Suppose I write some LKM with networking (netfilter) activity and I need to do some tampering with skb including skb_pull(). So I have to take care about is skb linear or not before pulling.
If I generally don't want to have an opportunity to face with non-linear (paged) skb in my system, how can I do this?
In other words: how can I disable producing paged skbs in Linux kernel?
Is there some option on network interfaces to be set up with ethtool or something else?
How can I disable producing paged (non-linear) skb's in Linux kernel?
445 views Asked by budoattack At
1
There are 1 answers
Related Questions in C
- How to call a C language function from x86 assembly code?
- What does: "char *argv[]" mean?
- User input sanitization program, which takes a specific amount of arguments and passes the execution to a bash script
- How to crop a BMP image in half using C
- How can I get the difference in minutes between two dates and hours?
- Why will this code compile although it defines two variables with the same name?
- Compiling eBPF program in Docker fails due to missing '__u64' type
- Why can't I use the file pointer after the first read attempt fails?
- #include Header files in C with definition too
- OpenCV2 on CLion
- What is causing the store latency in this program?
- How to refer to the filepath of test data in test sourcecode?
- 9 Digit Addresses in Hexadecimal System in MacOS
- My server TCP doesn't receive messages from the client in C
- Printing the characters obtained from the array s using printf?
Related Questions in LINUX
- Is there some way to use printf to print a horizontal list of decrementing hex digits in NASM assembly on Linux
- Why does Hugo generate different taxonomy-related HTML on different OS's?
- Writes in io_uring do not advance the file offset
- Why `set -o pipefail` gives different output even though the pipe is not failing
- what really controls the permissions: UID or eUID?
- Compiling eBPF program in Docker fails due to missing '__u64' type
- Docker container unable to make HTTPS requests to external API
- Whow to use callback_query_handler in Python 3.10
- Create kea runtime directory at startup in Yocto image
- Problem on CPU scheduling algorithms in OS
- How to copy files into the singularity sandbox?
- Android kernel error: undefined reference to `get_hw_version_platform'
- Is there a need for BPF Linux namespace?
- Error when trying to execute a binary compiled in a Kali Linux machine on an Ubuntu system
- Issue with launching application after updating ElectronJs to version 28.0.0 on Windows and Linux
Related Questions in LINUX-KERNEL
- Android kernel error: undefined reference to `get_hw_version_platform'
- Is there a need for BPF Linux namespace?
- Facing fatal errors while running "yum update" command on CentOS 7/Cloudlinux 7
- crash utility itself crashes while decoding kdump generated from null pointer dereference in kernel module
- How to compile the Linux kernel with -O0 for more detailed debug?
- Linux support for parallel Pixel data Image sensor
- Can't upgrade to newest version of linux-image-6.5.0-26-generic
- How to protect a page so that it cannot be write in mips arch?
- How to extract the .img file into normal kernel source file in the linux?
- Storage size of struct hash_desc desc; isn't known
- How can I intercept failed file openning calls?
- struct nameidata-Linux Kernel Module
- How to modify a 'struct msghdr' in Linux Kernel Module?
- How to allocate 500MB+ physically contiguous memory in a Linux kernel module and copy data to that memory from a userspace process?
- Hyper Threading: nosmt in grub configuration
Related Questions in NETFILTER
- Netfilter Module to Log HTTP Headers
- How to insert an ip packet to linux network stack on the egress path?
- Why is ingress packet not getting DNAT 'edin NAT PREROUTING chain with nftables?
- using netfilter to capture UDP data but i got lot of packet loss
- Problem with netfilter queue, iptables or C ++
- How to make local packets go through nat / prerouting (they go directly to filter / input)
- Mangled packets from libnetfilter_queue do not reach destination
- Adding data to an outgoing packet with netfilter in a kernel module
- Reject a packet with nfqueue / setverdict (disconnect a client)
- Netfilter Netdev ingress hook, skb->data point to packet(L3) and not to frame(L2)
- Netfilter - segfault in libnftables.so.1.0.0
- filer syn flood with hashlimit in iptables inside docker container
- Get packet data in Linux kernel module with netfilter
- How to make IpTable Rules immutable in linux
- How to automatically kill idle tcp connections after a pre-determined unit of time on Linux?
Related Questions in SKB
- Why does loopback timestampt then clear the timestamp for packets in xmit?
- Netfilter Netdev ingress hook, skb->data point to packet(L3) and not to frame(L2)
- in linux port_mirror,why skb_clone can change nskb->data?
- How to get the entire skb data content instead of the address in eBPF/libbpf?
- Can't get curl response after updating port number and checksum in TC with ebpf
- Linux skb packet count header and metadata
- skb_tail_pointer(skb) not work correctly. And point the udp header tail wrongly
- XDP and sk_buff
- How to extract entire packet from skb including ethernet header, ip, and tcp plus pay load in poll method of device driver
- How can I disable producing paged (non-linear) skb's in Linux kernel?
- The purpose of wrapping a pointer in struct in C
- What's the correct way to process all the payload of a sk_buff packet in Linux
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Popular Tags
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
I think you can refer to the implementation of bpf_skb_pull_data in the kernel, this bpf helper function can pull no-linear data into linear.
https://man7.org/linux/man-pages/man7/bpf-helpers.7.html