* Re: [PATCH v16 14/27] riscv: Implements arch agnostic indirect branch tracking prctls
[not found] <20250522-v5_user_cfi_series-v16-14-64f61a35eee7@rivosinc.com>
@ 2025-05-23 23:06 ` kernel test robot
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From: kernel test robot @ 2025-05-23 23:06 UTC (permalink / raw)
To: Deepak Gupta, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
Dave Hansen, x86, H. Peter Anvin, Andrew Morton, Liam R. Howlett,
Vlastimil Babka, Lorenzo Stoakes, Paul Walmsley, Palmer Dabbelt,
Albert Ou, Conor Dooley, Rob Herring, Krzysztof Kozlowski,
Arnd Bergmann, Christian Brauner, Peter Zijlstra, Oleg Nesterov,
Eric Biederman, Kees Cook, Jonathan Corbet, Shuah Khan, Jann Horn,
Miguel Ojeda, Alex Gaynor, Boqun Feng, Gary Guo
Cc: llvm, oe-kbuild-all, Linux Memory Management List
Hi Deepak,
kernel test robot noticed the following build errors:
[auto build test ERROR on 4181f8ad7a1061efed0219951d608d4988302af7]
url: https://github.com/intel-lab-lkp/linux/commits/Deepak-Gupta/mm-VM_SHADOW_STACK-definition-for-riscv/20250523-133343
base: 4181f8ad7a1061efed0219951d608d4988302af7
patch link: https://lore.kernel.org/r/20250522-v5_user_cfi_series-v16-14-64f61a35eee7%40rivosinc.com
patch subject: [PATCH v16 14/27] riscv: Implements arch agnostic indirect branch tracking prctls
config: riscv-randconfig-001-20250524 (https://download.01.org/0day-ci/archive/20250524/202505240659.OGVR0xHg-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250524/202505240659.OGVR0xHg-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/202505240659.OGVR0xHg-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/riscv/kernel/entry.S:172:9: error: immediate must be an integer in the range [-2147483648, 4294967295]
li t0, 0x00040000 | (0x00006000 | 0x00000600) | 0x020000000000
^
vim +172 arch/riscv/kernel/entry.S
155
156 .Lsave_context:
157 REG_S sp, TASK_TI_USER_SP(tp)
158 REG_L sp, TASK_TI_KERNEL_SP(tp)
159 addi sp, sp, -(PT_SIZE_ON_STACK)
160 REG_S x1, PT_RA(sp)
161 REG_S x3, PT_GP(sp)
162 REG_S x5, PT_T0(sp)
163 save_from_x6_to_x31
164
165 /*
166 * Disable user-mode memory access as it should only be set in the
167 * actual user copy routines.
168 *
169 * Disable the FPU/Vector to detect illegal usage of floating point
170 * or vector in kernel space.
171 */
> 172 li t0, SR_SUM | SR_FS_VS | SR_ELP
173
174 REG_L s0, TASK_TI_USER_SP(tp)
175 csrrc s1, CSR_STATUS, t0
176 save_userssp s2, s1
177 csrr s2, CSR_EPC
178 csrr s3, CSR_TVAL
179 csrr s4, CSR_CAUSE
180 csrr s5, CSR_SCRATCH
181 REG_S s0, PT_SP(sp)
182 REG_S s1, PT_STATUS(sp)
183 REG_S s2, PT_EPC(sp)
184 REG_S s3, PT_BADADDR(sp)
185 REG_S s4, PT_CAUSE(sp)
186 REG_S s5, PT_TP(sp)
187
188 /*
189 * Set the scratch register to 0, so that if a recursive exception
190 * occurs, the exception vector knows it came from the kernel
191 */
192 csrw CSR_SCRATCH, x0
193
194 /* Load the global pointer */
195 load_global_pointer
196
197 /* Load the kernel shadow call stack pointer if coming from userspace */
198 scs_load_current_if_task_changed s5
199
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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