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linuxulator: return EBADF for O_PATH mmap() #2233

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linuxulator: return EBADF for O_PATH mmap() #2233

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4 changes: 4 additions & 0 deletions sys/compat/linux/linux_mmap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,10 @@ static int
linux_mmap_check_fp(struct file *fp, int flags, int prot, int maxprot)
{

/* Linux returns EBADF if mmap() is called on an O_PATH file descriptor */
if (fp->f_ops == &path_fileops)
return (EBADF);

/* Linux mmap() just fails for O_WRONLY files */
if ((fp->f_flag & FREAD) == 0)
return (EACCES);
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