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linux/tools/testing/selftests
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Willem de Bruijn dbf34acdfb selftests: drv-net: so_txtime: fix qdisc replace with handle 
The blamed commit updated a tc replace command by adding a handle.

  -    tc(f"qdisc replace dev {ifname} root {qdisc} {optargs}")
  +    tc(f"qdisc replace dev {ifname} root handle 1: {qdisc} {optargs}")

This breaks the test if the root qdisc already has that handle and is of
different kind, with

  "Invalid qdisc name: must match existing qdisc."

If no handle is asked, or the kind differs, tc replace removes the old
qdisc and grafts a new one.

If a handle is asked and exists, tc replace tries to change the qdisc
in place, for which the kind must be the same.

It does not trigger in all setups, like netdevsim or debian 13, which
do not have root handle 1:. But it is a common root handle.

Solve the bug by first deleting the existing root qdisc if one exists.

Wrap that command in a try block, because it will fail for default
qdiscs with handle 0: with

  "Error: Cannot delete qdisc with handle of zero."

Reported-by: Jakub Kicinski <kuba@kernel.org>
Closes: https://lore.kernel.org/netdev/20260810183118.32d5c06a@kernel.org/
Fixes: ef3d6cca02 ("selftests: drv-net: so_txtime: only send test traffic to sch_etf")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260811182856.2702163-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-12 17:20:07 -07:00
..
acct selftests/acct: add taskstats TGID retention test 2026-05-28 21:24:41 -07:00
alsa selftests/alsa: Fix format specifier and function mismatch in mixer-test 2026-07-06 10:24:05 +02:00
amd-pstate
arm64 selftests/arm64: fix spelling errors in comments 2026-07-02 11:44:43 +01:00
bpf Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-07-30 12:53:19 -07:00
breakpoints selftests: fix ARCH normalization to handle command-line argument 2026-03-27 21:19:44 -07:00
cachestat selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
capabilities selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
cgroup mm.git review status for mm-hotfixes-stable..mm-stable 2026-06-19 10:14:34 -07:00
clone3 selftests/clone3: fix wild pointer access of getline due to missing init 2026-07-28 17:37:33 -07:00
connector selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
core selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
coredump selftests: check pidfd_info->coredump_code correctness 2026-03-23 16:29:15 +01:00
cpu-hotplug selftests/cpu-hotplug: Fix check for cpu hotplug not supported 2026-03-31 16:07:19 -06:00
cpufreq kselftest: cpufreq: Get rid of double suspend in rtcwake case 2025-05-09 12:43:39 -06:00
damon selftests/damon/sysfs.sh: test pause file existence 2026-06-04 14:45:02 -07:00
devices
dm-verity selftests: add dm-verity keyring selftests 2026-01-19 15:21:26 +01:00
dmabuf-heaps selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
drivers selftests: drv-net: so_txtime: fix qdisc replace with handle 2026-08-12 17:20:07 -07:00
dt
efivarfs
exec selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
fchmodat2 selftests/fchmodat2: use ksft_finished() 2026-03-27 21:19:37 -07:00
filelock kselftest/filelock: add a .gitignore file 2026-05-28 21:24:44 -07:00
filesystems 13 hotfixes. All are cc:stable. 11 are for MM. All are singletons - 2026-07-27 14:36:26 -07:00
firmware
fpu
ftrace selftests/ftrace: refactor eprobes test to fix argument checks 2026-08-05 09:01:48 +09:00
futex selftests: futex: Add tests for robust release operations 2026-06-03 11:38:53 +02:00
gpio selftests: gpio: add gpio-cdev-uaf to .gitignore 2026-07-08 09:45:43 +02:00
hid selftests/hid: multitouch: test a large ContactCountMaximum 2026-07-01 20:36:12 +02:00
ia64
intel_pstate selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
iommu iommufd/selftest: Add invalidation entry_num and entry_len boundary tests 2026-06-12 10:44:44 -03:00
ipc selftests: fix ARCH normalization to handle command-line argument 2026-03-27 21:19:44 -07:00
ir selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
kcmp selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
kexec selftests/kexec: Ignore selftest binary 2025-09-25 13:43:28 -06:00
kho selftests: kho: test with deferred struct page init 2026-06-01 02:31:37 +03:00
kmod lib/test_kmod: do not hardcode/depend on any filesystem 2025-05-11 17:54:09 -07:00
kselftest selftests: Fix duplicated test number reporting 2026-04-17 11:29:03 -06:00
kselftest_harness selftests: harness: Validate intermixing of kselftest and harness functionality 2026-03-31 13:48:34 -06:00
kvm KVM: selftests: sev_init2_tests: Derive SEV availability from KVM 2026-07-21 12:25:27 +02:00
landlock selftests/landlock: Skip scoped_signal subtest with MSG_OOB if not available 2026-07-10 12:59:11 +02:00
lib
livepatch selftests/livepatch: fix resource leak in test_klp_syscall init error path 2026-06-09 12:38:33 +02:00
liveupdate selftests/liveupdate: Add stress-files kexec test 2026-06-03 21:15:46 +03:00
lkdtm selftests/lkdtm: rename STACKLEAK_ERASING to KSTACK_ERASE 2026-07-15 18:08:11 -07:00
locking
lsm selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
media_tests selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
membarrier selftests/membarrier: Add rseq stress test for CFS throttle interactions 2026-05-05 12:50:48 +02:00
