amd64/189741: 9/STABLE panic at em_msix_rx w/ em(4) + PF
John Baldwin
jhb at FreeBSD.org
Thu May 15 11:40:01 UTC 2014
The following reply was made to PR amd64/189741; it has been noted by GNATS.
From: John Baldwin <jhb at FreeBSD.org>
To: Nick Rogers <ncrogers at gmail.com>, freebsd-gnats-submit at FreeBSD.org
Cc: Gleb Smirnoff <glebius at FreeBSD.org>
Subject: Re: amd64/189741: 9/STABLE panic at em_msix_rx w/ em(4) + PF
Date: Thu, 15 May 2014 07:32:53 -0400
On 5/12/14, 7:43 PM, Nick Rogers wrote:
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "amd64-marcel-freebsd"...
>
> Unread portion of the kernel message buffer:
>
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 5; apic id = 05
> fault virtual address = 0x10
> fault code = supervisor read data, page not present
> instruction pointer = 0x20:0xffffffff8033d350
> stack pointer = 0x28:0xffffff83545384b0
> frame pointer = 0x28:0xffffff83545384c0
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 12 (irq262: em2:rx 0)
> trap number = 12
> panic: page fault
> cpuid = 5
> KDB: stack backtrace:
> #0 0xffffffff80956836 at kdb_backtrace+0x66
> #1 0xffffffff8091c40e at panic+0x1ce
> #2 0xffffffff80d31e70 at trap_fatal+0x290
> #3 0xffffffff80d321d1 at trap_pfault+0x211
> #4 0xffffffff80d327d3 at trap+0x363
> #5 0xffffffff80d1b9d3 at calltrap+0x8
> #6 0xffffffff8034872d at pf_test_rule+0x17ed
> #7 0xffffffff8034ba12 at pf_test+0x1032
> #8 0xffffffff8035112b at pf_check_in+0x2b
> #9 0xffffffff809e952e at pfil_run_hooks+0x9e
> #10 0xffffffff80a5286a at ip_input+0x2ea
> #11 0xffffffff809e8858 at netisr_dispatch_src+0x218
> #12 0xffffffff809df93d at ether_demux+0x14d
> #13 0xffffffff809dfc1e at ether_nh_input+0x1fe
> #14 0xffffffff809e8858 at netisr_dispatch_src+0x218
> #15 0xffffffff809df85f at ether_demux+0x6f
> #16 0xffffffff809dfc1e at ether_nh_input+0x1fe
> #17 0xffffffff809e8858 at netisr_dispatch_src+0x218
> Uptime: 17d7h20m59s
> Dumping 2932 out of 12256 MB: (CTRL-C to abort)
> .1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
>
> Reading symbols from /boot/kernel/aio.ko...Reading symbols from
> /boot/kernel/aio.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/aio.ko
> Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from
> /boot/kernel/coretemp.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/coretemp.ko
> Reading symbols from /boot/kernel/cc_htcp.ko...Reading symbols from
> /boot/kernel/cc_htcp.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/cc_htcp.ko
> #0 doadump (textdump=Variable "textdump" is not available.
> ) at pcpu.h:234
> 234 pcpu.h: No such file or directory.
> in pcpu.h
> (kgdb) list *0xffffffff8033d350
> 0xffffffff8033d350 is in pf_addrcpy (/usr/src/sys/contrib/pf/net/pf.c:512).
> 507 pf_addrcpy(struct pf_addr *dst, struct pf_addr *src, sa_family_t af)
> 508 {
> 509 switch (af) {
> 510 #ifdef INET
> 511 case AF_INET:
> 512 dst->addr32[0] = src->addr32[0];
> 513 break;
> 514 #endif /* INET */
> 515 case AF_INET6:
> 516 dst->addr32[0] = src->addr32[0];
> (kgdb) backtrace
> #0 doadump (textdump=Variable "textdump" is not available.
> ) at pcpu.h:234
> #1 0xffffffff8091bee6 in kern_reboot (howto=260) at
> /usr/src/sys/kern/kern_shutdown.c:454
> #2 0xffffffff8091c3e7 in panic (fmt=0x1 <Address 0x1 out of bounds>)
> at /usr/src/sys/kern/kern_shutdown.c:642
> #3 0xffffffff80d31e70 in trap_fatal (frame=0xc, eva=Variable "eva" is
> not available.
> ) at /usr/src/sys/amd64/amd64/trap.c:878
> #4 0xffffffff80d321d1 in trap_pfault (frame=0xffffff8354538400,
> usermode=0) at /usr/src/sys/amd64/amd64/trap.c:794
> #5 0xffffffff80d327d3 in trap (frame=0xffffff8354538400) at
> /usr/src/sys/amd64/amd64/trap.c:456
> #6 0xffffffff80d1b9d3 in calltrap () at
> /usr/src/sys/amd64/amd64/exception.S:232
> #7 0xffffffff8033d350 in pf_addrcpy (dst=0xfffffe010c6416b8,
> src=0x10, af=2 '\002') at /usr/src/sys/contrib/pf/net/pf.c:522
A 'src' pointer of 0x10 here would explain the crash (and is consistent
with the fault address).
> #8 0xffffffff8034872d in pf_test_rule (rm=0xffffff8354538788,
> sm=0xffffff8354538780, direction=1, kif=0xfffffe0007d08100,
> m=0xfffffe0030555d00, off=20, h=0xfffffe0030bad00e,
> pd=0xffffff83545386c0, am=0xffffff8354538790,
> rsm=0xffffff8354538778, ifq=0x0, inp=0x0) at
> /usr/src/sys/contrib/pf/net/pf.c:3900
This is actually in pf_create_state(), and it would seem that 'nk' would
have to be NULL for this to happen. However, 'nsn' would have
to be non-NULL.
I think I see a possible bug that is fixed in 10. Try this:
Index: 9/sys/contrib/pf/net/pf_lb.c
===================================================================
--- 9/sys/contrib/pf/net/pf_lb.c (revision 266119)
+++ 9/sys/contrib/pf/net/pf_lb.c (working copy)
@@ -788,6 +788,7 @@
pool_put(&pf_state_key_pl, *skp);
#endif
*skw = *sks = *nkp = *skp = NULL;
+ *sn = NULL;
return (NULL);
}
}
--
John Baldwin
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