Created attachment 260345 [details]
oops

Hi!

1) Got the following kernel panic:

invalid opcode: 0000 [#1] SMP
CPU: 0 PID: 1449 Comm: openvpn Not tainted 4.8.13-1.el6.elrepo.x86_64 #1
----cut----
Call Trace:
<IRQ>
[<ffffffff810be15e>] ? enqueue_entity+0x45e/0x6f0
[<ffffffffa0104f25>] ? aesni_gcm_enc_avx+0x95/0xd0 [aesni_intel]
[<ffffffffa0105417>] helper_rfc4106_encrypt+0x167/0x2f0 [aesni_intel]
[<ffffffffa0104bfb>] rfc4106_encrypt+0x5b/0x90 [aesni_intel]
----cut----
(See full dump in attachment!)


2) `modinfo aesni_intel` says:

filename:
/lib/modules/4.8.13-1.el6.elrepo.x86_64/kernel/arch/x86/crypto/aesni-intel.ko
alias:          crypto-aes
alias:          aes
license:        GPL
description:    Rijndael (AES) Cipher Algorithm, Intel AES-NI
instructions optimized
alias:          crypto-fpu
alias:          fpu
srcversion:     E063372EF971D4EA858A602
alias:          cpu:type:x86,ven*fam*mod*:feature:*0099*
depends:        glue_helper,aes-x86_64,lrw,cryptd,ablk_helper
intree:         Y
vermagic:       4.8.13-1.el6.elrepo.x86_64 SMP mod_unload modversions


3) `cat /proc/cpuinfo` says it does have AES-NI:

model name      : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz
flags           : fpu de tsc msr pae cx8 apic sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 popcnt tsc_deadline_timer aes avx hypervisor lahf_lm


4) Have tested with `openssl speed -elapsed -evp aes-256-gcm`

Results: AES-NI works fine when doing manual tests, could not trigger this bug intentionally.


5) A full dump of three oops occasions can be found in attachment. Dumps were received using netconsole.