Hi,
David Miller wrote: [Wed Oct 01 2014, 04:44:55PM EDT]
> From: David Miller <davem@xxxxxxxxxxxxx>
> Date: Wed, 01 Oct 2014 16:42:01 -0400 (EDT)
>
> > From: Bob Picco <bpicco@xxxxxxxxxx>
> > Date: Wed, 1 Oct 2014 10:29:00 -0400
> >
> >> [root@ca-qasparc24 ~]# Unable to handle kernel NULL pointer dereference
> >> BUG: Bad page map in process cc1 pte:9800003fdd860690 pmd:183f3f4b6000
> >> page:000600007fbb0c00 count:107055216 mapcount:-524287 mapping: (null) index:0xfff8000107659c00
> >> page flags: 0x6c4b6e00004f56(error|referenced|dirty|active|owner_priv_1|arch_1|reserved|private|head)
> >> page dumped because: bad pte
> >
> > The first thing I notice is that the count, mapcount, and flags are all garbage.
> >
> > But not just random garbage, all of the non-zero bytes in the page
> > flags are in visible the ASCII character range.
> >
> > 0x6c = 'l'
> > 0x4b = 'K'
> > 0x6e = 'n'
> > 0x4f = 'O'
> > 0x56 = 'V'
> >
> > Anyways, just FYI...
>
> Also, Bob, that "Unable to handle kernel NULL pointer dereference"
> should have placed a good register dump and backtrace into the kernel
> logs, maybe you can provide that as well.
I'll let you examine this one closely. I was examining code and what was
observed on Sunday and not inspected closely.
On T4-2 I'm obtaining a solid baseline. sparc.git !THP and !HUGEPAGES
with spec-jbb. It appears good.
On T5-8 I did build sparc.git but not with as massive parallel make -j10.
Please let me know should you want more or whether this is worthless.
BUG: Bad page map in process cc1 pte:9800003fdd860690 pmd:183f3f4b6000
page:000600007fbb0c00 count:107055216 mapcount:-524287 mapping: (null) index:0xfff8000107659c00
page flags: 0x6c4b6e00004f56(error|referenced|dirty|active|owner_priv_1|arch_1|reserved|private|head)
page dumped because: bad pte
addr:0000000000124000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:12
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 497 PID: 19886 Comm: cc1 Tainted: G L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[000000000046aa90] do_group_exit+0x30/0xc0
[000000000046ab3c] SyS_exit_group+0x1c/0x40
[0000000000406234] linux_sparc_syscall+0x34/0x44
Disabling lock debugging due to kernel taint
BUG: Bad page map in process cc1 pte:9800003fdd860690 pmd:183f3c6e4000
page:000600007fbb0c00 count:107055215 mapcount:-524288 mapping: (null) index:0xfff8000107659c00
page flags: 0x6c4b6e00004f56(error|referenced|dirty|active|owner_priv_1|arch_1|reserved|private|head)
page dumped because: bad pte
addr:0000000000124000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:12
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 442 PID: 19996 Comm: cc1 Tainted: G B L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
Unable to handle kernel NULL pointer dereference
[000000000046a750] do_exit+0x130/0x440
tsk->{mm,active_mm}->context = 00000000000017c4
tsk->{mm,active_mm}->pgd = fff8003e95b7e000
[000000000046aa90] do_group_exit+0x30/0xc0
\|/ ____ \|/
"@'/ .. \`@"
/_| \__/ |_\
\__U_/
[000000000046ab3c] SyS_exit_group+0x1c/0x40
cc1(20076): Oops [#1]
