bugzilla-daemon at freedesktop.org
2016-Oct-30 17:34 UTC
[Nouveau] [Bug 98506] New: Pagefault in gf100_vm_flush
https://bugs.freedesktop.org/show_bug.cgi?id=98506
Bug ID: 98506
Summary: Pagefault in gf100_vm_flush
Product: xorg
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Driver/nouveau
Assignee: nouveau at lists.freedesktop.org
Reporter: karolherbst at gmail.com
QA Contact: xorg-team at lists.x.org
Created attachment 127629
--> https://bugs.freedesktop.org/attachment.cgi?id=127629&action=edit
kernel oops
got a pagefault today, attached below
gf100_vm_flush+0xc8 is
https://github.com/karolherbst/nouveau/blob/caab1df6e3b32d2eca7e82819a7dd4cb99911d71/drm/nouveau/nvkm/subdev/mmu/gf100.c#L183
-+ gdb mistake
was running chromium prime offloaded and civilisation 5 with mareks gl
threading branch
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bugzilla-daemon at freedesktop.org
2016-Oct-30 17:37 UTC
[Nouveau] [Bug 98506] Pagefault in gf100_vm_flush
https://bugs.freedesktop.org/show_bug.cgi?id=98506 --- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> --- Karol, can you load up nouveau.ko and run "disassemble gf100_vm_flush" (to completion) and include that? All code ======= 0: 38 e1 cmp %ah,%cl 2: a9 00 00 ff 00 test $0xff0000,%eax 7: 74 cb je 0xffffffffffffffd4 9: 48 81 fb ff 93 35 77 cmp $0x773593ff,%rbx 10: 0f 87 ae 00 00 00 ja 0xc4 16: 49 8b 84 24 80 00 00 mov 0x80(%r12),%rax 1d: 00 1e: 31 db xor %ebx,%ebx 20: 48 8d b0 b8 0c 10 00 lea 0x100cb8(%rax),%rsi 27: 49 8b 46 10 mov 0x10(%r14),%rax 2b:* 48 8b b8 90 00 00 00 mov 0x90(%rax),%rdi <-- trapping instruction 32: 48 c1 ef 08 shr $0x8,%rdi 36: e8 68 6f 38 e1 callq 0xffffffffe1386fa3 3b: 49 rex.WB 3c: 8b .byte 0x8b 3d: 84 24 80 test %ah,(%rax,%rax,4) Code starting with the faulting instruction ========================================== 0: 48 8b b8 90 00 00 00 mov 0x90(%rax),%rdi 7: 48 c1 ef 08 shr $0x8,%rdi b: e8 68 6f 38 e1 callq 0xffffffffe1386f78 10: 49 rex.WB 11: 8b .byte 0x8b 12: 84 24 80 test %ah,(%rax,%rax,4) -- You are receiving this mail because: You are the assignee for the bug. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/nouveau/attachments/20161030/f0e74349/attachment.html>
bugzilla-daemon at freedesktop.org
2016-Oct-30 17:41 UTC
[Nouveau] [Bug 98506] Pagefault in gf100_vm_flush
https://bugs.freedesktop.org/show_bug.cgi?id=98506 --- Comment #2 from Karol Herbst <karolherbst at gmail.com> --- (gdb) disassemble gf100_vm_flush Dump of assembler code for function gf100_vm_flush: 0x0000000000050f60 <+0>: push %rbp 0x0000000000050f61 <+1>: mov %rsp,%rbp 0x0000000000050f64 <+4>: push %r15 0x0000000000050f66 <+6>: push %r14 0x0000000000050f68 <+8>: push %r13 0x0000000000050f6a <+10>: mov %rdi,%r13 0x0000000000050f6d <+13>: push %r12 0x0000000000050f6f <+15>: push %rbx 0x0000000000050f70 <+16>: sub $0x18,%rsp 0x0000000000050f74 <+20>: mov 0xb0(%rdi),%edx 