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Linux Kernel Panic at "Code: Bad RIP value." with One-bit Flip in RIP (Doc ID 2407801.1)

Last updated on APRIL 24, 2020

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 6.0 and later
Linux x86-64


Linux server got unplanned reboot several times. From the crash messages :


[ 5486.019099] BUG: unable to handle kernel paging request at ffffffdf816c7621
[ 5486.019769] IP: [<ffffffdf816c7621>] 0xffffffdf816c7621
[ 5486.020436] PGD 1a8d067 PUD 0
[ 5486.021172] Oops: 0010 [#1] SMP

[ 5486.037278] task: ffff880415608e00 ti: ffff880415610000 task.ti: ffff880415610000
[ 5486.039652] RIP: 0010:[<ffffffdf816c7621>] [<ffffffdf816c7621>] 0xffffffdf816c7621
[ 5486.106311] Code: Bad RIP value.
[ 5486.110081] RIP [<ffffffdf816c7621>] 0xffffffdf816c7621
                                                                          ^----------------------    the RIP value is 0xffffffdfxxxxxxx, with one-bit flipped from 0xffffffffxxxxxxx.


 The RIP is NOT a NULL pointer, but an invalid kernel space address like above.


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