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[skip ci] kernel: allow root processes to get version (#63)

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2023-01-14 21:52:57 +08:00
committed by GitHub
parent 5e77d1cd5b
commit 0b86cd69fc
1 changed files with 12 additions and 5 deletions
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17
kernel/ksu.c
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@@ -244,6 +244,18 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs)
return 0; return 0;
} }
// Both root manager and root processes should be allowed to get version
if (arg2 == CMD_GET_VERSION) {
if (is_manager() || 0 == current_uid().val) {
u32 version = KERNEL_SU_VERSION;
if (copy_to_user(arg3, & version, sizeof(version))) {
pr_err("prctl reply error, cmd: %d\n", arg2);
return 0;
}
}
}
// all other cmds are for 'root manager' // all other cmds are for 'root manager'
if (!is_manager()) { if (!is_manager()) {
pr_info("Only manager can do cmd: %d\n", arg2); pr_info("Only manager can do cmd: %d\n", arg2);
@@ -280,11 +292,6 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs)
pr_err("prctl copy allowlist error\n"); pr_err("prctl copy allowlist error\n");
} }
} }
} else if (arg2 == CMD_GET_VERSION) {
u32 version = KERNEL_SU_VERSION;
if (copy_to_user(arg3, &version, sizeof(version))) {
pr_err("prctl reply error, cmd: %d\n", arg2);
}
} }
return 0; return 0;