sys/linux: things to test

dvyukov commented 6 years ago

List of things we need descriptions for (dynamically updated). Note : some of these things might be very hard to test, while other are easy.

Before starting work on a subsystem, grep existing descriptions if the subsystem is already [partially] described. This list may be outdated or imply extending existing basic descriptions.

Besides this list, new things are constantly added to the kernel. kernelnewbies.org lists new things in each release. Also queries along the following lines can be used to check for features added in each release:

git diff -U0 v5.17 v5.18 include/uapi/*.h | grep "+++"
git diff -U0 v5.17 HEAD include/uapi/*.h | egrep "^\+.*\s_IO" | less
git diff -U0 v5.17 HEAD include/uapi/*.h | egrep -v "^(index|diff|---|@|-|\+$|\+/\*|\+ \*)" | less

For introduction to Linux kernel syscalls see these 0xax.gitbooks.io articles: part 1, part 4, part 5. Bootlin code search is very useful for browsing kernel sources.

Assorted devices:

/dev/vfio
stub video/media devices (CONFIG_VIDEO_VIMC, CONFIG_VIDEO_VIM2M, CONFIG_VIDEO_VIVID, CONFIG_VIDEO_VICODEC) /dev/video*, /dev/media*, /dev/v4l* allow to test large generic parts of media stack; there are some descriptions in sys/linux/dev_video4linux.txt but they need to be double checked
CONFIG_VIDEO_MEM2MEM_DEINTERLACE
CONFIG_VIRTIO_MEM (figure out how to enable it in qemu)
drivers/mtd/ubi
/dev/dma_heap/system

Assorted:

CONFIG_BLK_DEV_UBLK
quotactl_fd
fsinfo and fchmodat4
NOTIFY_MOUNT, watch_sb, KEYCTL_WATCH_KEY
blkzoned (lots of descriptions are in place, but syzkaller does not seem to actually reach the code)
SK_DIAG_BPF_STORAGE_REQ_MAP_FD
perf trace filters (parse something insanely complex: kernel/trace/trace_events_filter.c)
filesystem-specific ioctl's on files and dir (e.g. ext4 and btrfs have a few, also see #1020)
binderfs (see also this discussion)
loopfs (if it lands at least in linux-next)
squashfs
ubifs
dmcrypt, dmverity, fs-verify
more netlink descriptions (in particular, netlink/generic subsystems)
set breakpoints/watchpoints on own process using ptrace/perf_event_open
create interesting frames for rt_sigreturn to restore (in particular FP state)

Sound:

/proc/asound/*
sound/core/compress_offload.c (figure out how to enable it in qemu)
SNDRV_CTL_ELEMTYPE*

Network:

better conntrack coverage
NS_GET_INIT_PID
XFRM_ESPINTCP
BRIDGE_MRP
TCA_FLOWER_KEY_MPLS_OPTS
packet scheduler (include/uapi/linux/pkt_sched.h)
mac80211/ETH_P_PREAUTH
VLANs (can be created with "ip add -type vlan" on top of veth)
jumbo frames (not sure what's the current coverage, specifically inject huge packets?)
gate control action (TCA_GATE_ENTRY_INDEX)

USB (docs):

USB/IP client and server
/sys/kernel/debug/usb/devices
Legacy gadget drivers (g_hid.ko, etc.)
ConfigFS gadget functions

External USB (sys/linux/vusb.txt):

CONFIG_USB_STORAGE
CONFIG_SND_USB
CONFIG_USB_RTL8150
CONFIG_USB_RTL8152
CONFIG_USB_NET_AX88179_178A
CONFIG_USB_NET_AX8817X
Probably many others

External network (sys/linux/vnet.txt):

SCTP
Probably many others

Bluetooth (sys/linux/socket_bluetooth.txt):

What is covered? What isn't yet?

GPIO: the following configs create some test devices in VMs (GPIOLIB, GPIO_AGGREGATOR, GPIO_VIRTIO, GPIO_MOCKUP, GPIO_SIM)

HDMI (#3725)

CONFIG_CACHESTAT_SYSCALL

dvyukov commented 6 years ago

fou is added in https://github.com/google/syzkaller/commit/7c62f718046a2204a35cfe8850f9006b686b1c22

dvyukov commented 6 years ago

IPVS is added in https://github.com/google/syzkaller/commit/0ca7878bc33e9f95369c609dd1eb56a6405479cc

necipfazil commented 4 years ago

I am working on testing Qualcomm IPC Router.

JiahengHu commented 4 years ago

Working on testing openat2

albertlinde commented 4 years ago

Working on raw char device (drivers/char/raw.c).

necipfazil commented 4 years ago

I am working on testing cgroups v1.

chmnchiang commented 4 years ago

I am working on IP tunnels (if_tunnel.h).

necipfazil commented 4 years ago

I am working on DEVLINK_CMD_TRAP_POLICER.

necipfazil commented 4 years ago

I am working on ETHTOOL_MSG_PAUSE_GET.

handeharputlu commented 4 years ago

I am working on dev/snapshot

JiahengHu commented 4 years ago

Working on close_range syscall

dvyukov commented 4 years ago

@JiahengHu here are relevant commits just in case: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=278a5fbaed89dacd04e9d052f4594ffd0e0585de https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=349057e6f9c71264a54503e2ed6c0627e8369dab

JiahengHu commented 4 years ago

Working on CLONE_CLEAR_SIGHAND/CLONE_INTO_CGROUP/CLONE_NEWTIME

necipfazil commented 4 years ago

I am working on io_uring.

JiahengHu commented 4 years ago

Working on SECCOMP_IOCTL_NOTIF_ADDFD

ruxandrastancioi commented 4 years ago

Working on IPV6_RPL_LWTUNNEL

chmnchiang commented 4 years ago

Working on /dev/mixer.

handeharputlu commented 4 years ago

Working on /dev/sequencer

chmnchiang commented 4 years ago

Working on BPF_LSM.

albertlinde commented 4 years ago

Working on RTM_NEWLINKPROP.

handeharputlu commented 3 years ago

Working on /dev/snd/hwCD

albertlinde commented 3 years ago

Working on BRIDGE_MRP.

handeharputlu commented 3 years ago

Working on USB/IP client and server .

ruxandrastancioi commented 3 years ago

Working on TCA_FLOWER_KEY_MPLS_OPTS

chmnchiang commented 3 years ago

Working on /dev/qat_adf_ctl

a-nogikh commented 3 years ago

Working on 802.11

mirasharf commented 3 years ago

Working on /dev/autofs

chmnchiang commented 3 years ago

Working on various types of bpf programs.

maramihali commented 3 years ago

Working on FQ_PIE from include/uapi/linux/pkt_sched.h

google / syzkaller

sys/linux: things to test #533