kern/164400: [ipsec] immediate crash after the start of ipsec processing

[Eugene M. Zheganin]

The following reply was made to PR kern/164400; it has been noted by GNATS.

From: "Eugene M. Zheganin" <emz at norma.perm.ru>
To: bug-followup at FreeBSD.org, eugene at zhegan.in
Cc:  
Subject: Re: kern/164400: [ipsec] immediate crash after the start of ipsec
 processing
Date: Wed, 29 Feb 2012 14:03:55 +0600

 This is reproduceable on smaller amount of configs.
 Right now I've built a test installation of nanobsd 9.0, which is also 
 crashing under the same conditions.
 
 For example:
 
 Fatal trap 12: page fault while in kernel mode
 fault virtual address   = 0x60
 fault code              = supervisor read, page not present
 instruction pointer     = 0x20:0xc0980d89
 stack pointer           = 0x28:0xccf245cc
 frame pointer           = 0x28:0xccf245f4
 code segment            = base 0x0, limit 0xfffff, type 0x1b
                          = DPL 0, pres 1, def32 1, gran 1
 processor eflags        = interrupt enabled, resume, IOPL = 0
 current process         = 2099 (ping)
 trap number             = 12
 panic: page fault
 KDB: stack backtrace:
 #0 0xc07d35f8 at kdb_backtrace+0x48
 #1 0xc07a3163 at panic+0xf3
 #2 0xc0a8a492 at trap_fatal+0x232
 #3 0xc0a8a77b at trap_pfault+0x1ab
 #4 0xc0a8b477 at trap+0x367
 #5 0xc0a766cc at calltrap+0x6
 #6 0xc098fe0f at esp_output_cb+0x19f
 #7 0xc099f6f7 at crypto_done+0xf7
 #8 0xc09a1c33 at swcr_process+0x83
 #9 0xc09a06d7 at crypto_invoke+0x67
 #10 0xc09a1548 at crypto_dispatch+0xe8
 #11 0xc0990457 at esp_output+0x577
 #12 0xc09810be at ipsec4_process_packet+0x1ee
 #13 0xc08c3e03 at ip_ipsec_output+0x153
 #14 0xc08c6406 at ip_output+0x426
 #15 0xc2671259 at gre_output+0x469
 #16 0xc08c6b87 at ip_output+0xba7
 #17 0xc08c73dc at rip_output+0x24c
 Uptime: 1m45s
 Automatic reboot in 15 seconds - press a key on the console to abort
 
 I can say also that 'current process' is simply a process that sends the 
 packet which crashes the system. The crash occurs on some of the first 
 packets immidialety after establishing SA.