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fix(file-system-monitor): De-duplicate FileOpen alerts for containers #239

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fix(file-system-monitor): De-duplicate FileOpen alerts for containers #239

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6 changes: 6 additions & 0 deletions crates/modules/file-system-monitor/probes.bpf.c
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,12 @@ static __always_inline void on_file_open(void *ctx, struct file *file) {
pid_t tgid = tracker_interesting_tgid(&GLOBAL_INTEREST_MAP);
if (tgid < 0)
return;
unsigned int flags = BPF_CORE_READ(file, f_flags);
// This bit is present in file flags during the second, duplicate trigger of
// the `file_open` hook when running inside container. When the bit is
// present, just stop the program.
if (flags & 01000000)
return;
struct fs_event *event = init_fs_event(FILE_OPENED, tgid);
if (!event)
return;
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