Kumar Kartikeya Dwivedi e6a908c593 libbpf: Fix skel_internal.h to set errno on loader retval < 0 ... [ Upstream commit e68ac00827 ] When the loader indicates an internal error (result of a checked bpf system call), it returns the result in attr.test.retval. However, tests that rely on ASSERT_OK_PTR on NULL (returned from light skeleton) may miss that NULL denotes an error if errno is set to 0. This would result in skel pointer being NULL, while ASSERT_OK_PTR returning 1, leading to a SEGV on dereference of skel, because libbpf_get_error relies on the assumption that errno is always set in case of error for ptr == NULL. In particular, this was observed for the ksyms_module test. When executed using `./test_progs -t ksyms`, prior tests manipulated errno and the test didn't crash when it failed at ksyms_module load, while using `./test_progs -t ksyms_module` crashed due to errno being untouched. Fixes: 6723474373 (libbpf: Generate loader program out of BPF ELF file.) Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210927145941.1383001-11-memxor@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-11-18 19:16:27 +01:00
..
accounting
arch	A set of fixes for X86:	2021-09-26 10:09:20 -07:00
bootconfig	tools/bootconfig: Define memblock_free_ptr() to fix build error	2021-09-15 09:49:48 -07:00
bpf	Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-07-31 11:23:26 -07:00
build	perf cs-etm: Update OpenCSD decoder for ETE	2021-09-03 08:16:00 -03:00
cgroup
debugging
edid
firewire
firmware
gpio
hv
iio
include	tools include UAPI: Sync sound/asound.h copy with the kernel sources	2021-10-05 14:51:33 -03:00
io_uring	tools/io_uring/io_uring-cp: sync with liburing example	2021-08-13 08:58:11 -06:00
kvm/kvm_stat	KVM: kvm_stat: do not show halt_wait_ns	2021-10-18 14:07:18 -04:00
laptop
leds
lib	libbpf: Fix skel_internal.h to set errno on loader retval < 0	2021-11-18 19:16:27 +01:00
memory-model	tools/memory-model: Document data_race(READ_ONCE())	2021-07-27 11:48:55 -07:00
objtool	objtool: Handle __sanitize_cov*() tail calls	2021-11-18 19:16:23 +01:00
pci	tools: PCI: Zero-initialize param	2021-08-05 11:01:30 +01:00
pcmcia
perf	perf script: Fix PERF_SAMPLE_WEIGHT_STRUCT support	2021-10-31 12:51:41 -03:00
power
rcu
scripts
spi
testing	selftests/bpf: Fix strobemeta selftest regression	2021-11-18 19:16:21 +01:00
thermal/tmon	tools/thermal/tmon: Add cross compiling support	2021-08-14 15:33:19 +02:00
time
tracing	tools/latency-collector: Use correct size when writing queue_full_warning	2021-11-18 19:16:19 +01:00
usb	usb: testusb: Fix for showing the connection speed	2021-09-14 10:31:41 +02:00
virtio	tools/virtio: fix build	2021-08-11 06:44:24 -04:00
vm	tools/vm/page-types: remove dependency on opt_file for idle page tracking	2021-09-24 16:13:35 -07:00
wmi
Makefile