0x0000000000050f7a <+26>: mov (%rdi),%rax 0x0000000000050f7d <+29>: cmp $0x1,%edx 0x0000000000050f80 <+32>: mov 0x10(%rax),%r12 0x0000000000050f84 <+36>: sbb %ebx,%ebx 0x0000000000050f86 <+38>: add $0x20,%rax 0x0000000000050f8a <+42>: mov %rax,%rdi 0x0000000000050f8d <+45>: mov %rax,-0x40(%rbp) 0x0000000000050f91 <+49>: and $0xfffffffc,%ebx 0x0000000000050f94 <+52>: callq 0x50f99 <gf100_vm_flush+57> 0x0000000000050f99 <+57>: mov 0x60(%r13),%r14 0x0000000000050f9d <+61>: lea 0x60(%r13),%rax 0x0000000000050fa1 <+65>: add $0x5,%ebx 0x0000000000050fa4 <+68>: or $0x80000000,%ebx 0x0000000000050faa <+74>: mov %rax,-0x30(%rbp) 0x0000000000050fae <+78>: mov %ebx,-0x34(%rbp) 0x0000000000050fb1 <+81>: cmp %rax,%r14 0x0000000000050fb4 <+84>: je 0x510a9 <gf100_vm_flush+329> 0x0000000000050fba <+90>: mov 0x198(%r12),%r13 0x0000000000050fc2 <+98>: xor %ebx,%ebx 0x0000000000050fc4 <+100>: mov %r13,%rdi 0x0000000000050fc7 <+103>: callq 0x50fcc <gf100_vm_flush+108> 0x0000000000050fcc <+108>: mov %rax,%r15 0x0000000000050fcf <+111>: jmp 0x50feb <gf100_vm_flush+139> 0x0000000000050fd1 <+113>: mov %r13,%rdi 0x0000000000050fd4 <+116>: callq 0x50fd9 <gf100_vm_flush+121> 0x0000000000050fd9 <+121>: sub %r15,%rax 0x0000000000050fdc <+124>: mov %rax,%rbx 0x0000000000050fdf <+127>: cmp $0x773593ff,%rax 0x0000000000050fe5 <+133>: ja 0x510c1 <gf100_vm_flush+353> 0x0000000000050feb <+139>: mov 0x80(%r12),%rax 0x0000000000050ff3 <+147>: lea 0x100c80(%rax),%rdi 0x0000000000050ffa <+154>: callq 0x50fff <gf100_vm_flush+159> 0x0000000000050fff <+159>: test $0xff0000,%eax 0x0000000000051004 <+164>: je 0x50fd1 <gf100_vm_flush+113> 0x0000000000051006 <+166>: cmp $0x773593ff,%rbx 0x000000000005100d <+173>: ja 0x510c1 <gf100_vm_flush+353> 0x0000000000051013 <+179>: mov 0x80(%r12),%rax 0x000000000005101b <+187>: xor %ebx,%ebx 0x000000000005101d <+189>: lea 0x100cb8(%rax),%rsi 0x0000000000051024 <+196>: mov 0x10(%r14),%rax 0x0000000000051028 <+200>: mov 0x90(%rax),%rdi 0x000000000005102f <+207>: shr $0x8,%rdi 0x0000000000051033 <+211>: callq 0x51038 <gf100_vm_flush+216> 0x0000000000051038 <+216>: mov 0x80(%r12),%rax 0x0000000000051040 <+224>: mov -0x34(%rbp),%edi 0x0000000000051043 <+227>: lea 0x100cbc(%rax),%rsi 0x000000000005104a <+234>: callq 0x5104f <gf100_vm_flush+239> 0x000000000005104f <+239>: mov 0x198(%r12),%r13 0x0000000000051057 <+247>: mov %r13,%rdi 0x000000000005105a <+250>: callq 0x5105f <gf100_vm_flush+255> 0x000000000005105f <+255>: mov %rax,%r15 0x0000000000051062 <+258>: jmp 0x5107a <gf100_vm_flush+282> 0x0000000000051064 <+260>: mov %r13,%rdi 0x0000000000051067 <+263>: callq 0x5106c <gf100_vm_flush+268> 0x000000000005106c <+268>: sub %r15,%rax 0x000000000005106f <+271>: mov %rax,%rbx 0x0000000000051072 <+274>: cmp $0x773593ff,%rax 0x0000000000051078 <+280>: ja 0x510ea <gf100_vm_flush+394> 0x000000000005107a <+282>: mov 0x80(%r12),%rax 0x0000000000051082 <+290>: lea 0x100c80(%rax),%rdi 0x0000000000051089 <+297>: callq 0x5108e <gf100_vm_flush+302> 0x000000000005108e <+302>: test $0x80,%ah 0x0000000000051091 <+305>: je 0x51064 <gf100_vm_flush+260> 0x0000000000051093 <+307>: cmp $0x773593ff,%rbx 0x000000000005109a <+314>: ja 0x510ea <gf100_vm_flush+394> 0x000000000005109c <+316>: mov (%r14),%r14 0x000000000005109f <+319>: cmp -0x30(%rbp),%r14 0x00000000000510a3 <+323>: jne 0x50fba <gf100_vm_flush+90> 0x00000000000510a9 <+329>: mov -0x40(%rbp),%rdi 0x00000000000510ad <+333>: callq 0x510b2 <gf100_vm_flush+338> 0x00000000000510b2 <+338>: add $0x18,%rsp 0x00000000000510b6 <+342>: pop %rbx 0x00000000000510b7 <+343>: pop %r12 0x00000000000510b9 <+345>: pop %r13 0x00000000000510bb <+347>: pop %r14 0x00000000000510bd <+349>: pop %r15 0x00000000000510bf <+351>: pop %rbp 0x00000000000510c0 <+352>: retq 0x00000000000510c1 <+353>: mov 0x10(%r12),%rdi 0x00000000000510c6 <+358>: mov $0x0,%r8 0x00000000000510cd <+365>: mov $0xb5,%ecx 0x00000000000510d2 <+370>: mov $0x0,%rdx 0x00000000000510d9 <+377>: mov $0x0,%rsi 0x00000000000510e0 <+384>: callq 0x510e5 <gf100_vm_flush+389> 0x00000000000510e5 <+389>: jmpq 0x51013 <gf100_vm_flush+179> 0x00000000000510ea <+394>: mov 0x10(%r12),%rdi 0x00000000000510ef <+399>: mov $0x0,%r8 0x00000000000510f6 <+406>: mov $0xbe,%ecx 0x00000000000510fb <+411>: mov $0x0,%rdx 0x0000000000051102 <+418>: mov $0x0,%rsi 0x0000000000051109 <+425>: callq 0x5110e <gf100_vm_flush+430> 0x000000000005110e <+430>: jmp 0x5109c <gf100_vm_flush+316> 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bugzilla-daemon at freedesktop.org
2016-Oct-30 18:06 UTC
[Nouveau] [Bug 98506] Pagefault in gf100_vm_flush
https://bugs.freedesktop.org/show_bug.cgi?id=98506 --- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> --- OK, so it's very clearly this line: nvkm_wr32(device, 0x100cb8, vpgd->obj->addr >> 8); (note the shift by 8 that comes right after in the decoded code sequence), and the issue is that vpgd->obj is bad: RAX: 000000041ad09000 CR2: 000000041ad09090 where the faulting instruction is "mov 0x90(%rax),%rdi". It seems like obj is a nvkm_gpuobj, which in turn is just a regular object that should come out of kernel memory. However the RAX value doesn't seem like a usual kernel memory address, which means it's uninitialized. -- You are receiving this mail because: You are the assignee for the bug. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/nouveau/attachments/20161030/af83e6bd/attachment.html>
bugzilla-daemon at freedesktop.org
2019-Dec-04 09:18 UTC
[Nouveau] [Bug 98506] Pagefault in gf100_vm_flush
https://bugs.freedesktop.org/show_bug.cgi?id=98506
Martin Peres <martin.peres at free.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |MOVED
Status|NEW |RESOLVED
--- Comment #4 from Martin Peres <martin.peres at free.fr> ---
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