34 lines
1.2 KiB
Diff
34 lines
1.2 KiB
Diff
--- a/kernel/seccomp.c
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+++ b/kernel/seccomp.c
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@@ -614,6 +614,7 @@ int __secure_computing(void)
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#ifdef CONFIG_SECCOMP_FILTER
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static u32 __seccomp_phase1_filter(int this_syscall, struct seccomp_data *sd)
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{
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+ char name[sizeof(current->comm)];
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u32 filter_ret, action;
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int data;
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@@ -644,6 +645,13 @@ static u32 __seccomp_phase1_filter(int t
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case SECCOMP_RET_TRACE:
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return filter_ret; /* Save the rest for phase 2. */
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+ case SECCOMP_RET_LOG:
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+ get_task_comm(name, current);
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+ pr_err_ratelimited("seccomp: %s [%u] tried to call non-whitelisted syscall: %d\n", name, current->pid, this_syscall);
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+ syscall_set_return_value(current, task_pt_regs(current),
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+ -data, 0);
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+ goto skip;
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+
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case SECCOMP_RET_ALLOW:
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return SECCOMP_PHASE1_OK;
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--- a/include/uapi/linux/seccomp.h
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+++ b/include/uapi/linux/seccomp.h
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@@ -28,6 +28,7 @@
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#define SECCOMP_RET_KILL 0x00000000U /* kill the task immediately */
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#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */
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#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */
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+#define SECCOMP_RET_LOG 0x00070000U /* allow + logline */
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#define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */
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#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */
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