Maxim Mikityanskiy da54ab1495 bpf: Fix the test_task_vma selftest to support output shorter than 1 kB ... The test for bpf_iter_task_vma assumes that the output will be longer than 1 kB, as the comment above the loop says. Due to this assumption, the loop becomes infinite if the output turns to be shorter than 1 kB. The return value of read_fd_into_buffer is 0 when the end of file was reached, and len isn't being increased any more. This commit adds a break on EOF to handle short output correctly. For the reference, this is the contents that I get when running test_progs under vmtest.sh, and it's shorter than 1 kB: 00400000-00401000 r--p 00000000 fe:00 25867 /root/bpf/test_progs 00401000-00674000 r-xp 00001000 fe:00 25867 /root/bpf/test_progs 00674000-0095f000 r--p 00274000 fe:00 25867 /root/bpf/test_progs 0095f000-00983000 r--p 0055e000 fe:00 25867 /root/bpf/test_progs 00983000-00a8a000 rw-p 00582000 fe:00 25867 /root/bpf/test_progs 00a8a000-0484e000 rw-p 00000000 00:00 0 7f6c64000000-7f6c64021000 rw-p 00000000 00:00 0 7f6c64021000-7f6c68000000 ---p 00000000 00:00 0 7f6c6ac8f000-7f6c6ac90000 r--s 00000000 00:0d 8032 anon_inode:bpf-map 7f6c6ac90000-7f6c6ac91000 ---p 00000000 00:00 0 7f6c6ac91000-7f6c6b491000 rw-p 00000000 00:00 0 7f6c6b491000-7f6c6b492000 r--s 00000000 00:0d 8032 anon_inode:bpf-map 7f6c6b492000-7f6c6b493000 rw-s 00000000 00:0d 8032 anon_inode:bpf-map 7ffc1e23d000-7ffc1e25e000 rw-p 00000000 00:00 0 7ffc1e3b8000-7ffc1e3bc000 r--p 00000000 00:00 0 7ffc1e3bc000-7ffc1e3bd000 r-xp 00000000 00:00 0 7fffffffe000-7ffffffff000 --xp 00000000 00:00 0 Fixes: e8168840e1 ("selftests/bpf: Add test for bpf_iter_task_vma") Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20211130181811.594220-1-maximmi@nvidia.com		2021-12-03 23:49:14 +01:00
..
accounting
arch	Merge remote-tracking branch 'torvalds/master' into perf/core	2021-11-06 15:49:33 -03:00
bootconfig
bpf	bpftool: Migrate off of deprecated bpf_create_map_xattr() API	2021-12-02 15:23:40 -08:00
build	bpf, mips: Fix build errors about __NR_bpf undeclared	2021-11-26 22:11:25 +01:00
cgroup
counter	tools/counter: Create Counter tools	2021-10-17 10:54:16 +01:00
debugging
edid
firewire
firmware
gpio
hv
iio
include	bpf: Pass a set of bpf_core_relo-s to prog_load command.	2021-12-02 11:18:35 -08:00
io_uring
kvm/kvm_stat	KVM: kvm_stat: do not show halt_wait_ns	2021-10-18 14:07:18 -04:00
laptop
leds
lib	libbpf: Reduce bpf_core_apply_relo_insn() stack usage.	2021-12-03 13:21:59 -08:00
memory-model
objtool	Tracing updates for 5.16:	2021-11-01 20:05:19 -07:00
pci
pcmcia
perf	perf: Mute libbpf API deprecations temporarily	2021-12-03 11:54:51 -08:00
power
rcu
scripts	tools, build: Add RISC-V to HOSTARCH parsing	2021-11-01 17:08:21 +01:00
spi
testing	bpf: Fix the test_task_vma selftest to support output shorter than 1 kB	2021-12-03 23:49:14 +01:00
thermal/tmon
time
tracing	tools/latency-collector: Use correct size when writing queue_full_warning	2021-10-25 22:27:19 -04:00
usb
virtio
vm	tools/vm/page-types.c: print file offset in hexadecimal	2021-11-06 13:30:40 -07:00
wmi
Makefile	tools/lib/lockdep: drop liblockdep	2021-11-12 11:07:17 -08:00