path: root/samples/seccomp/bpf-helper.c
AgeCommit message (Collapse)AuthorFilesLines
2015-02-17samples/seccomp: improve label helperKees Cook1-0/+6
Fixes a potential corruption with uninitialized stack memory in the seccomp BPF sample program. [ coding-style fixlet] Signed-off-by: Kees Cook <> Reported-by: Robert Swiecki <> Tested-by: Robert Swiecki <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2012-04-14Documentation: prctl/seccomp_filterWill Drewry1-0/+89
Documents how system call filtering using Berkeley Packet Filter programs works and how it may be used. Includes an example for x86 and a semi-generic example using a macro-based code generator. Acked-by: Eric Paris <> Signed-off-by: Will Drewry <> Acked-by: Kees Cook <> v18: - added acked by - update no new privs numbers v17: - remove @compat note and add Pitfalls section for arch checking ( v16: - v15: - v14: - rebase/nochanges v13: - rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc v12: - comment on the ptrace_event use - update arch support comment - note the behavior of SECCOMP_RET_DATA when there are multiple filters ( - lots of samples/ clean up incl 64-bit bpf-direct support ( - rebase to linux-next v11: - overhaul return value language, updates ( - comment on do_exit(SIGSYS) v10: - update for SIGSYS - update for new seccomp_data layout - update for ptrace option use v9: - updated bpf-direct.c for SIGILL v8: - add PR_SET_NO_NEW_PRIVS to the samples. v7: - updated for all the new stuff in v7: TRAP, TRACE - only talk about PR_SET_SECCOMP now - fixed bad JLE32 check ( - adds dropper.c: a simple system call disabler v6: - tweak the language to note the requirement of PR_SET_NO_NEW_PRIVS being called prior to use. ( v5: - update sample to use system call arguments - adds a "fancy" example using a macro-based generator - cleaned up bpf in the sample - update docs to mention arguments - fix prctl value ( - language cleanup ( v4: - update for no_new_privs use - minor tweaks v3: - call out BPF <-> Berkeley Packet Filter ( - document use of tentative always-unprivileged - guard sample compilation for i386 and x86_64 v2: - move code to samples ( Signed-off-by: James Morris <>