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Message-ID: <Yo9Fm/hdtac1t9sW@debian.me>
Date: Thu, 26 May 2022 16:17:15 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: linuxppc-dev@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org, Petr Mladek <pmladek@...e.com>,
Sergey Senozhatsky <senozhatsky@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
John Ogness <john.ogness@...utronix.de>,
Michael Ellerman <mpe@...erman.id.au>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
David Howells <dhowells@...hat.com>
Subject: dangling pointer to '__str' error on ppc64_defconfig, GCC 12.1.0
Hi everyone,
Attempting to build ppc64_defconfig kernel with powerpc64-unknown-linux-gnu
(GCC 12.1.0) on v5.18, I got build error on ftrace.o:
CC arch/powerpc/kernel/trace/ftrace.o
CC init/init_task.o
In file included from ./include/asm-generic/bug.h:22,
from ./arch/powerpc/include/asm/bug.h:156,
from ./include/linux/bug.h:5,
from ./include/linux/thread_info.h:13,
from ./include/asm-generic/preempt.h:5,
from ./arch/powerpc/include/generated/asm/preempt.h:1,
from ./include/linux/preempt.h:78,
from ./include/linux/spinlock.h:55,
from arch/powerpc/kernel/trace/ftrace.c:16:
arch/powerpc/kernel/trace/ftrace.c: In function 'ftrace_modify_code':
./include/linux/printk.h:446:44: error: using a dangling pointer to '__str' [-Werror=dangling-pointer=]
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^
./include/linux/printk.h:418:17: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:75:17: note: in expansion of macro 'pr_err'
75 | pr_err("%p: replaced (%s) != old (%s)",
| ^~~~~~
In file included from ./arch/powerpc/include/asm/code-patching.h:14,
from arch/powerpc/kernel/trace/ftrace.c:26:
./arch/powerpc/include/asm/inst.h:156:14: note: '__str' declared here
156 | char __str[PPC_INST_STR_LEN]; \
| ^~~~~
./include/linux/printk.h:418:33: note: in expansion of macro 'ppc_inst_as_str'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/printk.h:446:26: note: in expansion of macro 'printk_index_wrap'
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:75:17: note: in expansion of macro 'pr_err'
75 | pr_err("%p: replaced (%s) != old (%s)",
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c: In function '__ftrace_make_nop_kernel':
./include/linux/printk.h:446:44: error: using a dangling pointer to '__str' [-Werror=dangling-pointer=]
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^
./include/linux/printk.h:418:17: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:379:17: note: in expansion of macro 'pr_err'
379 | pr_err("Not expected bl: opcode is %s\n", ppc_inst_as_str(op));
| ^~~~~~
./arch/powerpc/include/asm/inst.h:156:14: note: '__str' declared here
156 | char __str[PPC_INST_STR_LEN]; \
| ^~~~~
./include/linux/printk.h:418:33: note: in expansion of macro 'ppc_inst_as_str'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/printk.h:446:26: note: in expansion of macro 'printk_index_wrap'
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:379:17: note: in expansion of macro 'pr_err'
379 | pr_err("Not expected bl: opcode is %s\n", ppc_inst_as_str(op));
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c: In function '__ftrace_make_call_kernel':
./include/linux/printk.h:446:44: error: using a dangling pointer to '__str' [-Werror=dangling-pointer=]
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^
./include/linux/printk.h:418:17: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:638:17: note: in expansion of macro 'pr_err'
638 | pr_err("Unexpected call sequence at %p: %s\n", ip, ppc_inst_as_str(op));
| ^~~~~~
./arch/powerpc/include/asm/inst.h:156:14: note: '__str' declared here
156 | char __str[PPC_INST_STR_LEN]; \
| ^~~~~
./include/linux/printk.h:418:33: note: in expansion of macro 'ppc_inst_as_str'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/printk.h:446:26: note: in expansion of macro 'printk_index_wrap'
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:638:17: note: in expansion of macro 'pr_err'
638 | pr_err("Unexpected call sequence at %p: %s\n", ip, ppc_inst_as_str(op));
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c: In function '__ftrace_make_nop':
./include/linux/printk.h:446:44: error: using a dangling pointer to '__str' [-Werror=dangling-pointer=]
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^
./include/linux/printk.h:418:17: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:205:17: note: in expansion of macro 'pr_err'
205 | pr_err("Expected %08lx found %s\n", PPC_INST_LD_TOC, ppc_inst_as_str(op));
| ^~~~~~
./arch/powerpc/include/asm/inst.h:156:14: note: '__str' declared here
156 | char __str[PPC_INST_STR_LEN]; \
| ^~~~~
./include/linux/printk.h:418:33: note: in expansion of macro 'ppc_inst_as_str'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/printk.h:446:26: note: in expansion of macro 'printk_index_wrap'
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:205:17: note: in expansion of macro 'pr_err'
205 | pr_err("Expected %08lx found %s\n", PPC_INST_LD_TOC, ppc_inst_as_str(op));
| ^~~~~~
./include/linux/printk.h:446:44: error: using a dangling pointer to '__str' [-Werror=dangling-pointer=]
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^
./include/linux/printk.h:418:17: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:139:17: note: in expansion of macro 'pr_err'
139 | pr_err("Not expected bl: opcode is %s\n", ppc_inst_as_str(op));
| ^~~~~~
./arch/powerpc/include/asm/inst.h:156:14: note: '__str' declared here
156 | char __str[PPC_INST_STR_LEN]; \
| ^~~~~
./include/linux/printk.h:418:33: note: in expansion of macro 'ppc_inst_as_str'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/printk.h:446:26: note: in expansion of macro 'printk_index_wrap'
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:139:17: note: in expansion of macro 'pr_err'
139 | pr_err("Not expected bl: opcode is %s\n", ppc_inst_as_str(op));
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c: In function '__ftrace_make_call':
./include/linux/printk.h:446:44: error: using a dangling pointer to '__str' [-Werror=dangling-pointer=]
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^
./include/linux/printk.h:418:17: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:506:17: note: in expansion of macro 'pr_err'
506 | pr_err("Unexpected call sequence at %p: %s %s\n",
| ^~~~~~
./arch/powerpc/include/asm/inst.h:156:14: note: '__str' declared here
156 | char __str[PPC_INST_STR_LEN]; \
| ^~~~~
./include/linux/printk.h:418:33: note: in expansion of macro 'ppc_inst_as_str'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
./include/linux/printk.h:446:26: note: in expansion of macro 'printk_index_wrap'
446 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
./include/linux/printk.h:489:9: note: in expansion of macro 'printk'
489 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~
arch/powerpc/kernel/trace/ftrace.c:506:17: note: in expansion of macro 'pr_err'
506 | pr_err("Unexpected call sequence at %p: %s %s\n",
| ^~~~~~
cc1: all warnings being treated as errors
make[3]: *** [scripts/Makefile.build:288: arch/powerpc/kernel/trace/ftrace.o] Error 1
I also hit this error on current master (commit babf0bb978e3c9
("Merge tag 'xfs-5.19-for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux")).
Thanks.
Reported-by: Bagas Sanjaya <bagasdotme@...il.com>
--
An old man doll... just what I always wanted! - Clara
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