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Linux kernel source tree
28cec7f08b
Error out if kvm_mmu_reload() fails when pre-faulting memory, as trying to
fault-in SPTEs will fail miserably due to root.hpa pointing at garbage.
Note, kvm_mmu_reload() can return -EIO and thus trigger the WARN on -EIO
in kvm_vcpu_pre_fault_memory(), but all such paths also WARN, i.e. the
WARN isn't user-triggerable and won't run afoul of warn-on-panic because
the kernel would already be panicking.
BUG: unable to handle page fault for address: 000029ffffffffe8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: Oops: 0000 [#1] PREEMPT SMP
CPU: 22 PID: 1069 Comm: pre_fault_memor Not tainted 6.10.0-rc7-332d2c1d713e-next-vm #548
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:is_page_fault_stale+0x3e/0xe0 [kvm]
RSP: 0018:ffffc9000114bd48 EFLAGS: 00010206
RAX: 00003fffffffffc0 RBX: ffff88810a07c080 RCX: ffffc9000114bd78
RDX: ffff88810a07c080 RSI: ffffea0000000000 RDI: ffff88810a07c080
RBP: ffffc9000114bd78 R08: 00007fa3c8c00000 R09: 8000000000000225
R10: ffffea00043d7d80 R11: 0000000000000000 R12: ffff88810a07c080
R13: 0000000100000000 R14: ffffc9000114be58 R15: 0000000000000000
FS: 00007fa3c9da0740(0000) GS:ffff888277d80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000029ffffffffe8 CR3: 000000011d698000 CR4: 0000000000352eb0
Call Trace:
<TASK>
kvm_tdp_page_fault+0xcc/0x160 [kvm]
kvm_mmu_do_page_fault+0xfb/0x1f0 [kvm]
kvm_arch_vcpu_pre_fault_memory+0xd0/0x1a0 [kvm]
kvm_vcpu_ioctl+0x761/0x8c0 [kvm]
__x64_sys_ioctl+0x82/0xb0
do_syscall_64+0x5b/0x160
entry_SYSCALL_64_after_hwframe+0x4b/0x53
</TASK>
Modules linked in: kvm_intel kvm
CR2: 000029ffffffffe8
---[ end trace 0000000000000000 ]---
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.