[0000000000406234] linux_sparc_syscall+0x34/0x44
CPU: 105 PID: 20076 Comm: cc1 Tainted: G B L 3.17.0-rc7 #1
task: fff8003f07de88a0 ti: fff8003e95c88000 task.ti: fff8003e95c88000
TSTATE: 0000000011e01602 TPC: 000000000058ea2c TNPC: 000000000058ea30 Y: fcdcf300 Tainted: G B L
TPC: <kfree+0x8c/0x2a0>
g0: fff8003fddef7888 g1: 0006000000000000 g2: 00000000000003c8 g3: 0000000000be6800
g4: fff8003f07de88a0 g5: fff8003f5c98e000 g6: fff8003e95c88000 g7: 0000000000d62000
o0: 0000000000000000 o1: 0000000000000081 o2: 0000000000000020 o3: 0000000000000000
o4: 0000000000008000 o5: 0000000000000008 sp: fff8003e95c8aff1 ret_pc: 000000000063e4cc
RPC: <security_inode_permission+0x2c/0x40>
l0: 0000000000000000 l1: fff8003f0852f220 l2: 0000000000000000 l3: 0000000000643408
l4: 0000000000000014 l5: 00000000009fd430 l6: fff8003e95c88000 l7: 00000000005a1860
i0: fff8003f0852f220 i1: 0000000000000081 i2: 0000000000000010 i3: 0000000014fed5a6
i4: 0000000000666100 i5: 0000000000000078 i6: fff8003e95c8b0c1 i7: 0000000000643030
I7: <selinux_file_free_security+0x10/0x20>
Call Trace:
[0000000000643030] selinux_file_free_security+0x10/0x20
[000000000063c2b8] security_file_free+0x18/0x40
[00000000005a55c8] put_filp+0x28/0x60
[00000000005b336c] path_openat+0xec/0x4c0
[00000000005b3868] do_filp_open+0x28/0xa0
[00000000005a1728] do_sys_open+0x148/0x240
[00000000005a1884] SyS_open+0x24/0x40
[0000000000406234] linux_sparc_syscall+0x34/0x44
Caller[0000000000643030]: selinux_file_free_security+0x10/0x20
Caller[000000000063c2b8]: security_file_free+0x18/0x40
Caller[00000000005a55c8]: put_filp+0x28/0x60
Caller[00000000005b336c]: path_openat+0xec/0x4c0
Caller[00000000005b3868]: do_filp_open+0x28/0xa0
Caller[00000000005a1728]: do_sys_open+0x148/0x240
Caller[00000000005a1884]: SyS_open+0x24/0x40
Caller[0000000000406234]: linux_sparc_syscall+0x34/0x44
Caller[0000000000659d38]: constraint_expr_eval+0x658/0x6a0
Instruction DUMP: 84048002 80a36001 04400015 <e658a008> c459e2b8 a207a7e7 c658e198 84260002 f077a7f7
BUG: Bad page map in process cc1 pte:9800003fdd860690 pmd:3e95b92000
page:000600007fbb0c00 count:107055215 mapcount:-524289 mapping: (null) index:0xfff8000107659c00
page flags: 0x6c4b6e00004f56(error|referenced|dirty|active|owner_priv_1|arch_1|reserved|private|head)
page dumped because: bad pte
addr:0000000000124000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:12
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 105 PID: 20076 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[0000000000428500] die_if_kernel+0x1a0/0x340
[000000000097f498] unhandled_fault+0x78/0xe0
[000000000097f528] do_kernel_fault+0x28/0x100
[000000000097f820] do_sparc64_fault+0x220/0x7a0
[0000000000407b8c] sparc64_realfault_common+0x10/0x20
[000000000058ea2c] kfree+0x8c/0x2a0
[0000000000643030] selinux_file_free_security+0x10/0x20
BUG: Bad page map in process cc1 pte:9800003f0a92c690 pmd:3e95b92000
page:000600007e152580 count:0 mapcount:-1 mapping: (null) index:0x0
page flags: 0x0()
page dumped because: bad pte
addr:0000000000126000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:13