memfd selftests/memfd: remove unused variable 'sig' in fuse_test 2026-06-04 14:45:06 -07:00
memory-hotplug
mincore selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
mm selftests/mm: fix potential wild pointer access of getline due to missing init 2026-07-28 17:37:34 -07:00
module
mount
mount_setattr selftests/mount_setattr: increase tmpfs size for idmapped mount tests 2026-03-17 16:59:45 +01:00
move_mount_set_group selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
mqueue selftests/mqueue: Fix incorrectly named file 2026-03-31 15:01:51 -06:00
mseal_system_mappings selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
namespaces selftests/namespaces: Skip efault tests when listns() is not available 2026-05-11 12:25:32 +02:00
nci selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
net selftests: net: adopt harness for flow label mgr 2026-08-11 18:24:56 -07:00
nolibc selftests/nolibc: test against -Wwrite-strings 2026-05-26 21:06:26 +02:00
ntb
pci_endpoint selftests: pci_endpoint: Skip BAR subrange test on -ENOSPC 2026-04-08 14:41:39 -05:00
pcie_bwctrl
perf_events selftests/perf_events: fix mmap() error check in sigtrap_threads 2026-05-28 21:24:49 -07:00
pid_namespace selftests/pid_namespace: compute pid_max test limits dynamically 2026-05-11 11:09:30 +02:00
pidfd selftests/pidfd: check PIDFD_THREAD survives open_by_handle_at() 2026-07-22 13:55:20 +02:00
pipe selftests/pipe: add pipe_bench microbenchmark 2026-05-28 14:33:25 +02:00
power_supply
powerpc selftests/powerpc: Suppress -Wmaybe-uninitialized with GCC 15 2026-04-01 09:21:04 +05:30
prctl selftests: fix ARCH normalization to handle command-line argument 2026-03-27 21:19:44 -07:00
proc selftests/proc: add /proc/pid/smaps tearing tests 2026-06-04 14:45:06 -07:00
pstore
ptp selftests: ptp: treat unsupported PHC operations as skip 2026-01-27 17:57:28 -08:00
ptrace selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
rcutorture torture: Allow "norm" abbreviation for "normal" 2026-05-24 09:38:59 +02:00
rdma Linux 7.1-rc5 2026-05-25 13:48:00 -03:00
resctrl selftests/resctrl: Reduce L2 impact on CAT test 2026-05-04 18:40:02 -06:00
ring-buffer selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
riscv selftests/riscv: ptrace: Fix memory leak of regset_data in vector tests 2026-07-10 09:32:35 -06:00
rlimits
rseq selftests/rseq: Fix a building error for riscv arch 2026-07-08 10:59:14 -06:00
rtc selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
rust
safesetid
sched
sched_ext selftests/sched_ext: Handle sleeping task affinity changes in numa test 2026-07-23 07:50:37 -10:00
seccomp selftests/seccomp: Fix pointer type mismatch build error 2026-07-15 18:11:29 -07:00
sgx selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
signal selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
size
sparc64 selftests: fix ARCH normalization to handle command-line argument 2026-03-27 21:19:44 -07:00
splice
static_keys
sync selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
syscall_user_dispatch selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
sysctl sysctl: Nixify sysctl.sh 2025-07-23 11:56:02 +02:00
tc-testing Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-08-06 11:53:47 -07:00
tdx selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
thermal/intel selftests: fix ARCH normalization to handle command-line argument 2026-03-27 21:19:44 -07:00
timens selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
timers selftests/posix_timers: Use CLOCK_THREAD_CPUTIME_ID for ITIMER_PROF measurements 2026-05-06 08:33:08 +02:00
tmpfs selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
tpm2 selftests: tpm2: Fix ill defined assertions 2025-12-03 22:55:27 +02:00
tty TTY/Serial changes for 6.19-rc1 2025-12-06 18:38:19 -08:00
turbostat
ublk selftests: ublk: cap nthreads to kernel's actual nr_hw_queues 2026-05-13 07:55:39 -06:00
uevent selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems 2026-06-17 15:37:46 -07:00
user_events selftests/user_events: Wait for deferred event teardown after unregister 2026-07-08 09:33:22 -04:00
vDSO selftests: vDSO: vdso_test_correctness: Add a test for time() 2026-03-11 15:23:24 +01:00
verification selftests/verification: Add initial RV tests 2025-11-11 13:18:55 +01:00
vfio vfio: selftests: Add luuid to libvfio.mk's list of libraries, not to the Makefile 2026-06-30 15:50:55 -06:00
vsock selftests/vsock: skip vng setsid workaround on >= 1.41 2026-06-15 12:52:01 -07:00
watchdog selftests: watchdog: skip ping loop if WDIOF_KEEPALIVEPING not supported 2025-09-16 16:55:04 -06:00
wireguard watchdog: softlockup: panic when lockup duration exceeds N thresholds 2026-01-20 19:44:20 -08:00
x86 selftests/x86: Add shadow stack uprobe CALL test 2026-07-02 13:21:49 +02:00
zram mm: remove unused zpool layer 2025-09-21 14:21:59 -07:00
.gitignore
gen_kselftest_tar.sh
kselftest_deps.sh
kselftest_harness.h selftests: harness: fix pidfd leak in __wait_for_test 2026-05-21 13:44:15 +02:00
kselftest_install.sh
kselftest_module.h
kselftest.h linux_kselftest-next-7.2-rc1 2026-06-16 16:49:07 +05:30
lib.mk selftests: complete kselftest include centralization 2025-11-27 14:24:31 -08:00
Makefile vfs-7.2-rc1.misc 2026-06-15 03:59:45 +05:30
run_kselftest.sh selftests/run_kselftest.sh: Allow choosing per-test log directory 2026-04-13 11:05:39 -06:00