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sys/vfs: Check suggested fd is valid

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Avoids out of bounds array access on _vfs_open_files if vfs_bind is
called with an invalid (positive) fd number
This commit is contained in:
Joakim Nohlgård 2018-02-12 08:45:19 +01:00
parent 368818aa23
commit 490e7c87e0
1 changed files with 4 additions and 4 deletions
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8
sys/vfs/vfs.c
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@ -871,10 +871,10 @@ static inline int _allocate_fd(int fd)
break;
}
}
if (fd >= VFS_MAX_OPEN_FILES) {
/* The _vfs_open_files array is full */
return -ENFILE;
}
}
if (fd >= VFS_MAX_OPEN_FILES) {
/* The _vfs_open_files array is full */
return -ENFILE;
}
else if (_vfs_open_files[fd].pid != KERNEL_PID_UNDEF) {
/* The desired fd is already in use */