On Mon, 26 Sep 2011, Asias He wrote:
$ ./kvm run -n mode=tap [ 1.490781] registered taskstats version 1 [ 1.492781] BUG: unable to handle kernel NULL pointer dereference at 0000001c [ 1.493781] IP: [<c14f3236>] virtnet_poll+0x16e/0x408 [ 1.493781] *pde = 00000000 [ 1.493781] Oops: 0000 [#1] PREEMPT SMP [ 1.493781] Modules linked in: [ 1.493781] [ 1.493781] Pid: 1, comm: swapper Tainted: G W 3.1.0-rc3+ #77 [ 1.493781] EIP: 0060:[<c14f3236>] EFLAGS: 00010286 CPU: 1 [ 1.493781] EIP is at virtnet_poll+0x16e/0x408 [ 1.493781] EAX: 00001000 EBX: db4bb0c0 ECX: db7cd778 EDX: 00001000 [ 1.493781] ESI: 00000000 EDI: db7cd6c0 EBP: db487fa8 ESP: db487f64 [ 1.493781] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 1.493781] Process swapper (pid: 1, ti=db486000 task=db450000 task.ti=db458000) [ 1.493781] Stack: [ 1.493781] db487f98 19dfb000 db5e1400 00000080 c1b0df60 db6ff000 00000000 00000010 [ 1.493781] 00000080 dbcebfe0 db5e1414 db5e1000 ffffffff fffec005 db5e1414 db906dc0 [ 1.493781] c1a39a0c db487fd4 c15e4869 fffb71f7 db906dc8 00000080 0000012c 00000000 [ 1.493781] Call Trace: [ 1.493781] [<c15e4869>] net_rx_action+0x8e/0x177 [ 1.493781] [<c1066128>] __do_softirq+0xa7/0x158 [ 1.493781] [<c1066081>] ? __tasklet_hi_schedule_first+0x2b/0x2b [ 1.493781] <IRQ> [ 1.493781] [<c1065e82>] ? _local_bh_enable_ip.isra.9+0x65/0x86 [ 1.493781] [<c1065eab>] ? local_bh_enable_ip+0x8/0xa [ 1.493781] [<c16a7a78>] ? _raw_spin_unlock_bh+0x18/0x1a [ 1.493781] [<c15e59c5>] ? dev_set_rx_mode+0x22/0x26 [ 1.493781] [<c15e5a5f>] ? __dev_open+0x96/0xa6 [ 1.493781] [<c15e5c23>] ? __dev_change_flags+0x97/0x10e [ 1.493781] [<c15e5cfe>] ? dev_change_flags+0x13/0x3f [ 1.493781] [<c1acfe6f>] ? ip_auto_config+0x160/0xcf8 [ 1.493781] [<c1393c86>] ? extract_entropy+0x45/0x71 [ 1.493781] [<c1059e35>] ? get_parent_ip+0xb/0x31 [ 1.493781] [<c16aa6b7>] ? sub_preempt_count+0x7c/0x89 [ 1.493781] [<c16a7d24>] ? _raw_spin_unlock+0x1c/0x27 [ 1.493781] [<c1629173>] ? tcp_set_default_congestion_control+0x8c/0x95 [ 1.493781] [<c1001159>] ? do_one_initcall+0x71/0x114 [ 1.493781] [<c1acfd0f>] ? root_nfs_parse_addr+0x91/0x91 [ 1.493781] [<c1a9c7ab>] ? kernel_init+0xab/0x11d [ 1.493781] [<c1a9c700>] ? start_kernel+0x301/0x301 [ 1.493781] [<c16acfb6>] ? kernel_thread_helper+0x6/0xd [ 1.493781] Code: 89 d8 e8 23 94 0e 00 8b 4d dc 89 c7 f3 a4 8b 55 dc 8b 4d d8 29 55 f0 8b 75 e0 01 d1 eb 13 8d 45 f0 89 f2 50 89 d8 e8 ae f2 ff ff <8b> 76 1c 31 c9 