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| Filename | Latest commit message | Latest commit date |
|---|---|---|
f39356261c
When the memset code was added to pgd_alloc(), it failed to consider
that kmem_cache_alloc() can return NULL. It's uncommon, but not
impossible under heavy memory contention. Example oops:
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc0000000000a4000
Oops: Kernel access of bad area, sig: 11 [#1]
LE SMP NR_CPUS=2048 NUMA pSeries
CPU: 70 PID: 48471 Comm: entrypoint.sh Kdump: loaded Not tainted 4.14.0-115.6.1.el7a.ppc64le #1
task: c000000334a00000 task.stack: c000000331c00000
NIP: c0000000000a4000 LR: c00000000012f43c CTR: 0000000000000020
REGS: c000000331c039c0 TRAP: 0300 Not tainted (4.14.0-115.6.1.el7a.ppc64le)
MSR: 800000010280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> CR: 44022840 XER: 20040000
CFAR: c000000000008874 DAR: 0000000000000000 DSISR: 42000000 SOFTE: 1
...
NIP [c0000000000a4000] memset+0x68/0x104
LR [c00000000012f43c] mm_init+0x27c/0x2f0
Call Trace:
mm_init+0x260/0x2f0 (unreliable)
copy_mm+0x11c/0x638
copy_process.isra.28.part.29+0x6fc/0x1080
_do_fork+0xdc/0x4c0
ppc_clone+0x8/0xc
Instruction dump:
409e000c b0860000 38c60002 409d000c 90860000 38c60004 78a0d183 78a506a0
7c0903a6 41820034 60000000 60420000 <f8860000> f8860008 f8860010 f8860018
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| 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 Restructured Text 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.