Hi Ingo, kernel test robot noticed the following build warnings: [auto build test WARNING on linux/master] [also build test WARNING on tip/x86/mm linus/master v6.9-rc6 next-20240430] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ingo-Molnar/x86-mm-Remove-broken-vsyscall-emulation-code-from-the-page-fault-code/20240430-135258 base: linux/master patch link: https://lore.kernel.org/r/Zi9Ts1HcqiKzy9GX%40gmail.com patch subject: [PATCH] x86/mm: Remove broken vsyscall emulation code from the page fault code config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20240430/202404302220.EkdfEBSB-lkp@xxxxxxxxx/config) compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240430/202404302220.EkdfEBSB-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202404302220.EkdfEBSB-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): arch/x86/entry/vsyscall/vsyscall_64.c: In function 'emulate_vsyscall': >> arch/x86/entry/vsyscall/vsyscall_64.c:118:29: warning: variable 'tsk' set but not used [-Wunused-but-set-variable] 118 | struct task_struct *tsk; | ^~~ vim +/tsk +118 arch/x86/entry/vsyscall/vsyscall_64.c 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 114 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 115 bool emulate_vsyscall(unsigned long error_code, 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 116 struct pt_regs *regs, unsigned long address) 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 117 { 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 @118 struct task_struct *tsk; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 119 unsigned long caller; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 120 int vsyscall_nr, syscall_nr, tmp; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 121 long ret; fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 122 unsigned long orig_dx; 7460ed2844ffad arch/x86_64/kernel/vsyscall.c John Stultz 2007-02-16 123 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 124 /* Write faults or kernel-privilege faults never get fixed up. */ 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 125 if ((error_code & (X86_PF_WRITE | X86_PF_USER)) != X86_PF_USER) 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 126 return false; 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 127 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 128 if (!(error_code & X86_PF_INSTR)) { 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 129 /* Failed vsyscall read */ 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 130 if (vsyscall_mode == EMULATE) 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 131 return false; 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 132 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 133 /* 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 134 * User code tried and failed to read the vsyscall page. 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 135 */ 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 136 warn_bad_vsyscall(KERN_INFO, regs, "vsyscall read attempt denied -- look up the vsyscall kernel parameter if you need a workaround"); 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 137 return false; 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 138 } 918ce325098a4e arch/x86/entry/vsyscall/vsyscall_64.c Andy Lutomirski 2019-06-26 139 c9712944b2a123 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-07-13 140 /* 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 141 * No point in checking CS -- the only way to get here is a user mode 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 142 * trap to a high address, which means that we're in 64-bit user code. c9712944b2a123 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-07-13 143 */ 7460ed2844ffad arch/x86_64/kernel/vsyscall.c John Stultz 2007-02-16 144 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 145 WARN_ON_ONCE(address != regs->ip); 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 146 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 147 if (vsyscall_mode == NONE) { 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 148 warn_bad_vsyscall(KERN_INFO, regs, 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 149 "vsyscall attempted with vsyscall=none"); 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 150 return false; c9712944b2a123 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-07-13 151 } 7460ed2844ffad arch/x86_64/kernel/vsyscall.c John Stultz 2007-02-16 152 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 153 vsyscall_nr = addr_to_vsyscall_nr(address); c149a665ac488e arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-03 154 c149a665ac488e arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-03 155 trace_emulate_vsyscall(vsyscall_nr); c149a665ac488e arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-03 156 c9712944b2a123 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-07-13 157 if (vsyscall_nr < 0) { c9712944b2a123 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-07-13 158 warn_bad_vsyscall(KERN_WARNING, regs, 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 159 "misaligned vsyscall (exploit attempt or buggy program) -- look up the vsyscall kernel parameter if you need a workaround"); 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 160 goto sigsegv; 7460ed2844ffad arch/x86_64/kernel/vsyscall.c John Stultz 2007-02-16 161 } 7460ed2844ffad arch/x86_64/kernel/vsyscall.c John Stultz 2007-02-16 162 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 163 if (get_user(caller, (unsigned long __user *)regs->sp) != 0) { 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 164 warn_bad_vsyscall(KERN_WARNING, regs, 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 165 "vsyscall with bad stack (exploit attempt?)"); 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 166 goto sigsegv; ^1da177e4c3f41 arch/x86_64/kernel/vsyscall.c Linus Torvalds 2005-04-16 167 } ^1da177e4c3f41 arch/x86_64/kernel/vsyscall.c Linus Torvalds 2005-04-16 168 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 169 tsk = current; 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 170 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 171 /* 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 172 * Check for access_ok violations and find the syscall nr. 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 173 * 46ed99d1b7c929 arch/x86/kernel/vsyscall_64.c Emil Goode 2012-04-01 174 * NULL is a valid user pointer (in the access_ok sense) on 32-bit and 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 175 * 64-bit, so we don't need to special-case it here. For all the 46ed99d1b7c929 arch/x86/kernel/vsyscall_64.c Emil Goode 2012-04-01 176 * vsyscalls, NULL means "don't write anything" not "write it at 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 177 * address 0". 