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[ML] Add getpriority/setpriority to Linux system call whitelist #1117

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Merged
merged 2 commits into from
Apr 3, 2020
Merged

[ML] Add getpriority/setpriority to Linux system call whitelist #1117

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[ML] Add getpriority/setpriority to Linux system call whitelist
droberts195 Apr 2, 2020
890d906
Merge branch 'master' into add_priority_to_syscall_whitelist
droberts195 Apr 3, 2020
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4 changes: 3 additions & 1 deletion lib/seccomp/CSystemCallFilter_Linux.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -46,12 +46,14 @@ const struct sock_filter FILTER[] = {
// Load the system call number into accumulator
BPF_STMT(BPF_LD | BPF_W | BPF_ABS, SECCOMP_DATA_NR_OFFSET),
// Only applies to X86_64 arch. Jump to disallow for calls using the x32 ABI
BPF_JUMP(BPF_JMP | BPF_JGT | BPF_K, UPPER_NR_LIMIT, 40, 0),
BPF_JUMP(BPF_JMP | BPF_JGT | BPF_K, UPPER_NR_LIMIT, 42, 0),
// If any sys call filters are added or removed then the jump
// destination for each statement including the one above must
// be updated accordingly

// Allowed sys calls, jump to return allow on match
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_getpriority, 42, 0), // for nice
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_setpriority, 41, 0), // for nice
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_read, 40, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_write, 39, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_writev, 38, 0),
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