* [Bug 205477] New: Useless address check in function __kvm_set_memory_region()
@ 2019-11-09 14:24 bugzilla-daemon
2019-11-11 18:15 ` [Bug 205477] " bugzilla-daemon
2019-11-12 7:10 ` bugzilla-daemon
0 siblings, 2 replies; 3+ messages in thread
From: bugzilla-daemon @ 2019-11-09 14:24 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=205477
Bug ID: 205477
Summary: Useless address check in function
__kvm_set_memory_region()
Product: Virtualization
Version: unspecified
Kernel Version: 5.2.0
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: kvm
Assignee: virtualization_kvm@kernel-bugs.osdl.org
Reporter: alexandr.sky@gmail.com
Regression: No
In function __kvm_set_memory_region() at virt/kvm/kvm_main.c:950, the condition
is false in any case.
950 if (mem->guest_phys_addr + mem->memory_size <
mem->guest_phys_addr)
951 goto out;
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* [Bug 205477] Useless address check in function __kvm_set_memory_region()
2019-11-09 14:24 [Bug 205477] New: Useless address check in function __kvm_set_memory_region() bugzilla-daemon
@ 2019-11-11 18:15 ` bugzilla-daemon
2019-11-12 7:10 ` bugzilla-daemon
1 sibling, 0 replies; 3+ messages in thread
From: bugzilla-daemon @ 2019-11-11 18:15 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=205477
Sean Christopherson (sean.j.christopherson@intel.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sean.j.christopherson@intel
| |.com
--- Comment #1 from Sean Christopherson (sean.j.christopherson@intel.com) ---
No, the check catches cases where @mem wraps to zero, e.g. guest_phys_addr =
0xfffffffffffff000 and memory_size >= 0x1000.
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* [Bug 205477] Useless address check in function __kvm_set_memory_region()
2019-11-09 14:24 [Bug 205477] New: Useless address check in function __kvm_set_memory_region() bugzilla-daemon
2019-11-11 18:15 ` [Bug 205477] " bugzilla-daemon
@ 2019-11-12 7:10 ` bugzilla-daemon
1 sibling, 0 replies; 3+ messages in thread
From: bugzilla-daemon @ 2019-11-12 7:10 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=205477
Alexandr Ivanov (alexandr.sky@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Alexandr Ivanov (alexandr.sky@gmail.com) ---
(In reply to Sean Christopherson from comment #1)
> No, the check catches cases where @mem wraps to zero, e.g. guest_phys_addr =
> 0xfffffffffffff000 and memory_size >= 0x1000.
Oh, sorry, I hadn't caught the idea.
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