tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 01af33cc9894b4489fb68fa35c40e9fe85df63dc commit: 0c30c4cd953025979b7689e49844837f762303ec [1589/1892] mm/maps: read proc/pid/maps under RCU config: x86_64-randconfig-121-20240125 (https://download.01.org/0day-ci/archive/20240125/202401251829.0m6Eo4LI-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240125/202401251829.0m6Eo4LI-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/202401251829.0m6Eo4LI-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> fs/proc/task_mmu.c:143:45: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct file [noderef] __rcu **f @@ got struct file ** @@ fs/proc/task_mmu.c:143:45: sparse: expected struct file [noderef] __rcu **f fs/proc/task_mmu.c:143:45: sparse: got struct file ** fs/proc/task_mmu.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...): include/linux/rcupdate.h:781:9: sparse: sparse: context imbalance in 'get_vma_snapshot' - unexpected unlock fs/proc/task_mmu.c:264:22: sparse: sparse: context imbalance in 'm_start' - different lock contexts for basic block include/linux/rcupdate.h:781:9: sparse: sparse: context imbalance in 'm_stop' - unexpected unlock include/linux/rcupdate.h:781:9: sparse: sparse: context imbalance in 'smaps_pte_range' - unexpected unlock include/linux/rcupdate.h:781:9: sparse: sparse: context imbalance in 'clear_refs_pte_range' - unexpected unlock include/linux/rcupdate.h:781:9: sparse: sparse: context imbalance in 'pagemap_pmd_range' - unexpected unlock include/linux/rcupdate.h:781:9: sparse: sparse: context imbalance in 'pagemap_scan_pmd_entry' - unexpected unlock fs/proc/task_mmu.c: note: in included file (through arch/x86/include/asm/uaccess.h, include/linux/uaccess.h, include/linux/sched/task.h, ...): arch/x86/include/asm/uaccess_64.h:88:24: sparse: sparse: cast removes address space '__user' of expression arch/x86/include/asm/uaccess_64.h:88:24: sparse: sparse: cast removes address space '__user' of expression vim +143 fs/proc/task_mmu.c 132 133 /* 134 * Take VMA snapshot and pin vm_file and anon_name as they are used by 135 * show_map_vma. 136 */ 137 static int get_vma_snapshot(struct proc_maps_private *priv, struct vm_area_struct *vma) 138 { 139 struct vm_area_struct *copy = &priv->vma_copy; 140 int ret = -EAGAIN; 141 142 memcpy(copy, vma, sizeof(*vma)); > 143 if (copy->vm_file && !get_file_rcu(©->vm_file)) 144 goto out; 145 146 if (!anon_vma_name_get_if_valid(copy)) 147 goto put_file; 148 149 if (priv->mm_wr_seq == mmap_write_seq_read(priv->mm)) 150 return 0; 151 152 /* Address space got modified, vma might be stale. Wait and retry. */ 153 rcu_read_unlock(); 154 ret = mmap_read_lock_killable(priv->mm); 155 mmap_write_seq_record(priv->mm, &priv->mm_wr_seq); 156 mmap_read_unlock(priv->mm); 157 rcu_read_lock(); 158 159 if (!ret) 160 ret = -EAGAIN; /* no other errors, ok to retry */ 161 162 anon_vma_name_put_if_valid(copy); 163 put_file: 164 if (copy->vm_file) 165 fput(copy->vm_file); 166 out: 167 return ret; 168 } 169 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
