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Permit MAP_POPULATE with pledge()

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Justine Tunney 2022-07-14 13:04:28 -07:00
parent 0a589add41
commit ccd057a85d
1 changed files with 1 additions and 2 deletions
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3
libc/mem/pledge.c
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@ -514,7 +514,6 @@ static bool AllowGetsockopt(struct Filter *f) {
// The flags parameter of mmap() must not have:
//
// - MAP_LOCKED (0x02000)
// - MAP_POPULATE (0x08000)
// - MAP_NONBLOCK (0x10000)
// - MAP_HUGETLB (0x40000)
//
@ -524,7 +523,7 @@ static bool AllowMmap(struct Filter *f) {
struct sock_filter fragment[] = {
/*L0*/ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_linux_mmap, 0, 6 - 1),
/*L1*/ BPF_STMT(BPF_LD | BPF_W | BPF_ABS, OFF(args[3])), // flags
/*L2*/ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x5a000),
/*L2*/ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x52000),
/*L3*/ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, 0, 5 - 4),
/*L4*/ BPF_STMT(BPF_RET | BPF_K, SECCOMP_RET_ALLOW),
/*L5*/ BPF_STMT(BPF_LD | BPF_W | BPF_ABS, OFF(nr)),