[Qemu-devel] [3.7.0] Crash when killing qemu on e500mc

[Ben Collins]

I'm mainly posting this as a reminder that I need to investigate it and to get 
any ideas on where the NULL is coming from.

[573785.701594] Unable to handle kernel paging request for data at address 
0x00000000
[573785.709182] Faulting instruction address: 0xc016e864
[573785.714232] Oops: Kernel access of bad area, sig: 11 [#1]
[573785.719705] SMP NR_CPUS=8 P4080 DS
[573785.723185] Modules linked in: isofs ufs qnx4 hfsplus hfs minix ntfs vfat 
msdos fat jfs xfs reiserfs ext2 ip6table_filter ip6_tables ebtable_nat ebtables 
ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 
xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp 
iptable_filter ip_tables x_tables bridge stp llc rfcomm bnep bluetooth 
parport_pc ppdev lp parport lm90 mtdchar dm_multipath ofpart caam rtc_ds3232 
redboot cfi_cmdset_0002 cfi_probe at24 gen_probe cfi_util physmap_of chipreg 
scsi_dh map_funcs mpc85xx_edac i2c_mpc edac_core overlayfs mtdblock mtd_blkdevs 
mtd btrfs zlib_deflate libcrc32c raid10 raid456 async_pq async_xor xor 
async_memcpy async_raid6_recov fsl_pq_mdio aacraid raid6_pq async_tx raid1 
raid0 multipath linear
[573785.791303] NIP: c016e864 LR: c016e83c CTR: 00000000
[573785.796344] REGS: e782dbe0 TRAP: 0300   Not tainted  
(3.7.0-5-powerpc-e500mc)
[573785.803553] MSR: 00029002 <CE,EE,ME>  CR: 24004428  XER: 00000000
[573785.809738] DEAR: 00000000, ESR: 00000000
[573785.813823] TASK = df30b3c0[10846] 'qemu-system-ppc' THREAD: e782c000 CPU: 2
[573785.813823] GPR00: c016e83c e782dc90 df30b3c0 c0a9a304 00000001 d1035400 
e782c000 00000000 
[573785.813823] GPR08: c0a9a300 00000000 00000000 c0a96c90 0011da9f 103f65a8 
103f0000 00000009 
[573785.813823] GPR16: e782def8 c0a90000 e782df50 c0a9a220 da630dc0 418004fc 
d905c404 e782c000 
[573785.813823] GPR24: c0a80000 e9f35b48 eae63190 e8123d40 c1050800 c0aa0000 
d9722f40 d9722380 
[573785.849180] NIP [c016e864] remove_vm_area+0xb4/0x110
[573785.854221] LR [c016e83c] remove_vm_area+0x8c/0x110
[573785.859173] Call Trace:
[573785.861697] [e782dc90] [c016e83c] remove_vm_area+0x8c/0x110 (unreliable)
[573785.868479] [e782dcb0] [c016ea04] __vunmap+0x34/0x120
[573785.873609] [e782dcd0] [c004a848] free_gtlb+0x98/0x130
[573785.878827] [e782dcf0] [c004cd94] kvmppc_e500_tlb_uninit+0x24/0x50
[573785.885092] [e782dd00] [c004a1c4] kvmppc_core_vcpu_free+0x34/0x60
[573785.891264] [e782dd10] [c0044394] kvm_arch_destroy_vm+0x64/0xf0
[573785.897261] [e782dd30] [c003f890] kvm_put_kvm+0x120/0x180
[573785.902738] [e782dd50] [c003fde4] kvm_vcpu_release+0x24/0x40
[573785.908475] [e782dd60] [c0192c14] __fput+0xb4/0x250
[573785.913437] [e782dd90] [c007b750] task_work_run+0x100/0x130
[573785.919090] [e782ddb0] [c005997c] do_exit+0x16c/0x820
[573785.924220] [e782de00] [c005a2e4] do_group_exit+0x54/0xc0
[573785.929697] [e782de20] [c006d2ec] get_signal_to_deliver+0x16c/0x580
[573785.936046] [e782de70] [c0009bc8] do_signal+0x48/0x230
[573785.941263] [e782df30] [c0009f00] do_notify_resume+0xb0/0xd0
[573785.947003] [e782df40] [c0011ac0] do_user_signal+0x74/0xc4
[573785.952572] --- Exception: c00 at 0xed6ccc4
[573785.952572]     LR = 0xed6cca8
[573785.959955] Instruction dump:
[573785.962999] 387da304 485f35a9 3d20c0aa 8149a300 3909a300 7f9f5000 409e0018 
4800005c 
[573785.970832] 60000000 60000000 60000000 7d2a4b78 <812a0000> 7f9f4800 
409efff4 81090000 
[573785.978859] ---[ end trace f1cd8ea16d9b2ef7 ]---
[573785.983550] 
[573785.985156] Fixing recursive fault but reboot is needed!

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