BCC: l...@intel.com CC: kbuild-...@lists.01.org CC: linux-ker...@vger.kernel.org TO: Xianting Tian <xianting.t...@linux.alibaba.com> CC: Palmer Dabbelt <pal...@rivosinc.com> CC: Guo Ren <guo...@kernel.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f41445645ab5d172e6090d00c332c335d8dba337 commit: 3f1901110a89b0e2e13adb2ac8d1a7102879ea98 RISC-V: Add fast call path of crash_kexec() date: 3 weeks ago :::::: branch date: 3 hours ago :::::: commit date: 3 weeks ago config: riscv-randconfig-m031-20220810 (https://download.01.org/0day-ci/archive/20220811/202208110538.ualoqmbs-...@intel.com/config) compiler: riscv64-linux-gcc (GCC) 12.1.0 If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <l...@intel.com> Reported-by: Dan Carpenter <dan.carpen...@oracle.com> smatch warnings: arch/riscv/kernel/traps.c:48 die() warn: variable dereferenced before check 'regs' (see line 46) vim +/regs +48 arch/riscv/kernel/traps.c 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 30 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 31 void die(struct pt_regs *regs, const char *str) 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 32 { 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 33 static int die_counter; 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 34 int ret; 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 35 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 36 oops_enter(); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 37 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 38 spin_lock_irq(&die_lock); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 39 console_verbose(); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 40 bust_spinlocks(1); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 41 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 42 pr_emerg("%s [#%d]\n", str, ++die_counter); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 43 print_modules(); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 44 show_regs(regs); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 45 a4c3733d32a72f Christoph Hellwig 2019-10-28 @46 ret = notify_die(DIE_OOPS, str, regs, 0, regs->cause, SIGSEGV); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 47 3f1901110a89b0 Xianting Tian 2022-06-06 @48 if (regs && kexec_should_crash(current)) 3f1901110a89b0 Xianting Tian 2022-06-06 49 crash_kexec(regs); 3f1901110a89b0 Xianting Tian 2022-06-06 50 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 51 bust_spinlocks(0); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 52 add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 53 spin_unlock_irq(&die_lock); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 54 oops_exit(); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 55 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 56 if (in_interrupt()) 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 57 panic("Fatal exception in interrupt"); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 58 if (panic_on_oops) 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 59 panic("Fatal exception"); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 60 if (ret != NOTIFY_STOP) 0e25498f8cd43c Eric W. Biederman 2021-06-28 61 make_task_dead(SIGSEGV); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 62 } 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 63 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- kbuild@lists.01.org To unsubscribe send an email to kbuild-le...@lists.01.org
