arch/xtensa/kernel/entry.S:1436:(.exception.text+0x233): dangerous relocation: windowed longcall crosses 1GB boundary; return may fail: make_task_dead

arch/xtensa/kernel/entry.S:1436:(.exception.text+0x233): dangerous relocation: windowed longcall crosses 1GB boundary; return may fail: make_task_dead

[kernel test robot]

:::::: 
:::::: Manual check reason: "xtensa: dangerous relocation"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Arnd Bergmann <arnd@arndb.de>
CC: Hans Verkuil <hverkuil@xs4all.nl>

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   211ddde0823f1442e4ad052a2f30f050145ccada
commit: 8d46603eeeb4c6abff1d2e49f2a6ae289dac765e media: cxd2841er: fix 64-bit division on gcc-9
date:   11 months ago
:::::: branch date: 2 hours ago
:::::: commit date: 11 months ago
config: xtensa-randconfig-002-20251020 (https://download.01.org/0day-ci/archive/20251020/202510201147.QigCaeXP-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251020/202510201147.QigCaeXP-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/r/202510201147.QigCaeXP-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/xtensa/kernel/entry.o: in function `fast_syscall_spill_registers':
>> arch/xtensa/kernel/entry.S:1436:(.exception.text+0x233): dangerous relocation: windowed longcall crosses 1GB boundary; return may fail: make_task_dead


vim +1436 arch/xtensa/kernel/entry.S

6b5a1f74e50170e Chris Zankel      2014-01-28  1413  
6b5a1f74e50170e Chris Zankel      2014-01-28  1414  	/* We get here because of an unrecoverable error in the window
6b5a1f74e50170e Chris Zankel      2014-01-28  1415  	 * registers, so set up a dummy frame and kill the user application.
6b5a1f74e50170e Chris Zankel      2014-01-28  1416  	 * Note: We assume EXC_TABLE_KSTK contains a valid stack pointer.
6b5a1f74e50170e Chris Zankel      2014-01-28  1417  	 */
6b5a1f74e50170e Chris Zankel      2014-01-28  1418  
6b5a1f74e50170e Chris Zankel      2014-01-28  1419  	movi	a0, 1
6b5a1f74e50170e Chris Zankel      2014-01-28  1420  	movi	a1, 0
6b5a1f74e50170e Chris Zankel      2014-01-28  1421  
6b5a1f74e50170e Chris Zankel      2014-01-28  1422  	wsr	a0, windowstart
6b5a1f74e50170e Chris Zankel      2014-01-28  1423  	wsr	a1, windowbase
6b5a1f74e50170e Chris Zankel      2014-01-28  1424  	rsync
6b5a1f74e50170e Chris Zankel      2014-01-28  1425  
6b5a1f74e50170e Chris Zankel      2014-01-28  1426  	movi	a0, 0
6b5a1f74e50170e Chris Zankel      2014-01-28  1427  
6b5a1f74e50170e Chris Zankel      2014-01-28  1428  	rsr	a3, excsave1
6b5a1f74e50170e Chris Zankel      2014-01-28  1429  	l32i	a1, a3, EXC_TABLE_KSTK
6b5a1f74e50170e Chris Zankel      2014-01-28  1430  
0b5372570b1f3fc Max Filippov      2021-05-01  1431  	movi	a4, KERNEL_PS_WOE_MASK | LOCKLEVEL
6b5a1f74e50170e Chris Zankel      2014-01-28  1432  	wsr	a4, ps
6b5a1f74e50170e Chris Zankel      2014-01-28  1433  	rsync
6b5a1f74e50170e Chris Zankel      2014-01-28  1434  
0b5372570b1f3fc Max Filippov      2021-05-01  1435  	movi	abi_arg0, SIGSEGV
85be9ae7b630928 Eric W. Biederman 2022-01-05 @1436  	abi_call	make_task_dead
6b5a1f74e50170e Chris Zankel      2014-01-28  1437  
6b5a1f74e50170e Chris Zankel      2014-01-28  1438  	/* shouldn't return, so panic */
6b5a1f74e50170e Chris Zankel      2014-01-28  1439  
6b5a1f74e50170e Chris Zankel      2014-01-28  1440  	wsr	a0, excsave1
2da03d4114b2587 Max Filippov      2017-12-09  1441  	call0	unrecoverable_exception		# should not return
6b5a1f74e50170e Chris Zankel      2014-01-28  1442  1:	j	1b
6b5a1f74e50170e Chris Zankel      2014-01-28  1443  
6b5a1f74e50170e Chris Zankel      2014-01-28  1444  

:::::: The code at line 1436 was first introduced by commit
:::::: 85be9ae7b63092895b6e7ac87a3ef383c679866c exit/xtensa: In arch/xtensa/entry.S:Linvalid_mask call make_task_dead

:::::: TO: Eric W. Biederman <ebiederm@xmission.com>
:::::: CC: Eric W. Biederman <ebiederm@xmission.com>

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