171020.687342-17-bigeasy%40linutronix.de
patch subject: [PATCH net-next 16/24] net: netkit, veth, tun, virt*: Use nested-BH locking for XDP redirect.
config: x86_64-rhel-8.3-bpf (https://download.01.org/0day-ci/archive/20231217/202312170350.n7ssgNDP-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231217/202312170350.n7ssgNDP-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312170350.n7ssgNDP-lkp@intel.com/
All errors (new ones prefixed by >>):
>> drivers/net/hyperv/netvsc_bpf.c:53:3: error: cannot jump from this goto statement to its label
goto out;
^
drivers/net/hyperv/netvsc_bpf.c:61:2: note: jump bypasses initialization of variable with __attribute__((cleanup))
guard(local_lock_nested_bh)(&bpf_run_lock.redirect_lock);
^
include/linux/cleanup.h:142:15: note: expanded from macro 'guard'
CLASS(_name, __UNIQUE_ID(guard))
^
include/linux/compiler.h:180:29: note: expanded from macro '__UNIQUE_ID'
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
^
include/linux/compiler_types.h:84:22: note: expanded from macro '__PASTE'
#define __PASTE(a,b) ___PASTE(a,b)
^
include/linux/compiler_types.h:83:23: note: expanded from macro '___PASTE'
#define ___PASTE(a,b) a##b
^
<scratch space>:81:1: note: expanded from here
__UNIQUE_ID_guard635
^
drivers/net/hyperv/netvsc_bpf.c:46:3: error: cannot jump from this goto statement to its label
goto out;
^
drivers/net/hyperv/netvsc_bpf.c:61:2: note: jump bypasses initialization of variable with __attribute__((cleanup))
guard(local_lock_nested_bh)(&bpf_run_lock.redirect_lock);
^
include/linux/cleanup.h:142:15: note: expanded from macro 'guard'
CLASS(_name, __UNIQUE_ID(guard))
^
include/linux/compiler.h:180:29: note: expanded from macro '__UNIQUE_ID'
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
^
include/linux/compiler_types.h:84:22: note: expanded from macro '__PASTE'
#define __PASTE(a,b) ___PASTE(a,b)
^
include/linux/compiler_types.h:83:23: note: expanded from macro '___PASTE'
#define ___PASTE(a,b) a##b
^
<scratch space>:81:1: note: expanded from here
__UNIQUE_ID_guard635
^
drivers/net/hyperv/netvsc_bpf.c:41:3: error: cannot jump from this goto statement to its label
goto out;
^
drivers/net/hyperv/netvsc_bpf.c:61:2: note: jump bypasses initialization of variable with __attribute__((cleanup))
guard(local_lock_nested_bh)(&bpf_run_lock.redirect_lock);
^
include/linux/cleanup.h:142:15: note: expanded from macro 'guard'
CLASS(_name, __UNIQUE_ID(guard))
^
include/linux/compiler.h:180:29: note: expanded from macro '__UNIQUE_ID'
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
^
include/linux/compiler_types.h:84:22: note: expanded from macro '__PASTE'
#define __PASTE(a,b) ___PASTE(a,b)
^
include/linux/compiler_types.h:83:23: note: expanded from macro '___PASTE'
#define ___PASTE(a,b) a##b
^
<scratch space>:81:1: note: expanded from here
__UNIQUE_ID_guard635
^
3 errors generated.
vim +53 drivers/net/hyperv/netvsc_bpf.c
351e1581395fcc Haiyang Zhang 2020-01-23 23
351e1581395fcc Haiyang Zhang 2020-01-23 24 u32 netvsc_run_xdp(struct net_device *ndev, struct netvsc_channel *nvchan,
351e1581395fcc Haiyang Zhang 2020-01-23 25 struct xdp_buff *xdp)
351e1581395fcc Haiyang Zhang 2020-01-23 26 {
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 27 struct netvsc_stats_rx *rx_stats = &nvchan->rx_stats;
351e1581395fcc Haiyang Zhang 2020-01-23 28 void *data = nvchan->rsc.data[0];
351e1581395fcc Haiyang Zhang 2020-01-23 29 u32 len = nvchan->rsc.len[0];
351e1581395fcc Haiyang Zhang 2020-01-23 30 struct page *page = NULL;
351e1581395fcc Haiyang Zhang 2020-01-23 31 struct bpf_prog *prog;
351e1581395fcc Haiyang Zhang 2020-01-23 32 u32 act = XDP_PASS;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 33 bool drop = true;
351e1581395fcc Haiyang Zhang 2020-01-23 34
351e1581395fcc Haiyang Zhang 2020-01-23 35 xdp->data_hard_start = NULL;
351e1581395fcc Haiyang Zhang 2020-01-23 36
351e1581395fcc Haiyang Zhang 2020-01-23 37 rcu_read_lock();
351e1581395fcc Haiyang Zhang 2020-01-23 38 prog = rcu_dereference(nvchan->bpf_prog);
351e1581395fcc Haiyang Zhang 2020-01-23 39
351e1581395fcc Haiyang Zhang 2020-01-23 40 if (!prog)
351e1581395fcc Haiyang Zhang 2020-01-23 41 goto out;
351e1581395fcc Haiyang Zhang 2020-01-23 42
505e3f00c3f364 Andrea Parri (Microsoft 2021-01-14 43) /* Ensure that the below memcpy() won't overflow the page buffer. */
505e3f00c3f364 Andrea Parri (Microsoft 2021-01-14 44) if (len > ndev->mtu + ETH_HLEN) {
505e3f00c3f364 Andrea Parri (Microsoft 2021-01-14 45) act = XDP_DROP;
505e3f00c3f364 Andrea Parri (Microsoft 2021-01-14 46) goto out;
505e3f00c3f364 Andrea Parri (Microsoft 2021-01-14 47) }
