selftest/bpf: Ensure no module loading in bpf_setsockopt(TCP_CONGESTION)

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This patch adds a test to ensure bpf_setsockopt(TCP_CONGESTION, "not_exist")
will not trigger the kernel module autoload.

Before the fix:

  [   40.535829] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274
  [...]
  [   40.552134]  tcp_ca_find_autoload.constprop.0+0xcb/0x200
  [   40.552689]  tcp_set_congestion_control+0x99/0x7b0
  [   40.553203]  do_tcp_setsockopt+0x3ed/0x2240
  [...]
  [   40.556041]  __bpf_setsockopt+0x124/0x640

Signed-off-by: Martin KaFai Lau <martin.lau@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220830231953.792412-1-martin.lau@linux.dev

...

This commit is contained in:

Martin KaFai Lau 2022-08-30 16:19:53 -07:00 • committed by Daniel Borkmann

parent 84e5a0f208

commit 197072945a

1 changed files with 4 additions and 0 deletions

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tools/testing/selftests/bpf/progs/setget_sockopt.c

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