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 178 */ 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 179 switch (vsyscall_nr) { 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 180 case 0: ddccf40fe82b7a arch/x86/entry/vsyscall/vsyscall_64.c Arnd Bergmann 2017-11-23 181 if (!write_ok_or_segv(regs->di, sizeof(struct __kernel_old_timeval)) || 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 182 !write_ok_or_segv(regs->si, sizeof(struct timezone))) { 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 183 ret = -EFAULT; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 184 goto check_fault; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 185 } 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 186 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 187 syscall_nr = __NR_gettimeofday; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 188 break; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 189 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 190 case 1: 21346564ccad17 arch/x86/entry/vsyscall/vsyscall_64.c Arnd Bergmann 2019-11-05 191 if (!write_ok_or_segv(regs->di, sizeof(__kernel_old_time_t))) { 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 192 ret = -EFAULT; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 193 goto check_fault; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 194 } 5651721edec25b arch/x86/kernel/vsyscall_64.c Will Drewry 2012-07-13 195 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 196 syscall_nr = __NR_time; 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 197 break; 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 198 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 199 case 2: 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 200 if (!write_ok_or_segv(regs->di, sizeof(unsigned)) || 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 201 !write_ok_or_segv(regs->si, sizeof(unsigned))) { 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 202 ret = -EFAULT; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 203 goto check_fault; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 204 } 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 205 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 206 syscall_nr = __NR_getcpu; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 207 break; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 208 } 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 209 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 210 /* 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 211 * Handle seccomp. regs->ip must be the original value. 5fb94e9ca333f0 arch/x86/entry/vsyscall/vsyscall_64.c Mauro Carvalho Chehab 2018-05-08 212 * See seccomp_send_sigsys and Documentation/userspace-api/seccomp_filter.rst. 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 213 * 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 214 * We could optimize the seccomp disabled case, but performance 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 215 * here doesn't matter. 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 216 */ 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 217 regs->orig_ax = syscall_nr; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 218 regs->ax = -ENOSYS; fefad9ef58ffc2 arch/x86/entry/vsyscall/vsyscall_64.c Christian Brauner 2019-09-24 219 tmp = secure_computing(); 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 220 if ((!tmp && regs->orig_ax != syscall_nr) || regs->ip != address) { 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 221 warn_bad_vsyscall(KERN_DEBUG, regs, 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 222 "seccomp tried to change syscall nr or ip"); fcb116bc43c8c3 arch/x86/entry/vsyscall/vsyscall_64.c Eric W. Biederman 2021-11-18 223 force_exit_sig(SIGSYS); 695dd0d634df89 arch/x86/entry/vsyscall/vsyscall_64.c Eric W. Biederman 2021-10-20 224 return true; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 225 } 26893107aa717c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2014-11-04 226 regs->orig_ax = -1; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 227 if (tmp) 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 228 goto do_ret; /* skip requested */ 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 229 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 230 /* 198d72414c92c7 arch/x86/entry/vsyscall/vsyscall_64.c Ingo Molnar 2024-04-29 231 * With a real vsyscall, page faults cause SIGSEGV. 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 232 */ 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 233 ret = -EFAULT; 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 234 switch (vsyscall_nr) { 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 235 case 0: fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 236 /* this decodes regs->di and regs->si on its own */ d5a00528b58cdb arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-09 237 ret = __x64_sys_gettimeofday(regs); 5651721edec25b arch/x86/kernel/vsyscall_64.c Will Drewry 2012-07-13 238 break; 5651721edec25b arch/x86/kernel/vsyscall_64.c Will Drewry 2012-07-13 239 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 240 case 1: fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 241 /* this decodes regs->di on its own */ d5a00528b58cdb arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-09 242 ret = __x64_sys_time(regs); 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 243 break; 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 244 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 245 case 2: fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 246 /* while we could clobber regs->dx, we didn't in the past... */ fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 247 orig_dx = regs->dx; fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 248 regs->dx = 0; fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 249 /* this decodes regs->di, regs->si and regs->dx on its own */ d5a00528b58cdb arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-09 250 ret = __x64_sys_getcpu(regs); fa697140f9a201 arch/x86/entry/vsyscall/vsyscall_64.c Dominik Brodowski 2018-04-05 251 regs->dx = orig_dx; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 252 break; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 253 } 8c73626ab28527 arch/x86/kernel/vsyscall_64.c John Stultz 2010-07-13 254 87b526d349b04c arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2012-10-01 255 check_fault: 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 256 if (ret == -EFAULT) { 4fc3490114bb15 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-11-07 257 /* Bad news -- userspace fed a bad pointer to a vsyscall. */ 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 258 warn_bad_vsyscall(KERN_INFO, regs, 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 259 "vsyscall fault (exploit attempt?)"); 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 260 goto sigsegv; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 261 } 8c73626ab28527 arch/x86/kernel/vsyscall_64.c John Stultz 2010-07-13 262 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 263 regs->ax = ret; 8c73626ab28527 arch/x86/kernel/vsyscall_64.c John Stultz 2010-07-13 264 5651721edec25b arch/x86/kernel/vsyscall_64.c Will Drewry 2012-07-13 265 do_ret: 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 266 /* Emulate a ret instruction. */ 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 267 regs->ip = caller; 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 268 regs->sp += 8; 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 269 return true; c08c820508233b arch/x86_64/kernel/vsyscall.c Vojtech Pavlik 2006-09-26 270 5cec93c216db77 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-06-05 271 sigsegv: 3cf5d076fb4d48 arch/x86/entry/vsyscall/vsyscall_64.c Eric W. Biederman 2019-05-23 272 force_sig(SIGSEGV); 3ae36655b97a03 arch/x86/kernel/vsyscall_64.c Andy Lutomirski 2011-08-10 273 return true; ^1da177e4c3f41 arch/x86_64/kernel/vsyscall.c Linus Torvalds 2005-04-16 274 } ^1da177e4c3f41 arch/x86_64/kernel/vsyscall.c Linus Torvalds 2005-04-16 275 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
