lug-bg: atraktiwen kernel(2.4.14) crash
- Subject: lug-bg: atraktiwen kernel(2.4.14) crash
- From: ndelev@xxxxxxxxx (Niki Delev)
- Date: Wed, 7 Nov 2001 13:07:19 -0800 (PST)
Nov 7 20:42:50 saphead pppd[7114]: sent [LCP EchoRep
id=0xad magic=0x4f4e4283 00 2d 0f 01]
Nov 7 20:43:00 saphead pppd[7114]: rcvd [LCP EchoReq
id=0xae magic=0x354e6478 00 2d 0f 01]
Nov 7 20:43:00 saphead pppd[7114]: sent [LCP EchoRep
id=0xae magic=0x4f4e4283 00 2d 0f 01]
Nov 7 20:43:09 saphead kernel: IN=ppp0 OUT= MAC=
SRC=srcip DST=myip LEN=40 TOS=0x00 PREC=0x00 TTL=124
ID=49482 PROTO=TCP SPT=6635 DPT=6635 WINDOW=48303
RES=0x00 SYN URGP=0
Nov 7 20:43:10 saphead pppd[7114]: rcvd [LCP EchoReq
id=0xaf magic=0x354e6478 00 2d 0f 01]
Nov 7 20:43:10 saphead pppd[7114]: sent [LCP EchoRep
id=0xaf magic=0x4f4e4283 00 2d 0f 01]
Nov 7 20:43:18 saphead kernel: kernel BUG at
page_alloc.c:76!
Nov 7 20:43:18 saphead kernel: invalid operand: 0000
Nov 7 20:43:18 saphead kernel: CPU: 0
Nov 7 20:43:18 saphead kernel: EIP:
0010:[<c0137c94>] Tainted: P
Nov 7 20:43:18 saphead kernel: EFLAGS: 00010286
Nov 7 20:43:18 saphead kernel: eax: 0000001f ebx:
c125a6cc ecx: c039ca04 edx: 00008134
Nov 7 20:43:18 saphead kernel: esi: c125a6cc edi:
00000000 ebp: 00000018 esp: cbfe9f20
Nov 7 20:43:18 saphead kernel: ds: 0018 es: 0018
ss: 0018
Nov 7 20:43:18 saphead kernel: Process kswapd (pid:
5, stackpage=cbfe9000)
Nov 7 20:43:18 saphead kernel: Stack: c0326ed3
0000004c c125a6cc c125a6cc 00000000 00000018 c014307a
c125a6cc
Nov 7 20:43:18 saphead kernel: 000001d0
c0136794 c125a6cc c013875c c125a6e8 c0137227 00000020
000001d0
Nov 7 20:43:18 saphead kernel: 00000020
00000006 00000100 00000e86 000001d0 c039de6c c0137762
00000006
Nov 7 20:43:18 saphead kernel: Call Trace:
[<c014307a>] [<c0136794>] [<c013875c>] [<c0137227>]
[<c0137762>]
Nov 7 20:43:18 saphead kernel: [<c01377ad>]
[<c0137843>] [<c013789e>] [<c01379ad>] [<c01056e4>]
Nov 7 20:43:18 saphead kernel:
Nov 7 20:43:18 saphead kernel: Code: 0f 0b 83 c4 08
8d b4 26 00 00 00 00 89 d8 2b 05 ec e9 42 c0
Nov 7 20:43:21 saphead pppd[7114]: rcvd [LCP EchoReq
id=0xb0 magic=0x354e6478 00 2d 0f 01]
Nov 7 20:43:21 saphead pppd[7114]: sent [LCP EchoRep
id=0xb0 magic=0x4f4e4283 00 2d 0f 01]
Nov 7 20:43:31 saphead pppd[7114]: rcvd [LCP EchoReq
id=0xb1 magic=0x354e6478 00 2d 0f 01]
Linux saphead 2.4.14 #1 SMP á· ?ÍÅ 6 12:01:01 EET 2001
i686 unknown
razbira se systemata stana neizpolzwaema
...
tyi, chudq se dali li packeta poluchen 9 sekundi
predi zabiwa ne e winowen za sluchiloto se..
netfilter/iptables 1.2.4, stateful prawila.
packeta e bil dropnat. kakto qsno se wijda
kswapd e uchastwal w zabiwa. obyrnete wnimanie
na SPT i DPT.
iz /usr/src/linux/mm/page_alloc.c:
...
if (page->mapping)
BUG();
...
iz /usr/include/asm/page.h:
...
#ifdef CONFIG_DEBUG_BUGVERBOSE
extern void do_BUG(const char *file, int line);
#define BUG() do {
\
do_BUG(__FILE__, __LINE__);
\
__asm__ __volatile__("ud2");
\
} while (0)
#else
#define BUG() __asm__ __volatile__(".byte 0x0f,0x0b")
#endif
#define PAGE_BUG(page) do { \
BUG(); \
} while (0)
...
izliza che ako opredelen packet sadyrja
posledowatelnostta 0x0f,0x0b sistemata shte zabie? ;)
obqsnenie? mersi.
- ND
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