Oracle Linux: Kernel Panic on "iscsit_map_iovec"
(Doc ID 2674957.1)
Last updated on JUNE 24, 2020
Applies to:
Linux OS - Version Oracle Linux 7.6 and laterLinux x86-64
Symptoms
An unexpected OS reboot occurred suddenly. According to the below back trace for vmcore, the kernel panic occurred on iscsit_map_iovec.
crash> bt PID: 290667 TASK: ffff885e86a58000 CPU: 10 COMMAND: "iscsi_ttx" #0 [ffff882b27ff7950] machine_kexec at ffffffff8106299b #1 [ffff882b27ff79c0] crash_kexec at ffffffff8111bff2 #2 [ffff882b27ff7a90] oops_end at ffffffff8101b938 #3 [ffff882b27ff7ac0] no_context at ffffffff81745a9c #4 [ffff882b27ff7b20] __bad_area_nosemaphore at ffffffff81745b84 #5 [ffff882b27ff7b70] bad_area_nosemaphore at ffffffff81745cf0 #6 [ffff882b27ff7b80] __do_page_fault at ffffffff810713a6 #7 [ffff882b27ff7bf0] do_page_fault at ffffffff810717b0 #8 [ffff882b27ff7c30] page_fault at ffffffff81759def [exception RIP: iscsit_map_iovec+99] RIP: ffffffffa063f523 RSP: ffff882b27ff7ce0 RFLAGS: 00010246 RAX: ffff882b165a8140 RBX: ffff882b165a8140 RCX: 0000000000001000 RDX: 0000000000000000 RSI: ffff88298995bf10 RDI: ffff882b165a8140 RBP: ffff882b27ff7d30 R8: 0000000000000000 R9: 0000000000000000 R10: 0000000000040000 R11: ffffea00abc23780 R12: 0000000000000000 R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #9 [ffff882b27ff7d38] iscsit_response_queue at ffffffffa0644d2f [iscsi_target_mod] #10 [ffff882b27ff7e40] iscsi_target_tx_thread at ffffffffa06423cf [iscsi_target_mod] #11 [ffff882b27ff7ec0] kthread at ffffffff810ac4aa #12 [ffff882b27ff7f50] ret_from_fork at ffffffff81754ae7
Cause
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Cause |
Solution |
References |