From 33a154a96e71a34a1bcca9f40da343dbbf7b38b4 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 1 Oct 2026 14:52:55 +0000 Subject: selftests/bpf: Test packet range of pointers sharing an id Add tests where two packet pointers share an id and tightening one pointer's umax from its var_off would put it less than their constant distance from the other's umax: with an index & 0x38 capped at 50, the base pointer keeps umax 50, so the pointer 8 bytes further on must keep umax 58, even though its known bits allow at most 56. These refused a valid program or accepted an out-of-bounds access before the fix: - check the advanced copy, load through the base: valid, was refused; - check the base, load the byte at base + 1 through a copy advanced by 8: was accepted; - check base + 4, load 4 bytes at base + 2 through base + 8: reads two bytes past the checked range, was accepted; - the same as the second with data_meta pointers checked against data: was accepted. These pass with and without the fix and cover nearby paths: - subtract an unknown scalar from a checked pointer and load below it (the range is kept across a new id); - reach a load through two paths whose checks cover 8 and 7 bytes after the loaded pointer; the second path must not be pruned by the first; - spill a copy of a pointer, check the pointer, fill the copy and load one byte past the checked range: the load is refused, and the copy has the range of the check. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- scripts/ver_linux | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100755 scripts/ver_linux (limited to 'scripts/ver_linux') diff --git a/scripts/ver_linux b/scripts/ver_linux new file mode 100755 index 000000000..00bdaf30d --- /dev/null +++ b/scripts/ver_linux @@ -0,0 +1,97 @@ +#!/usr/bin/awk -f +# SPDX-License-Identifier: GPL-2.0 +# Before running this script please ensure that your PATH is +# typical as you use for compilation/installation. I use +# /bin /sbin /usr/bin /usr/sbin /usr/local/bin, but it may +# differ on your system. + +BEGIN { + usage = "If some fields are empty or look unusual you may have an old version.\n" + usage = usage "Compare to the current minimal requirements in Documentation/process/changes.rst\n" + print usage + + system("uname -a") + printf("\n") + + vernum = "[0-9]+([.]?[0-9]+)+" + libc = "libc[.]so[.][0-9]+$" + libcpp = "(libg|stdc)[+]+[.]so([.][0-9]+)+$" + + printversion("bash", version("bash --version")) + printversion("bc", version("bc --version")) + printversion("bindgen", version("bindgen --version")) + printversion("binutils", version("ld -v")) + printversion("bison", version("bison --version")) + printversion("btrfs-progs", version("btrfs --version")) + printversion("Clang", version("clang --version")) + printversion("Console-tools", version("loadkeys -V")) + printversion("Dynamic linker (ldd)", version("ldd --version")) + printversion("e2fsprogs", version("e2fsck -V")) + printversion("flex", version("flex --version")) + printversion("gdb", version("gdb -version")) + printversion("GNU awk", version("gawk --version")) + printversion("GNU C", version("gcc -dumpversion")) + printversion("GNU make", version("make --version")) + printversion("GNU tar", version("tar --version")) + printversion("GRUB2", version("grub2-install --version")) + printversion("GRUB", version("grub-install --version")) + printversion("gtags", version("gtags --version")) + printversion("iptables", version("iptables -V")) + printversion("Isdn4k-utils", version("isdnctrl")) + printversion("jfsutils", version("fsck.jfs -V")) + printversion("Kbd", version("loadkeys -V")) + printversion("kmod", version("kmod -V")) + + while ("ldconfig -p 2>/dev/null" | getline > 0) + if ($NF ~ libc || $NF ~ libcpp) + if (!seen[ver = version("readlink " $NF)]++) + printversion("Linux C" ($NF ~ libcpp? "++" : "") " Library", ver) + + printversion("mcelog", version("mcelog --version")) + printversion("mkimage", version("mkimage --version")) + printversion("Module-init-tools", version("depmod -V")) + printversion("Mount", version("mount --version")) + printversion("Net-tools", version("ifconfig --version")) + printversion("nfs-utils", version("showmount --version")) + printversion("openssl", version("openssl version")) + printversion("pahole", version("pahole --version")) + printversion("Pcmcia-cs", version("cardmgr -V")) + printversion("pcmciautils", version("pccardctl -V")) + printversion("PPP", version("pppd --version")) + printversion("procps", version("ps --version")) + printversion("Python", version("python3 -V")) + printversion("quota-tools", version("quota -V")) + printversion("Rust", version("rustc --version")) + printversion("Sh-utils", version("expr --v")) + printversion("Sphinx", version("sphinx-build --version")) + printversion("squashfs-tools", version("mksquashfs -version")) + printversion("udev", version("udevadm --version")) + printversion("util-linux", version("mount --version")) + printversion("Wireless-tools", version("iwconfig --version")) + printversion("xfsprogs", version("xfs_db -V")) + + while ("sort /proc/modules" | getline > 0) { + mods = mods sep $1 + sep = " " + } + printversion("Modules Loaded", mods) +} + +function version(cmd, ver) { + cmd = cmd " 2>&1" + while (cmd | getline > 0) { + if (match($0, vernum)) { + ver = substr($0, RSTART, RLENGTH) + break + } + } + close(cmd) + return ver +} + +function printversion(name, value, ofmt) { + if (value != "") { + ofmt = "%-20s\t%s\n" + printf(ofmt, name, value) + } +} -- cgit v1.3.1