RHEL7: memory leak in smb2_query_symlink

Solution Verified - Updated -

Issue

  • Huge slab (kmalloc-512) memory consumption is in observation.
  LowMem/Slab/PageTables/Shmem:
    209.23 GiB (83%) of total ram used for Slab
    0.8 GiB (0%) of total ram used for PageTables
    3.73 GiB (1%) of total ram used for Shmem

kmalloc-1024 = 23296 K
proc_inode_cache = 23520 K
task_struct = 24544 K
ext4_inode_cache = 40864 K
vm_area_struct = 64312 K
buffer_head = 93880 K
kmalloc-256 = 359768 K
kmalloc-192 = 401832 K
radix_tree_node = 2725536 K
kmalloc-512 = 215618800 K

Environment

  • Red Hat Enterprise Linux 7
  • cifs

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