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mmap, mremap: Check arguments in the same order as in Linux

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Refs: #1137
Change-Id: I4fd2ac83b013a2741a3facce4dd7e0c37b14fd25
This commit is contained in:
Ken Sato
2018-06-27 11:43:42 +09:00
committed by Dominique Martinet
parent f185be06eb
commit 11756d96ef
3 changed files with 25 additions and 13 deletions
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5
arch/arm64/kernel/syscall.c
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@@ -1801,8 +1801,9 @@ SYSCALL_DECLARE(mmap)
goto out;
}
if ((flags & MAP_FIXED) && ((addr < region->user_start)
|| (region->user_end <= addr))) {
if (addr < region->user_start
|| region->user_end <= addr
|| len > (region->user_end - region->user_start)) {
ekprintf("sys_mmap(%lx,%lx,%x,%x,%x,%lx):ENOMEM\n",
addr0, len0, prot, flags0, fd, off0);
error = -ENOMEM;

5
arch/x86_64/kernel/syscall.c
View File

@@ -1570,8 +1570,9 @@ SYSCALL_DECLARE(mmap)
goto out;
}
if ((flags & MAP_FIXED) && ((addr < region->user_start)
|| (region->user_end <= addr))) {
if (addr < region->user_start
|| region->user_end <= addr
|| len > (region->user_end - region->user_start)) {
ekprintf("sys_mmap(%lx,%lx,%x,%x,%x,%lx):ENOMEM\n",
addr0, len0, prot, flags0, fd, off0);
error = -ENOMEM;