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 105 PID: 20076 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[0000000000428500] die_if_kernel+0x1a0/0x340
[000000000097f498] unhandled_fault+0x78/0xe0
[000000000097f528] do_kernel_fault+0x28/0x100
[000000000097f820] do_sparc64_fault+0x220/0x7a0
[0000000000407b8c] sparc64_realfault_common+0x10/0x20
[000000000058ea2c] kfree+0x8c/0x2a0
[0000000000643030] selinux_file_free_security+0x10/0x20
BUG: Bad page map in process cc1 pte:9800003f0c4d8690 pmd:3e95b92000
page:000600007e189b00 count:0 mapcount:-1 mapping: (null) index:0x0
page flags: 0x0()
page dumped because: bad pte
addr:0000000000128000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:14
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 105 PID: 20076 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[0000000000428500] die_if_kernel+0x1a0/0x340
[000000000097f498] unhandled_fault+0x78/0xe0
[000000000097f528] do_kernel_fault+0x28/0x100
[000000000097f820] do_sparc64_fault+0x220/0x7a0
[0000000000407b8c] sparc64_realfault_common+0x10/0x20
[000000000058ea2c] kfree+0x8c/0x2a0
[0000000000643030] selinux_file_free_security+0x10/0x20
BUG: Bad page map in process cc1 pte:9800003f0d876690 pmd:3e95b92000
page:000600007e1b0ec0 count:0 mapcount:-1 mapping:fff800010722cf60 index:0x0
page flags: 0x0()
page dumped because: bad pte
addr:000000000027a000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:bd
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 105 PID: 20076 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[0000000000428500] die_if_kernel+0x1a0/0x340
[000000000097f498] unhandled_fault+0x78/0xe0
[000000000097f528] do_kernel_fault+0x28/0x100
[000000000097f820] do_sparc64_fault+0x220/0x7a0
[0000000000407b8c] sparc64_realfault_common+0x10/0x20
[000000000058ea2c] kfree+0x8c/0x2a0
[0000000000643030] selinux_file_free_security+0x10/0x20
Unable to handle kernel NULL pointer dereference
tsk->{mm,active_mm}->context = 0000000000001835
tsk->{mm,active_mm}->pgd = fff8003e95bf0000
\|/ ____ \|/
"@'/ .. \`@"
/_| \__/ |_\
\__U_/
cc1(20161): Oops [#2]
CPU: 3 PID: 20161 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
task: fff8003e95e19d20 ti: fff8003e95e1c000 task.ti: fff8003e95e1c000
TSTATE: 0000000011e01602 TPC: 000000000058ea2c TNPC: 000000000058ea30 Y: fcdcf300 Tainted: G B D L
TPC: <kfree+0x8c/0x2a0>
g0: fff8003fddef7888 g1: 0006000000000000 g2: 0000000000000098 g3: 0000000000be6800
g4: fff8003e95e19d20 g5: fff8003f5c32e000 g6: fff8003e95e1c000 g7: 0000000000d62000
o0: 0000000000000000 o1: 0000000000000081 o2: 0000000000000020 o3: 0000000000000000
o4: 0000000000008000 o5: 0000000000000008 sp: fff8003e95e1eff1 ret_pc: 000000000063e4cc
RPC: <security_inode_permission+0x2c/0x40>
l0: 0000000000000000 l1: fff8003f0f5887e0 l2: 0000000000000000 l3: 0000000000643408
l4: 0000000000000014 l5: 00000000009e3e40 l6: fff8003e95e1c000 l7: 00000000005a1860
i0: fff8003f0f5887e0 i1: 0000000000000081 i2: 0000000000000010 i3: 000000007b401fe7
i4: 0000000000b9f723 i5: 0000000000000078 i6: fff8003e95e1f0c1 i7: 0000000000643030
