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| Filename | Latest commit message | Latest commit date |
|---|---|---|
f29cdfbe33
tcf_skbmod_init() can fail after the idr has been successfully reserved.
When this happens, every subsequent attempt to configure skbmod rules
using the same idr value will systematically fail with -ENOSPC, unless
the first attempt was done using the 'replace' keyword:
# tc action add action skbmod swap mac index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action skbmod swap mac index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action skbmod swap mac index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in tcf_skbmod_init(), ensuring that tcf_idr_release() is called
on the error path when the idr has been reserved, but not yet inserted.
Also, don't test 'ovr' in the error path, to avoid a 'replace' failure
implicitly become a 'delete' that leaks refcount in act_skbmod module:
# rmmod act_skbmod; modprobe act_skbmod
# tc action add action skbmod swap mac index 100
# tc action add action skbmod swap mac continue index 100
RTNETLINK answers: File exists
We have an error talking to the kernel
# tc action replace action skbmod swap mac continue index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action list action skbmod
#
# rmmod act_skbmod
rmmod: ERROR: Module act_skbmod is in use
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.