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| author | John Crispin <john@openwrt.org> | 2015-03-26 10:58:03 +0000 |
|---|---|---|
| committer | John Crispin <john@openwrt.org> | 2015-03-26 10:58:03 +0000 |
| commit | c67144cc058eafa4ad3ffe9015bc0682efb7d86f (patch) | |
| tree | a904a12ce041dac3d8812a241dbea1f476ddbcd3 | |
| parent | d95e0687aa596342aa9e3851d9ce33443ca644d0 (diff) | |
| download | mtk-20170518-c67144cc058eafa4ad3ffe9015bc0682efb7d86f.zip mtk-20170518-c67144cc058eafa4ad3ffe9015bc0682efb7d86f.tar.gz mtk-20170518-c67144cc058eafa4ad3ffe9015bc0682efb7d86f.tar.bz2 | |
kernel: extend seccomp with a LOG action
Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 45007
| -rw-r--r-- | target/linux/generic/patches-3.18/999-seccomp_log.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/999-seccomp_log.patch b/target/linux/generic/patches-3.18/999-seccomp_log.patch new file mode 100644 index 0000000..1f90b32 --- /dev/null +++ b/target/linux/generic/patches-3.18/999-seccomp_log.patch @@ -0,0 +1,34 @@ +--- a/kernel/seccomp.c ++++ b/kernel/seccomp.c +@@ -614,6 +614,7 @@ + #ifdef CONFIG_SECCOMP_FILTER + static u32 __seccomp_phase1_filter(int this_syscall, struct seccomp_data *sd) + { ++ char name[sizeof(current->comm)]; + u32 filter_ret, action; + int data; + +@@ -644,6 +645,13 @@ + case SECCOMP_RET_TRACE: + return filter_ret; /* Save the rest for phase 2. */ + ++ case SECCOMP_RET_LOG: ++ get_task_comm(name, current); ++ pr_err_ratelimited("seccomp: %s [%u] tried to call non-whitelisted syscall: %d\n", name, current->pid, this_syscall); ++ syscall_set_return_value(current, task_pt_regs(current), ++ -data, 0); ++ goto skip; ++ + case SECCOMP_RET_ALLOW: + return SECCOMP_PHASE1_OK; + +--- a/include/uapi/linux/seccomp.h ++++ b/include/uapi/linux/seccomp.h +@@ -28,6 +28,7 @@ + #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_LOG 0x00070000U /* allow + logline */ + #define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */ + #define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */ + |