We are seeing following errors on two of our nodes which brings the node to freeze.

Node 1:

May  8 11:19:05 kernel: [89019.043852] Pid: 15145, comm: python Tainted: GB      2.6.32-344-ec2 #46-Ubuntu
May  8 11:19:05 kernel: [89019.043852] Call Trace:
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810b2d90>] bad_page+0xd0/0x130
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810b5964>] free_hot_cold_page+0x2a4/0x300
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810b5a11>] __pagevec_free+0x51/0xb0
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff8101d472>] ? ___pte_free_tlb+0x22/0x90
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810b853c>] release_pages+0x22c/0x280
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810de6e4>] free_pages_and_swap_cache+0xb4/0xe0
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810d40bf>] unmap_region+0x14f/0x170
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810d46c5>] do_munmap+0x295/0x3b0
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff810d4831>] sys_munmap+0x51/0x80
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff81009bb8>] system_call_fastpath+0x16/0x1b
May  8 11:19:05 kernel: [89019.043852]  [<ffffffff81009b50>] ? system_call+0x0/0x52

Node 2:
May  8 07:58:42 kernel: [1986597.770228] CPU 7
May  8 07:58:42 kernel: [1986597.770231] Modules linked in: ipv6
May  8 07:58:42 kernel: [1986597.770237] Pid: 25928, comm: python Not tainted 2.6.32-344-ec2 #46-Ubuntu
May  8 07:58:42 kernel: [1986597.770240] RIP: e030:[<ffffffff810b521f>]  [<ffffffff810b521f>] free_pcppages_bulk+0x17f/0x360
May  8 07:58:42 kernel: [1986597.770251] RSP: e02b:ffff8800bd85fa38  EFLAGS: 00010002
May  8 07:58:42 kernel: [1986597.770254] RAX: dead000000200200 RBX: 0000000000000001 RCX: ffffffff816af2c0
May  8 07:58:42 kernel: [1986597.770257] RDX: ffffffff816af2f0 RSI: 0000000000000030 RDI: ffffffff816b0fc0
May  8 07:58:42 kernel: [1986597.770259] RBP: ffff8800bd85faa8 R08: ffff880006fbe970 R09: 4000000000020068
May  8 07:58:42 kernel: [1986597.770262] R10: 0000000000000000 R11: dead000000200200 R12: ffff880004cff8f0
May  8 07:58:42 kernel: [1986597.770264] R13: ffff880004cff918 R14: ffffffff816aef00 R15: dead000000100100
May  8 07:58:42 kernel: [1986597.770272] FS:  00007f9c5ffef700(0000) GS:ffff880002ccd000(0000) knlGS:0000000000000000
May  8 07:58:42 kernel: [1986597.770275] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
May  8 07:58:42 kernel: [1986597.770278] CR2: 00007f604762b000 CR3: 00000000580b7000 CR4: 0000000000002660
May  8 07:58:42 kernel: [1986597.770281] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May  8 07:58:42 kernel: [1986597.770284] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
May  8 07:58:42 kernel: [1986597.770287] Process python (pid: 25928, threadinfo ffff8800bd85e000, task ffff8800bdbec0c0)
May  8 07:58:42 kernel: [1986597.770291]  ffffffff816b0f40 0000000200000026 ffffffff816af2f0 0000000000000030
May  8 07:58:42 kernel: [1986597.770296] <0> ffffffff816af2f8 00000007ffffffff ffffffff816af2c0 000000010000e033
May  8 07:58:42 kernel: [1986597.770301] <0> 0000000000000246 00000000000003c0 0000000000002600 0000000000000001
May  8 07:58:42 kernel: [1986597.770312]  [<ffffffff810b5929>] free_hot_cold_page+0x269/0x300
May  8 07:58:42 kernel: [1986597.770316]  [<ffffffff810b5a98>] free_hot_page+0x28/0x60
May  8 07:58:42 kernel: [1986597.770319]  [<ffffffff810b8106>] put_page+0x46/0x170
May  8 07:58:42 kernel: [1986597.770325]  [<ffffffff813ff6d4>] skb_release_data+0x74/0xd0
May  8 07:58:42 kernel: [1986597.770328]  [<ffffffff813ff1d9>] __kfree_skb+0x19/0xa0
May  8 07:58:42 kernel: [1986597.770332]  [<ffffffff81446d3d>] tcp_recvmsg+0x72d/0xac0
May  8 07:58:42 kernel: [1986597.770338]  [<ffffffff8100892c>] ? __switch_to+0x2ec/0x780
May  8 07:58:42 kernel: [1986597.770341]  [<ffffffff813fa574>] sock_common_recvmsg+0x34/0x50
May  8 07:58:42 kernel: [1986597.770345]  [<ffffffff813fa169>] sock_aio_read+0x149/0x150
May  8 07:58:42 kernel: [1986597.770349]  [<ffffffff810ee592>] do_sync_read+0xf2/0x130
May  8 07:58:42 kernel: [1986597.770355]  [<ffffffff8105a3f0>] ? autoremove_wake_function+0x0/0x40
May  8 07:58:42 kernel: [1986597.770359]  [<ffffffff814afd03>] ? thread_return+0x4e/0x42b
May  8 07:58:42 kernel: [1986597.770365]  [<ffffffff812dd951>] ? security_file_permission+0x11/0x20
May  8 07:58:42 kernel: [1986597.770368]  [<ffffffff810ef011>] vfs_read+0x181/0x1a0
May  8 07:58:42 kernel: [1986597.770371]  [<ffffffff810ef07c>] sys_read+0x4c/0x80
May  8 07:58:42 kernel: [1986597.770374]  [<ffffffff81009bb8>] system_call_fastpath+0x16/0x1b
May  8 07:58:42 kernel: [1986597.770377]  [<ffffffff81009b50>] ? system_call+0x0/0x52
May  8 07:58:42 kernel: [1986597.770429]  RSP <ffff8800bd85fa38>
May  8 07:58:42 kernel: [1986597.770447] ---[ end trace c65215bb68b9f489 ]---


Are these because of the same bug?