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- Shell 0.2%
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| Filename | Latest commit message | Latest commit date |
|---|---|---|
0fea83e06f
[ Upstream commit dfa7f709596be5ca46c070d4f8acbb344322056a ]
Drop monitor uses a work item that takes care of constructing and
sending netlink notifications to user space. In case drop monitor never
started to monitor, then the work item is uninitialized and not
associated with a function.
Therefore, a stop command from user space results in canceling an
uninitialized work item which leads to the following warning [1].
Fix this by not processing a stop command if drop monitor is not
currently monitoring.
[1]
[ 31.735402] ------------[ cut here ]------------
[ 31.736470] WARNING: CPU: 0 PID: 143 at kernel/workqueue.c:3032 __flush_work+0x89f/0x9f0
...
[ 31.738120] CPU: 0 PID: 143 Comm: dwdump Not tainted 5.5.0-custom-09491-g16d4077796b8 #727
[ 31.741968] RIP: 0010:__flush_work+0x89f/0x9f0
...
[ 31.760526] Call Trace:
[ 31.771689] __cancel_work_timer+0x2a6/0x3b0
[ 31.776809] net_dm_cmd_trace+0x300/0xef0
[ 31.777549] genl_rcv_msg+0x5c6/0xd50
[ 31.781005] netlink_rcv_skb+0x13b/0x3a0
[ 31.784114] genl_rcv+0x29/0x40
[ 31.784720] netlink_unicast+0x49f/0x6a0
[ 31.787148] netlink_sendmsg+0x7cf/0xc80
[ 31.790426] ____sys_sendmsg+0x620/0x770
[ 31.793458] ___sys_sendmsg+0xfd/0x170
[ 31.802216] __sys_sendmsg+0xdf/0x1a0
[ 31.806195] do_syscall_64+0xa0/0x540
[ 31.806885] entry_SYSCALL_64_after_hwframe+0x49/0xbe
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.