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Security Gateway with enabled Anti-Virus blade crashes in rare scenario
Symptoms
  • Security Gateway with enabled Anti-Virus blade crashes in rare scenario.

  • VMcore dump file contains / KDB procedure shows the following stack:

    ... ...
    [...] kiss_htab_delete_all() at ...
    [...] kiss_htab_destroy_ex() at ...
    [...] kiss_global_htab_entry_cleanup() at ...
    [...] kiss_ghtab_destroy_impl() at ...
    [...] av_ldb_tbl_fini() at ...
    [...] rad_kernel_av_cache_dtor() at ...
    [...] rad_kernel_av_service_dtor() at ...
    [...] rad_kernel_services_container_dtor() at ...
    [...] rad_kernel_api_dtor() at ...
    [...] rad_kernel_global_cleanup() at ...
    [...] fwk_atomic_free() at ...
    [...] fwk_atomic_update_commit() at ...
    [...] fwmultik_cmi_loader_update_local_run_phase() at ...
    [...] fwmultik_atomload_run_ex() at ...
    ... ...
    
Cause

Rare race condition while deleting an entry from the kernel table "av_ldb_tbl".


Solution
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