Kernel BUG: NULL pointer dereference , reference to sys_recvmsg

Greetings, The next report is a Kernel NULL pointer dereference in tcp/ip (IPv4). I see that message all time in syslog.conf and console. Kernel compiled with gcc 4.1.1-> (Debian 4.1.1-21) Kernel Version: 2.6.21.1 (official source code) Processor: 2 x Xeon 2.8 Ram: 1G Swap: 1G Raid: Using

kernel BUG at mm/rmap.c:596!

Hi, My servers are running 2.6.21 (oficial source code) since today and i can see an error in syslog : May 2 16:41:27 zz11 kernel: kernel BUG at mm/rmap.c:596! May 2 16:41:27 zz11 kernel: invalid opcode: [#1] May 2 16:41:27 zz11 kernel: SMP May 2 16:41:27 zz11 kernel: Modules linked