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Date: Tue, 20 Jul 2021 21:09:04 +0800
From: kernel test robot <lkp@...el.com>
To: "Christopher M. Riedl" <cmr@...ormatik.wtf>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Michael Ellerman <mpe@...erman.id.au>,
Sasha Levin <sashal@...nel.org>
Subject: [linux-stable-rc:linux-5.4.y 5527/5583]
arch/powerpc/xmon/xmon.c:489:6: error: variable 'cmd' might be clobbered by
'longjmp' or 'vfork'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y
head: 12a5ce113626ce8208aef76d4d2e9fc93ea48ddf
commit: 99c63ba21d2ea9d28880b0341b25e4a4ce8a18bb [5527/5583] powerpc/xmon: Restrict when kernel is locked down
config: powerpc64-randconfig-r002-20210720 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 10.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=99c63ba21d2ea9d28880b0341b25e4a4ce8a18bb
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc linux-5.4.y
git checkout 99c63ba21d2ea9d28880b0341b25e4a4ce8a18bb
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
In file included from arch/powerpc/xmon/xmon.c:64:
arch/powerpc/xmon/dis-asm.h: In function 'print_insn_powerpc':
arch/powerpc/xmon/dis-asm.h:16:13: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Werror=format=]
16 | printf("%.8x", insn);
| ~~~^ ~~~~
| | |
| | long unsigned int
| unsigned int
| %.8lx
arch/powerpc/xmon/dis-asm.h: In function 'print_insn_spu':
arch/powerpc/xmon/dis-asm.h:22:13: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Werror=format=]
22 | printf("%.8x", insn);
| ~~~^ ~~~~
| | |
| | long unsigned int
| unsigned int
| %.8lx
arch/powerpc/xmon/xmon.c: In function 'xmon_print_symbol':
arch/powerpc/xmon/xmon.c:3535:14: error: variable 'name' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
3535 | const char *name = NULL;
| ^~~~
arch/powerpc/xmon/xmon.c: In function 'show_pte':
arch/powerpc/xmon/xmon.c:3121:22: error: variable 'tsk' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
3121 | struct task_struct *tsk = NULL;
| ^~~
arch/powerpc/xmon/xmon.c: In function 'show_tasks':
arch/powerpc/xmon/xmon.c:3217:22: error: variable 'tsk' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
3217 | struct task_struct *tsk = NULL;
| ^~~
arch/powerpc/xmon/xmon.c: In function 'xmon_core':
>> arch/powerpc/xmon/xmon.c:489:6: error: variable 'cmd' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
489 | int cmd = 0;
| ^~~
arch/powerpc/xmon/xmon.c:848:14: error: variable 'bp' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
848 | struct bpt *bp;
| ^~
arch/powerpc/xmon/xmon.c:848:14: error: variable 'bp' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
arch/powerpc/xmon/xmon.c:487:48: error: argument 'fromipi' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
487 | static int xmon_core(struct pt_regs *regs, int fromipi)
| ~~~~^~~~~~~
cc1: all warnings being treated as errors
vim +489 arch/powerpc/xmon/xmon.c
daf8f40391b2a1 arch/powerpc/xmon/xmon.c Josh Boyer 2009-09-23 486
b0da985644faa4 arch/powerpc/xmon/xmon.c Arnd Bergmann 2006-01-11 487 static int xmon_core(struct pt_regs *regs, int fromipi)
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 488 {
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 @489 int cmd = 0;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 490 struct bpt *bp;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 491 long recurse_jmp[JMP_BUF_LEN];
99c63ba21d2ea9 arch/powerpc/xmon/xmon.c Christopher M. Riedl 2019-09-07 492 bool locked_down;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 493 unsigned long offset;
f13659e0b39075 arch/powerpc/xmon/xmon.c Anton Blanchard 2007-03-21 494 unsigned long flags;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 495 #ifdef CONFIG_SMP
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 496 int cpu;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 497 int secondary;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 498 #endif
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 499
f13659e0b39075 arch/powerpc/xmon/xmon.c Anton Blanchard 2007-03-21 500 local_irq_save(flags);
a71d64b4dc4067 arch/powerpc/xmon/xmon.c Anton Blanchard 2014-08-05 501 hard_irq_disable();
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 502
99c63ba21d2ea9 arch/powerpc/xmon/xmon.c Christopher M. Riedl 2019-09-07 503 locked_down = xmon_is_locked_down();
99c63ba21d2ea9 arch/powerpc/xmon/xmon.c Christopher M. Riedl 2019-09-07 504
aaf06665f7ea3e arch/powerpc/xmon/xmon.c Naveen N. Rao 2019-06-27 505 if (!fromipi) {
ed49f7fd6438dc arch/powerpc/xmon/xmon.c Breno Leitao 2017-08-02 506 tracing_enabled = tracing_is_on();
ed49f7fd6438dc arch/powerpc/xmon/xmon.c Breno Leitao 2017-08-02 507 tracing_off();
aaf06665f7ea3e arch/powerpc/xmon/xmon.c Naveen N. Rao 2019-06-27 508 }
ed49f7fd6438dc arch/powerpc/xmon/xmon.c Breno Leitao 2017-08-02 509
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 510 bp = in_breakpoint_table(regs->nip, &offset);
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 511 if (bp != NULL) {
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 512 regs->nip = bp->address + offset;
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 513 atomic_dec(&bp->ref_count);
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 514 }
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 515
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 516 remove_cpu_bpts();
^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 517
:::::: The code at line 489 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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