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Message-ID: <202506240921.WNcmLMhg-lkp@intel.com>
Date: Tue, 24 Jun 2025 09:36:25 +0800
From: kernel test robot <lkp@...el.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
Toke Høiland-Jørgensen <toke@...hat.com>
Subject: net/bpf/test_run.c:370:12: warning: stack frame size (1152) exceeds
limit (1024) in 'bpf_test_run_xdp_live'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 78f4e737a53e1163ded2687a922fce138aee73f5
commit: 3f9fe37d9e16a6cfd5f4d1f536686ea71db3196f net: Move per-CPU flush-lists to bpf_net_context on PREEMPT_RT.
date: 12 months ago
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20250624/202506240921.WNcmLMhg-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 875b36a8742437b95f623bab1e0332562c7b4b3f)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250624/202506240921.WNcmLMhg-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506240921.WNcmLMhg-lkp@intel.com/
All warnings (new ones prefixed by >>):
include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
include/linux/vmstat.h:519:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
519 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
520 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:528:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
528 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
529 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
In file included from net/bpf/test_run.c:17:
In file included from include/net/tcp.h:32:
In file included from include/net/inet_hashtables.h:26:
include/net/ip.h:472:14: warning: default initialization of an object of type 'typeof (rt->dst.expires)' (aka 'const unsigned long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
472 | if (mtu && time_before(jiffies, rt->dst.expires))
| ^
include/linux/jiffies.h:138:26: note: expanded from macro 'time_before'
138 | #define time_before(a,b) time_after(b,a)
| ^
include/linux/jiffies.h:128:3: note: expanded from macro 'time_after'
128 | (typecheck(unsigned long, a) && \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:451:26: warning: default initialization of an object of type 'typeof ((kattr->test.data_out))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
451 | void __user *data_out = u64_to_user_ptr(kattr->test.data_out);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:658:25: warning: default initialization of an object of type 'typeof ((kattr->test.data_in))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
658 | void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:755:24: warning: default initialization of an object of type 'typeof ((kattr->test.ctx_in))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
755 | void __user *ctx_in = u64_to_user_ptr(kattr->test.ctx_in);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:811:25: warning: default initialization of an object of type 'typeof ((kattr->test.ctx_in))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
811 | void __user *data_in = u64_to_user_ptr(kattr->test.ctx_in);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:812:26: warning: default initialization of an object of type 'typeof ((kattr->test.ctx_out))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
812 | void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:844:26: warning: default initialization of an object of type 'typeof ((kattr->test.ctx_out))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
844 | void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:1251:26: warning: default initialization of an object of type 'typeof ((kattr->test.data_in))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
1251 | void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
net/bpf/test_run.c:1508:24: warning: default initialization of an object of type 'typeof ((kattr->test.ctx_in))' (aka 'const unsigned long long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
1508 | void __user *ctx_in = u64_to_user_ptr(kattr->test.ctx_in);
| ^
include/linux/kernel.h:52:2: note: expanded from macro 'u64_to_user_ptr'
52 | typecheck(u64, (x)); \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
>> net/bpf/test_run.c:370:12: warning: stack frame size (1152) exceeds limit (1024) in 'bpf_test_run_xdp_live' [-Wframe-larger-than]
370 | static int bpf_test_run_xdp_live(struct bpf_prog *prog, struct xdp_buff *ctx,
| ^
15 warnings generated.
vim +/bpf_test_run_xdp_live +370 net/bpf/test_run.c
b530e9e1063ed2 Toke Høiland-Jørgensen 2022-03-09 369
b530e9e1063ed2 Toke Høiland-Jørgensen 2022-03-09 @370 static int bpf_test_run_xdp_live(struct bpf_prog *prog, struct xdp_buff *ctx,
b530e9e1063ed2 Toke Høiland-Jørgensen 2022-03-09 371 u32 repeat, u32 batch_size, u32 *time)
b530e9e1063ed2 Toke Høiland-Jørgensen 2022-03-09 372
:::::: The code at line 370 was first introduced by commit
:::::: b530e9e1063ed2b817eae7eec6ed2daa8be11608 bpf: Add "live packet" mode for XDP in BPF_PROG_RUN
:::::: TO: Toke Høiland-Jørgensen <toke@...hat.com>
:::::: CC: Alexei Starovoitov <ast@...nel.org>
--
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https://github.com/intel/lkp-tests/wiki
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