505e3f00c3f364 Andrea Parri (Microsoft 2021-01-14 48)
351e1581395fcc Haiyang Zhang 2020-01-23 49 /* allocate page buffer for data */
351e1581395fcc Haiyang Zhang 2020-01-23 50 page = alloc_page(GFP_ATOMIC);
351e1581395fcc Haiyang Zhang 2020-01-23 51 if (!page) {
351e1581395fcc Haiyang Zhang 2020-01-23 52 act = XDP_DROP;
351e1581395fcc Haiyang Zhang 2020-01-23 @53 goto out;
351e1581395fcc Haiyang Zhang 2020-01-23 54 }
351e1581395fcc Haiyang Zhang 2020-01-23 55
43b5169d8355cc Lorenzo Bianconi 2020-12-22 56 xdp_init_buff(xdp, PAGE_SIZE, &nvchan->xdp_rxq);
be9df4aff65f18 Lorenzo Bianconi 2020-12-22 57 xdp_prepare_buff(xdp, page_address(page), NETVSC_XDP_HDRM, len, false);
351e1581395fcc Haiyang Zhang 2020-01-23 58
351e1581395fcc Haiyang Zhang 2020-01-23 59 memcpy(xdp->data, data, len);
351e1581395fcc Haiyang Zhang 2020-01-23 60
31dbfc0f055c7d Sebastian Andrzej Siewior 2023-12-15 61 guard(local_lock_nested_bh)(&bpf_run_lock.redirect_lock);
351e1581395fcc Haiyang Zhang 2020-01-23 62 act = bpf_prog_run_xdp(prog, xdp);
351e1581395fcc Haiyang Zhang 2020-01-23 63
351e1581395fcc Haiyang Zhang 2020-01-23 64 switch (act) {
351e1581395fcc Haiyang Zhang 2020-01-23 65 case XDP_PASS:
351e1581395fcc Haiyang Zhang 2020-01-23 66 case XDP_TX:
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 67 drop = false;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 68 break;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 69
351e1581395fcc Haiyang Zhang 2020-01-23 70 case XDP_DROP:
351e1581395fcc Haiyang Zhang 2020-01-23 71 break;
351e1581395fcc Haiyang Zhang 2020-01-23 72
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 73 case XDP_REDIRECT:
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 74 if (!xdp_do_redirect(ndev, xdp, prog)) {
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 75 nvchan->xdp_flush = true;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 76 drop = false;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 77
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 78 u64_stats_update_begin(&rx_stats->syncp);
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 79
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 80 rx_stats->xdp_redirect++;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 81 rx_stats->packets++;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 82 rx_stats->bytes += nvchan->rsc.pktlen;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 83
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 84 u64_stats_update_end(&rx_stats->syncp);
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 85
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 86 break;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 87 } else {
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 88 u64_stats_update_begin(&rx_stats->syncp);
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 89 rx_stats->xdp_drop++;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 90 u64_stats_update_end(&rx_stats->syncp);
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 91 }
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 92
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 93 fallthrough;
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 94
351e1581395fcc Haiyang Zhang 2020-01-23 95 case XDP_ABORTED:
351e1581395fcc Haiyang Zhang 2020-01-23 96 trace_xdp_exception(ndev, prog, act);
351e1581395fcc Haiyang Zhang 2020-01-23 97 break;
351e1581395fcc Haiyang Zhang 2020-01-23 98
351e1581395fcc Haiyang Zhang 2020-01-23 99 default:
c8064e5b4adac5 Paolo Abeni 2021-11-30 100 bpf_warn_invalid_xdp_action(ndev, prog, act);
351e1581395fcc Haiyang Zhang 2020-01-23 101 }
351e1581395fcc Haiyang Zhang 2020-01-23 102
351e1581395fcc Haiyang Zhang 2020-01-23 103 out:
351e1581395fcc Haiyang Zhang 2020-01-23 104 rcu_read_unlock();
351e1581395fcc Haiyang Zhang 2020-01-23 105
1cb9d3b6185b2a Haiyang Zhang 2022-04-07 106 if (page && drop) {
351e1581395fcc Haiyang Zhang 2020-01-23 107 __free_page(page);
351e1581395fcc Haiyang Zhang 2020-01-23 108 xdp->data_hard_start = NULL;
351e1581395fcc Haiyang Zhang 2020-01-23 109 }
351e1581395fcc Haiyang Zhang 2020-01-23 110
351e1581395fcc Haiyang Zhang 2020-01-23 111 return act;
351e1581395fcc Haiyang Zhang 2020-01-23 112 }
351e1581395fcc Haiyang Zhang 2020-01-23 113
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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[not found] <20231215171020.687342-17-bigeasy@linutronix.de>
2023-12-16 19:28 ` [PATCH net-next 16/24] net: netkit, veth, tun, virt*: Use nested-BH locking for XDP redirect kernel test robot
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