Server panic rebooted due to third party Imperva kernel module "krg_629288_imRH7_K1S_smp64"

Solution Verified - Updated -


  • Server panic rebooted with exception RIP: strstr+33 because of third-party kernel module krg_629288_imRH7_K1S_smp64.
  • Call traces look similar to those below.
crash> bt
PID: 67753    TASK: ffff9a4abdaa4200  CPU: 59   COMMAND: "oracle_67753_do"
 #0 [ffff9aa2c943f3f0] machine_kexec at ffffffffa96663d4
 #1 [ffff9aa2c943f450] __crash_kexec at ffffffffa9722ae2
 #2 [ffff9aa2c943f520] crash_kexec at ffffffffa9722bd0
 #3 [ffff9aa2c943f538] oops_end at ffffffffa9d91798
 #4 [ffff9aa2c943f560] no_context at ffffffffa9675d14
 #5 [ffff9aa2c943f5b0] __bad_area_nosemaphore at ffffffffa9675fe2
 #6 [ffff9aa2c943f600] bad_area_nosemaphore at ffffffffa9676104
 #7 [ffff9aa2c943f610] __do_page_fault at ffffffffa9d94750
 #8 [ffff9aa2c943f680] do_page_fault at ffffffffa9d94975
 #9 [ffff9aa2c943f6b0] page_fault at ffffffffa9d90778
    [exception RIP: strstr+33]
    RIP: ffffffffa9990c41  RSP: ffff9aa2c943f768  RFLAGS: 00010216
    RAX: 0000000000000000  RBX: ffff9aa2c943f84c  RCX: 0000000000000000
    RDX: 0000000000000005  RSI: ffffffffc171e69e  RDI: 0000000000000000
    RBP: ffff9aa2c943f768   R8: 0000000000000000   R9: 00000000000108a9
    R10: 0000000000000000  R11: ffffffffc17957d8  R12: ffff9c3542665ca0
    R13: 0000000000000000  R14: 00000000000108a9  R15: ffff9c3542665c38
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#10 [ffff9aa2c943f770] oracle_aso_tools_is_oracle_dispatcher at ffffffffc1680275 [krg_629288_imRH7_K1S_smp64]
#11 [ffff9aa2c943f7f0] _classify_process_monitored_from_us at ffffffffc167e24f [krg_629288_imRH7_K1S_smp64]
#12 [ffff9aa2c943f838] oracle_connect_flow_check_if_encrypted at ffffffffc167f3ce [krg_629288_imRH7_K1S_smp64]
#13 [ffff9aa2c943f880] _create_message at ffffffffc1679c03 [krg_629288_imRH7_K1S_smp64]
#14 [ffff9aa2c943f990] krapi_messages_send_rw_message at ffffffffc167b4e6 [krg_629288_imRH7_K1S_smp64]
#15 [ffff9aa2c943f9f8] krapi_post_read_sync at ffffffffc167593d [krg_629288_imRH7_K1S_smp64]
#16 [ffff9aa2c943fbd0] krapi_post_read at ffffffffc1677887 [krg_629288_imRH7_K1S_smp64]
#17 [ffff9aa2c943fc48] _generic_fd_read_postcode at ffffffffc15f3e02 [krg_629288_imRH7_K1S_smp64]
#18 [ffff9aa2c943fcc8] syscall_wrappers_generic_flow_with_param at ffffffffc1605a50 [krg_629288_imRH7_K1S_smp64]
#19 [ffff9aa2c943fd78] syscall_wrappers_generic_read.constprop.60 at ffffffffc160618d [krg_629288_imRH7_K1S_smp64]
#20 [ffff9aa2c943feb8] SYS_read_common_wrap at ffffffffc1606fa7 [krg_629288_imRH7_K1S_smp64]
#21 [ffff9aa2c943ff40] SYS_read_wrap64 at ffffffffc160704e [krg_629288_imRH7_K1S_smp64]
#22 [ffff9aa2c943ff50] system_call_fastpath at ffffffffa9d99f92
    RIP: 00007ffff40ea740  RSP: 00007ffffffeede0  RFLAGS: 00010202
    RAX: 0000000000000000  RBX: 0000000000002010  RCX: 00007ffff2e955b8
    RDX: 0000000000002010  RSI: 00007ffff2e62ca6  RDI: 000000000000001c
    RBP: 00007ffffffed6d0   R8: 0000000000000000   R9: 000000000000001c
    R10: 0000000000000000  R11: 0000000000000246  R12: 000000000000001c
    R13: 00007ffff2e62ca6  R14: 00007ffff2e64da0  R15: 00007ffff2e61c98
    ORIG_RAX: 0000000000000000  CS: 0033  SS: 002b


  • Red Hat Enterprise Linux 7.9
  • Third-party kernel module [krg_629288_imRH7_K1S_smp64]

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