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authorWill Drewry <wad@chromium.org>2012-04-12 16:48:01 -0500
committerJames Morris <james.l.morris@oracle.com>2012-04-14 11:13:21 +1000
commitbb6ea4301a1109afdacaee576fedbfcd7152fc86 (patch)
tree5412219057d8e0ec2a30d0a1ad4f6b7dd398c754 /include/linux
parenta0727e8ce513fe6890416da960181ceb10fbfae6 (diff)
seccomp: Add SECCOMP_RET_TRAP
Adds a new return value to seccomp filters that triggers a SIGSYS to be delivered with the new SYS_SECCOMP si_code. This allows in-process system call emulation, including just specifying an errno or cleanly dumping core, rather than just dying. Suggested-by: Markus Gutschke <markus@chromium.org> Suggested-by: Julien Tinnes <jln@chromium.org> Signed-off-by: Will Drewry <wad@chromium.org> Acked-by: Eric Paris <eparis@redhat.com> v18: - acked-by, rebase - don't mention secure_computing_int() anymore v15: - use audit_seccomp/skip - pad out error spacing; clean up switch (indan@nul.nu) v14: - n/a v13: - rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc v12: - rebase on to linux-next v11: - clarify the comment (indan@nul.nu) - s/sigtrap/sigsys v10: - use SIGSYS, syscall_get_arch, updates arch/Kconfig note suggested-by (though original suggestion had other behaviors) v9: - changes to SIGILL v8: - clean up based on changes to dependent patches v7: - introduction Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/seccomp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/seccomp.h b/include/linux/seccomp.h
index b4ce2c816e06..317ccb78cf40 100644
--- a/include/linux/seccomp.h
+++ b/include/linux/seccomp.h
@@ -19,6 +19,7 @@
* selects the least permissive choice.
*/
#define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */
+#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */
#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */
#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */