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Viktor Malik 15c799f7f8 bpftool: Fix readlink usage in get_fd_type 
[ Upstream commit 0053f7d39d ]

The `readlink(path, buf, sizeof(buf))` call reads at most sizeof(buf)
bytes and *does not* append null-terminator to buf. With respect to
that, fix two pieces in get_fd_type:

1. Change the truncation check to contain sizeof(buf) rather than
   sizeof(path).
2. Append null-terminator to buf.

Reported by Coverity.

Signed-off-by: Viktor Malik <vmalik@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/bpf/20250129071857.75182-1-vmalik@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-06-04 14:38:04 +02:00
..
accounting SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00
arch tools/x86/kcpuid: Protect against faulty "max subleaf" values 2024-10-17 15:11:28 +02:00
bootconfig tools/bootconfig: Fix the wrong format specifier 2025-03-13 12:50:10 +01:00
bpf bpftool: Fix readlink usage in get_fd_type 2025-06-04 14:38:04 +02:00
build tools/build: Don't pass test log files to linker 2025-06-04 14:37:55 +02:00
cgroup tools/cgroup/slabinfo.py: updated to work on current kernel 2021-04-23 14:42:40 -07:00
debugging tools: Fix "the the" in a message in kernel-chktaint 2021-06-13 17:01:17 -06:00
edid tools/edid: Move EDID data sets from Documentation/ 2020-02-19 04:10:32 -07:00
firewire treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
firmware Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
gpio tools: gpio: fix debounce_period_us output of lsgpio 2023-06-21 15:59:12 +02:00
hv vmbus_testing: fix wrong python syntax for integer value comparison 2023-09-19 12:22:28 +02:00
iio tools/iio: Add memory allocation failure check for trigger_name 2024-10-17 15:11:52 +02:00
include tools: move alignment-related macros to new <linux/align.h> 2024-09-04 13:23:37 +02:00
io_uring tools/io_uring/io_uring-cp: sync with liburing example 2021-08-13 08:58:11 -06:00
kvm/kvm_stat tools/kvm_stat: fix display of error when multiple processes are found 2022-08-11 13:07:51 +02:00
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 libbpf: Fix out-of-bound read 2025-06-04 14:38:00 +02:00
memory-model tools/memory-model: Fix bug in lock.cat 2024-08-19 05:45:15 +02:00
objtool objtool: Stop UNRET validation on UD2 2025-05-02 07:44:37 +02:00
pci tools: PCI: Zero-initialize param 2021-08-05 11:01:30 +01:00
pcmcia .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
perf perf python: Check if there is space to copy all the event 2025-04-10 14:32:02 +02:00
power pm: cpupower: bench: Prevent NULL dereference on malloc failure 2025-05-02 07:43:53 +02:00
rcu tools/rcu: Add drgn script to dump number of RCU callbacks 2021-05-10 15:39:19 -07:00
scripts tools: Override makefile ARCH variable if defined, but empty 2024-12-14 19:51:30 +01:00
spi spi: tools: make a symbolic link to the header file spi.h 2021-04-22 16:30:39 +01:00
testing selftests/net: have gro.sh -t return a correct exit code 2025-06-04 14:38:00 +02:00
thermal/tmon tools/thermal: Fix possible path truncations 2022-08-17 14:24:15 +02:00
time treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
tracing tools/latency-collector: Fix -Wformat-security compile warns 2024-06-16 13:39:12 +02:00
usb usbip: tools: Fix detach_port() invalid port error path 2024-11-08 16:25:54 +01:00
virtio tools/virtio: fix build 2024-03-01 13:21:52 +01:00
vm tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep" 2022-12-08 11:28:42 +01:00
wmi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
Makefile tracing/tools: Add the latency-collector to tools directory 2021-02-12 11:52:59 -05:00