I7: <selinux_file_free_security+0x10/0x20>
Call Trace:
[0000000000643030] selinux_file_free_security+0x10/0x20
[000000000063c2b8] security_file_free+0x18/0x40
[00000000005a55c8] put_filp+0x28/0x60
[00000000005b336c] path_openat+0xec/0x4c0
[00000000005b3868] do_filp_open+0x28/0xa0
[00000000005a1728] do_sys_open+0x148/0x240
[00000000005a1884] SyS_open+0x24/0x40
[0000000000406234] linux_sparc_syscall+0x34/0x44
Caller[0000000000643030]: selinux_file_free_security+0x10/0x20
Caller[000000000063c2b8]: security_file_free+0x18/0x40
Caller[00000000005a55c8]: put_filp+0x28/0x60
Caller[00000000005b336c]: path_openat+0xec/0x4c0
Caller[00000000005b3868]: do_filp_open+0x28/0xa0
Caller[00000000005a1728]: do_sys_open+0x148/0x240
Caller[00000000005a1884]: SyS_open+0x24/0x40
Caller[0000000000406234]: linux_sparc_syscall+0x34/0x44
Caller[0000000000659d38]: constraint_expr_eval+0x658/0x6a0
Instruction DUMP: 84048002 80a36001 04400015 <e658a008> c459e2b8 a207a7e7 c658e198 84260002 f077a7f7
BUG: Bad page map in process cc1 pte:9800003fdd860690 pmd:3e95e48000
page:000600007fbb0c00 count:107055215 mapcount:-524290 mapping: (null) index:0xfff8000107659c00
page flags: 0x6c4b6e00004f56(error|referenced|dirty|active|owner_priv_1|arch_1|reserved|private|head)
page dumped because: bad pte
addr:0000000000124000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:12
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 3 PID: 20161 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[0000000000428500] die_if_kernel+0x1a0/0x340
[000000000097f498] unhandled_fault+0x78/0xe0
[000000000097f528] do_kernel_fault+0x28/0x100
[000000000097f820] do_sparc64_fault+0x220/0x7a0
[0000000000407b8c] sparc64_realfault_common+0x10/0x20
[000000000058ea2c] kfree+0x8c/0x2a0
[0000000000643030] selinux_file_free_security+0x10/0x20
BUG: Bad page map in process cc1 pte:9800003f0a92c690 pmd:3e95e48000
page:000600007e152580 count:0 mapcount:-2 mapping: (null) index:0x0
page flags: 0x4(referenced)
page dumped because: bad pte
addr:0000000000126000 vm_flags:00000875 anon_vma: (null) mapping:fff8003f18a06a78 index:13
vma->vm_ops->fault: filemap_fault+0x8/0x440
vma->vm_file->f_op->mmap: ext4_file_mmap+0x8/0x40 [ext4]
CPU: 3 PID: 20161 Comm: cc1 Tainted: G B D L 3.17.0-rc7 #1
Call Trace:
[0000000000567394] print_bad_pte+0x134/0x1e0
[000000000056ade0] zap_pte_range+0x4c0/0x580
[000000000056afd4] unmap_page_range+0x134/0x220
[000000000056b11c] unmap_single_vma+0x5c/0xc0
[000000000056b1a8] unmap_vmas+0x28/0x60
[000000000056e248] exit_mmap+0x88/0x160
[0000000000465c74] mmput+0x54/0xe0
[00000000004691bc] exit_mm+0x13c/0x1c0
[000000000046a750] do_exit+0x130/0x440
[0000000000428500] die_if_kernel+0x1a0/0x340
[000000000097f498] unhandled_fault+0x78/0xe0
[000000000097f528] do_kernel_fault+0x28/0x100
[000000000097f820] do_sparc64_fault+0x220/0x7a0
[0000000000407b8c] sparc64_realfault_common+0x10/0x20
[000000000058ea2c] kfree+0x8c/0x2a0
[0000000000643030] selinux_file_free_security+0x10/0x20
BUG: Bad page map in process cc1 pte:9800003f0ccc6690 pmd:3e95e48000
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