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Xiang Mei 5d17af9eb2 selftests/tc-testing: add test for HFSC divide-by-zero in rtsc_min() 
Add a regression test for the divide-by-zero in rtsc_min() triggered
when m2sm() converts a large m1 value (e.g. 32gbit) to a u64 scaled
slope reaching 2^32. rtsc_min() stores the difference of two such u64
values (sm1 - sm2) in a u32 variable `dsm`, truncating 2^32 to zero
and causing a divide-by-zero oops in the concave-curve intersection
path. The test configures an HFSC class with m1=32gbit d=1ms m2=0bit,
sends a packet to activate the class, waits for it to drain and go
idle, then sends another packet to trigger reactivation through
rtsc_min().

Signed-off-by: Xiang Mei <xmei5@asu.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Link: https://patch.msgid.link/20260326204310.1549327-2-xmei5@asu.edu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
History 2026-03-27 20:41:11 -07:00
..
accounting delayacct: fix build regression on accounting tool 2026-02-12 15:45:56 -08:00
arch tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources 2026-03-22 18:31:54 -03:00
bootconfig tools/bootconfig: fix fd leak in load_xbc_file() on fstat failure 2026-03-19 08:43:06 +09:00
bpf resolve_btfids: Fix linker flags detection 2026-03-07 08:51:51 -08:00
build tools build: Fix rust cross compilation 2026-03-04 11:37:30 -03:00
certs tools/certs: Add print-cert-tbs-hash.sh 2022-05-23 18:47:49 +03:00
cgroup memcg_slabinfo: Fix use of PG_slab 2025-07-23 11:55:22 +02:00
counter tools/counter: add direction change event to watcher 2025-02-05 13:22:04 +09:00
crypto crypto: tools/ccp - Remove unused variable 2024-08-30 18:22:30 +08:00
debugging kernel-chktaint: add reporting for tainted modules 2026-01-26 19:07:15 -08:00
dma dma-mapping updates for Linux 6.19: 2025-12-06 09:25:05 -08:00
docs tools: sphinx-build-wrapper: improve its help message 2026-02-02 09:57:46 -07:00
firewire tools/firewire: Fix several incorrect format specifiers 2024-11-14 09:12:04 +09:00
firmware Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
gpio tools: gpio: remove the include directory on make clean 2025-09-04 16:29:28 +02:00
hv tools/hv: fcopy: Fix irregularities with size of ring buffer 2025-07-15 06:25:33 +00:00
iio iio: add power and energy measurement modifiers 2025-09-13 13:47:19 +01:00
include tools headers: Synchronize linux/build_bug.h with the kernel sources 2026-03-22 18:34:39 -03:00
kvm/kvm_stat tools/kvm_stat: use canonical ftrace path 2023-03-29 06:52:08 -04:00
laptop change email address for Pali Rohár 2020-04-10 15:36:22 -07:00
leds .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
lib perf tools changes for v7.0: 2026-02-21 10:51:08 -08:00
memory-model tools/memory-model/Documentation: Fix SRCU section in explanation.txt 2025-04-23 12:17:04 -07:00
mm tools/mm/slabinfo: fix --partial long option mapping 2026-01-20 19:24:43 -08:00
net NFSD 7.0 Release Notes 2026-02-12 08:23:53 -08:00
objtool objtool: Fix Clang jump table detection 2026-03-16 15:31:25 -07:00
pcmcia .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
perf perf kvm stat: Fix relative paths for including headers 2026-03-17 17:16:45 -03:00
power cpupower: Add intel_pstate turbo boost support for Intel platforms 2026-03-03 11:18:53 -07:00
rcu tools/rcu: Remove RCU Tasks Rude asynchronous APIs from rcu-updaters.sh 2024-07-29 07:39:32 +05:30
sched tools/sched: Add dl_bw_dump.py for printing bandwidth accounting info 2025-07-14 10:59:33 +02:00
sched_ext tools/sched_ext: Add -fms-extensions to bpf build flags 2026-03-02 22:00:23 -10:00
scripts tools headers: Update the syscall tables and unistd.h, to support the new 'rseq_slice_yield' syscall 2026-03-05 17:20:23 -03:00
sound ASoC: dapm-graph: set fill colour of turned on nodes 2025-02-24 18:35:54 +00:00
spi spi: tools: Add include folder to .gitignore 2026-02-09 12:27:31 +00:00
testing selftests/tc-testing: add test for HFSC divide-by-zero in rtsc_min() 2026-03-27 20:41:11 -07:00
thermal tools/thermal/thermal-engine: Fix format string bug in thermal-engine 2025-11-25 11:00:28 +01:00
time treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
tracing rtla: Fix parse_cpu_set() bug introduced by strtoi() 2026-01-13 08:32:52 +01:00
usb tools: usb: usbip: remove dead-link from README 2026-01-23 17:16:42 +01:00
verification verification/rvgen: Remove unused variable declaration from containers 2026-01-12 07:43:51 +01:00
virtio tools/virtio: add device, device_driver stubs 2025-12-24 08:02:56 -05:00
wmi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
workqueue workqueue: remove unnecessary import and function in wq_monitor.py 2024-03-25 10:11:32 -10:00
writeback writeback: add wb_monitor.py script to monitor writeback info on bdi 2024-05-05 17:53:51 -07:00
Makefile tools/dma: move dma_map_benchmark from selftests to tools/dma 2025-10-29 09:41:40 +01:00