58 83 7d f0 00 75 e7 85 f6 89 75 e0 0f 84 6e 02 [ 1.493781] EIP: [<c14f3236>] virtnet_poll+0x16e/0x408 SS:ESP 0068:db487f64 [ 1.493781] CR2: 000000000000001c [ 1.549772] ---[ end trace 4eaa2a86a8e2da27 ]--- [ 1.550772] Kernel panic - not syncing: Fatal exception in interrupt [ 1.551772] Pid: 1, comm: swapper Tainted: G D W 3.1.0-rc3+ #77 [ 1.553771] Call Trace: [ 1.553771] [<c169ca33>] panic+0x58/0x156 [ 1.554771] [<c16a921a>] oops_end+0x8c/0x9b [ 1.555771] [<c169c4e7>] no_context+0x116/0x120 [ 1.555771] [<c169c5e1>] __bad_area_nosemaphore+0xf0/0xf8 [ 1.557771] [<c169c5f6>] bad_area_nosemaphore+0xd/0x10 [ 1.558771] [<c16aa4b5>] do_page_fault+0x174/0x2fa [ 1.559770] [<c107bad0>] ? sched_clock_local+0x10/0x14b [ 1.560770] [<c15db33f>] ? __netdev_alloc_skb+0x17/0x34 [ 1.561770] [<c10e9b84>] ? __kmalloc_track_caller+0xb7/0xc7 [ 1.563770] [<c15db33f>] ? __netdev_alloc_skb+0x17/0x34 [ 1.564770] [<c16aa341>] ? spurious_fault+0xa8/0xa8 [ 1.565770] [<c16a89d6>] error_code+0x5a/0x60 [ 1.566769] [<c16aa341>] ? spurious_fault+0xa8/0xa8 [ 1.567769] [<c14f3236>] ? virtnet_poll+0x16e/0x408 [ 1.567769] [<c15e4869>] net_rx_action+0x8e/0x177 [ 1.568769] [<c1066128>] __do_softirq+0xa7/0x158 [ 1.569769] [<c1066081>] ? __tasklet_hi_schedule_first+0x2b/0x2b [ 1.569769] <IRQ> [<c1065e82>] ? _local_bh_enable_ip.isra.9+0x65/0x86 [ 1.570769] [<c1065eab>] ? local_bh_enable_ip+0x8/0xa [ 1.571769] [<c16a7a78>] ? _raw_spin_unlock_bh+0x18/0x1a [ 1.571769] [<c15e59c5>] ? dev_set_rx_mode+0x22/0x26 [ 1.572768] [<c15e5a5f>] ? __dev_open+0x96/0xa6 [ 1.573768] [<c15e5c23>] ? __dev_change_flags+0x97/0x10e [ 1.573768] [<c15e5cfe>] ? dev_change_flags+0x13/0x3f [ 1.574768] [<c1acfe6f>] ? ip_auto_config+0x160/0xcf8 [ 1.574768] [<c1393c86>] ? extract_entropy+0x45/0x71 [ 1.575768] [<c1059e35>] ? get_parent_ip+0xb/0x31 [ 1.576768] [<c16aa6b7>] ? sub_preempt_count+0x7c/0x89 [ 1.576768] [<c16a7d24>] ? _raw_spin_unlock+0x1c/0x27 [ 1.577768] [<c1629173>] ? tcp_set_default_congestion_control+0x8c/0x95 [ 1.578768] [<c1001159>] ? do_one_initcall+0x71/0x114 [ 1.578768] [<c1acfd0f>] ? root_nfs_parse_addr+0x91/0x91 [ 1.579767] [<c1a9c7ab>] ? kernel_init+0xab/0x11d [ 1.580767] [<c1a9c700>] ? start_kernel+0x301/0x301 [ 1.581767] [<c16acfb6>] ? kernel_thread_helper+0x6/0xd [ 1.582767] Rebooting in 1 seconds.. # KVM session ended normally.
This needs fixing before I can apply the patch, right? -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
