Panic in resched_task at boot or module load/unload

Solution Verified - Updated -

Issue

  • A crash occurs, at boot time or during module load or unload, with this backtrace:

~~~
`BUG: unable to handle kernel NULL pointer dereference at 0000000000000008

IP: [] resched_task+0x17/0x88
PGD 0
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/system/cpu/cpu15/cache/index2/shared_cpu_map
CPU 12
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat bridge stp llc nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc autofs4 ipv6 cpufreq_ondemand acpi_cpufreq freq_table vfat fat dm_mirror dm_region_hash dm_log dm_multipath dm_mod kvm_intel kvm uinput lpfc scsi_transport_fc usb_storage i2c_i801 scsi_tgt e1000e i2c_core igb iTCO_wdt iTCO_vendor_support dca shpchp mptsas mptscsih mptbase scsi_transport_sas [last unloaded: pciehp]
Pid: 2713, comm: bash Not tainted 2.6.31-27.el6.2.x86_64 #1 SIRIUS
RIP: 0010:[]  [] resched_task+0x17/0x88
RSP: 0018:ffff880043c77db8  EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8800445c6a00 RCX: ffff88046148ddb8
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000000
RBP: ffff880043c77dc8 R08: ffff88046148e7e8 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000046
R13: 00000000001d6a00 R14: 0000000000000010 R15: ffff880043c82310
FS:  0000000000000000(0000) GS:ffff880043c74000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 000000044f9ea000 CR4: 00000000000026e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process bash (pid: 2713, threadinfo ffff88044f912000, task ffff88046148dd80)
Stack:
ffff880043e4aa00 000000005cbe9f90 ffff880043c77e08 ffffffff81052cfa
<0> ffff880043c77e08 000000005cbe9f90 ffff880043e4aa00 000000000000000c
<0> ffff88046148dd80 ffffffff8108ce69 ffff880043c77e48 ffffffff8105b103
Call Trace:

[] resched_cpu+0x95/0xc1
[] ? tick_sched_timer+0x0/0xc4
[] scheduler_tick+0x190/0x24a
[] update_process_times+0x61/0x88
[] tick_sched_timer+0x84/0xc4
[] __run_hrtimer+0x98/0xe4
[] ? hrtimer_interrupt+0xbb/0x17e
[] hrtimer_interrupt+0x100/0x17e
[] ? remove_vma+0x90/0xaf
[] smp_apic_timer_interrupt+0x8f/0xba
[] apic_timer_interrupt+0x13/0x20

[] ? kmem_cache_free+0xdf/0x135
[] ? remove_vma+0x90/0xaf
[] ? exit_mmap+0xda/0x110
[] ? mmput+0x66/0xd8
[] ? flush_old_exec+0x41e/0x754
[] ? load_elf_binary+0x31b/0x1657
[] ? native_sched_clock+0x2d/0x62
[] ? lock_release_holdtime+0x3f/0x146
[] ? search_binary_handler+0x100/0x2da
[] ? load_elf_binary+0x0/0x1657
[] ? do_execve+0x1d6/0x2eb
[] ? sys_execve+0x4d/0x78
[] ? stub_execve+0x6a/0xc0
Code: 00 00 74 05 e8 b8 5c 01 00 48 83 c4 28 5b 41 5c 41 5d c9 c3 55 48 89 e5 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 45 f8 31 c0 <48> 8b 57 08 48 c7 c0 00 6a 1d 00 8b 4a 18 48 03 04 cd 50 a4 8b
RIP  [] resched_task+0x17/0x88
RSP
CR2: 0000000000000008

Environment

  • Red Hat Enterprise Linux 6.0 beta

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