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| Filename | Latest commit message | Latest commit date |
|---|---|---|
f0308fb070
If an ICMP packet comes in on the UDP socket backing an AF_RXRPC socket as
the UDP socket is being shut down, rxrpc_error_report() may get called to
deal with it after sk_user_data on the UDP socket has been cleared, leading
to a NULL pointer access when this local endpoint record gets accessed.
Fix this by just returning immediately if sk_user_data was NULL.
The oops looks like the following:
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
...
RIP: 0010:rxrpc_error_report+0x1bd/0x6a9
...
Call Trace:
? sock_queue_err_skb+0xbd/0xde
? __udp4_lib_err+0x313/0x34d
__udp4_lib_err+0x313/0x34d
icmp_unreach+0x1ee/0x207
icmp_rcv+0x25b/0x28f
ip_protocol_deliver_rcu+0x95/0x10e
ip_local_deliver+0xe9/0x148
__netif_receive_skb_one_core+0x52/0x6e
process_backlog+0xdc/0x177
net_rx_action+0xf9/0x270
__do_softirq+0x1b6/0x39a
? smpboot_register_percpu_thread+0xce/0xce
run_ksoftirqd+0x1d/0x42
smpboot_thread_fn+0x19e/0x1b3
kthread+0xf1/0xf6
? kthread_delayed_work_timer_fn+0x83/0x83
ret_from_fork+0x24/0x30
Fixes:
|
||
| 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.