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fix: generate telemetry for host-mounted /sys/ paths in containers #2493

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fix: generate telemetry for host-mounted /sys/ paths in containers #2493

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63db3c9
fix: generate telemetry for host-mounted /sys/ paths in containers
asmit27rai Mar 10, 2026
91f3c2c
Merge branch 'main' into 1851
asmit27rai Mar 10, 2026
73b1080
Merge branch 'main' into 1851
asmit27rai Mar 11, 2026
90defbe
Merge branch 'main' into 1851
asmit27rai Mar 12, 2026
b3d9e1f
Merge branch 'main' into 1851
asmit27rai Mar 12, 2026
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22 changes: 20 additions & 2 deletions KubeArmor/BPF/system_monitor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1894,6 +1894,13 @@ static __always_inline int trace_ret_generic(u32 id, struct pt_regs *ctx, u64 ty
return 0;
}

static __always_inline bool is_container_context()
{
struct task_struct *task = (struct task_struct *)bpf_get_current_task();
u32 pid_ns = get_task_pid_ns_id(task);
return pid_ns != PROC_PID_INIT_INO;
}

#define DIR_PROC "/proc/"
static __always_inline int isProcDir(char *path)
{
Expand Down Expand Up @@ -1941,7 +1948,15 @@ int kprobe__open(struct pt_regs *ctx)
char path[8];
bpf_probe_read(path, 8, pathname);

if (isProcDir(path) == 0 || isSysDir(path) == 0)
if (isProcDir(path) == 0)
{
return 0;
}

// Only skip /sys/ paths for host processes.
// Container processes may access host-mounted /sys/ paths
// and need telemetry for policy enforcement.
if (isSysDir(path) == 0 && !is_container_context())
{
return 0;
}
Expand Down Expand Up @@ -1972,7 +1987,10 @@ int kprobe__openat(struct pt_regs *ctx)
bpf_map_update_elem(&proc_file_access, &tgid, &path, BPF_ANY);
return 0;
}
else if (isSysDir(path.path) == 0)
// Only skip /sys/ paths for host processes.
// Container processes may access host-mounted /sys/ paths
// and need telemetry for policy enforcement.
else if (isSysDir(path.path) == 0 && !is_container_context())
{
return 0;
}
Expand Down